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Questions related from Daniel Martinez Krahmer
If you have a laser cutting machine that can cut a steel sheet up to 10 mm thick, is it possible to cut a 20 mm steel sheet in two consecutive passes? If the answer is yes or no, why?
10 October 2019 9,376 3 View
I know that a way to establish the lubrication regime in a pin on disk test is by measure the resistance between the pin and the disc. Some papers say that if the resistance is of 2 ohm, the...
06 June 2019 7,869 3 View
Hi People. Here in RG there is a similar question but for works in biology. Some of you know if is there any software available to design mechanical engineering graphical abstracts ? Something...
01 January 2019 3,509 2 View
Hi People. I need to know the temperture range for making warm forging of SAE 1045 steel.
01 January 2019 4,637 0 View
Please. I need to know what level of hardness provide a equilibrated behaviour between wear resistance and toughness. Also, if a ionic nitriding treatment reduce the friction factor between the...
11 November 2018 6,554 1 View
Esta pregunta es solo para los amigos y amigas de RG que hablan español. Les quiero preguntar si me pueden recomendar, al juicio de cada uno, cual es el mejor libro en ESPAÑOL para poder aprender...
10 October 2018 8,843 0 View
People. I need your colaboration. What value of hardness do you think is the minimal to not worsen the maquinability level of the steel? I work with steel of 0,1% C. I some of you have a paper, is...
09 September 2018 9,348 3 View
Some people say that the risk is bigger when the chip particles size are 500 micrometers or minus? What is the reason of this size?
08 August 2018 7,660 0 View
Please. I need information about the recrystallization temperature of SAE 1010 steel, and also the temperature range for warm forging.
06 June 2018 5,781 3 View
Hi People. Please, I need to know which is the best material to make the guideline plate in a hot rolling grinding ball machine. Here the is a link to see the...
03 March 2018 771 6 View
The steel bar at 850°C may be rolling with two opposite cylinders, while perpendicular at centerline cylinders there are two guide tools that mantain the straigth of the bar. What do you think? It...
03 March 2018 8,764 1 View
Hi People. I need your help in relation to obtain technical information about testing methodology of surgical drills used in bone applications. This information may be standards, papers, and so...
03 March 2018 2,337 6 View
Hi People. In this moment we made cold compression testing over cylindrical steel bar. Some of you know if exist any paper, any book that analyze the uncertainty sources that affect the geometry...
02 February 2018 8,155 2 View
Hi Friends. I need to know which is the methodology to establish the hot forging temperature range for a especific steel. Not all the steel are in the manuals. For this reason, not always people...
12 December 2017 1,845 2 View
Hi Peolpe. I need information about hot forging temperature range and also of quenching and tempering temperature range for SAE 1080 steel.
12 December 2017 9,242 1 View
Hi People. In my case I work with a high carbon steel (0,82%C). I need to know which is the Influence of sulfur and phosphorus in the toughness of quenched and tempered steel?
12 December 2017 3,448 0 View
Dear friends. Please, I need to know which is the relation between the steel making equipment and the phosphorus and sulfur in a steel? The type of equipment can limited the minimal value of...
12 December 2017 8,520 2 View
Hi friends. I need to know your opinion about WHICH and WHY are ALL the parameters that influence the toughness of a steel.
12 December 2017 4,824 3 View
Hi People. I need information about how is the influence of phosphorus and sulfur content over steel toughness? Some paper, please?
12 December 2017 285 4 View
The three principal factors in the manufacturing of steel grinding balls used in mining industry are the material, the forging process and the heat treatment. If this parts fail during drop ball...
11 November 2017 4,510 6 View
Hi People. I need the title of a book about all the gear manufacturing processes please. Many thanks.
10 October 2017 5,867 4 View
Dear Friends of RG: As my publication named " Procesos de arranque de viruta y no convencionales que se aplican en la industria metalmecánica " have 3000 reads, I understand that it is useful for...
10 October 2017 4,306 0 View
Dear Sirs. Normally I use internet on-line machining calculators to estimate cutting forces and cutting power for differents machining operations. While many of these use sofisticated variables...
07 July 2017 4,385 10 View
Hi People. I need information about the safety (hand saw break) problems caused by handsaw blades made in High Speed Steel, and also if there is any standard that say that this blades produce more...
07 July 2017 8,645 2 View
Hi People. I need information about the caractheristics that they have the materials using in antispark tools for machining metals? For example, drilling. Many thanks Sirs!!!
01 January 2017 782 2 View
Hi People. I need information about the security problems caused by handsaw blades made in High Speed Steel, and also if there is any standard that say that this blades produce more security...
