Chat Online

click to chat

QUALITY DIFFERENTIATES OUR BRAND

Different Machines to Meet All Needs



Optimization Design of the Non-magnetic Drill Rod for

 · Abstract. A beryllium-copper no-magnetic drill rod was designed for directional drilling. Through the stress analysis of the joint thread the finite element contact analysis of the joint thread was carried out by using ANSYS Workbench finite software.

Fatigue reliability assessment of small sample excavator

 · To evaluate the fatigue reliability of the excavator working device the fatigue tests of 2 sets of moving arm and bucket rod of medium-sized excavators with self-weight of 26000 kg were carried out. The virtual augmented sample method (VASM) combined with Bootstrap method was used to analyze the reliability of the excavator working device under extreme nbspsmall nbspsamples and the

Failure Analysis of Brazed Joints Using the CZM Approach

 · analysis of the joint fracture surfaces reveals different failure mechanisms of dimple rupture and dendritic failure. Resistance of the brazed joints against crack propagation evaluated by the single-parameter fracture toughness criterion shows dependency on the

Tornier Reversed FractureUniversity of Washington

 · Technique opératoire Aequalis®-Reversed FractureUDKT08.1 a equa LI s ®-Reve R seD FR a C tu R e suRGICaL teChNIque 6.3 assembly of Prosthesis holder 6.3.1 Prosthesis holder components Prosthesis holder (7) Retroversion rod (5) Retroversion rod (5 ) Ruler (3) height gauge connector (2) Locking screw (8) marker (4) height gauge (1

Failure analyses and wear mechanisms of rock drill rods a

The examined drill rods failed due to the initiation and propagation of fatigue microcracks at the outer surface of the thread. Surface cracks propagated to a certain crack length until the fracture toughness of the drill rod was exceeded and the final failure occurred. Multiple short cracks were observed on the fracture surface of the failed

Failure Analysis of Brazed Joints Using the CZM Approach

 · analysis of the joint fracture surfaces reveals different failure mechanisms of dimple rupture and dendritic failure. Resistance of the brazed joints against crack propagation evaluated by the single-parameter fracture toughness criterion shows dependency on the

Sunward DTH Surface Drill Rigs

 · Crawler Drill Rigs. SWD series down-the-hole drills are widely used in blasthole drilling applications for surface mining construction and quarries. Hole diameters range from 138mm to 255mm and hole depths up to 36m providing precise and efficient drilling. The load adaptation system ensures power matching of power to the load which

4. Drilling and Boring of Rock Drilling and Excavation

In the smart drilling approach whose development is recommended in this report the process of local rock fracture comminution or other novel forms of rock removal is the first and perhaps most crucial step in a long succession of processes of reaching a target stratum or resource reservoir.

DTH Drill Fracture Analysis of the Key Parts Scientific

Aiming at some DTH drill key parts of fracture phenomena often appear the paper analyzes its fracture characteristics under load conditions and fracture process and indicating the fracture is the main cause of fatigue damage. Also according to the theory of fatigue the article illustrates the material of surface treatment geometric structure adjustment and precision and prolongs its

Research and Development of Multi-Function Excavator

To solve the existing shortage of cutting drill a multi-function excavator drill with hydraulic rotary cutting and pneumatic impact was invented on the base of market investigation which is suitable for different rocks because of combining hydraulic rotary cutting with pneumatic impacting. If working on the soft rock the new drill will turn off the pneumatic rock drill replace the drill

Analysis of the axle fracture of the bucket wheel excavator

 · Digging and depositing of layers of materials in open pit mines are most frequently performed by bucket wheel excavators (BWE). BWE SRs 2000.32/5.0 VR92 (Fig. 1a) is used in the open pit mine in "Kolubara"Serbia. After more than 40 000 h of exploitation of the BWE SRs 2000.32/5.0 VR92 (Fig. 1a) during a period of ten years there occurred a fracture of the bucket wheel axle (Fig

Fracture and Fault Characterization Schlumberger

Drilling-induced fractures and borehole-breakout identification. Drilling-induced fractures are easily recognizable in most situations with borehole imaging tools. The fracture azimuth reveals the maximum stress orientation which is critical information for well planning in horizontal completions. Borehole breakout can also be seen with

Research and Development of Multi-Function Excavator

To solve the existing shortage of cutting drill a multi-function excavator drill with hydraulic rotary cutting and pneumatic impact was invented on the base of market investigation which is

PAPER OPEN ACCESS Fatigue failure analysis of drilling

 · of the drill. The existing indoor fatigue test results show that the fatigue limit in the air of S135 drill rod steel 4 is 553 MPa. From the analysis of the size of the cyclic load the cyclic load on the upper drill is far less than the fatigue limit and no fatigue failure occurs. However the indoor test is to use

RC Drill Rig Reverse Circulation Drilling Epiroc

 · RC drilling is a quick and efficient method that has the potential to cut overall drilling cost significantly while maintaining good sampling quality. When carried out correctly RC drilling will reduce dramatically both overall drilling costs and impact on the environment. An RC-equipped drill rig can quickly be converted to production drilling.

