SU1344602A1 - Dust-collecting device for vertical milling machine xm piojorj1.a226 - Google Patents

Abstract

The invention relates to ventilation technology. The purpose of the invention is to increase the efficiency of protecting the air of the working area from dust pollution and reduce energy costs. Dust receiving device is equipped with an outlet pipe (VO) 3, air-permeable reflector 5 with air intake nozzle 6. VP 3 with air intake nozzle 6 has an open wall. The suction air stream, along with dust and chips, passes through the air-permeable reflector 5 and moves towards the VP 3. The particles of dust and dust that rebounded from the casing wall meet the air-permeable reflector and, reflecting from it, return to the main stream of dust and chips and enter the VP 2 silt . (L Figure 1 OO N N O5 O ts :)

Description

The invention relates to ventilation technology, namely to local dust-collecting devices.

The purpose of the invention is to increase the efficiency of protecting the air of the working area from contamination by immersion and reduce the energy costs of operating the device.

FIG. 1 shows a dust receiving device; pas figs. 2 - the same, side view.

The milling device of a vertical milling machine for milling holes consists of a casing 1, which encloses a mill, the wall of which, located in the direction of the propagation of the flare and dust plume, is made in a spiral. The casing is rigidly connected to spring-loaded guides 2, which are articulated with sleeves fixed on the frame or support, of the machine tool. For the connection of the housing to the ventilation line, it is equipped with an outlet nozzle 3, made, as a rule, in the form of a diffuser. When milling the holes in the workpiece, the area between the casing lid and the machine caliper is covered with an elastic barrier 4. There is an air-permeable reflector 5 inside the casing which is centered and with a gap relative to the milling cutter, made, for example, in the form of a blind. The gap between the louvers and the cutter is taken 15 mm larger than the maximum diameter of the cutter.

The louver plates are installed with an inclination that coincides with the direction of movement of the dust-air flow, and in an ideal variant they have a shape that is close to the trajectory of the flare and ached, i.e. logarithmic spiral. Mounting plate step Ms. selected larger than the maximum chip size. The air-permeable reflector (louver) 5 adjoins the wall of the outlet nozzle 3 but the line, which is the beginning of the spiral wall of the case 1.

Parallel to the axis of the outlet nozzle 3, an air inlet nozzle 6 is installed, one of the walls of which is common with the outlet nozzle 3.

Dust receiving device operates as follows.

Before starting work, the bottom of the casing 1 is installed at the same height as the cuts of the P1IM orgap. When milling, the bottom of the housing is in contact with the workpiece and remains pressed to it until the end of processing. Due to inertial forces and intake air flow, dust and chips formed during the cutting process pass through the air-permeable reflector and move along the spiral wall of the casing 1 to the outlet nozzle 3. The particles of dust and dust moving from the spiral wall of the casing moving in the direction of the cutter meet an obstacle in the form of a breathable reflector (louver) and, reflecting

ten

15

20

25

thirty

35

40

45

50

55

from it, return to the main stream of dust and chips. FIG. 1, the path of movement of such particles is shown by an arrow. The suction air flow is directed into the casing through the air intake nozzle 6 and further along the channel between the spiral wall of the casing and the air-permeable reflector enters the outlet nozzle 3.

The efficiency of protecting the air of the working area from contamination by dust generated during milling and the reduction of energy consumption for operation in the proposed dust extraction device as compared to the known one is achieved by introducing a new element: an air-permeable reflector made, for example, in the form of a louver mounted concentric frese, and also due to the choice of a rational arrangement of the air intake nozzle and its shape. The presence of blinds inside the casing prevents the return of particles of dust and dust to the cutting zone, eliminating the possibility of re-capture of the particles by the cutter, preventing the formation of vortices inside the casing. At the same time, dust particles and chips acquire directional movement to the outlet nozzle, which almost completely excludes the possibility of their entry into the working area through leaks in the casing.

Positioning the air intake nozzle parallel to the axis of the outlet nozzle and giving it a conoidal shape reduces the hydraulic resistance of the shelter and ensures a unidirectional coaxial movement of the intake air and the flow of dust and chips. With this arrangement, the air intake nozzle even with small amounts of suction air was able to create in the channel between the spiral wall of the casing and the louver speeds of more than 40 m / s, which ensures high efficiency of removal of cutting waste into the outlet, preventing their entry into the air, at low energy costs .

Claims (1)

Invention Formula Dust receiving device of a vertical milling machine, comprising a spiral casing enclosing the mill, air intake nozzle, outlet nozzle, characterized in that, in order to increase the efficiency of working area air protection from dust pollution and reduce energy costs, the dust receiving device is equipped with an air-permeable chip and dust reflector the axis of the air intake nozzle is parallel to the axis of the outlet nozzle, while the reflector is mounted inside the casing concentric and with a gap relative to Braz mills and air inlet nozzles and the outlet have a common wall, and with the latter by the air intake nozzle is connected to one element of the reflector. qpue.Z