CN201015808Y - Screw die set - Google Patents

Abstract

The utility model discloses a screw thread plate group, which is composed of two corresponding thread plates. A plurality of forming grooves and anti-slip grooves are formed on each thread plate. At the same time, a side edge of each thread plate protrudes with an inclined portion, and the forming groove extends to the inclined portion. The bottom of the forming groove adjacent to the inclined portion is a plane, and the depth of the forming groove on the inclined portion is only less than 90% of the depth of the forming groove on the non-inclined portion. The two thread plates are rolled against each other to form a screw thread on the screw with an initial flat screw peak connected to a pointed screw tooth peak for locking use, and the screw locking process is more labor-saving and fast.

Description

Screw die set

technical field

The utility model relates to a tooth rubbing plate design, in particular to a screw tooth plate set installed in a thread rubbing machine to process a metal rod body to form a special thread structure design.

Background technique

At present, the manufacturing and molding of general screws mainly adopts cold forging to form the rod body of the head, and then uses a thread rolling machine (not shown in the figure) to install a screw die set composed of two corresponding die plates. The corresponding tooth plates are rolled against each other to form threads on the outer surface of the rod.

Check, the structure of the existing screw tooth plate group 1, as shown in Figure 1, it is composed of two corresponding tooth plates 11, each of the tooth plates 11 includes a body 110, and a plurality of parts formed on the body 110 Forming grooves 111; wherein, each forming groove 111 of the body 110 is arranged in parallel, and the bottom of each forming groove 111 exists in a pointed angle θ, so that each screw tooth 2 formed by rubbing is in the shape of Pointed crests; however, this formed thread 2 design does not meet the creator's needs, so further research and development is required to create the required screw thread plate set.

Utility model content

The purpose of this utility model is to provide a screw tooth plate set, which uses two corresponding tooth plates to protrude an inclined part, and the bottom of the forming groove on the inclined part is designed in a plane. The outer peripheral surfaces of the rods are rolled together to form different screw product designs for use.

In order to achieve the above object, the technical solution of the present utility model is: a screw tooth plate set, which is composed of two corresponding tooth plates, each tooth plate includes a body, and a plurality of forming grooves formed on the body , the body has an inlet end and an outlet end located in the opposite direction of the inlet end, and each of the aforementioned forming grooves is arranged in parallel from the inlet end to the outlet end, and at the same time, on the forming groove adjacent to the inlet end A plurality of anti-slip grooves are formed, and a rubbing knife edge is formed at the junction of the forming groove and the anti-slip groove; one end edge of each tooth plate protrudes from an inclined portion, and the forming groove extends to the inclined portion, and at the same time The inclined parts on the two dental plates are arranged correspondingly, and adjacent to the forming groove on the inclined part of the outlet end, it has a bottom wall and a side wall extending upward from the bottom, and the depth of the forming groove on the inclined part is It is only less than 90% of the depth of the molding groove on the body.

The distance between the two side walls of the forming groove on each inclined portion is wider than the width of the bottom wall.

The bottom wall can be a plane or an arc surface.

After adopting the above scheme, since the utility model is provided with corresponding inclined parts on the two dental plates, and a forming groove is arranged on the inclined parts, and the forming groove depth on the inclined part is deeper than the forming groove depth on the body. It is shallow, with the help of mutual rolling of two tooth plates to form the thread on the screw, and the initial flat thread crest connects with the pointed thread crest, so that when the screw product is used, the screw locking process has a More labor-saving, fast and other effects.

Description of drawings

Fig. 1 is a schematic diagram of the mutual rolling state of existing screw tooth plate groups;

Fig. 2 is a three-dimensional schematic diagram of a screw die set in a preferred embodiment of the present invention;

Fig. 3 is a schematic cross-sectional view of each tooth plate in a preferred embodiment of the present invention;

Fig. 4 is a schematic cross-sectional view of each tooth plate in another preferred embodiment of the utility model;

Fig. 5 is a schematic diagram of the mutual rolling state of two tooth plates in a preferred embodiment of the present invention;

Fig. 6 is a schematic diagram of a screw formed by rolling in a preferred embodiment of the present invention.

The main components of the diagram represent symbols

4 screw tooth plate set 3 tooth plate 31 body

32 forming groove 33 anti-slip groove 34 tooth rubbing edge

35 inclined part 311 inlet port 312 outlet port

321 bottom wall 322 side wall h depth

h’depth w’spacing w’spacing

5 metal rod body 52 thread 521 top surface

Detailed ways

The foregoing and other technical contents, features and effects of the present invention will be clearly understood in the following detailed description of preferred embodiments with reference to the drawings.