01 January 2017 8,086 0 View
Hi People. Someone know what type of material is used for dies in hot stamping process? Is necessary to preheat the dies? How is the cooling system over the die to quenching the parts?
11 November 2016 10,012 0 View
Someone knows which is the methodology to make the casting process? Which is the best casting method? Normally this types of dies are of grey iron or ductile iron?
11 November 2016 1,134 0 View
Ball burnishing is a surface compression method for improve roughness and hardness. But which are the industrials uses of this method?
11 November 2016 7,602 0 View
I have interest to know which are the actual research lines in abrasive water jet cutting applied over metalic materials? Can you help me to think about this?
07 July 2016 8,615 3 View
I`m engineer, but I love the history, the philosophy, the politics. I want to make this question, about what are the reasons because the communism failed, because the communism dissapear? I think...
06 June 2016 4,892 2 View
Hi People. In relation with screw manufactured with planar flat die thread rolling, what do you think? Is better to use dies with coating like TiN or uncoated dies? Why one of this solutions are...
04 April 2016 1,861 4 View
Hi people. Someone know if exist some comercial software to train furnance operators in safe manipulation of induction casting furnance?
04 April 2016 9,128 4 View
In steel forging, if the blank is more time at forging temperature in the induction heater, the size of grain increase. So, which are the differences in mechanical properties and microestructure...
03 March 2016 2,162 3 View
Hi people. Wich is the methodology to measure the hardness variation from ambient temperature to high temperature? I know diagrams about it, but I dont know how is possible to draw this?
03 March 2016 4,007 7 View
Why is it that for some types of materials (like copper alloys, steels with 13% or more alloy elements) it is difficult to control the shape of the heating point? What are the variables than can...
03 March 2016 4,905 0 View
Hi People. I need information (an numerical value), about the maximun mechanical resistance of an SAE / AISI H13 tool steel with a hardness of 42-48HRC. I want to compare this value with values...
12 December 2015 6,234 5 View
There are one test name Feedability to evaluate the behaviour of casting material? What kind information can I obtain from this test? What represent the feeding distance, please?
10 October 2015 8,919 2 View
Hi People. I want to know which is your idea about what is the best type of examination method? Oral method, writing method, an combination? Exam with exercises? How many theory, how many...
07 July 2015 4,160 4 View
Someone know if the new CNC units have a canned cycle to this type of milling? In positive case, which are the programing parameters?
06 June 2015 4,774 0 View
06 June 2015 8,469 0 View
Someone knows if exist some safety requiriments that drilling tools must be comply? I ask about High Speed Steel drills and solid carbide drills? In positive case, which are the requirements and...
06 June 2015 7,982 0 View
SMED technique is a methodology to study the die changing process? Someone have examples over differents types of dies? In Forging, stamping, bending, and metal casting processes?
06 June 2015 4,906 3 View
I have interest to know which parts are manufactured in magnesium, what industries use this parts and why this material is chosen?
05 May 2015 2,230 5 View
Besides the type of material, what other factors modify the shrinkage percentage of a casting part?
05 May 2015 7,779 1 View
Hi people. Someone knows which is the life of this type of oil? If is simple to clean the machine and put to receive newly something vegetable oil?
05 May 2015 3,952 4 View
I have interest to know which are the actual research lines in abrasive water jet cutting?
05 May 2015 4,546 1 View
Ball burnishing is a surface compression method for improve the roughness. But which are the industrials uses of this method?
05 May 2015 9,702 0 View
Quality bolts have thread rolling. Is normal use to this bolts steel with 0,2%C alloy with low boron to improve quenchability. The thread rolling is better if the necking obtain in tensile testing...
03 March 2015 4,049 1 View
Hi people. Dr Tomov from Bulgaria has develop a formula to establish if is necessary or not a preforming steps for make a part with hot forging close die process. Someone has resolved cases to...
03 March 2015 7,172 2 View
Someone knows which is the relation between the mechanical strength of flash in hot forging dies and the type of forging steel, the forging temperature, the internal pressure die, the flash shape...
03 March 2015 5,823 0 View
For thread rolling of steel with 0,22%C, which forming oil is better to obtain complete height of thread?
03 March 2015 9,309 2 View
Recently I have known a technique named "Robust design process". I would like some information about this, please?
02 February 2015 5,129 1 View
Graphite is used to make edm electrodes. Which are the better techniques to machining graphite? Is the machine-tool a special machine?.
02 February 2015 8,998 6 View
The Salomon curves show chip temperature vs cutting speed for non ferrous alloys. This curves appear in every book, but a 1920 patent nothing explains about the work performed for Salomon.
