SU566687A2 - Method of cutting spur wheels - Google Patents

Description

one

The invention relates to the field of metalworking.

There are known methods for cutting cylindrical gears by running with a hammer-type tool, in which the product is rotated at cutting speed, and the tool is moved at feed speed along the axis of the product.

However, pressing a part reduces productivity.

In order to increase labor productivity according to the proposed method, the processing is carried out with several grooves, which install radially to the axis of the workpiece and inform them about the axis of the planetary motion.

FIG. 1 is a diagram of the implementation of the proposed method; in fig. 2 - a device for implementing the method in section.

The method is carried out as follows.

The product 1 with external teeth, the number of which 2b rotates at a frequency of изделие and the product 2 with internal teeth, the number of which Zz is at a frequency of 2- Rotation speed nj and l determine the cutting speed allowed for the material being processed.

The gouges 3 are set to a depth of cut in the radial directions relative to the axis O-O of the item 1 (2) with the possibility of compensating the radial cutting forces Ru.

At the same time, spinning the product from the tangential cutting forces PZ is compensated, the magnitude of which affects only the cutting torque. When installing three corner angle

between the lines of the centers of the One-O dolley and the product that satisfies this condition is equal to 120 °.

The gouges 3 move at a feed rate of 5 along the axis O-O of the product under conditions of planetary motion, carried out when the housing rotates with the gouges with a frequency pz when cutting the teeth of the product 1 and the frequency L4 when cutting the teeth of the product 2. At the same time rotate around their axes

with the frequency Ls determined by the ratio of the frequencies of rotation of the product and the housing, as well as the numbers of the teeth to be cut and the teeth of the 2d bolt. In the case of machining the product 1 with external teeth, the frequency of lying, 1

Poison ("1-f" h) -.

l

When machining the product 2 with internal teeth, the rotational speed of the bit is equal to

city,

Poison ("2 +" 4)

Mr.

The ratio of the number of revolutions of the product and the dolkov, corresponding to the running-in movement, 30 is provided by forced rotation

dolby from the product as a result of the engagement of their teeth.

The distribution of the allowance between the three holes makes it possible to increase the feed rate S by a factor of three, and the planetary movement of the slot to increase the cutting speed. The concentration of the radial cutting forces of Ru increases the vibration resistance of the cutting process and provides processing at elevated conditions with high accuracy, due to a significant reduction in the spin of the product.

The tool head for drying, the implementation of the proposed method consists of a carrier rack 4 mounted on the support of a machine that moves the head at a feed rate of 5; a housing 5, made in the form of a spindle unit and mounted rotatably in the bearings of the carrier column 4; drive gear 6 mounted on the housing. The housing 5 contains three spindles 7 for fastening the tool (groove). The spindles 7 are installed circumferentially with an angular pitch of 120 ° at an equal distance from the axis O-O of the housing rotation. Each spindle 7 has a gear 8 with a number of teeth equal to the number of 2d teeth of the blade on the side of the neck of the locking of the blade 3.

The gear 8 serves to provide a consistent rotation of the die 3 and article 1 (2), corresponding to the running-in movement.

At the time of insertion of the bit into the product, the movement of the running-in is ensured by the engagement of the teeth of the bit and the cut teeth. Subsequently, as axial advancement of the bit is made, the gear teeth 8 come into contact with the cut teeth of the product, unloading the bits from the tangential cutting force, reducing their spin and eliminating the teeth of the wheel being cut.

When the helical teeth are cut with a helical tooth, a gear 8 is installed with helical teeth of the same angle of inclination.

Claims (1)

Invention Formula The method of cutting cylindrical gears according to ed. St. No. 379342, characterized in that, in order to increase labor productivity, the processing is carried out by several grooves, which establish radially to the axis of the workpiece and inform them about the axis of the planetary motion.