Are the general hexagon bolts trimmed hexagonal?

The nut is a part that closely connects the mechanical equipment, and the nut and bolt of the same specification can be connected together through the thread on the inside, for example, the nut can only be connected with the bolt of the series (in the nut, M4 refers to the inner diameter of the nut is about 4 mm, and the distance between the two thread teeth is mm); The same is true for U.S. products, e.g. a 1 4-20 nut can only be paired with a 1 4-20 screw (1 4 finger nut has an inner diameter of about inches, and 20 means that there are 20 teeth in each inch). Stainless steel, self-locking nuts, locknuts, lock nuts, four-jaw nuts, screw-in nuts, safety nuts, thin rod screw connection nuts, self-locking hexagonal cover nuts, nuts for special anchor screws, hexagonal crown thin nuts, eyebolt nuts. Fine tooth all-metal hexagonal flange face lock nut, all-metal hexagon....

The general hexagonal bolts are cut hexagonal, and the two are mainly different in process, and the other is"National standards"Different (some standards do not allow for cavities).There is a natural difference in weight.

Trimming is a cutting process, and the material utilization rate is low.

The hole is extruded by extrusion, and the plasticity of the material is high.

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Now it should be all cold heading, the machining efficiency is too slow, and the use is relatively small.

The weight difference is small but small, and the use of hexagon is wide and varied, and the wrapping is high-strength. The hexagon socket is suitable for use in places where wrench space is limited

Allen socket screws.

Uses: It is often used in machinery, mainly because it is easy to fasten, disassemble, and not easy to slip corners. Allen key.

Generally, it is a 90° bend, one end of the bend is long and the other side is short, when using the short side to hit the screw, the long side can save a lot of effort and can better tighten the screw. The long end has a round head (a hexagonal cylinder resembles a sphere) and a flat head, and the round head can be easily disassembled diagonally to install some parts that are inconvenient to lower the wrench. The manufacturing cost of the outer hexagon.

It is much lower than the hexagon, and its advantage is that the screw (wrench stress position) is thinner than the hexagon, and some places can not be replaced by the hexagon. In addition, the hexagon screws used in the machinery with low cost, low power strength and low precision requirements are much less than the hexagon socketsThe hexagon socket head is round on the outside and recessed in the middle.

The hexagon screw is the kind that is common and has more screw heads with hexagonal edges.

From the web.

As follows:

GB T 5780 Hexagon Head Bolt (Half Thread) Class C (no chamfer at end);

GB T 5781 Hexagon Head Bolt (Full Thread) Class C (no chamfer at the end);

GB T 5782 Hexagon Head Bolts (Semi-closed Teeth) Class A B (chamfered ends);

GB T 5783 Hexagon Head Bolts (Full Thread) Class A B (chamfered at the ends);

Half tooth means that the screw part is not full of teeth, and the end is active and unchamfered, which means that there is a difference in the accuracy level, and the accuracy of the non-chamfered is low and rough.

Bolts: mechanical parts, cylindrical and threaded fastening hail car parts with nuts. A type of fastener consisting of a head and a screw (a cylinder with an external thread) that is used in conjunction with a nut to fasten two parts with through holes.

This form of connection is called bolted connection. If the nut is unscrewed from the bolt, the two parts can be separated, so the bolt connection is a detachable connection.

When it comes to hex bolts, many people can know something, but forHexagon boltsI think a lot of consumers don't know what it is. Let me take a look at what it is todayHexagon boltsHexagon bolts – definition

Hexagon bolts, in fact, there are many names, such as can be called hexagon screws, for example, can be called hexagon screws. It can also be called an external hexagon bolt. It all means the same thing. It's just that the name is different.

1. Ordinary bolts are divided into three types: A, B and C. The first two are refined bolts and are rarely used. Generally speaking, ordinary bolts refer to C-level ordinary bolts.

2. In some temporary connections and connections that need to be disassembled, C-level ordinary bolts are commonly used. Common bolts commonly used in building structures are M16, M20 and M24. Some rough bolts in the machinery industry may have a relatively large diameter and are used for special purposes.

Hexagon bolts – grade performance

The hexagon bolt performance grade is composed of two numbers, which represent the nominal tensile strength value and yield ratio of the bolt material.

For example, a bolt at the performance class level, which means:

1. The nominal tensile strength of the bolt material is up to 400MPa;

2. The yield ratio of the bolt material is;

3. The nominal yield strength of the bolt material is up to 400 grades.

Hexagon bolts – the cause of the burr

1. Your clamp is not aligned with the trimming die, the trimming die should not be too large or too small, it is easy to drag the tail if it is small, and the trimming edge of the head is not correct when it is big. If there is a burr on the supporting surface, the ejector rod action of the trimming edge is fast or slow, and then the trimming die is worn, and it is also important to re-grind and pre-punch the forming.

2. In the production and manufacturing, especially when the screw head is beaten, the striking time is too fast. Or the opening of the punch is too small.

3. When the punch dies just leave the main mold when the trimming edge is just left, the back support hits the screw on the top of the main mold ejector rod, which is not fast or slow, and it is just cut off.

4. The hardness of bolt raw materials is also related, and the hardness of the best raw materials for trimming bolts is above HRB88 degrees.

Of course, it is certain that when the hexagon bolt is cut, the burr must not only be due to the above reasons, but also for other reasons. But many of the above reasons are the main ones. Production screw personnel, in the future when there are burrs on the cutting edge, we can chain destroy the above reasons.

Find out the detailed cause of the problem and where the shed potatoes are prepared. Then step by step to solve the glitch problem.

AboutHexagon boltsThat's all for you, I hope this article will be helpful to you. If you still don't understand something, you can leave me a message below, and we will answer it for you as soon as possible.

First, the classification is different.

1. Hexagon socket screws:

1) According to the material, there are stainless steel and iron. Stainless steel has SUS202 hexagon socket head screws, which is stainless steel common material, there are stainless steel SUS304 socket hexagon socket head screws, there are stainless steel SUS316 socket hexagon socket head screws.

2) Iron is divided according to the strength grade of hexagon cylindrical head screws, including hexagon head screws, hexagon head screws, hexagon head screws and hexagon head screws.

2. Bolts: 1) According to the tooth shape of the thread, it can be divided into two categories: coarse teeth and fine teeth. The coarse teeth are not shown in the bolt symbol.

2) Bolts are divided into9 levels and 8 grades. The bolts above grade (including grade) are made of low-carbon alloy steel or medium-carbon steel, and are heat-treated (quenched and tempered). They are generally referred to as high-strength bolts, and bolts that are below grade (excluding grade) are generally referred to as ordinary bolts.

Second, the application is different.

1. Hexagon screw: Similar to the countersunk screw, the nail head is embedded in the machine, and the strength of the connection is larger, but the screw must be assembled and disassembled with the corresponding hexagon wrench. It is generally used in various machine tools and their accessories.

2. Bolts: Bolts are indispensable in daily life and industrial manufacturing, and bolts are also known as industrial rice. It can be seen that the use of bolts is extensive.

The application scope of bolts includes: electronic products, mechanical products, wheel cluster digital products, power equipment, mechanical and electrical machinery products. Bolts are also used in ships, vehicles, hydraulic projects, and even chemical experiments.