阅读说明：本技术 一种生产螺丝制造方法 (Screw production method ) 是由 侯海祥 李俊 于 2021-07-28 设计创作，主要内容包括：本发明提供了一种新型一种生产螺丝制造方法,涉及螺丝成型技术领域,包含：提供合金胚件,合胚件缠绕在圆柱上；合金胚件制备螺丝包括了预处理步骤,拉直步骤,螺头压制步骤以及螺牙成型步骤；所述预处理步骤包括酸洗步骤以及热成型步骤,所述合金胚件吊装至酸洗槽内进行酸洗浸泡,酸洗浸蚀步骤中,将合金胚件浸泡至酸洗液中,加热至25-35℃,浸渍时间在80-150秒；处理后的合金胚件进行热处理,所述热处理为锻造处理。本发明生产的螺丝具有强度高的优点。(The invention provides a novel screw production method, which relates to the technical field of screw forming and comprises the following steps: providing an alloy blank, and winding the alloy blank on a cylinder; the preparation of the screw by the alloy blank comprises a pretreatment step, a straightening step, a screw head pressing step and a screw tooth forming step; the pretreatment step comprises an acid pickling step and a thermal forming step, the alloy blank is hoisted into a pickling tank to be pickled and soaked, in the acid pickling and etching step, the alloy blank is soaked into pickling liquid, the temperature is heated to 25-35 ℃, and the soaking time is 80-150 seconds; and carrying out heat treatment on the treated alloy blank, wherein the heat treatment is forging treatment. The screw produced by the invention has the advantage of high strength.)

1. A manufacturing method for producing screws is characterized in that: comprises the following steps:

providing an alloy blank, wherein the alloy blank is a solid thick wire and is wound on a cylinder;

the preparation of the screw by the alloy blank comprises a pretreatment step, a straightening step, a screw head pressing step and a screw tooth forming step;

the pretreatment step comprises an acid washing step and a thermal forming step, the alloy blank is hoisted into an acid washing tank to be washed and soaked, the acid washing solution comprises 85% phosphoric acid, 70% sulfuric acid, 7.5g/L hexamethylenetetramine and water, and the volume ratio of the components in the mixed solution is 200-300 parts: 5-35 parts of: 5-10 parts of: 660 and 780 parts;

in the step of pickling and etching, the alloy blank is soaked in pickling solution and heated to 25-35 ℃, and the soaking time is 80-150 seconds;

spraying and cleaning the alloy blank subjected to the acid cleaning step, drying the alloy blank subjected to the spray cleaning, and performing heat treatment on the alloy blank subjected to the drying treatment, wherein the heat treatment is forging treatment;

drawing the forged alloy blank, straightening the bent alloy blank, cutting the straightened alloy blank, and cutting the alloy blank into screw blanks with required lengths by using a cutting machine;

pressing the processed screw blank into a screw head with a required shape, simultaneously, feeding screw teeth at the tail part of the screw for forming, wherein the screw teeth are made by adopting a thread rolling machine, and obtaining the required screw after thread rolling;

and performing heat treatment on the screw teeth of the screw after the screw teeth are rolled, wherein the heat treatment mode of the screw teeth is the same as that of the heat treatment in the pretreatment step.

2. A manufacturing method of producing a screw according to claim 1, wherein: the alloy blank is magnesium alloy, wherein the magnesium alloy contains 15-25% of magnesium, 1.0-3.0% of nickel, 2-3.8% of carbon and the balance of iron.

3. A manufacturing method of producing a screw according to claim 1, wherein: the forging treatment comprises a heating step, a heating step and a cooling step;

a temperature rising step, namely raising the temperature of the alloy piece from room temperature to 200 ℃ and 240 ℃, and carrying out heat preservation treatment for 6-10h after the temperature is raised;

heating, namely heating the alloy piece after temperature rise to 800 +/-10 ℃, and keeping the temperature for 55 +/-10 min;

and a cooling step, namely cooling the alloy piece treated in the heating step, soaking the alloy piece in quenching oil for cooling, controlling the temperature of the quenching oil to be 65-68 ℃, and performing circulating cooling by using the cooling oil.

4. A manufacturing method of producing a screw according to claim 3, wherein: the temperature rise in the temperature rise step and the heating step are constant-speed heating.

Technical Field

The invention relates to the technical field of screw forming, in particular to a screw production method.