Referring to Fig. 2, the threaded die set 4 in this embodiment is composed of two corresponding dies 3, each of which includes a body 31, and a plurality of forming grooves 32 formed on the body 31; Wherein, the body 31 has an inlet end 311 and an outlet end 312 located in the opposite direction of the inlet end 311, and each of the above-mentioned forming grooves 32 is arranged in parallel from the inlet end 311 to the outlet end 312, and is adjacent to A plurality of anti-slip grooves 33 are formed on the forming groove 32 at the inlet end 311 , so that a rubbing knife edge 34 is formed at the junction of the forming grooves 32 and the anti-slip grooves 33 .

Referring to Figures 2 and 3, an inclined portion 35 protrudes from the lower edge of the side edge of each tooth plate 3, and the forming groove 32 extends to the inclined portion 35, and the inclined portion on the two tooth plates 3 35 is correspondingly arranged, and the forming groove 32 on the inclined portion 35 adjacent to the outlet end 312 has a bottom wall 321 and a side wall 322 extending upward from the bottom 321, and the aforementioned bottom wall 321 can be a Plane, or the arc surface as shown in Figure 4, for the convenience of the following action description, the bottom wall 321 is expressed as a plane, in addition, the distance w' between the two side walls 322 is wider than the width w of the bottom, so that this Embodiment The cross-section of the forming groove 32 is trapezoidal design, moreover, the depth h' of the forming groove 32 on the inclined portion 35 is only 90% of the depth h of the forming groove 32 on the non-inclining portion 35 (i.e. 90 %) and below, and the depth displayed by 90% is taken as an example in the drawings of this embodiment.

Referring to Fig. 2 and Fig. 5, the screw tooth plate group 4 of the present embodiment is arranged on a tooth rubbing machine (not shown in the figure), utilizes one of the tooth plates 3 to be in a fixed state, and the other relative tooth plate 3 is installed in a driven manner, and then a rubbing channel 30 is formed between the two tooth plates 3, so that the metal rod body 5 is rolled by the two tooth plates 3, and at this time, cooperate with the tooth rubbing knife edge 34 Extruded to deepen the screw teeth of the metal rod body 5, and when the near free end 51 of the metal rod body 5, due to the structure of the forming groove 32 on the inclined part 35, that is, the forming groove 32 is as shown in the embodiment The trapezoidal design, as shown in Figure 6, makes the metal rod body 5 reach the initial peak of the screw thread 52 from the free end 51, and a top surface 521 is formed on it, and the top surface 521 gradually moves toward the connecting thread. The crests of the teeth 52 are tapered and connected, so that at the initial stage of locking, the top surface 521 of the screw teeth 52 can drill and cut objects (not shown in the figure) to form a track of enlarged aperture, which is helpful for the subsequent screw teeth 52 to continue to screw. When it is inserted, it can effectively reduce the locking torque and increase the locking speed, and the excess chips generated by drilling can be squeezed out from the gap between the enlarged aperture and the thread 52, so there will be no accumulation of excess chips Lack of locking resistance occurs to eliminate cracking and maintain better locking and fastening effects.

To sum up the foregoing, the utility model utilizes the thread pattern design of the screw tooth plate group to directly form the metal rod body after rolling, and the peaks of the front end of the formed thread are designed in a plane, and then the plane is turned backwards The taper creates a joint so that the desired screw is actually made for use.

But the above description is only to illustrate the preferred embodiment of the present utility model, when the scope of the utility model can not be limited with this, that is, the simple equivalent changes made according to the claims of the utility model and the content of the new description are generally the same as Modifications should still fall within the scope covered by the utility model patent.

Claims (4)

1. A screw die set, consisting of two corresponding dies, each of which includes a body and a plurality of forming grooves formed on the body, the body has an inlet port and a The outlet end in the opposite direction of the inlet end, and each of the aforementioned forming grooves is arranged in parallel from the inlet end to the direction of the outlet end, and a plurality of anti-skid grooves are formed on the forming groove adjacent to the inlet end. A rubbing knife edge is formed at the junction of the grooves; it is characterized in that: One of the end edges of each dental plate protrudes with an inclined portion, and the forming groove extends to the inclined portion, and the inclined portions on the two dental plates are correspondingly arranged, and the adjacent inclined portion on the outlet end The forming groove has a bottom wall and side walls extending upward from the bottom, and the depth of the forming groove on the inclined part is only less than 90% of the depth of the forming groove on the body. 2 . The screw die set according to claim 1 , wherein the distance between the two side walls of the forming groove on each inclined portion is wider than the width of the bottom wall. 3 . 3. The screw die set according to claim 1, wherein the bottom wall is a plane. 4. The screw die set according to claim 1, wherein the bottom wall is an arc surface.

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