After welding, use a torx wrench to set the nut on the nut while it is still cool and twist it left and right. After the hole is drilled, remove the small drill bit and replace it with a drill bit with a diameter of 16 mm, and continue to enlarge and drill the broken bolt hole. After welding to the upper end of the broken bolt, continue to weld a cylinder with a diameter of 14-16 mm and a height of 8-10 mm.

After the surfacing is completed, hammer the end face with a hand hammer to cause the broken bolt to vibrate along its axial direction. Due to the heat generated by the arc before and the subsequent cooling plus the vibration at this time, the bolt and the thread of the body will be broken There is looseness between. 3.2 mm and use small and medium current to carry out surfacing from the inside to the outside of the hole of the broken bolt.

According to the hardness of materials such as stainless steel screws, it can be expressed in three different scales: HRA: It is the hardness obtained with a 60kg load and a diamond cone indenter. Pay attention that the hole must be drilled through.. It is used for extremely hard materials (such as cemented carbide, etc. Take half of the entire length of the bolt at the beginning of the surfacing.

HRB: It is the hardness obtained by using a 100kg load and a hardened steel ball with a diameter Machine Screws of 1.59 and 3. There is a conversion relationship between it and other hardness units. It uses a diamond cone with an apex angle of 120° or a steel ball with a diameter of 1. Hardness refers to the surface hardness, and there is no hardness requirement inside the material.

When it is found that there is a trace of rust leaking from the fracture after knocking, you can take the M18 nut and put it on the surfacing stigma and weld the two together. The clever use of screws from the screw factory: Hardness index of hardware screws: When starting the surfacing, do not start the arc too long So as not to bu through the outer wall of the broken bolt. 

امتیاز بدهید :

We must boycott and report Big Wafer Head Cement Board Screw Company products of unknown origin or infringement. 3. They are easy to purchase on the market and are available at a price. For bolts of specifications, such as M16 nuts, no matter how long the screw rod is, it only needs to be M16 threaded.

There are usually two statements: one refers to all anti-theft devices with threaded connections, such as: anti-theft bolts, nuts, nuts, etc. Also refer to the patent grant date and choose the latest and most recently granted patent, because the later the newer the patent, the higher the technical content. To obtain new patents, one must pass through minefields full of 'landmines', at the cost of wisdom and new technology.

If you think about it, a small screw cap has hundreds of national patents, and each patent has patent rights (claims), then how big is the coverage of thousands of rights protection? For example, in the past, patent protection was like 'landmines'. Designed on bolts, screws, screws, studs, etc. So how to confirm the true and false patents? It's very convenient. This design has its advantages.., these are only the form of anti-theft structure That's it.

It must be unique. There is also an auxiliary name: such as: riveting type, twisting type, twisting type, ratchet type, ball type, roller needle type, sheath type, etc. If you are acting for others, you must have the authorization letter from the patentee, and if you use other people's patented technology, you must have the technology use license of the patentee. The name of the patentee.

Therefore, it is more convenient for users to choose anti-theft nuts with wide adaptability. The protection of intellectual property rights is an obligation of every citizen. Do not purchase bolts based on tonnage (weight). Purchasing and using infringing products will be jointly and severally liable for legal disputes and troubles. 

امتیاز بدهید :

The thread forming step is to pass the rod of the third blank through the thread rolling action of the fourth forming die to form a screw with a complete thread, and at the same time remove the burrs of the cutting part. The cutting part forming step is to place the tail of the second blank into the third forming die to punch the tail of the second blank into a third blank with a cutting part

The tail forming step is to place the first blank into a second forming mold, and use the second forming mold to punch the other end of the first blank to form a second blank with a tail;The cap forming step is to place the low-level blank in the first forming mold for cap punching to form a first blank with a cap;Guangdong screws tell you how to make self-tapping screws In order to provide a China Sheet Metal Screws Suppliers fastener manufacturing method that reduces mold loss, improves mold service life, and reduces self-tapping screw manufacturing cost, the present invention is proposed, which includes the production of low-level blanks, cap forming, tail forming, cutting part forming and threading.