Background

The screw is a tool for fastening the parts of the object step by utilizing the physics and mathematical principles of the inclined circular rotation and friction of the object. Screws are a common term for fasteners, a common spoken word. The screw is indispensable industry requisite in daily life: extremely small screws used for cameras, glasses, clocks, electronics, and the like; general screws for televisions, electric appliances, musical instruments, furniture, and the like; large screws and nuts are used for engineering, buildings and bridges; transportation equipment, airplanes, electric cars, automobiles, and the like are used with screws of different sizes. The screw has an important task in industry, and as long as there is industry on earth, the function of the screw is always important. The screw is a common invention in production and life of people for thousands of years, and is the first invention of human according to the application field.

In the screw processing in the prior art, mechanical processing is usually adopted, an alloy blank is cut by a punch, and a required screw is obtained after screw head pressing and screw upper rolling treatment are carried out.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a novel screw production method, which can solve the technical problems in the background art.

The technical scheme adopted by the invention for solving the technical problems is as follows: a manufacturing method for producing screws comprises the following steps:

providing an alloy blank, wherein the alloy blank is a solid thick wire and is wound on a cylinder;

the preparation of the screw by the alloy blank comprises a pretreatment step, a straightening step, a screw head pressing step and a screw tooth forming step;

the pretreatment step comprises an acid washing step and a thermal forming step, the alloy blank is hoisted into an acid washing tank to be washed and soaked, the acid washing solution comprises 85% phosphoric acid, 70% sulfuric acid, 7.5g/L hexamethylenetetramine and water, and the volume ratio of the components in the mixed solution is 200-300 parts: 5-35 parts of: 5-10 parts of: 660 and 780 parts;

in the step of pickling and etching, the alloy blank is soaked in pickling solution and heated to 25-35 ℃, and the soaking time is 80-150 seconds;

spraying and cleaning the alloy blank subjected to the acid cleaning step, drying the alloy blank subjected to the spray cleaning, and performing heat treatment on the alloy blank subjected to the drying treatment, wherein the heat treatment is forging treatment;

drawing the forged alloy blank, straightening the bent alloy blank, cutting the straightened alloy blank, and cutting the alloy blank into screw blanks with required lengths by using a cutting machine;

pressing the processed screw blank into a screw head with a required shape, simultaneously, feeding screw teeth at the tail part of the screw for forming, wherein the screw teeth are made by adopting a thread rolling machine, and obtaining the required screw after thread rolling;

and performing heat treatment on the screw teeth of the screw after the screw teeth are rolled, wherein the heat treatment mode of the screw teeth is the same as that of the heat treatment in the pretreatment step.

The preferred embodiment of the invention is that the alloy blank is magnesium alloy, the magnesium alloy contains 15-25% of magnesium, 1.0-3.0% of nickel, 2-3.8% of carbon and the balance of iron.

In a preferred embodiment of the present invention, the forging process includes a temperature raising step, a heating step, and a cooling step;

a temperature rising step, namely raising the temperature of the alloy piece from room temperature to 200 ℃ and 240 ℃, and carrying out heat preservation treatment for 6-10h after the temperature is raised;

heating, namely heating the alloy piece after temperature rise to 800 +/-10 ℃, and keeping the temperature for 55 +/-10 min;

and a cooling step, namely cooling the alloy piece treated in the heating step, soaking the alloy piece in quenching oil for cooling, controlling the temperature of the quenching oil to be 65-68 ℃, and performing circulating cooling by using the cooling oil.

In a preferred embodiment of the present invention, the temperature rise in the temperature rise step and the temperature rise in the heating step are both constant-speed heating.

Compared with the prior art, the screw is pretreated in the screw production process, the screw is subjected to acid cleaning and then is subjected to heat treatment, the screw is subjected to straightening, screw head pressing and screw thread rolling steps, and then further screw thread heat treatment steps are carried out, so that the strength of the screw is high enough, and meanwhile, the production efficiency of the screw is not influenced.

Detailed Description

The present invention is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment.

The invention needs to solve the problem that the screw strength is not high enough in the production process of the screw, and the invention is further explained by combining three groups of embodiments.

