The crusher jaw dies is the key component of casting the crusher jaw, an excellent crusher jaw dies can produce a better crusher jaw, which can improve the production efficiency of the crusher and increase the service life of the crusher. This article mainly introduces what is the crusher jaw die and the design and improvement of the crusher jaw die.
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What is the crusher jaw plate?
Crusher jaw is the abbreviation of jaw crusher jaw, crusher jaw is divided into fixed jaw and movable jaw, which is the wear-resistant part of jaw crusher. In the operating state of the jaw crusher, the movable jaw follows the movable jaw to perform compound pendulum motion, forming an angle with the fixed jaw to squeeze the stone, so the jaw is also an accessory that is easily damaged in the crusher.
The jaw crusher is composed of a working cavity composed of a movable jaw and a fixed jaw. The movable jaw and the fixed jaw bear the huge crushing force and the friction of the material, and are easily damaged. In order to protect the jaw plate, the surface of the movable jaw and the fixed jaw is generally Install a wear-resistant lining, also known as a crushing plate.
The surface of the crushing plate is usually made into a tooth shape, and the angle of the tooth peak of the crushing plate is 90 degrees to 120 degrees, and its size is determined by the nature of the material to be crushed and the size of the material. When crushing small pieces of material, the angle can be smaller. The size of the tooth pitch depends on the particle size of the product, which is usually approximately equal to the width of the discharge port, and the ratio of the teeth higher than the tooth pitch can be 1/2 to 1/3.
When working, the wear speeds of the upper and lower parts of the crushing plate are different. The lower part wears faster than the upper part. When the jaw crusher is working, the crushing plate is in direct contact with the material and bears huge crushing force and friction of the material. The service life of the crushing plate is directly related to the working efficiency and production cost of the jaw crusher.
Therefore, it is particularly important to prolong the service life of the crushing plate of the jaw crusher. To enhance the service life of the crushing plate of the jaw crusher can be considered from the aspects of design, material selection, assembly and improvement during use.
The biggest consumption in the production of the crusher is the jaw plate, so in terms of material selection, we must pay attention to good quality. It can also be said that the quality of a crusher is actually based on the service life of the jaw plate, so The crusher jaw dies is particularly important. A good crusher jaw dies can produce better jaws to increase the service life of the crusher.
What is a crusher jaw dies ?
The crusher jaw dies refers to the mold used when casting the crusher jaw, which is generally made of special metal. The quality of the jaw plate mold of the crusher is related to the service life of the jaw plate of the crusher. If it is a jaw plate made by a high-quality jaw plate mold of the crusher, its service life will be much higher than that of the ordinary jaw plate. If it is an inferior crusher Jaw plates manufactured by jaw plate molds will not only greatly reduce the service life, but may even break during use, affecting normal work production.
Crusher jaw dies design?
When designing the crusher jaw dies of the movable jaw and the fixed jaw, the tooth peak of the crusher jaw template should be aligned with the tooth valley. In addition to the extrusion effect on the material when crushing the material, it also has a bending effect, and the material is relatively easy to break. In order to enhance the service life of the crushing plate produced by the crusher mold, the crushing plate of the small and medium-sized crusher is designed to be symmetrical up and down, and it can be adjusted and used when the lower part is worn.
The crusher jaw dies of the large jaw crusher is designed to be symmetrical with each other, so that the crushing plate can be replaced after wear. The material of the jaw plate mold of the crusher can be selected from white cast iron, which has the advantages of high hardness, good wear resistance, easy source and low price. But it also has shortcomings. His shortcomings are brittleness, easy to break, and short service life.
At the same time, in order to improve the service life of the jaw plate mold of the crusher, manganese steel containing 12% manganese can also be used. Manganese steel has good toughness, although the hardness is not high, but because of its characteristics of cold work hardening, it will be continuously strengthened under the action of pressure, so it will continue to wear and strengthen during work, and will not be scrapped until it is worn out and cannot be used.
The manganese steel crusher jaw dies should be subjected to water toughening treatment after casting. The operation of water toughening treatment is basically the same as that of quenching, that is, heating the cast manganese steel crusher jaw dies to one thousand degrees to one thousand and one hundred degrees. Afterwards, it is quickly cooled in water.
