CN213206272U

CN213206272U - Splint nut cold-heading blank with taper teeth under head

Info

Publication number: CN213206272U
Application number: CN202021863946.8U
Authority: CN
Inventors: 谢向君; 伍铁忠
Original assignee: Shanghai Hongji Metal Products Co ltd
Current assignee: Shanghai Hongji Metal Products Co ltd
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2021-05-14
Anticipated expiration: 2030-08-31

Abstract

The utility model provides a take splint nut cold-heading blank of tapering degree tooth under head which characterized in that: the clamp plate nut cold heading blank body (1) comprises a head (101) and a rod (102), wherein the head (101) is half of a sphere in shape, the rod (102) is cylindrical, the rod (102) comprises a taper tooth rod part (102a) and a polished rod part (102b), a hollow hole (102b01) is formed in the polished rod part (102b), and the hollow hole (102b01) is a thread forming blank hole. The direct cold heading forming head lower spline teeth and the internal thread blank hole reduce production procedures of products, shorten production period, reduce production cost, reduce manpower, improve production efficiency and material utilization rate, and have stable product quality.

Description

Splint nut cold-heading blank with taper teeth under head

Technical Field

The utility model belongs to the technical field of the hardware spare and accessory part, specifically say so and relate to a splint nut cold-heading blank of taper degree tooth is taken under head.

Background

Various hardware parts are generally used in the security industry as fastening connection and supporting installation, for example, a splint nut is a hardware part commonly used in a door lock. The splint nut with the taper teeth under the head generally adopts the processing modes of cold heading, gear rolling, drilling and tapping, and the process flow is cold heading: the method comprises the following steps of (1) adopting a cold heading disk element as a raw material, using an automatic feeding system of equipment, automatically feeding, automatically shearing, and forming a head part and a rod part by adopting a single-station cold heading forming machine; tooth rolling: extruding and forming the lower head spline teeth by using a thread rolling machine and a gear rolling plate; drilling: processing a central hole by adopting an automatic lathe; fourthly, tapping: forming internal threads by adopting an automatic tapping machine; surface treatment: the blank is subjected to surface treatment through an automatic electroplating line, so that good appearance and certain anti-corrosion performance are obtained. The traditional cold heading, gear rolling, drilling and tapping processing modes are backward, multiple devices are used, multiple production processes are required, the production process is long, workpieces need to be clamped on multiple devices for multiple times, the time and production cost are high, the labor consumption is high, the labor intensity is high, the production efficiency is low, the material utilization rate is low, the product quality stability is poor, and the mechanical property is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at that it is many to above-mentioned splint nut processing method use equipment, the production process is many and production flow is long, the work piece needs clamping many times on multiple equipment, waste time, the manufacturing cost is high, it is many to consume the manpower, high labor strength, low in production efficiency, low material utilization rate, product quality stability is poor, the defect that mechanical properties is poor, a splint nut cold-heading blank of taking taper degree tooth under the head is provided, direct cold-heading shaping flower tooth and internal thread blank hole under the head, the product production process has been reduced, production cycle has been shortened, production cost has been reduced, the manpower has been reduced, production efficiency has been improved, material utilization rate, product quality is stable, restraint the tooth through cold extrusion in addition, the tooth part streamline is even not cut off, simultaneously under the effect of work hardening, the product is pressed and is riveted mechanical properties is good.

Technical scheme

In order to realize above-mentioned technical purpose, the utility model provides a pair of take splint nut cold-heading blank of tapering degree tooth under head, its characterized in that: it includes splint nut cold-heading blank body, splint nut cold-heading blank body includes head and pole portion, the head shape is spheroidal half, pole portion is the cylinder form, pole portion includes tapering tooth pole portion and polished rod portion, establish hollow hole in the polished rod portion, hollow hole is thread forming blank hole.

Furthermore, the inclination of the taper tooth bar part is 2-3 degrees.

Furthermore, the diameter of an inner hole of the hollow hole is equal to the pitch diameter of the extruded thread, and the depth of the unthreaded hole is 3-4 thread pitches longer than that of the thread after tapping.

Advantageous effects

The utility model provides a pair of take splint nut cold-heading blank of tapering degree tooth under head, direct cold-heading shaping under head flower tooth and internal thread blank hole have reduced product production process, have shortened production cycle, have reduced manufacturing cost, have reduced the manpower, have improved production efficiency, material utilization, and product quality is stable, through cold extrusion beam tooth in addition, the tooth part streamline evenly does not have the cutout, and simultaneously under the effect of work hardening, the mechanical properties is good in the product pressure riveting.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Examples

As shown in the attached figure 1, the cold-heading blank of the splint nut with the taper teeth under the head is characterized in that: the clamp plate nut cold heading blank body 1 comprises a head 101 and a rod part 102, the head 101 is half of a sphere in shape, the rod part 102 is cylindrical, the rod part 102 comprises a taper tooth rod part 102a and a polished rod part 102b, a hollow hole 102b01 is formed in the polished rod part 102b, and the hollow hole 102b01 is a thread forming blank hole.

The inclination of the taper tooth bar part 102a is 2-3 degrees.

The diameter of an inner hole of the hollow hole 102b01 is equal to the pitch diameter of the extruded thread, and the depth of the unthreaded hole is 3-4 thread pitches longer than that of the tapped thread.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a take splint nut cold-heading blank of tapering degree tooth under head which characterized in that: the clamp plate nut cold heading blank body (1) comprises a head (101) and a rod (102), wherein the head (101) is half of a sphere in shape, the rod (102) is cylindrical, the rod (102) comprises a taper tooth rod part (102a) and a polished rod part (102b), a hollow hole (102b01) is formed in the polished rod part (102b), and the hollow hole (102b01) is a thread forming blank hole.

2. The split nut cold-headed blank with tapered teeth as defined in claim 1, wherein: the inclination of the taper tooth rod part (102a) is 2-3 degrees.

3. The split nut cold-headed blank with tapered teeth as defined in claim 1, wherein: the diameter of an inner hole of the hollow hole (102b01) is equal to the pitch diameter of the extruded thread, and the depth of the unthreaded hole is 3-4 thread pitches longer than that of the thread after tapping.