TW202339881A - A screw thread rubbing plate set, tooth module and screw - Google Patents

Abstract

A screw thread rubbing plate set is used to reduce the screw manufacturing cost and solve the problem of excessive resistance of screw tapping and drilling. Includes: a first tooth plate, a surface of the first tooth plate has a thread forming part, the thread forming part has several forming grooves, the first tooth plate has a molding part, the molding is located on the extension path of at least one forming groove, the forming part includes several convex arc tooth parts and several V-shaped cutting edge parts, each of the convex arc tooth parts has several tooth peaks, and each of the V-shaped cutting edge parts has a plurality of edge peaks, each of the tooth peaks and each of the edge peaks intersects with the extending direction of the plurality of forming grooves; and a second tooth plate, the first tooth plate and the second tooth plate can move relatively in parallel, a plurality of screw threads are formed on a rod body that is clamped together. And the tooth module for the screw rubbing plate set, and the formed screw.

Description

Screw die plate set, tooth module and screws

The present invention relates to a screw threading plate set, in particular to a screw threading plate set capable of forming serrated threads, a tooth module with a sawtooth tooth mold, and screws formed by the screw threading plate set.

Wood drilling screws are drilled with the tapered end of the screw toward the surface of the wooden workpiece, and in conjunction with the threads of the screw, they continuously cut and discharge the wood fibers of the wooden workpiece, thereby forming a tight fit between the screw and the wooden workpiece. catch. In order to reduce the resistance of the screw when drilling into the wooden workpiece, it is known that the surface of the screw has a short V-shaped groove. The V-shaped groove extends axially from the tapered end of the screw toward the emerging direction to span several threads. In this way, the V-shaped groove can reduce the resistance of the screw drilling into the wooden workpiece.

Generally speaking, when screws are formed, the screw shaft body is clamped between two die-threading plates. The two die-threading plates have predetermined thread molding patterns on the clamping surfaces of the screw shaft body. The anti-parallel movement of the two tooth-washing plates is used to roll the threads of the screw rod body. After the screw threads are formed, the above-mentioned V-shaped grooves are milled. That is, when making the conventional screws, multiple processes must be performed, which increases the cost. In addition, the V-shaped grooves of conventional screws are still insufficient in reducing the resistance of screws drilling into wooden workpieces.

In order to solve the above problems, the object of the present invention is to provide a screw die plate set that can mold screws with better cutting force at one time to improve production efficiency.

A secondary object of the present invention is to provide a tooth module that can be installed on a die rubbing plate. When forming a screw, the threads of the screw can be simultaneously formed into a serrated shape, so that the screw has better cutting force.

Another object of the present invention is to provide a screw with serrated threads that can reduce the resistance of the screw when drilling into a workpiece.

Directionality or similar terms are used throughout the present invention, such as "front", "back", "left", "right", "upper (top)", "lower (bottom)", "inner", "outer" , "side", etc. mainly refer to the directions of the attached drawings. Each directionality or its approximate terms are only used to assist in explaining and understanding the various embodiments of the present invention, and are not intended to limit the present invention.

The use of the quantifier "a" or "an" in the elements and components described throughout the present invention is only for convenience of use and to provide a common sense of the scope of the present invention; in the present invention, it should be interpreted as including one or at least one, and single The concept of also includes the plural unless it is obvious that something else is meant.

Approximate terms such as "combination", "combination" or "assembly" used throughout the present invention mainly include forms that can be separated without damaging the components after being connected, or components that are inseparable after being connected, and are based on common knowledge in this field. You can choose according to the material of the components to be connected or the assembly requirements.

The screw die plate set of the present invention includes: a first die plate, a thread forming part on a surface of the first die plate, the thread forming part has a plurality of forming grooves, the first die plate has A tip molding part is located below the thread molding part. The first die plate has a molding part located on the extension path of at least one molding groove. The molding part includes a plurality of convex arc tooth parts and Several V-shaped cutting edge portions, each of the convex arc tooth portions has a plurality of tooth peaks, each of the V-shaped cutting edge portions has a plurality of tooth peaks, each tooth peak and each tooth peak are an extension of the at least one forming groove The directions intersect; and a second die plate, a surface of the second die plate has a thread forming part and a tip forming part corresponding to the first die plate, the first die plate and the second die plate can The relative parallel movement is used to form several threads on a jointly clamped rod body.