After the water toughening treatment, a uniform metal structure can be obtained, and the metal structure can be fixed, so as to avoid the natural deformation during use and the deterioration of the performance. The disadvantage of manganese steel is that it is more expensive, but in terms of service life and cost, manganese steel has a longer service life and lower cost than white cast iron.
Improvement of crusher jaw dies ?
In the production process, the direct force between the material and the jaw plate is very large, especially when the material with high hardness is crushed, which causes the bolts to install the jaw plate to vibrate and the nuts to loosen, which aggravates the wear of the jaw plate and produces great noise. The falling or breaking of the jaw plate will stop the equipment and affect the normal production.
In this case, just tightening the nuts and bolts before starting the machine cannot completely solve the problem. It is necessary to analyze the specific problems according to the actual situation of the site, and use reasonable methods to solve the problem.
For example, a spring anti-loose vibration damping device can be used to solve the loosening of the jaw plate produced by the jaw plate mold of the crusher during work, thereby prolonging the service life of the crushing plate and improving the work efficiency. The specific method is to use a spring to make a bolt anti-loosening and self-tightening device, which is composed of an inner spring gland, an outer spring and a spring gland.
Put this device on the bolt and tighten the nut. Since the spring is compressed by the nut to a certain extent, a strong anti-vibration effect is produced, and the bolt loosening force generated by the huge crushing force is automatically compensated by the spring tension force. Therefore, the bolt will not be loosened, thereby prolonging the service life of the jaw plate produced by the jaw plate mold of the crusher and improving the production efficiency.
Therefore, in the process of use, we can find ways to solve specific problems according to specific situations, prevent the situation of increased wear, loosening and breaking of the jaw plate, thereby prolonging the service life of the jaw plate mold of the crusher, reducing costs and improving work efficiency.
The wear reason and maintenance method of the jaw plate of the crusher?
The main reason for the wear of the jaw plate of the jaw crusher is the short-range sliding of the material relative to the jaw plate, and the cutting metal causes wear and tear. The repeated extrusion of the jaw plate on the material causes the jaw plate material to deform many times, resulting in fatigue and wear of the metal material. The specific process is as follows:
When the machine is running, the material enters the crushing cavity, and the movable jaw plate is driven by the eccentric shaft to approach the movable jaw plate.
The movable jaw plate and the fixed jaw plate are sometimes close, sometimes far away, the material is repeatedly extruded to chisel the two jaw plates, and micro-cracks are formed on the surface of the jaw plate or in the protruding part of the extruded metal, and the micro-cracks continue to expand to connected, causing the metal material on the surface of the jaw plate to fall off and cause wear.
The two jaw plates repeatedly squeeze the material for a long time, causing the metal material of the jaw plate to be partially fractured or turned up.
Maintenance method: First of all, the material selection of the jaw plate mold of the crusher should choose high-performance materials with high toughness, friction resistance and extrusion resistance; secondly, when the crusher is feeding, avoid other hard impurities from entering the crushing cavity. After the first use, the crushing cavity should be cleaned in time; finally, it must be operated according to the specified operating time during use, and the machine should not be allowed to run continuously for a long time.
The reason for the fracture of the jaw plate of the crusher and the maintenance method?
- The jaw plate produced by the jaw plate mold of the crusher is not perfect in the casting process, and there are serious defects such as dense pores inside.
- The movable jaw produced by the jaw mold of the crusher is displaced in the frame, and the bottom of one end collides with the frame side guard.
- The tension rod spring was not replaced in time after failure.
- The discharge port is smaller than the specified range, the feeding position is wrong, it is biased to a certain end or the feeding angle is too steep, so that the material directly hits the head of the movable jaw
- The equipment uses the toggle plates and toggle plate pads produced by the unqualified jaw plate mold of the crusher, resulting in the self-break protection of the toggle plate when the jaw crusher is subjected to strong impact.
Maintenance method: The two jaws are made of excellent crusher jaw dies s, and the internal structure of the crusher jaw dies s is strict; the size of the feeding port is adjusted according to the specifications and parameters, and the material is fed continuously and evenly to ensure the feeding. The position is in the middle position; replace the damaged parts such as the pull rod spring, toggle plate and toggle plate pad in time, and adjust the blanking angle.
This is the whole introduction of the crusher jaw dies in this article. I don’t know if everyone has understood it clearly. If there are still some problems that are not clearly understood, it doesn’t matter. You can leave a comment below our article. At the same time, there are other excellent articles on our website, you are welcome to continue browsing.