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25
2018-10
Continue to explain the shortcomings of several aspects of the twist drill
First of all, the twist drill pipe is a professional drilling tool, so its application is also specific and has an irreplaceable role in a large area. However, it also has some defects of its own: it is known that the twist drill is mainly composed of the handle, neck and working part. Although the geometry of the twist drill is more reasonable than the flat drill, it still has the following shortcomings: 1. Compared with other types of cutting tools, the main cutting edge of the standard twist drill is very long, which is not conducive to chip separation and chip breaking. 2. The chisel blade is too long, and the rake angle of the chisel blade is a large negative value, reaching -54 ° ~-60 °, which will generate a large axial force. First twist drill
2018-10-25
23
2018-10
What is a tunnel drilling rig? What are the commonly used tunnel drilling rig models?
Tunnel drilling rig refers to the drilling rig used to drill in the underground roadway of the mine Secondary specialized school the geological survey drilling project. Tunnel drilling rig is mainly used for deep geological exploration, gas drainage, injection and drainage, ventilation, etc. The tunnel drilling rig has the characteristics of good disintegration, light weight of each component, and the drilling direction can be 0 ° ~ 360 °. The range is conveniently adjusted. According to the use of power, it can be divided into vertical shaft type (including spiral differential feed) and power head type (mechanical and full hydraulic). The driving mode can be pneumatic, hydraulic and electric. The main components of the drilling rig are power machine (group), gyrator, drilling tool pulling mechanism, drilling.
2018-10-23
22
2018-10
What are the preparations for the construction of the drill pipe of the rotary digging machine?
Rotary drilling machine drill pipe is a kind of equipment used more in many construction projects. It is fixed on the main winch drum through the wire rope, and the drill pipe can rise or fall accordingly when the drum is rolled or put on the wire rope. In order to ensure that the drill pipe of the rotary excavator works better and more safely, it is necessary to make relevant preparations before construction. The specific contents of the preparatory work are as follows: 1. The construction organization design must be pre-examined. Before the commencement of the project, the construction unit shall review the construction methods, main technical indicators and control measures to ensure that the work is correct. 2. must carefully good measurement positioning off. Measurement positioning is the key to the whole work, related to the hole position
2018-10-22
21
2018-10
Rotary digging machine drill pipe manufacturer-unique advantages of long spiral drill pipe
The long spiral drill pipe is a kind of drill pipe commonly used in the drilling process. According to the drill pipe manufacturer of the rotary digging machine, the long spiral drill pipe is not easy to be damaged, has good vertical straightness, is easy to disassemble, and has the advantages of installation. It has become the best drill bit in the current geology and plays a decisive role in the rotary digging. Next, follow the rotary drill pipe manufacturer to see what advantages long spiral drill pipe has. Unique advantages of long spiral drill pipe: 1. There are many models of walking long spiral drill pipe, such as 400mm,500mm,600mm,700mm,800mm and so on. 2. The long spiral drill pipe has reasonable structure, good material, thick blades and mutual interaction
2018-10-21
18
2018-10
Analysis of common types of drill bits and instructions for installation and disassembly
Generally speaking, there are many kinds of drill bits. The typical and widely used drill bits are roughly as follows: deep hole drill, reamer, countersink drill, center drill, hollow drill, twist drill and offset drill. The generation of drill bits plays a great role in related industries. One of the factors that make drill bits widely used is convenient installation and disassembly: 1. The installation of drill bits is slow to lift the drill box body, put the four legs of the drill box into the four holes of the drill rotary table correspondingly, select the corresponding drill box core plate according to the specifications of the drill bit, lift the drill box core plate and put it into the drill box body, then the drill groove to be installed corresponds to the convex tip of the drill box core plate, and put the drill bit
2018-10-18
17
2018-10
Yiguang Technology invites you to attend the 20th 2018 (Tianjin) China Mining Conference
2018 20th China International Mining Conference will be held soon. Here, we sincerely invite you to visit our booth and look forward to your arrival. Date of exhibition: October 18-20, 2018 Address of exhibition: Tianjin Meijiang Convention and Exhibition Center (No. 18 Youyi South Road, Tianjin, intersection of Youyi South Road and Outer Ring Road). Yikuang Science and Technology Booth:[1101]
2018-10-17
16
2018-10
The law of energy dissipation in rocks and the dynamic fracture criterion clearly state: "When the loading energy is less than a certain threshold value, the loading energy does not participate in crack propagation at all, and all is useless dissipation energy; when the loading energy reaches the dynamic fracture criterion, the rock is dynamically destroyed, and the reactive energy dissipation energy is about 15%." Taking this theory as a starting point, the rock rotary drilling rig must have a large pressure capacity and large power head power (large torque and high speed). First of all, under the action of high pressure, the rock can realize the penetration of rock joints and the formation of cracks, and the cohesion disappears, so that it can be separated from the rock mass only by overcoming the friction force.
2018-10-16
15
2018-10
Holding roses, making wishes, eating cakes, and singing happily! Work hard and hope for a more brilliant career! In the journey of life, I spent thirty years in a hurry. Busy life already did not remember his birthday. However, the company for our birthday party forever fixed in my mind, became my heart forever moved! Flowers, exquisite cakes, let us feel the warmth of home; the gentle smiling faces of leaders and colleagues, and sincere blessings made us suddenly filled with warm happiness. filled with sweet, moving taste. When the candles are lit, the budding lotus blossoms
2018-10-15
12
2018-10
Do you know the matters needing attention of rotary digging machine drill pipe
Rotary drilling machine drill pipe is widely used in construction, especially in the selection of drill pipe, according to the geological choice, can choose the appropriate rotary drilling machine drill pipe. Drill pipes and bits can only be used for the drilling of pile holes, and are not allowed to be used for soil transfer, handling or leveling of the construction site. Never immerse the drill in liquid concrete. The drilling operation can only be started when the drill bit touches the bottom of the hole. When drilling into the sand layer or pebble layer, the machine should pay special attention to it. When drilling, the footage should not be too deep at one time, otherwise it will cause the hole wall to shrink and make the drill barrel wall and
2018-10-12
11
2018-10
Rig operation: operation skill mainly lies in pressurization
From the outside, the rotary drilling rig gives the feeling of being very tall, and it feels like the handle after entering the cab. There are many buttons, which generally gives people a complicated feeling. However, the fact is also true. From the positioning of the machine to the auxiliary working condition, and then to the drilling under the main working condition, there are indeed many actions required. However, in order to open the rotary drilling rig well, pressure is the most important among the many operating actions! The pressurization we mentioned here is not blindly downward pressurization through the handle, but to control the pressurization intensity and pressurization time for different rock and soil bottom layers. The routine is as follows: lifting suspension point floating long floating point pressurization short stroke pressurization long stroke
2018-10-11