In the tooth module of the present invention, a surface of the tooth module has a molded portion, the molded portion includes a plurality of convex arc tooth portions and a plurality of V-shaped cutting edge portions, and each of the convex arc tooth portions has a plurality of tooth peaks, Each V-shaped cutting edge portion has several edge peaks.

The screw of the present invention includes: a rod body; and a plurality of screw threads, which are connected and wound around the rod body to form a thread. The periphery of at least one screw thread has several concave arc serrations and several notches. department.

Accordingly, in the screw die plate set of the present invention, the first die plate has the shaping portion, and the shaping portion has a plurality of convex arc tooth portions and a plurality of spaced-apart convex arc tooth portions on the extension path of at least one shaping groove. A V-shaped cutting edge portion, so that when the rod body is formed into threads by the first die plate and the second die plate, several concave arc serrations can be molded on the threads. Several V-shaped notches can be used to form screws with concave arc serrations and several V-shaped notches in one go. There is no need for secondary processing to mill V-shaped grooves, which can achieve better production efficiency.

In addition, the molded portion may be located on the tooth module so as to be detachably coupled to the coupling groove of the first tooth plate through the tooth module. In this way, according to the distribution pattern of the screw threads to be formed, the molded screws can be in relative position or offset at the concave arc serrations of the two adjacent screw teeth, and the tooth module can be replaced according to different needs, which can be convenient. Processing effect.

In addition, the screw can cut workpieces such as wood through the plurality of concave arc serrations and the plurality of V-shaped incisions, thereby reducing the tapping resistance of the screw. Moreover, the plurality of concave arc saw teeth can cut off the wood fibers wrapped around the screws, thereby reducing the cutting resistance of the plurality of V-shaped incisions to achieve the effect of smoothly drilling into the workpiece.

Wherein, several tooth peaks of each convex arc tooth portion extend parallel to each other. In this way, the threads can be formed with consistent concave arc serrations.

Wherein, several edge peaks of each V-shaped cutting edge portion extend parallel to each other. In this way, a consistent V-shaped notch can be formed on the screw thread.

Wherein, the plurality of convex arc tooth portions and the plurality of V-shaped cutting edge portions are arranged at intervals from each other. In this way, the periphery of a screw thread can be formed into adjacent concave arc serrated portions and cutout portions. The concave arc serrated portions and the plurality of cutout portions can cooperate to reduce the tapping resistance of the screw and ensure smooth drilling. The function of tapping into the workpiece.

Wherein, on the cross section of the convex arc tooth portion, the tooth peaks are located on a virtual arc. In this way, the convex arc tooth portion can shape the periphery of at least one thread into a concave arc saw tooth.

Wherein, in the cross section of the V-shaped cutting edge portion, the plurality of edge peaks are located on a virtual horizontal line. In this way, the V-shaped cutting edge portion can form a V-shaped cut with a uniform depth on the periphery of the thread.

Wherein, in the cross section of the shaping part, the blade peaks are lower than the tooth peaks. In this way, each tooth peak of the convex arc tooth portion can protrude relative to the plurality of blade peaks, so that the convex arc tooth portion can reliably form a concave arc effect on the periphery of the screw thread.

Wherein, the shaping part has at least a first shaping row and a second shaping row. The first shaping row and the second shaping row are each aligned with at least one of the shaping grooves. The first shaping row The second shaping row has a plurality of convex arc tooth portions and a plurality of V-shaped cutting edge portions spaced apart from each other. In this way, the shaping part can be used to form several concave arc serrated parts and several notch parts on at least two screw threads, which can further reduce the drilling resistance and have the effect of the screw smoothly tapping into the workpiece.

Wherein, the convex arc tooth portion and the V-shaped cutting edge portion of the first shaping row are respectively offset from the convex arc tooth portion and the V-shaped cutting edge portion of the second shaping row. In this way, the concave arc serrated portion and the cutout portion that are offset from each other can be formed on at least two threads.

Wherein, the first shaping row and the second shaping row are respectively located in adjacent shaping grooves. In this way, several concave arc serrations and several notches can be formed on each of at least two adjacent threads.

The screw thread forming parts of the first die plate and the second die plate respectively have a plurality of arc grooves extending in the up and down direction, and the extending directions of the plurality of arc grooves are consistent with the first die plate and the second die plate. The plurality of forming grooves of the second die plate are staggered, and the plurality of arc grooves are recessed on the surfaces of the first die plate and the second die plate outside the forming grooves. In this way, several arc-shaped protruding ribs can be formed on the bottoms of several threads of the screw. The several arc-shaped protruding ribs can reduce the resistance when the screw penetrates into the wooden workpiece, thereby allowing the screw to penetrate into the workpiece smoothly. effect.

