DE1627038C - Machine tool, in particular lathe with temperature compensation device - Google Patents

Description

Carry out extremely precise heat compensation when the actual dimensions achieved have been established and over the control circuit regulates the flow rate of the heating medium or the temperature.

The field of application of the invention is not limited to lathes; rather it can Realize the invention also in different types of machine tools, in which in certain areas different operating temperatures occur.

1 sheet of drawings

Claims (2)

1 2, which makes it possible to reduce the dimensional deviations caused by the heat generated by the tool spindle bearings and their gears at a point remote from the point of origin, 1. Machine tool, in particular lathe 5 namely in the area of the drive spindles for the machine to compensate with at least one tool slide by a spindle. Drivable tool slide and a tem- The solution to this problem is erfindungsgeperaturausgleichseinrichtung that has an expansion body with the carriage drive spindles by made of a material with a larger linear in the axial direction play-free connected expansion body expansion coefficient than that of the io with a surrounding it, am Machine part carrying the slide drive shaft, characterized in that the part that can be fastened to the housing is made of a material that the Invar steel with the low expansion coefficient, for example the drive spindle (2) in the axial direction, forms a cavity which is connected to the expansion body (7). is provided with a surrounding and drains for oil passing through as heat media, on the slide drive housing (1) fastening means.
ren part (9) made of a material with low In a preferred embodiment, the expansion coefficient, for example Invar expansion body as a hollow space (11) formed over half of the steel, which with the carriage drive housing extending inner bushing inflows and outflows (10 ) is provided with an outwardly projecting end flange as a heat transfer medium for oil that passes through. 20 forms and the component surrounding it as an external 2. Machine tool according to claim 1, there is a socket between itself and the inner socket characterized in that the expansion body (7) having an annular cross-section recess as one extending over half of the carriage to between the end flange and the carriage drive housing (1) extending inner sleeve fitted with housing. outwardly protruding end flange (8). Here the temperature of the oil or coolant is formed and the component surrounding it (9) is an analogous measure to the thermal deformation in the as an outer socket between itself and the inner area of origin, does not need an additional socket a recess (11) ring-shaped borrowed heat to be supplied. Neither will it be a Having a cross section between the end temperature sensor still requires a controller. Therewith flange (8) and the slide drive housing (1) 30 a full compensation is fitted with the least effort is. . tion of thermal deformation achieved. In the drawing, an embodiment of the invention is shown, namely the figure shows a schematic longitudinal section through a slide 35 drive housing. In the exemplary embodiment shown, there is a feed spindle mounted in a drive housing 1 2, which have their drive from a feed drive, not shown in detail, via a pair of gears The invention relates to a machine tool, 40, 3, 4 received by axial ball bearings 5 and 6 in particular Lathe, with at least one direction free of play with a socket 7 made of bronze or tool slide, which can be driven by a spindle, made of a different material with high linear heat and a temperature compensation device that connects coefficients of expansion. This an expansion body made of a material with a larger bush protrudes by more than half of its total has a linear expansion coefficient than the 45 length out of the drive housing 1 and has of the machine part carrying it. at its outer end a protruding outward It is known German patent specification 1010 802, lowing flanges. Between these flanges between the machine stand and on it and the wall of the drive housing 1 is on the displaceably mounted spindle head of a milling, socket 7, a second socket 9, which consists of Grinding or drilling machine to arrange an expansion rod 50 a material with small linear thermal expansion, which are caused by a thermal coefficient, for example made of Invar steel Expansion of the spindle head around a die. The socket 9 has inlet and outlet openings Extend the corresponding dimension and gen 10 for that in another machine area so that the heated oil or the like by the expansion of the spindle head and also has caused by it Shifting the tool attack point- 55 rer inside an annular recess 11, les is supposed to compensate. which is traversed by the mentioned oil. the Such a temperature compensation device is the heat of the oil and is transferred to both sockets 7 but with different types of machine tools, ins- and 9. However, since the linear thermal expansion condenser in lathes, in which the thermal coefficient of the inner sleeve 7 is considerably greater compensation, is not at the point of origin of the war- 60 than that of the outer sleeve 9, the heated mc, ie on the rotating spindle bearings and their oil, causes one of the the thermal expansion of the machine drive can be made, but on one of the proportional displacement of the bearing of the location far from the point of origin, e.g. feed spindle 2 in the direction of arrow A compared to the bearing of the feed spindles of a drive housing 1. Tool slide must take place, not applicable. 65 The thermal actuator described above The invention is therefore based on the object, also allows by supplying one of a member a temperature compensation device for tool heat-carrying removed from a separate circuit machines, especially for lathes for medium in connection with a control loop