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CN-224222626-U - Thread rolling plate for cracking-proof screw

CN224222626UCN 224222626 UCN224222626 UCN 224222626UCN-224222626-U

Abstract

A thread rolling plate for a cracking-proof screw comprises a main thread rolling plate and an auxiliary thread rolling plate. The tooth twisting device comprises a main tooth plate and an auxiliary tooth plate, wherein tooth twisting parts and forming parts are arranged on the main tooth plate and the auxiliary tooth plate, and the tooth twisting parts are provided with a feeding part, a shaping part and a discharging part. The auxiliary dental plate is provided with a feeding part and a shaping part. The feeding part, the shaping part and the discharging part are provided with tooth rubbing edges, and the shaping part comprises a positioning groove and shaping edges. The molding edges are arranged between every two tooth rubbing edges. The molding edge comprises a molding block and a molding groove. The molding parts are respectively arranged on the main dental plate and the auxiliary dental plate. The positioning groove is arranged on the forming part to ensure that the screw rod cannot incline during tooth twisting. The free end of the forming block is arc-shaped and protruding, a chip removing part with a sunken middle area can be formed on the surface of the screw rod during tooth twisting, waste chips can be filled during screwing, an expansion space is reserved, stress of the plate can be released, and the plate is prevented from cracking.

Inventors

  • CHEN JISHENG

Assignees

  • 台牙牙板模具(嘉兴)有限公司

Dates

Publication Date
20260512
Application Date
20250527

Claims (7)

  1. 1. A tooth rubbing plate for an anti-cracking screw is characterized by comprising a main tooth rubbing plate and an auxiliary tooth rubbing plate, wherein the opposite end faces of the main tooth rubbing plate and the auxiliary tooth rubbing plate are respectively provided with a tooth rubbing part and a forming part arranged on the tooth rubbing parts, the tooth rubbing parts are sequentially provided with a feeding part, a shaping part and a discharging part along one end of the length direction of the main tooth rubbing plate, the auxiliary tooth rubbing plate is provided with a feeding part and a shaping part, the feeding part, the shaping part and the discharging part are respectively provided with a plurality of tooth rubbing edges in an inclined mode, the shaping part comprises a plurality of positioning grooves which are vertically arranged at one end of the shaping part far away from the discharging part, and a plurality of forming edges which are obliquely arranged on the shaping part, one forming edge is arranged between every two tooth rubbing edges, the forming edges comprise a plurality of forming blocks, and a plurality of forming grooves which are arranged between two adjacent forming blocks are gradually increased in size along the shaping part.
  2. 2. The method of claim 1, wherein the primary dental plate and the secondary dental plate are rectangular blocks and the primary dental plate has a length less than the secondary dental plate.
  3. 3. The thread rolling plate of the cracking-preventing screw according to claim 1, wherein the cross section of the thread rolling ridges on the feeding part is triangular.
  4. 4. The thread rolling die of the cracking-proof screw as claimed in claim 1, wherein the cross section of the thread rolling ridges on the middle area of the discharging part and the shaping part is trapezoid.
  5. 5. The thread rolling plate of the cracking prevention screw as claimed in claim 1, wherein the thread rolling edges have an included angle of 15 degrees with the length sides of the main thread rolling plate and the auxiliary thread rolling plate.
  6. 6. The thread rolling plate of the cracking-proof screw of claim 1, wherein the feeding part and the shaping part are provided with positioning grooves on thread rolling edges near one side of the feeding part.
  7. 7. The threading plate of the cracking-preventing screw of claim 1, wherein an inclined angle of 10 degrees is arranged at one end of the discharging part far away from the shaping part.

Description

Thread rolling plate for cracking-proof screw Technical Field The utility model relates to the technical field of screw production dies, in particular to a thread rolling plate for cracking-proof screws. Background The screw plate, two square templates used on the screw machine, is divided into two, one is long and one is short, and the screw plate is a die for extruding and forming screw threads on screw light nails, and is the most commonly used thread tool for processing screws and bolts in the standard fastener industry. Commonly used screw dies are generally capable of simultaneously processing threads of one specification. With the improvement of the assembly process, the specification of the screw is also improved. The screw is required to have other functions such as chip removal, cracking prevention, etc. when the screw is required to have a fastening effect. The additional action needs to add a structure on the screw teeth to achieve the effects of chip removal, cracking prevention and the like, the existing production process needs to rub screw teeth with one specification on the screw blanks, other structures need to be processed secondarily by processing staff depending on equipment, the operation difficulty is high, the defective rate is high, and the production efficiency is low. Disclosure of Invention In view of the above, the present utility model provides a thread rolling plate for a cracking-proof screw to solve the above-mentioned technical problems. A thread rolling plate for a cracking-proof screw comprises a main thread rolling plate and an auxiliary thread rolling plate. The tooth rolling device comprises a main tooth plate and an auxiliary tooth plate, wherein the opposite end surfaces of the main tooth plate and the auxiliary tooth plate are respectively provided with a tooth rolling part and a forming part arranged on the tooth rolling parts, and one end of the tooth rolling part in the length direction of the main tooth plate is sequentially provided with a feeding part, a forming part and a discharging part. The auxiliary dental plate is provided with a feeding part and a shaping part. The feeding part, the shaping part and the discharging part are all obliquely provided with a plurality of tooth rubbing edges, and the shaping part comprises a plurality of positioning grooves which are vertically arranged at one end of the shaping part far away from the discharging part, and a plurality of shaping edges which are obliquely arranged on the shaping part. One molding edge is arranged between every two tooth rubbing edges. The molding rib includes a plurality of molding blocks and a plurality of molding grooves disposed between two adjacent molding blocks. The size of the molding block gradually increases along the direction from the discharging part to the shaping part. Further, the primary dental plate and the secondary dental plate are both rectangular and block-shaped and the length of the primary dental plate is less than the length of the secondary dental plate. Further, the cross section of the thread rolling edges on the feeding part is triangular. Further, the cross sections of the tooth rubbing edges on the middle areas of the discharging part and the shaping part are trapezoid. Further, the tooth rubbing edges and the length side edges of the main tooth plate and the auxiliary tooth plate form an included angle of 15 degrees. Furthermore, positioning grooves are formed in the tooth rubbing edges of the feeding portion and the shaping portion, which are close to one side of the feeding portion. Further, one end of the discharging part far away from the shaping part is provided with a 10-degree inclined angle. Compared with the prior art, the thread rolling plate for the cracking-preventing screw is characterized in that the forming parts are respectively arranged on the main thread rolling plate and the auxiliary thread rolling plate. The positioning groove is arranged on the shaping part to ensure that the screw rod cannot incline during tooth twisting, and the shaping ribs are obliquely arranged on the shaping part. The molding rib includes a plurality of molding blocks and a plurality of molding grooves disposed between two adjacent molding blocks. The free end of each forming block is arc-shaped and protruding, a plurality of chip removal portions with sunken middle areas can be formed on the surface of the screw rod during tooth twisting, and the chip removal portions can be filled through scraps during screwing, and a part of expansion space is reserved, so that the stress of the plate can be released, and the plate is prevented from cracking. And the tooth rolling machine can be directly used after tooth rolling, does not need subsequent processing, has low tooth rolling error, reduces defective rate and improves production efficiency. Drawings Fig. 1 is a schematic structural view of a thread rolling plate for a cracking-preventing screw. Fig. 2 is an enlarged par