Wherein, the shaping part is located on the surface of a tooth module, the first tooth plate has a coupling groove, the coupling groove is connected to the screw molding part, and the tooth module is detachably located in the coupling groove. In this way, the tooth module can be replaced according to different needs, which can achieve the effect of convenient processing.

Wherein, the plurality of concave arc serrated portions and the plurality of cutout portions on a thread of the screw are arranged at intervals from each other. In this way, the concave arc serrated portion and the notch portion can cooperate to reduce the drilling resistance of the screw, which has the effect of allowing the screw to smoothly penetrate the workpiece.

Wherein, at least two screw threads of the screw each have a plurality of concave arc serrated portions and a plurality of cutout portions on the periphery thereof, and the plurality of concave arc serrated portions and a plurality of cutout portions of the two screw threads are offset from each other. In this way, the plurality of offset concave arc serrated portions and the plurality of notch portions can further reduce the drilling resistance, and have the effect of allowing the screw to smoothly penetrate the workpiece.

In order to make the above and other objects, features and advantages of the present invention more obvious and understandable, preferred embodiments of the present invention are illustrated below and described in detail with reference to the accompanying drawings; in addition, the same symbols are used in different drawings. are considered to be the same and their description will be omitted.

Please refer to Figures 1, 2 and 3, which is the first embodiment of the screw die plate assembly of the present invention. It includes a first die plate 1 and a second die plate 2. The first die plate 1 and The second die plate 2 is used to jointly clamp a rod 3 on a tooth rolling machine (not shown). The first die plate 1 and the second die plate 2 move relatively parallel, thereby driving the While the rod 3 is rolling, the circumferential surface of the rod 3 is rolled to form a screw with several threads 31 . In this embodiment, the first die plate 1 is fixed and the second die plate 2 moves in parallel with the first die plate 1 . However, the second die plate 2 may also move parallel to the first die plate 1, which is not limited by the present invention.

Please continue to refer to Figures 1 and 2. The first die plate 1 has an opposite inlet end 1a and a discharge end 1b. The first die plate 1 is located between the inlet end 1a and the outlet end 1b. There is a thread forming part 11 on a surface between them. The thread forming part 11 has a plurality of forming grooves 12. The plurality of forming grooves 12 extend from the inlet end 1a to the discharge end 1b. The forming grooves 12 are inclined from the inlet end 1a toward the discharge end 1b, and the plurality of forming grooves 12 are arranged side by side at equal intervals. In this way, the thread forming portion 11 can be used to form a plurality of threads 31 spirally surrounding the circumferential surface of the rod body 3 .

The thread forming part 11 may have a plurality of anti-slip grooves 13 , and the plurality of anti-slip grooves 13 may be disposed at equal intervals on the surface of the first die plate 1 having the plurality of forming grooves 12 , and the plurality of anti-slip grooves 13 The extension direction of the anti-slip grooves 13 intersects with the extension directions of the plurality of forming grooves 12, and the interleaving can be perpendicular or non-perpendicular. In this embodiment, the extending directions of the plurality of anti-slip grooves 13 are non-perpendicularly intersecting with the extending directions of the plurality of forming grooves 12. The plurality of anti-slip grooves 13 can be directed from the feed end 1a toward the The discharge ends 1b are arranged side by side. In this way, the plurality of anti-slip grooves 13 can form a friction force for the rod body 3. When the rod body 3 is rolled, it can be ensured that the rod body 3 is formed by the first The feed end 1a of the die plate 1 rolls toward the discharge end 1b.

Please continue to refer to Figures 2, 3, and 4. The surface between the inlet end 1a and the discharge end 1b of the first die plate 1 also has a tip molding part 14. The tip molding part 14 is made of The lower end of the rod body 3 is gradually reduced in diameter to form a tapered screw tapping end. The tip molding portion 14 is adjacent to the bottom of the thread molding portion 11 , and the tip molding portion 14 is smaller than the screw thread molding portion. 11 protrudes from the surface of the first die plate 1 , and the tip molding part 14 gradually bulges from the inlet end 1a toward the discharge end 1b , so that the tip molding part 14 is formed relative to the thread molding part 11 A first included angle θ1 (as shown in Figure 3), and the tip forming part 14 and the thread forming part 11 are inclined at a second included angle θ2 (as shown in Figure 4). In this way, the tip forming portion 14 can gradually reduce the diameter of one end of the rod body 3 to form a pointed cone shape, that is, the rod body 3 can be formed with a tapping end of the screw. In addition, the tip molding portion 14 can also have a plurality of anti-slip grooves 13 to form frictional force on the rod body 3 adjacent to the end position, so that the rod body 3 can roll easily.

