How to solve the problem after the bit is broken?



Cause Solution
Bending, deformation, sliding Increase the rigidity of tool and machine tool, increase the rigidity of workpiece and jig
Lip Relief Angle is too small Regrinding Lip Relief Angle
High Stock Removal To reduce Stock Removal
Bit wear Use drill bit grinder to grinding
Blocking of chips Re-select the alloy bit (chip groove, helix Angle);

Re-select machining method (adjustment of feed rate, step-step method, etc.)

Poor cutting Increase the rigidity of tools and machine tools

Increase the rigidity of workpiece and jig

Predrilling center hole

The cutting plane is first adjusted or processed into a horizontal plane with a guide sleeve

Introduction about Structure of Jig Grinder

Is a development process of jig grinder is around 1940 in jig boring machine processing principle and structure of developed a precision machine tool. Machine tool was originally developed to in high hardness materials or after hardened workpiece grinding position, shape precision and surface finish of requiring high degree of the outer circle, inner hole or a taper hole.

One of the most essential variable on a jig grinding machine is the dual-spindle arrangement. The primary pin is about placed with in between 1″ or 2″ of traveling for arrangement, and afterwards the.100″ of outfeed is made use of throughout equipment procedure to outfeed right into the job. A spacer bar might be made use of in between the mill and also primary pin, permitting huge (9″ span or bigger) job to be finished. The major pin has a large range of rates to guarantee correct mill feed prices are preserved.

The development of jigs or mating openings and also secures on passes away. There are typically several outer components to a huge sharpening jig, consisting of different hydraulic electric motors, air compressors, and also numerous cooling down systems for both the hydraulic circuit and also providing coolant to the job as well as equipment itself.

The maker runs by a broadband air pin revolving a grinding bit. The air pins are detachable as well as compatible to accomplish differing surface area rates. Some pins are dealt with rate (60000 rpm), others are flexible (30000-50000 rpm), and also still others are really broadband (175000 rpm). The equipments have a conventional X-Y table with the remarkable exemption of knee traveling. All axes are indexed to.0001″ using a Vernier range on the handwheels, with greater precision readily available with making use of determining bars. The equipment head has 2 upright journeys, one harsh head modification and also the various other an accurate pin modification. The pin to which the removable air pin places likewise turns at a variable rate as well as could normally outfeed.100″ while running, once again with a precision of.0001″ on the handwheel or higher, for really accurate opening, fix as well as surface grinding. A clean jig grinder will dependably place job to a greater level of precision compared to is feasible with handwheels alone. These attributes are all crucial ready an opening and also secure system a specific range from a recommendation surface area or side.

The importance of CNC machine tool and its development history

One of the most basic concepts in advanced manufacturing technology is numerical control (NC). Before the advent of CNC machines, all machine tools were operated and controlled manually. In many of the limitations associated with manual control of machine tools, there may not be a more prominent restriction than operational skills. Under manual control, product quality is directly related to operator’s skill. Digital control is the first step in the control of machine tool.Continue reading