Investigations of Fatigue Performance of S135 Drill Pipe

The fatigue life of S135 drill pipe steel was investigated by means of tension-compression loading and torsion loading under uniaxial loading during the fatigue test. The quantitative formulas of fatigue life were obtained by regression analysis method and the fatigue fracture mechanism was analyzed. The results show that a linear correlation was found between fatigue life and effective

Engineering Analysis Of Excavator attachments using

Engineering Analysis Of Excavator attachments using the need to replace only part of the conventional breaker drill rod 1/5 or 1/10 more in line with the concept of green. the greater the

An analysis of the causes of a BWE counterweight boom

Abstract A bucket wheel excavator (BWE) collapsed in a brown coal mine. As a result of a tie rod fracture the counterweight boom the discharge boom and several other components of the other assemblies underwent plastic deformation. This paper presents the results of computer simulations of the collapse. A finite element method analysis of the counterweight boom tie rod showed stress

Evaluation and Risk Analysis of Open-Pit Mining

 · fracture behaviour and stickiness are the most significant influencing factors for bucket wheel excavator selection. The waste removal and dumping associated with mining must be handled very well so that the environmental im-pacts are as low as possible and dump stability is guaran-teed. Essential are dump foundation properties design of

Analysis of sucker rod and sinkerbar failures (Technical

 ·  article osti_ title = Analysis of sucker rod and sinkerbar failures author = Waggoner J R and Buchheit R G abstractNote = This report presents results of a study of performance and failures of the sucker rod/sinkerbar string used in beam-pumping operations through metallography finite element analysis and failure data collection.

Analysis of sucker rod and sinkerbar failures (Technical

 ·  article osti_ title = Analysis of sucker rod and sinkerbar failures author = Waggoner J R and Buchheit R G abstractNote = This report presents results of a study of performance and failures of the sucker rod/sinkerbar string used in beam-pumping operations through metallography finite element analysis and failure data collection.

Failure analyses and wear mechanisms of rock drill rods

2019 (English) In Engineering Failure Analysis ISSN E-ISSN Vol. 102 p. 69-78 Article in journal (Refereed) Published Abstract en Rock drill rod failure is a big concern for the mining industry. The tough conditions required to break down rock material into small pieces subject rock drill components to high mechanical stresses and corrosion that lead to the failure of

Failure analysis of the piston used in a pneumatic down

It is generally believed that the fracture of rock drilling tools is due to material fatigue because each part of the rock drill is subjected to periodic stress when it is in use .The failure of the rock drill rod was studied before by Abdulbaset et al. where they showed that the crack initiates on the outer surface and then propagates and merges into a large crack during the periodic

Failure Analysis Of Machine ShaftsEfficient Plant

 · As the industrial arena grows more sophisticated it seems as though operations are confronting fewer and fewer broken machine shafts. When shafts DO break however there are almost always as many theories regarding the suspected culprits as there are people involved. Fig. 1 The appearance of an overload failure depends on whether the shaft material

Fundamental Equations for Dynamic Analysis of Rod and

 · Since the pioneering work by Lubinski et al. (1) the drilling and production industry has gradually come to accept and appreciate the importance of analysis of BHA drillstring casing tubing pumping rod etc. A large number of differential equations have been established for special analysis (1–20).However no fundamental equations that unify these differential equations have been

(PDF) Determination and Analysis of the Theoretical

The analysis of the theoretical production of a bucket wheel excavator with the rule of "1/ cos φ " (with Equation (18) and Equation (21) ). The results of the comparison of the influence of

Failure Analysis/Strength Analysis of Medical Equipment

→ Analysis result The point of origin was an area of stress concentration in the thread root fatigue fracture occurred as a result of repeated bending stress. Results of bending test of medical device in accordance with ASTM F1798

Surgical TechniqueSmith Nephew

 · Guide Rod past the fracture into the region of the distal epiphyseal scar. The guide rod should be center-center in the AP and lateral views. 8. Once the guide rod is at the desired depth detach the Gripper and prepare to remove the Reducer from the tibial canal. 9. During extraction slide the Obturator () into the T-handle in order to

4. Drilling and Boring of Rock Drilling and Excavation

In any new thrust to capitalize on the potential of the smart drilling approach it is essential to tailor the response of the drill to the local rock environment (e.g. temperature pressure fracture density and resistance). This could be achieved if the relevant mechanical properties of the rock could be assessed in situ by making

Internal Fixation Rods and Nails International Center

 · The doctor will use an orthopedic drill to create a canal in the marrow cavity in the center of the . This canal will be large enough for the nail or rod to fit inside it. The way the rod or nail is inserted depends on the and the patient s unique situation For the femur (thigh ) the device may be inserted in two different ways

Conductivity analysis of hydraulic fractures filled with

Fractures in this research were partially and fully filled with proppants. Fracture width and proppant embedment were investigated by elastic mechanics. 30 Most of these studies especially the theoretical investigations treat proppants as standard spheres. And proppant particles are orderly packed in the fracture.

How to maintain the extension arm of an excavator

 · So how to maintain the excavator extension arm correctly you should pay attention to the following points of 1. Visual inspection Check whether the relevant bolts are loose whether each connecting pin is excessively worn whether the gap between the drill rod and its bushing is normal and whether there is oil seeping in between indicating

Design And Analysis Of An ExcavatorIJERT

 · done in CATIA and analysis is being done in ANSYS cylinder is a rod which is the inner part of the 1. Introduction An excavator primarily consist of four main functional systems 1.Base with translation system 2.Transmission system 3.Operational system 4.Excavating device 1.