Please refer to FIG. 2 , the first die plate 1 has a chip discharge groove 15 , the chip discharge groove 15 is located below the tip forming part 14 , and the chip discharge groove 15 is adjacent to the tip forming part 14 . Specifically, the chip removal groove 15 is recessed on the surface of the first die plate 1 relative to the tip molding part 14, so that the scrap material of the rod body 3 rubbed by the tip molding part 14 can enter the row. Chip flute 15.

Please refer to Figures 1 and 2, the first die plate 1 has a molded portion 16, and the molded portion 16 is shaped into a sawtooth shape by tapping the thread of a screw into the end. The molding part 16 is located on the extension path of the at least one molding groove 12. Preferably, the molding part 16 can be located adjacent to the discharge end 1b of the first die plate 1, so that through the molding part 16 The formed screw thread 31 is then formed into saw teeth.

Please refer to Figures 5 and 6. Specifically, the shaping portion 16 includes a plurality of convex arc tooth portions 161 and a plurality of V-shaped cutting edge portions 162 arranged at intervals. Each of the convex arc tooth portions 161 has a plurality of V-shaped cutting edge portions 162. The tooth peaks 161a can extend parallel to each other. On the cross section of the convex arc tooth portion 161, the tooth peaks 161a can be located on a virtual arc T1. In this way, the convex arc tooth portion 161 can be used to form a concave arc serration on the periphery of at least one screw thread 31 . Each V-shaped cutting edge portion 162 has a plurality of edge peaks 162a, and each of the edge peaks 162a can extend parallel to each other. In this way, the V-shaped cutting edge portion 162 can be used to form a plurality of V-shaped notches corresponding to the periphery of at least one screw thread 31. On the cross-section of the V-shaped cutting edge portion 162, the plurality of blade peaks 162a can be located at A virtual horizontal line T2, in this way, the V-shaped cutting edge portion 162 can form a V-shaped cut with a uniform depth on the periphery of the screw thread 31. Preferably, in the cross section of the shaping portion 16, the blade peaks 162a can be lower than the tooth peaks 161a (as shown in Figure 6), so that each tooth peak of the convex arc tooth portion 161 161a can protrude relative to the plurality of blade peaks 162a, so that the convex arc tooth portion 161 can reliably form several concave arcs on the periphery of the screw thread 31.

The extending direction of each tooth peak 161 a and each blade peak 162 a intersects with the extending direction of the plurality of molding grooves 12 . In this way, at least one thread 31 for shaping the plurality of molding grooves 12 can continuously pass through the molding portion 16 , so that the plurality of convex arc tooth portions 161 and the plurality of V-shaped cutting edge portions 162 can shape the formed grooves 12 . The periphery of screw thread 31 is shaped. In addition, the ratio of the number of the tooth peaks 161a of the convex arc tooth portion 161 to the number of the blade peaks 162a of the V-shaped cutting edge portion 162 can be 2:1˜3:1. That is, the convex arc tooth portion 161 may have relatively dense tooth peaks 161a to form a continuous sawtooth shape around the periphery of the screw thread 31 . However, the V-shaped cutting edge portion 162 may have relatively sparse blade peaks 162a to form several unconnected V-shaped cuts on the periphery of the screw thread 31 . In this way, the molding part 16 can be used to shape at least one screw thread 31 into a plurality of concave arc serrations and a plurality of V-shaped incisions (as shown in Figure 8), so that the plurality of concave arc serrations and a plurality of V-shaped notches are formed. The profiled notch can be used to quickly cut the workpiece to reduce the tapping resistance of the screw. And, when the present invention is used on a wooden workpiece, the concave arc saw teeth can be used to cut the wood fibers wrapped around the screws to reduce the resistance of the V-shaped incisions in cutting the fibers.