Therefore, when choosing surface treatment, The factor of fastening performance should also be considered, that is, the installation torque; the consistency of the pre-tightening force. Only when the strength of stainless steel is not enough, chrome-plated fasteners are used instead. It is rarely used in industrial fields with high anti-corrosion requirements, because good chrome-plated fasteners are as expensive as stainless steel.

Nickel plated It is mainly used in places where both anti-corrosion and good conductivity are required. Due to the thick plating, the problem that the inteal and exteal threads are difficult to screw together is caused in the fastener.. Its operating temperature can reach 225°F to 400°F (107~204°C). The following is a brief introduction to some of the commonly used coatings of fasteners based on the above factors for the reference of fastener practitioners. 

امتیاز بدهید :

The head of the screw is headshot, there are cracks, and there are cracks: This is mainly due to the material problem of the screw wire, the material is poor, there are debris, and it is not China XM Automobile Service pure enough. In the production of cold forging, the first punch is poorly installed and the machine is adjusted incorrectly. The surface needs surface protection treatment, generally electroplating treatment.

Screws must be heat treated, carbon steel self-tapping screws must be carburized, and stainless steel screws must be solid solution hardened. are used for both large and small screws. Screw head eccentricity: This is also a technical problem of the production master, mainly due to the poor installation of the second punch and incorrect adjustment by the production operator when punching the screw head. The screw has a crooked head: the screw has a crooked head, which is mainly a technical problem of the head masters.

Die cracks: Die rupture or improper R angle of the die, causing the die to collide and scratch.Screws are an indispensable industrial necessity in daily life: such as very small screws used in cameras, glasses, watches, electronics, etc. Screws are generally made of carburized steel, but can also be made of stainless steel or non-ferrous metals.

The surface of some products needs to be treated with phosphate (phosphating). When we are in production, what causes it! Next, the stainless steel screw factory has a rough analysis. Burrs: Poor forming in one punch, mainly caused by the excessive gap between the punching rod and the punching die hole or the short punching rod. Double-layered head: Poorly formed in one punch.

Crack angle: the punch needle is broken or the second punch is not heavy with the punch. Or the wrong method of using a die when heading in production (such as a die with a hexagonal washer head for the pan head), and the reason for the poor lubricating oil. So 'flexible inside and rigid outside' is a self-tapping screw that meets the performance requirements. 

امتیاز بدهید :

These are the whole process of special screw production, I hope it can help everyone understand the screw production. Even a small screw cannot be ignored.What is the whole process of special screw production? Let everyone know that mechanical production is a very cautious process, and the responsibility to be undertaken is also very important. Ca

rry out heat treatment: Change the mechanical properties of the screw. Draw the line: Undertake the above pickling link. When buying, don’t just choose cheap ones and choose low-quality ones. The increase in connection strength is limited, that is, the matching is unreasonable. It was developed to solve the shortcomings of welded nuts for thin metal plates and thin tubes, such as easy melting, easy welding of the base material, easy slippage of inteal threads, and other shortcomings.

Types of non-standard screws Flat head small head China Machine Screws Suppliers hex half hex rivet nuts, with through holes, blind holes, knurled and non-knurled. The improved rivet nuts that can prevent spin are more excellent than the pallet nuts for aircraft. , Fuiture, decoration and other electromechanical and light industrial products assembly.

In fact, M6 and M8 are recommended, because small threads can be directly tapped on the base material. 4 Structural rivet nuts are mainly used in non-structural bearing bolt connections, such as the connection of interior parts such as rail passenger cars, highway buses, and boats. The use of non-standard screws If the nut of a product needs to be installed on the outside, and the space inside is small, the indenter of the sub-riveting machine cannot be allowed to enter for pressure riveting and the method of sprouting cannot meet the strength requirements, then pressure riveting and expansion Riveting is not feasible.

امتیاز بدهید :