Example 1

The screw production method comprises the following steps: a manufacturing method for producing screws comprises the following steps:

providing an alloy blank, wherein the alloy blank is a magnesium alloy, the magnesium alloy contains 15-25% of magnesium, 1.0-3.0% of nickel and 2-3.8% of carbon, the balance being iron, the alloy blank is a solid thick wire, and the blank is wound on a cylinder;

the preparation of the screw by the alloy blank comprises a pretreatment step, a straightening step, a screw head pressing step and a screw tooth forming step;

the pretreatment step comprises an acid washing step and a thermal forming step, the alloy blank is hoisted into an acid washing tank to be washed and soaked, the acid washing solution comprises 85% phosphoric acid, 70% sulfuric acid, 7.5g/L hexamethylenetetramine and water, and the volume ratio of the components in the mixed solution is 200 parts: 5 parts of: 5 parts of: 780 parts of (a);

in the step of pickling and etching, the alloy blank is soaked in pickling solution and heated to 25-35 ℃, and the soaking time is 80-150 seconds;

spraying and cleaning the alloy blank subjected to the acid cleaning step, drying the alloy blank subjected to the spray cleaning, and performing heat treatment on the alloy blank subjected to the drying treatment, wherein the heat treatment is forging treatment;

drawing the forged alloy blank, straightening the bent alloy blank, cutting the straightened alloy blank, and cutting the alloy blank into screw blanks with required lengths by using a cutting machine;

pressing the processed screw blank into a screw head with a required shape, simultaneously, feeding screw teeth at the tail part of the screw for forming, wherein the screw teeth are made by adopting a thread rolling machine, and obtaining the required screw after thread rolling;

and performing heat treatment on the screw teeth of the screw after the screw teeth are rolled, wherein the heat treatment mode of the screw teeth is the same as that of the heat treatment in the pretreatment step.

Preferably, the forging process includes a temperature raising step, a heating step, and a cooling step;

a heating step, namely heating the alloy piece from room temperature to 200 ℃, and carrying out heat preservation treatment for 8 hours after heating;

heating, namely heating the alloy part after temperature rise to 790 ℃, and preserving heat for 55 min;

and a cooling step, namely cooling the alloy piece treated in the heating step, soaking the alloy piece in quenching oil for cooling, controlling the temperature of the quenching oil to be 66 ℃, and performing circulating cooling on the cooling oil.

The temperature rise in the temperature rise step and the heating step are constant-speed heating.

Example 2

Example 2 the point of improvement of comparative example 1 is to adjust the proportion of the pickling solution and the parameters of the heat treatment process, and the different technical solutions of example 2 and comparative example 1 are as follows:

the pretreatment step comprises an acid washing step and a thermal forming step, the alloy blank is hoisted into an acid washing tank to be washed and soaked, the acid washing solution comprises 85% phosphoric acid, 70% sulfuric acid, 7.5g/L hexamethylenetetramine and water, and the volume ratio of the components in the mixed solution is 250 parts: 20 parts of: 7.5 parts of: 720 parts of (1);

a heating step, namely heating the alloy piece from room temperature to 220 ℃, and carrying out heat preservation treatment for 8 hours after heating;

heating, namely heating the alloy piece after temperature rise to 800 ℃, and preserving heat for 55 min;

and a cooling step, namely cooling the alloy piece treated in the heating step, soaking the alloy piece in quenching oil for cooling, controlling the temperature of the quenching oil to be 66 ℃, and performing circulating cooling on the cooling oil.

Example 3

The improvement of the embodiment 3 and the embodiment 1 is that the proportion of the pickling solution is adjusted, and the parameters of the heat treatment process are adjusted at the same time, and the embodiment 3 and the comparative embodiment 1 have the following different technical schemes:

the pretreatment step comprises an acid washing step and a thermal forming step, the alloy blank is hoisted into an acid washing tank to be washed and soaked, the acid washing solution comprises 85% phosphoric acid, 70% sulfuric acid, 7.5g/L hexamethylenetetramine and water, and the volume ratio of the components in the mixed solution is 300 parts: 35 parts of: 10 parts of: 660 parts of a solvent;

a heating step, namely heating the alloy piece from room temperature to 240 ℃, and carrying out heat preservation treatment for 8 hours after heating;

heating, namely heating the alloy piece after temperature rise to 810 ℃, and preserving heat for 55 min;

and a cooling step, namely cooling the alloy piece treated in the heating step, soaking the alloy piece in quenching oil for cooling, controlling the temperature of the quenching oil to be 66 ℃, and performing circulating cooling on the cooling oil.

The screws obtained in the above 3 groups of embodiments were tested for tensile strength and hardness, and further it was confirmed whether the pretreated alloy blank had an effect on the strength of the screw to be produced and on the efficiency of screw production.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.