Please continue to refer to Figures 5, 6 and 7. The present invention does not limit the arrangement order of the plurality of convex arc tooth portions 161 and the plurality of V-shaped cutting edge portions 162. For example, in one embodiment, the plurality of convex arc tooth portions 161 and the plurality of V-shaped cutting edge portions 162 are The convex arc tooth portion 161 and the plurality of V-shaped cutting edge portions 162 can be arranged at intervals from each other. In this embodiment, the shaping portion 16 can sequentially form a V-shaped cutting edge portion 162, a convex arc tooth portion 161, a V-shaped cutting edge portion 162, and a convex arc from the inlet end 1a toward the outlet end 1b. The teeth 161 are arranged in a staggered manner. In addition, the number of the plurality of convex arc tooth portions 161 and the number of the plurality of V-shaped cutting edge portions 162 can be the same. In this way, the array of concave arc serrations formed by the plurality of convex arc tooth portions 161 on the screw thread can be Distributed geometrically symmetrically in the radial direction (as shown in Figure 7).

In addition, the total length after the plurality of convex arc tooth portions 161 and the plurality of V-shaped cutting edge portions 162 are spaced apart from each other corresponds to the length of one revolution of the screw thread around the rod body 3 . That is, when the rod body 3 rolls for one revolution, the molding portion 16 can just shape one round of threads on the rod body 3 . In addition, the extension length of each tooth peak 161a and each blade peak 162a can correspond to the number of threads 31 to be shaped on the rod body 3, so as to shape a plurality of threads 31. The invention is not limited.

The molding part 16 can be integrally formed on the surface of the first tooth plate 1 , or, in this embodiment, the molding part 16 is located on the surface of a tooth module H. The first tooth plate 1 has a coupling groove 17 , the coupling groove 17 may be a through groove, and the coupling groove 17 communicates with the thread forming part 11 . The tooth module H is detachably located in the coupling groove 17 . In this way, when the molding part 16 is worn, the tooth module H can be directly removed to replace the molding part 16 without replacing the entire first tooth plate 1 , which can save costs.

Please continue to refer to Figure 1. A surface of the second die plate 2 has a thread forming part 21. The thread forming part 21 of the second die plate 2 is different from the thread forming part 21 of the first die plate 1. The parts 11 jointly clamp the rod body 3 to roll and shape the circumferential surface of the rod body 3. The screw thread forming part 21 has a plurality of forming grooves 22 . The plurality of forming grooves 22 extend side by side at equal intervals. The slope of the plurality of forming grooves 22 is consistent with the slope of the plurality of forming grooves 12 of the first die plate 1 . The same, and the inclination direction is opposite, so as to form helically surrounding threads on the circumferential surface of the rod body 3, as can be understood by those in the art, and the present invention will not be described in detail here. In addition, the thread forming part 21 may also have a plurality of anti-slip grooves 23, the extending directions of the plurality of anti-slip threads 23 intersect with the extending directions of the forming grooves 22, and the thread forming part 21 may also have It has a tip forming part 24 and a chip discharge groove 25 . The tip forming part 24 and the chip discharge groove 25 are opposite to the tip forming part 14 and the chip discharge groove 15 of the first die plate 1 .

Please continue to refer to Figure 7. When forming a screw using the screw die plate, the rod body 3 enters from the feed end 1a and is clamped between the first die plate 1 and the second die plate 2. The rod body 3 may have a pre-formed cap head. The second die plate 2 moves parallel to the first die plate 1 to drive the rod body 3 to roll from the inlet end 1a to the discharge end 1b, and the thread forming parts 11 and 21 move the rod body 3 The number of screw threads 31 are rolled out from the circumferential surface of 3. The residual chips and escaped materials during the kneading process can be discharged from the chip discharge grooves 15 and 25. When the rod body 3 rolls to the shaping part 16, the plurality of convex arc tooth parts 161 and the plurality of V-shaped cutting edge parts 162 of the shaping part 16 sequentially align at least one thread 31 Several concave arc serrations and several V-shaped cuts are formed on the periphery of the rod 3, and the rod body 3 is separated from the discharging end 1b to be formed into a screw.

Please continue to refer to Figure 8, which is a screw 4 formed by the screw die set of the present invention. It includes a rod body 41 and a plurality of threads 42, and the plurality of screw threads 42 are connected to the rod. body 41 to form threads. At least one screw thread 42 has a plurality of concave arc serrated portions 43 and a plurality of cutout portions 44 located on the periphery of the at least one screw thread 42 . On a screw thread 42, the plurality of concave arc serrated portions 43 and the plurality of cutout portions 44 can be arranged at intervals from each other, so that the plurality of concave arc serrated portions 43 are geometrically symmetrically distributed in the radial direction (as shown in Figure 7 shown). In this way, when the screw 4 is screwed into a workpiece such as wood, it can maintain a predetermined screwing angle and has good stability. In this embodiment, the second and third threads 42 starting from the tapping end 41a of the screw 4 each have the plurality of concave arc serrated portions 43 and the plurality of cutout portions 44. In addition, the concave arc serrated portions 43 of the two adjacent screw threads 42 can be positioned relative to each other, so that when the screw 4 is initially driven into a workpiece such as wood, the resistance can be reduced to smoothly drive the subsequent threads 42 to be screwed in.

