SU732095A1 - Thread cutting device - Google Patents

Description

FIELD: machine tool industry. A threading device, preferably a multiple thread, containing a drive shaft, kinematically connected to the product spindle, a longitudinal support, peremettsy from the copier, and a cross slider, carrying the cutter and controlled by the cam shaft of the copier shaft 13, are known. The aim of the invention is to increase the machining accuracy. For this, in the transverse slider there is a full groove, and on the longitudinal caliper there is a latch fixed with interactions with the groove. The invention is illustrated in the drawings, where in FIG. Figure 1 shows a multi-threading device for cutting, a longitudinal section; in fig. 2 - razrbz aa of FIG. one; in fig. 3 - view B of FIG. 1. A device for cutting multiple threads consists of body 1, longitudinal caliper 2, transverse popzn 3 and uncoupled shaft 4. Longitudinal caliper is installed in directions km, made in body 1, and has npnepeqsnye directions to qi in which transverse slider 3 is mounted. On the copier shaft 4, a lock-screw groove 5 and a disk cupcage 6 are made. A screw groove probe 7 is included in the screw groove of the shaft, which is fixed in the longitudinal cyrt port 2. The cam disc 6 through the lever 8 and the roller 9 interacts with the transverse slider. The lever 8 is installed in the groove of the longitudinal support 2 on the axis 10. The cutter 11 is fixed in the transverse slider 3, and the product, 12 - on the spindle 13. The copier shaft 4 is connected to the product spindle by a kinematic chain with a gear ratio 1, the value of which is determined by the number of visits thread. In the bore of the longitudinal caliper 2 is placed the latch 14, one end of which is made of trapezoidal. The transverse slider 3 has a trapezoidal groove, which may include a latch 14.

A device for cutting multiple threads, mounted on a support, for example, a toknotch) machine, works as follows.

The rotation of the spindle 13 to the kinematic chain with the gear ratio i is transmitted to the drive shaft 4. Vora. The shaft of the drive shaft is converted into a translational re-injection of the longitudinal support. Here, the transverse slider 3 together with the longitudinal slide moves along the axis of the product. By the beginning of the cutting, the lock 14 is inserted into the groove of the transverse slider by the action of the spring 15 (which is achieved by profiling the disc cam 6).

The cutting force acting on the cutter il and the force. The springs 17 press the slider 3 across the fastener 14. During the cutting process, the roller 9 does not touch the disk cam 6, as a result of which friction of the roller 9 against the surface of the disk cam b is absent.

At the end of the working stroke, the latch 14 stops by a fixed stop 16, which is fixed to the body, and the industrial support continues to move forward and leads the trapezoidal end of the latch 14 out of the groove of the transverse slider 3. The spring 17 abruptly retracts the transverse slider 3 with the cutter 11 from the product 12 (in the radial direction). Copier shaft 4, continuously rotated due to the closure of the screw groove 5, returns the longitudinal support to its original position (at the beginning of the cut). The long cam, acting on the roller 9, rotates the lever 8 and, compressing the spring 17, moves the transverse slider 3 with the cutter 11 to the product 12 until the latch 14 under the action of the spring 15 enters the groove of the transverse slider 3. By this moment the copier the shaft makes a full turn, and product 12, thanks to the calculated setting of the kinematic

the chain will turn to the angle corresponding to the thread length. The thread of the next run starts, the cycle repeats.

Thus, the latch 14 plays the role of a rigid stop for the transverse slider 3 and perceives the cutting force and the spring force 17. The contact between the roller 9 and the disk cam 6 of the transverse shaft 4 is absent during the cutting process. The absence of wear of the roller 9 and the disk cam 6, as well as the rigid fixation of the transverse slider 3 d by the cutter 9, exclude oscillations of the cutter, and thereby contribute to an increase in the machining accuracy.

Along with an increase in accuracy, the proposed fixture makes it possible to increase the productivity of processing by increasing the speed of rotation of the product. Due to the absence of a sliding slide of the roller against the cam, the durability of the device operation significantly increases.

Invention Formula

A threading device, preferably multiple, containing a drive shaft, kinematically connected to the product spindle, a longitudinal slide moving away from the copier, and a cross slider carrying the cutter and controlled by the cam shaft of the copier shaft, which is different from that for the purpose of raising machining accuracy, a groove is made in the transverse slider, and a retainer is mounted on the longitudinal slide with the possibility of interaction with the h.

Sources (| x) of information taken into account during the examination

1. A device for cutting multiple threads. Information leaflet, UDC 621.992.5, 1971.

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Claims (1)

Claim A tool for cutting a thread, mainly multi-threading, containing a copier shaft, kinematically connected to the product spindle, a longitudinal support moving from the copier, and a transverse slider carrying a cutter and controlled by the cam of the copier shaft, so that in order to increase the accuracy of processing , a groove is made in the transverse slider, and a latch is mounted on the longitudinal support with the possibility of interaction with g> z.