02 February 2015 482 4 View
Does anyone know the value for constant in Chvorinov formula, for different materials, for example ductile iron?
02 February 2015 3,734 9 View
Nails for horseshoes are used for fixed horseshoe. I know that is difficult to obtain a tool (cold punch) that lasts a long time without sharpening?
02 February 2015 2,833 2 View
Which improves make this process over forging? Why is the improve? In which forging methods is use?. This technology was trasnfered to the industy?
02 February 2015 9,583 4 View
This calculation is very important to safe the dies and press machine?
02 February 2015 4,839 5 View
I like so much about the history. For this reason and to bin history and mechanical engineering, I need information about the industry development in the west countries of Europe. For example...
01 January 2015 5,457 1 View
There are many papers that study the performance of cutting tools made with high speed steel, with and without cryogenic treatment. But, what type of micro-structural modifications produce the...
01 January 2015 4,773 3 View
The literature says that behaviour can be contractive or expansive. Which is the truth? Will it be possible to control this behaviour? How? What new possibilities to casting does this situation offer?
01 January 2015 3,485 4 View
I think that people fron Cuba are the best in making this task, but people from RG what undestand about this work?. Newly, some paper, information and/or book, please?
12 December 2014 6,310 1 View
Some publication, paper o book please?.
12 December 2014 2,298 3 View
Engine valves of motor cars work at temperatures ranges between 500°C and 820°C. To do high temperature rotating bending fatigue testing, I need information about the testing machine. Is there...
12 December 2014 9,614 5 View
There are some technique to measure this question? Some information, paper, and/or book please?
12 December 2014 4,172 4 View
One of the advantages of coated cutting insert is the reduction of friction coefficient. In the case of aluminum turning, which is the material that has the lowest value?
12 December 2014 6,933 3 View
Ductile iron has good mechanical properties. In some cases pieces made by casting of ductile iron replace forging pieces. What are the reasons to forge a casting piece? What happens to the cost of...
12 December 2014 1,185 3 View
I need to measure wear of diamond grind discs use to cut concrete. I dont know if there is a standard for this task. My idea is to measure cutting force, decrement of diameter or weight loss. Can...
11 November 2014 186 6 View
Grinding ball is an spherical piece of hardened steel. Are use in the minning industry in ball mills for grinding mineral.
11 November 2014 1,146 3 View
I read that is possible to improve flow material and lubrication efficiency when laser texturing is applied over hot forging die surfaces?
11 November 2014 9,152 2 View
I know that differents shapes for the flash channels exist that designers use in hot forging dies. Can you give me information about this?. Thank you.
10 October 2014 6,774 3 View
I need information about the aplication and performance of Diamond Like Carbon coating over the surface of hot forging dies?
10 October 2014 9,877 2 View
Can help me about which is an normal requirements of decarburization in hot forging pieces?.
10 October 2014 3,936 2 View
Hi People. In this moment we made cold compression testing over cylindrical steel bar. Some of you know if exist any paper, any book that analyze the uncertainty sources that affect the measure...
01 January 1970 8,161 2 View
Hi People. I would like to publicate some of our works about metal forming (principally about hot forging process) in journal free of payment. Someone of yours knows this type of journal? Can I...
01 January 1970 5,735 0 View
Hi people. I need to know what type of material are used for manufacturing the structure of a forging press and WHY is the reason for this choice? Some publication is good for me too.
01 January 1970 5,731 1 View
Hi Peolpe. I need information about this standard. It speaks about "Machine tools - Geometric accuracy tests and practical tests"?
01 January 1970 9,577 0 View
Dear Sirs. We know that laser texturing dimples improve the lubrication applied in hot forging dies. Do you know if exist any relation between center distance of laser texturing dimples, that...
01 January 1970 8,955 2 View
Hi People. I need information about external surface defects on aluminum cans obtained by cold backward extrusion. The defect type is a line defect along the external surface of extruded can. I...
01 January 1970 3,222 1 View
Someone can give me an idea about which values are recomendables for cutting speed, and tooth feed for milling UHWMPE polymer when using uncoated solid carbide tools?
01 January 1970 3,363 1 View
Hi people. I need to know if exist an practical formula to calculate the heating time of a steel part put in an gas furnance to reach forging temperature?
01 January 1970 9,255 7 View
01 January 1970 6,007 4 View
Hi People. Recently we make experimental process cooling of a titanium Gr2 tube. The tube dimensions were: external diameter 170mm; internal diameter 65mm and 200mm of heigth. Then, we make an...
01 January 1970 4,625 6 View