Please refer to Figure 9, which is the second embodiment of the screw die plate assembly of the present invention. This embodiment is roughly the same as the first embodiment mentioned above. In this embodiment, the first die plate 1 has a The width of the molding portion 18 is larger than the width of the molding portion 16 in the first embodiment, so that the molding portion 18 can at least be aligned with the extension path of the two molding grooves 12 . Specifically, the molding part 18 has at least a first molding row 18a and a second molding row 18b. The first molding row 18a and the second molding row 18b are each aligned with at least one molding groove 12. , the forming grooves 12 aligned with the first shaping row 18a and the second shaping row 18b can be adjacent, so that the shaping part 18 can shape at least two adjacent screw threads 31.

Please refer to Figures 11 and 12, the first shaping row 18a and the second shaping row 18b respectively have a plurality of convex arc tooth portions 181 and a plurality of V-shaped cutting edge portions 182 arranged at intervals, that is, , the convex arc tooth portion 181 and the V-shaped cutting edge portion 182 of the first shaping row 18a are respectively offset from the convex arc tooth portion 181 and the V-shaped cutting edge portion 182 of the second shaping row 18b. In this way, the first shaping row 18a and the second shaping row 18b can be used to shape at least two screw threads 31 to form a plurality of concave arc serrations and a plurality of V-shaped incisions that are offset, so that the attack force can be further reduced. Drilling resistance to drill into the workpiece smoothly. In addition, the molded portion 18 can also be located on the surface of the tooth module H, and the tooth module H is detachably located in the coupling groove 17 so that the molded portion 18 can be replaced after wear. In addition, in another embodiment, the shaping part 18 may have more than three shaping rows, so that different screw threads can be shaped by each shaping row, which is not limited by the present invention.

Continuing to refer to Figures 9 and 10, in addition, the thread forming portions 11 and 21 of the first die plate 1 and the second die plate 2 can respectively have an upward and downward direction (perpendicular to the material inlet end 1a to the discharge end). several arc grooves 19, 26 extending in the direction of end 1b). That is, the extending directions of the plurality of arc grooves 19 and 26 intersect with the extending directions of the plurality of forming grooves 12 , and the interlacing may be perpendicular or non-perpendicular to each other. Taking the first die plate 1 as an example, the plurality of arc grooves 19 can be recessed on the surface between the two forming grooves 12 of the first die plate 1 , that is, corresponding to the position of the bottom of the forming screw (such as 10), in this way, it will not affect the shaping of the thread 31 by the forming groove 12, and the surface of the first die plate 1 is separated between two adjacent arc grooves 19. In this way, the plurality of arcuate grooves 19 can form a plurality of arcuate ribs 55 at the bottom between the two threads 31 of the rod body 3 (as shown in Figure 13). The plurality of arc grooves 19 can be provided from the inlet end 1a to the outlet end 1b.

Please continue to refer to Figure 13, which is a screw 5 formed by a screw die set according to the second embodiment of the present invention. It includes a rod body 51 and a plurality of screw threads 52, and the plurality of screw threads 52 are connected to each other. Wrap around the rod body 51 to form threads. At least two screw threads 52 each have a plurality of concave arc serrated portions 53 and a plurality of cutout portions 54 , and the plurality of concave arc serrated portions 53 and a plurality of cutout portions 54 of the two screw threads 52 are offset from each other. In this way, when the screw 5 is driven into a workpiece such as wood, the resistance can be reduced, so that the screw 5 can be smoothly screwed into the workpiece such as wood. In addition, there may be a plurality of axially extending arcuate ribs 55 at the bottoms of the threads 52 , and a chip-containing groove 56 may be arranged between adjacent arcuate ribs 55 . In this way, the plurality of arcuate ribs 55 can reduce the resistance when the screw 5 is locked into a workpiece such as wood, and the chip-containing groove 56 can accommodate debris from the workpiece such as wood, thereby enabling smooth drilling into the workpiece. effect.

