SU1202760A1 - Spindle broaching tool - Google Patents

Description

 The invention relates to metalworking and can be used in pulling various slots.

The purpose of the invention is to increase the processability of the stretch by reducing the labor intensity of milling and grinding the spline grooves.

FIG. 1 shows the protrusion, general view; in fig. 2 - interposition parts and broaches in the process of pulling; in fig. 3 shows the milling pattern of the teeth during the one-angle phases; in fig. 4 shows a tooth milling scheme for a straight profile cutter; in fig. 5 is a diagram of sharpening the teeth with a grinding wheel.

The drawing contains cutting teeth made in the form of spline protrusions, the side surfaces of which are LC and with cj and the cutting edges OkS and de are located at angles V and f relative to the machined side surface of the spline groove 2 of part 3 ,. moreover, Y. The value of xb should not be less than the magnitude of the rise per tooth (or per section of teeth).

In the process of pulling with relative translational movement of the broach and the workpiece each tooth. alternately enters the work, cut chips of a certain thickness. In this case, the lateral surface Bs, as well as the non-working part of the grooves, edges a are located at some distance from the surface Ovh of the part 3,

The milling of the slotted grooves is carried out on a milling machine, with

In this case, the shank of the wedge (not shown is raised by some calculated value, which is larger than the amount of lift of the shank when slotted.

Milling is done in two transitions. At the first transition, the milling is carried out with two mills 4 at the same time, and the shank is raised to the calculated value by the formula

§Ill i- i: 4lEllL

l Sln 6,: p

where R is the radius of the first spline

tooth;

К „is the radius of the last cutting spline tooth;

vcp -

1 - the distance between the first and

the last cutting slotted teeth;

L is the length of the run; bf - corrected angle when

top of a single-angle cutter. The distance between the cutters is calculated by the formula

 Sin (K +,),

K p

Where

where the diameter of the depressions between the slots;

the number of slots enclosed between the cutters, the value is calculated; the number of splines drawn; d. T1 bj p

icp is the thickness of the splitting slot with allowance for grinding.

After milling with two single-angle mills 4 between the adjacent slotted teeth 1, an allowance remains, which is removed by a mill of the straight profile 5 at the second transition of the milling operation. At this transition, the workpiece is placed horizontally relative to the direction of the longitudinal feed of the machine table.

Grinding of the slotted grooves is carried out on a grinding machine with a profiled grinding wheel 6. The routing is mounted on centers (not shown) in a horizontal position. The liner is raised to the calculated value and each groove is polished alternately using a single division method.

The amount of lifting of the shank is determined by the formula

§In V (HiiRilL r Sin0K

where 0 | - half of the adjusted angle of the profile of the grinding wheel.

Installing the rear end shank relative to the front end

At the value of C, and having filled the grinding wheel 6 at an angle of 2 9, the slot is polished.

Milling the slot with the rise of the shank on the calculated value of Cq,

with a certain angle correction

Mills and subsequent grinding of the slot also with the rise of the shank on the calculated value of the SC, with the corresponding

by correcting the profile of the grinding wheel, it is possible to obtain ground edges on all the splines along the length of the spacing

12027604

equal width. Grinding is carried out until the final thickness of the slot is obtained, according to the outer diameter of the teeth.

FIG L

Compiled by I., Likhopa. Editor N. Pushnenkova Tehred J.Kastelevchnch Proofreader V. Sinitska

Order 8357/14 Circulation 1085 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch ShSh Patent, Uzhgorod, st. Project, 4

FIG. five

Claims (1)

SLOT DRAWING, on the lateral surfaces of the teeth of which there are undercuts and side cutting edges, characterized in that, in order to improve manufacturability, the side cutting edges are at an acute angle relative to the surface of the undercut and to the direction of elevation to the tooth.