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FAQ

Hob mainly used for processing what?

Ordinary monolithic hob can cut the pizza, a high precision hob can cut softer materials such as rubber, patchwork, cutting. Mechanical hob is used in lathe processing, the type is not clear.

Din 5480 8j precision involute spline with what grade of hob processing?

Yes, I think your company is the product of the whole machine, and if it is the processing of outsourcing, we must communicate with customers

How about the front edge, the normal and the normal tooth shape of the hob with rake angle?

Generally speaking, the front rake or the negative rake of the hob, the slot is straight. If the spiral groove hob, then the front face of the eccentric distance can not be controlled, the front and left side of the tooth shape can not be measured using the front face of the intuitive measurement method, there will be no knife surface measurement method is inevitable. If you really need, you can use the following formula Tan = w (Tan an*cos af+-sin AF *sin WF /cos WF) this formula can be converted into the reference tooth angle parameters of front blade tooth angle formula in meaning, can I see the previously available analytical formula

What is the difference between worm gear hob and gear hob?

There are many forms of worm gear and the parameters of hob are different. The common Archimedes cylindrical worm gear mechanism, the worm gear hob shaft surface tooth shape is the standard modulus, the standard pressure angle (common is 20 degrees), and the gear hob usually is the surface tooth shape as the standard value.

Does the forum superiors in the gear hobbing process, because the workpiece in addition to generating motion, and an attachment movement for generating helical gear so I want to ask the question is to spur gear hob, turning a lead, the workpiece will rotate (360* / gear hob the number of degrees) for helical gear hob the same rotation of a lead, because of the additional movement of the workpiece, the workpiece rotation degree will be how much? PS: suppose the hob is the same as the gear rotation

Mainly according to the size of the spiral angle and material hardness, feed speed, this is not to say, high speed, feed volume is relatively small, more than 25 degrees or slow down a little better

I produce high speed hob, M3, double headed, pressure angle 20 degrees, machined gear Z11 and Z9 gear. The normal line changes momentum 0.06~0.1 and does not dare to shave teeth. I analyze the reasons: long hob processing, less gear, gear inappropriate: in theory inappropriate. The machining tolerance is accumulated; the vibration is large; the accuracy of the hob; the accuracy of the gear hobbing machine. So far, I haven't solved it completely. But I told the gear factory to use the same hob to gear the Z43 gear, which is obviously much better. I hope you can correct me.

The accuracy of the rotary table of the gear hobbing machine is large, or the deviation of the concentricity between the small column head and the worktable is too large. The first step is to check the gear hobbing machine workbench precision spindle work station is equipped with a standard, do not try to play the top hat, mandrel, preferably with micrometer, if the mandrel in the beating of a point always hit the minimum (minimum can reach 0.003), always in 0.015~0.03 between swing dancing. Sometimes more than 0.03, the surface of the worktable shell and the surface of the cone must be overhauled. If the core shaft can be positive, it is on the top of the top, a core shaft on the two beat, normal upper and lower deviation but over 0.015, such as the top is not so, that column with the table concentricity deviation is too large, to correct the small column. That is, double headed cutter processing, less gear, gear, public wire, there is momentum, but there is no landlord said so big ah. No more than 0.03. It is also important to check the accuracy of hobbing machines and gear blanks.

On the Y3150, ready to use left gear hob hobbing left gear. How to adjust machine tools? Thank you, heroes

Not this meaning, specific point, and, the left and right knife processing, the gear hobbing machine work table whether to reverse, if reversed, the knife pole is also reversed, need to put the turret back loaded?...... Ask for expert advice...

What do you think about the cutting hob?

Hob used for cutting, cutting out the shape of different blocks, similar volume, mainly used for Pier dishes to increase the shape of sensory effects, home braised beef / braised meat and other auxiliary materials, generally use this knife workCut hob basic attention is: cut a knife, rotating material 30-45 degrees, so that the cut out of different shapes, similar volume, to match the main ingredients