It is worth mentioning that the plurality of arc grooves 19 disclosed in the second embodiment can also be provided in the first die plate 1 and the second die plate 2 in the first embodiment. In other words, the screw 4 formed by the first die plate 1 and the second die plate 2 disclosed in the first embodiment can also have a plurality of axially extending arc protrusions at the bottom of the threads 42 . ribs, so it is not limited to the types disclosed in the drawings of each embodiment.

To sum up, in the screw die plate set of the present invention, the first die plate has the shaping part, and the shaping part has several convex arc tooth parts arranged at intervals on the extension path of at least one shaping groove. and several V-shaped cutting edge portions. In this way, when the rod body is formed into threads by the first die plate and the second die plate, several concave arcs can be molded on the threads at the same time. serrations and several V-shaped notches. This allows screws with concave arc serrations and several V-shaped notches to be formed in one go. There is no need for secondary processing to mill the V-shaped grooves, which can achieve better production efficiency. .

In addition, the molded portion may be located on the tooth module so as to be detachably coupled to the coupling groove of the first tooth plate through the tooth module. In this way, according to the distribution pattern of the screw threads to be formed, the molded screws can be in relative position or offset at the concave arc serrations of the two adjacent screw teeth, and the tooth module can be replaced according to different needs, which can be convenient. Processing effectiveness.

In addition, the screw can cut workpieces such as wood through the plurality of concave arc serrations and the plurality of V-shaped incisions, thereby reducing the tapping resistance of the screw. Moreover, the plurality of concave arc saw teeth can cut off the wood fibers wrapped around the screws, thereby reducing the cutting resistance of the plurality of V-shaped incisions to achieve the effect of smoothly drilling into the workpiece.

Although the present invention has been disclosed using the above-mentioned preferred embodiments, they are not intended to limit the invention. Anyone skilled in the art can make various changes and modifications to the above-described embodiments without departing from the spirit and scope of the invention. The technical scope protected by the invention, therefore, the protection scope of the invention shall include all changes within the literal and equivalent scope described in the appended patent application scope. Furthermore, when several of the above-mentioned embodiments can be combined, the present invention includes any combination of implementations.

1: First die plate 1a: Feed end 1b: Discharge end 11,21: Thread forming department 12,22: Forming groove 13,23: Anti-slip pattern 14,24: Tip molding part 15,25: Chip flute 16,18:Sculpting Department 161,181: convex arc tooth part 161a:Tooth peak 162,182: V-shaped cutting edge 162a:Blade Peak 17:Combining slot 18a: First shaping row 18b: Second shaping row 19,26: Arc groove 2:Second die plate 3: Rod body 31: screw thread 4,5:Screw 41,51: rod body 41a: Attack end 42,52: screw thread 43,53: Concave arc sawtooth part 44,54: Incision part 55:Arc convex rib 56: Chip holding groove T1: arc T2: Horizontal line H:Tooth module θ1: the first included angle θ2: The second included angle

[Picture 1] An exploded perspective view of the screw die plate assembly according to the first embodiment of the present invention. [Figure 2] A view of the first dental plate according to the first embodiment of the present invention. [Figure 3] Side view of the first die plate according to the first embodiment of the present invention. [Picture 4] Sectional view along line A-A in Picture 2. [Figure 5] A perspective view of the molding part of the first embodiment of the present invention. [Picture 6] Sectional view along line B-B in Figure 5. [Figure 7] A schematic diagram of screw thread shaping by the screw thread rubbing plate set according to the first embodiment of the present invention. [Figure 8] A partial enlarged view of a screw assembled with a screw die plate according to the first embodiment of the present invention. [Figure 9] An exploded perspective view of the screw die plate assembly according to the second embodiment of the present invention. [Picture 10] Partial enlargement of Figure 9C. [Figure 11] A perspective view of the molding part of the second embodiment of the present invention. [Figure 12] Cross-sectional view along line D-D in Figure 11. [Figure 13] A partial enlarged view of a screw assembled with a screw die plate according to the second embodiment of the present invention.

