The precision dividing apparatus of wheel loose tool EDM shaping machine
Affiliated field
The utility model relates to the precision dividing apparatus that a kind of machining tool is used.
Background technology
Process special-purpose EDM shaping machine for the wheel loose tool, the indexing accuracy of wheel loose tool circumference decorative pattern depends on the spindle index precision of lathe, therefore in order to improve the indexing accuracy of main shaft, the mode of having taked on main shaft, to install accurate encoder that has, its mounting means is that the pedestal with accurate encoder is installed on the body of make-up machine, and links together by shaft coupling and main shaft.Owing to be difficult to solve the axiality problem of main shaft and accurate encoder, cause that spindle index is inaccurate, rotation is obstructed, is generated heat or even the damage of accurate encoder.
Summary of the invention
The purpose of this utility model provides a kind of precision dividing apparatus of wheel loose tool EDM shaping machine of accurately calibration, by changing the connected mode of accurate encoder and main shaft, be able to the purpose that guarantees that the two is concentric, thereby guarantee the indexing accuracy of main shaft, and fundamentally solve because the spindle index that the two decentraction causes is inaccurate, rotation is obstructed, is generated heat or even the problem of the damage of accurate encoder.
For achieving the above object, the technical solution of the utility model is: the precision dividing apparatus of wheel loose tool EDM shaping machine, comprise the chuck that is arranged on front-end of spindle and takes turns the loose tool blank by the clamping of main shaft driven rotary, the bearing at supports main shaft and definite main shaft gyration center, drive the servomotor of main axis rotation, the encoder that is used to measure the main shaft relative angular displacement that is positioned at the main shaft tail end and is connected with main shaft, described encoder is fixed on the rear end of main shaft coaxially by rigid coupling, by the weight of main shaft carrying encoder, the shell of encoder is fixedlyed connected with lathe bed by anti-rotation device.
Owing to adopt technique scheme, the precision dividing apparatus of wheel loose tool EDM shaping machine, comprise the chuck that is arranged on front-end of spindle and takes turns the loose tool blank by the clamping of main shaft driven rotary, the bearing at supports main shaft and definite main shaft gyration center, drive the servomotor of main axis rotation, the encoder that is used to measure the main shaft relative angular displacement that is positioned at the main shaft tail end and is connected with main shaft, described encoder is fixed on the rear end of main shaft coaxially by rigid coupling, by the weight of main shaft carrying encoder, the shell of encoder is fixedlyed connected with lathe bed by anti-rotation device; Because encoder is directly installed on the main shaft, and anti-rotor only plays a part to prevent the encoder housing rotation and the weight of not carrying encoder, guaranteed the axiality of encoder and main shaft, the phenomenon generation of being obstructed, generating heat even damaging accurate encoder is forbidden, rotated to the spindle index of having avoided causing because of axiality is overproof.
Description of drawings
Accompanying drawing is the structural representation of the utility model embodiment.
The specific embodiment
As shown in drawings, the precision dividing apparatus of wheel loose tool EDM shaping machine comprises the chuck 1 that is arranged on main shaft 3 front ends and is taken turns the loose tool blank by the clamping of main shaft 3 driven rotary, the bearing 2 of supports main shaft 3 and definite main shaft 3 centres of gyration, drive the servomotor 7 of main shaft 3 rotations, the encoder 6 that is used to measure the main shaft relative angular displacement that is positioned at main shaft 3 tail ends and is connected with main shaft 3, described encoder 6 is fixed on the rear end of main shaft 3 coaxially by rigid coupling, by the weight of main shaft 3 carrying encoders 6, the shell of encoder 6 is fixedlyed connected with lathe bed 8 by anti-rotor 5.Servomotor 7 drives gear wheel 8 rotations of being fixed on the main shaft 3 by the pinion 9 that is fixed on its output shaft.
The effect of encoder 6 is the relative angular displacements that are used to measure main shaft, and information passed to servomotor 7, control the accurate calibration rotation of main shaft 3, encoder is directly installed on the main shaft simultaneously, and anti-rotor only plays a part to prevent the encoder housing rotation and the weight of not carrying encoder, guaranteed the axiality of encoder and main shaft, the phenomenon generation of being obstructed, generating heat even damaging accurate encoder is forbidden, rotated to the spindle index of having avoided causing because of axiality is overproof.