Because of the knowledge and experience in deep drilling machine, tooling and process. HTT is capable of providing our customers no matter what industry they serve a complete deep hole drilling solutions.
Our gun drilling machines have been well accepted by many well known customers in Europe, USA, Japan, China and South America in auto parts manufacturing, gas and energy, fire arms, mold and die making, animal and chicken feed.
In order to serve our customers and distributors, HTT USA Inc. and HTT Europe were established in Wisconsin, USA and Frankfurt, German.
HTT has been dedicated to deep hole drilling technology since 1997. Currently, HTT employs over 200 people across three business units. We can design, manufacture and service deep hole drilling machines. We can also offer gun drilling job shops.
Because of our extensive knowledge and experience in deep drilling machine, tooling and process, HTT is capable of providing our customers solutions across a broad spectrum of industries.
Our gun drilling machines have been purchased and utilized by major clients in auto, agricultural, energy and manufacturing industries throughout Europe, the USA, Japan, China and South America. To best serve our customers and distributors we offer the convenience of HTT-USA in Grayslake, Illinois and HTT-Europe in Frankfurt, Germany.
1、The contact area between the abrasive strip and the hole wall of the workpiece is large during honing, and the vertical load of the abrasive grain is only 1/50-1/100 of that of grinding. in addition, the cutting speed of honing is low, generally below 100m/min, which is only 1/30-1/100 of that of ordinary grinding. during honing, a large amount of cutting fluid is injected, which can make the dislodged abrasive grain flushed away in time, and can also make the processed surface fully cooled, so The workpiece is less heated, not easy to be burned, and the deformation layer is very thin, so that a higher surface quality can be obtained.
2、Honing can achieve high dimensional accuracy, shape accuracy and low roughness, honing can obtain the hole accuracy of IT6-IT7 grade, surface roughness Ra is 0.2-0.025. Because in honing, the protruding part of the surface is always first contacted with the sand bar and ground away first, until the sand bar is completely in contact with the surface of the workpiece, thus honing can make a certain degree of correction to the geometric shape error left behind by the previous process. The shape error of the hole is generally less than 0.005mm.
3、 Honing head is connected with machine tool spindle by floating, when honing head is working, it is guided by the workpiece hole wall and moves reciprocally along the center line of the pre-finished hole, so honing process cannot correct the relative position error of the hole, therefore, pre-finishing process must be arranged in the hole before honing to ensure its position accuracy. The honing allowance after boring is 0.05-0.08mm, after reaming is 0.02-0.04mm and after grinding is 0.01-0.02mm. The allowance can be divided into coarse and fine honing twice when the allowance is larger.
4、Honing hole productivity is high, short maneuvering time, honing 1 hole only need 2-3min, high processing quality, processing range, can process cast iron parts, quenched and non-quenched steel parts and bronze parts, etc., but not suitable for processing tough non-ferrous metals, processing hole diameter of 15-500mm, hole depth-diameter ratio of up to 10 or more.
The characteristics of honing processing mainly include the following points: high processing accuracy, after honing, the size accuracy and shape accuracy of the workpiece can be improved, and the surface roughness can reach Ra0.2-Ra0.8μm, some even lower than Ra0.025μm; good surface quality, the honing processing surface has crossed reticulation, which is conducive to the storage of lubricant and the maintenance of oil film, and has a high surface support rate (the actual contact area between the hole and the shaft). The actual contact area and the ratio between the two fit area), so it can withstand larger load, wear resistance, and can extend the service life.
In addition to the machining accuracy, shape accuracy of roundness, cylindricity and high surface quality, the surface of the workpiece has a cross pattern, which is conducive to the formation and maintenance of oil film. Therefore, the service life of the machined workpiece is often more than double that of the workpiece machined by other processing methods, especially suitable for the processing of precision coupling parts with high relative motion requirements. Honing processing range can be wider, in addition to through-hole, interrupted hole, blind hole, multi-step hole, residual cycloid hole, plane, spherical surface and tooth surface can be processed, can adapt to processing many varieties of metal materials.
The quality of the machine is really good, and everyone is very satisfied. We have consulted the customer service when we did not understand the part of the operation. The customer service attitude is very good and very patient. The logistics is also very good. I received the goods soon after placing the order, and I was very satisfied with the transaction.
The delivery speed is fast, the equipment is very satisfactory, the value-for-money price ratio, the service attitude is very good, and the five-star praise. The logistics is fast, the packaging is complete, the operation is convenient, and the quality is very good, after-sales guarantee, very satisfied!
The product quality is very good, exactly the same as the seller's description, very satisfied, really like it, completely exceeding expectations, the logistics speed is very fast, the logistics company's service attitude is very good, the delivery speed is very fast, and I am very satisfied with a transaction.
HTT can provide deep hole drilling solution: Job-shop + Machines + Tools.
A deep hole is defined as one that is a minimum of 10 times its diameter in depth. On the maximum side, a deep hole drilling is generally capable of drilling to a depth of 100 to 150 times its diameter. And hole deeper than 10 times the diameter should certainly be considered a deep hole, requiring a specialised drilling technique. Deep hole drilling are characterized by high material removal rate plus high accuracy with regard to the straightness of the hole, surface finish and dimensional tolerances. The extreme conditions which apply when drilling deep holes place high demands on the tool, machine and associated equipment.
1.The main difference between drilling, boring and reaming is that drilling is when you make a brand new hole in your work piece. But boring is when you enlarge the hole. When you give a finishing touch to your hole that means you are reaming. Giving a finishing touch to the hole means making the hole smoother. 2.Next thing about the three processes is that they have individual tools for them. The process of drilling uses a drill bit. But the boring process uses a lathe and reaming uses reamers. So there is also a difference in terms of tools. 3.The process of boring always comes after the drilling. And reaming comes at last. The sequence is always the same. You cannot bore until you drill. And you cannot ream until you bore. So by drilling, you can directly have a hole you want. But boring and reaming are the helping processes. Or they are the processes that will make a better hole.