1: First die plate

1a: Feed end

1b: Discharge end

11,21: Thread forming department

12,22: Forming groove

13,23: Anti-slip pattern

14,24: Tip molding part

15,25: Chip flute

16:Plastic Department

17:Combining slot

2:Second die plate

H:Tooth module

Claims (24)

A screw die plate set, including: A first die plate, a surface of the first die plate has a thread forming part, the thread forming part has a plurality of forming grooves, the first die plate has a tip molding located below the thread forming part part, the first die plate has a shaping part, the shaping part is located on the extension path of at least one shaping groove, the shaping part includes a plurality of convex arc tooth parts and a plurality of V-shaped cutting edge parts, each of the convex The arc tooth portion has a plurality of tooth peaks, each of the V-shaped cutting edge portions has a plurality of blade peaks, and each of the tooth peaks and each of the blade peaks intersect with the extending direction of the at least one forming groove; and a second die plate. A surface of the second die plate has a thread forming part and a tip forming part corresponding to the first die plate. The first die plate and the second die plate can move relatively parallel, Several threads are formed on a rod body used for joint clamping. Such as the screw die plate set of claim 1, wherein several tooth peaks of each convex arc tooth portion extend parallel to each other. Such as the screw die plate set of claim 1, wherein several blade peaks of each V-shaped cutting edge extend parallel to each other. The screw die plate set of claim 1, wherein the plurality of convex arc tooth portions and the plurality of V-shaped cutting edge portions are spaced apart from each other. The screw die plate set of claim 1, wherein on the cross section of the convex arc tooth portion, the several tooth peaks are located on a virtual arc. For example, the screw die plate set of claim 1, wherein on the cross section of the V-shaped cutting edge, the plurality of edge peaks are located on a virtual horizontal line. The screw die plate set of claim 1, wherein in the cross-section of the shaping part, the blade peaks are lower than the tooth peaks. The screw die set of claim 1, wherein the shaping part has at least a first shaping row and a second shaping row, and the first shaping row and the second shaping row each at least align In one of the shaping grooves, the first shaping row and the second shaping row respectively have a plurality of convex arc tooth portions and a plurality of V-shaped cutting edge portions spaced apart from each other. The screw die set of claim 8, wherein the convex arc tooth portion and the V-shaped cutting edge portion of the first shaping row are respectively formed with the convex arc tooth portion and the V-shaped cutting edge portion of the second shaping row. Dislocation. The screw die plate set of claim 8, wherein the first shaping row and the second shaping row are respectively located in adjacent shaping grooves. The screw die plate set of claim 1, wherein the screw thread forming parts of the first die plate and the second die plate respectively have a plurality of arc grooves extending in the up and down direction, and the plurality of arc grooves The extending direction intersects with the plurality of forming grooves of the first die plate and the second die plate, and the plurality of arc grooves are recessed in the first die plate and the second die plate outside the forming grooves. the surface of the board. The screw die plate set of claim 1, wherein the shaping part is located on the surface of a tooth module, the first die plate has a coupling groove, the coupling groove is connected to the thread molding part, and the tooth module is detachable. The ground is located in the coupling groove. A tooth module. A surface of the tooth module has a shaping part. The shaping part includes several convex arc tooth parts and several V-shaped cutting edge parts. Each of the convex arc tooth parts has several tooth peaks. The V-shaped cutting edge has several edge peaks. The tooth module of claim 13, wherein several tooth peaks of each convex arc tooth portion extend parallel to each other. Such as the tooth module of claim 13, wherein several edge peaks of each V-shaped cutting edge portion extend parallel to each other. The tooth module of claim 13, wherein the plurality of convex arc tooth portions and the plurality of V-shaped cutting edge portions are spaced apart from each other. The tooth module of claim 13, wherein on the cross section of the convex arc tooth portion, the plurality of tooth peaks are located on a virtual arc. The tooth module of claim 13, wherein, in the cross section of the V-shaped cutting edge portion, the plurality of edge peaks are located on a virtual horizontal line. The tooth module of claim 13, wherein in the cross-section of the shaping portion, the blade peaks are lower than the tooth peaks. The tooth module of claim 13, wherein the shaping part has at least a first shaping row and a second shaping row, and the first shaping row and the second shaping row respectively have mutually spaced rows. The plurality of convex arc tooth portions and the plurality of V-shaped cutting edge portions. The tooth module of claim 20, wherein the convex arc tooth portion and the V-shaped cutting edge portion of the first shaping row are respectively offset from the convex arc tooth portion and the V-shaped cutting edge portion of the second shaping row. A screw containing: a rod; and Several screw threads are connected and wound around the rod body to form threads. The periphery of at least one screw thread has a plurality of concave arc sawtooth portions and a plurality of cutout portions. The screw of claim 22, wherein the plurality of concave arc serrated portions and the plurality of cutout portions on a screw thread are arranged at intervals from each other. The screw of claim 22, wherein the peripheral edges of at least two screw threads each have a plurality of concave arc serrated portions and a plurality of cutout portions, and the plurality of concave arc serrated portions and a plurality of cutout portions of the two screw threads are offset from each other.

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