DE1923487B2 - MULTI SPINDLE DRILL HEAD SWITCHING MACHINE - Google Patents

Description

The Erfinujng relates to a multi-spindle drilling head switching machines, benehenc ¹ consists of a stand on a vertically disposed column, a rotary turret around the column for receiving a plurality of drill bits and a work table with drive.

Such automatic spindle boring head indexing machines serve the purpose of sequential processing operations such as drilling, boring, chamfering, countersinking, reaming and thread cutting.

There are already multi-spindle drilling head switching or changing machines known, their overall structure and the mechanical, electrical and hydraulic parts of which, however, are expensive and complicated.

In one of the known multi-spindle drilling head automatic switchgear, a changing device in the form of a unit separate from the basic machine is provided. The changing device is designed as a round magazine and transfers the drill head to be brought into the working position to the basic machine, which first has to be centered, coupled and clamped in order to carry out the machining process. To carry out the working movement, the drill head is moved together with the feed unit in the axial direction of the column. When the work process is finished, the drill head must be uncoupled, released and transported back into the changing device. The disadvantage here is that the drill head, which is in the working position, has to be brought back into the corresponding empty space in the replaceable insert after the machining process. Here, the next desired drill head can be transported to the transfer position and transferred to the basic machine.

In this way of working, the changing process does not take place continuously. From this This naturally results in very long changeover times. In addition, this machine requires the separate arrangement of changing device and Basic machine a relatively high design effort.

Furthermore, a multi-spindle drill head switching car

mat has become known, which has a revolver rotatable about a column for receiving a plurality of multi-spindle drill heads. The multi-spindle drill heads each sit on four parallelogram-like pivotable racks on the turret. By turning the turret, the multi-spindle drilling head is moved into its working position and initially coupled to the feed unit. After coupling to the feed unit and after

ίο The drill head can pull in the contact surfaces in Direction of work are moved, where he dives between the recess assigned to him on the turret. After the machining process, the drill head is moved back in rapid traverse and again

locked on the revolver. The drilling head is then uncoupled from the feed unit, see above that then another drill head can then be moved into the working position. Even with this one Multi-spindle drill head indexing machines are relative

high changeover times required. There are also the facilities for clamping, coupling and releasing the drill head relatively expensive.

The invention is based on the object of providing a multi-spindle drill head automatic switch of the type mentioned at the beginning

to create named type, in which the change times of the individual drill heads are small and the further characterized by low design effort. In particular, one of the Basic machine separate magazine and a detachable connection between the drill head in the working position and turrets are dispensed with, so that the machining sequences are carried out in an economically optimal manner can.

These objects are achieved according to the invention in that the arranged at the free end of the column Turret recorded drill heads in the work station in the turret remaining stationary and rotatable are and in a known manner a movable work table in the axial column direction is provided.

Another feature of the invention is that coupling elements are fixedly arranged in the turret on the output side for each drill head.
The advantages achieved by the invention consist in particular darirt that the individual drill heads are firmly connected to the turret. This fixed connection eliminates the need for centering, coupling and bracing of each individual drill head transported into the working position. The change process, i.e. the subsequent transport of two drill heads into the working position is thus considerably simplified and, moreover, can be carried out more quickly. Machining operations can thus be carried out in an economically optimal way. In addition, by arranging a vertically movable automatic rotary indexing table, multi-sided labeling can be carried out. The invention significantly lowers the investment price of the system, since the structural, mechanical, electrical and hydraulic part of the system is simple and uncomplicated. The special arrangement of the vertically movable automatic rotary indexing table means that the moment arising from the machining force and the counterforce of the lifting cylinder is kept very small

can be, so that the entire structure is significantly less stressed than was the case with previously known machines. A preferred embodiment is in

Drawing shown and is described in more detail below. It shows

F i g, 1 a side view of the multi-spindle drill head automatic switchgear,

F i g. 2 the arrangement with rotary indexing table for radial or multi-sided workpiece machining.

A column 2 is fixedly arranged vertically on the machine stand 1. A work table 4 can be moved in the axial column direction on the guide prisms 3. The work table 4 is driven by a lifting cylinder 5. At the free end of the column 2, a turret 15 with a large number of fixed drill heads 6 is rotatably mounted. The turret 15 can be rotated, adjusted and locked step by step with the fixed drill heads 6. An electric or oil motor 7 can be used as the drive, which drives a pinion 8 which engages in a ring gear 9. A cantilever 10 is placed on the free end of the column 2. He carries a fixed drive 11, which is used for all drill heads. In the working position of the respective drill head, there is a connection to this drive via coupling elements

11. On the output side there are 6 coupling elements for each drill head 12 fixed in the turret 15.

In Fig. 2 shows an extension of the invention. On the guide prisms 3 is an automatic Rotary indexing table 13 arranged so that it can be moved vertically. The rotary indexing table 13 is through the Move the lifting cylinder 5. This arrangement enables machining operations to be carried out in the radial workpiece direction and also carry out multi-sided machining operations. The resultant of the occurring Due to the arrangement of the lifting cylinder, machining forces generate a very mine overturning moment, the can become 0 with the appropriate dimensions. The machine is controlled by a central control cabinet 14 controlled off.

1 sheet of drawings

Claims (2)

Patent claims: 1. Multi-spindle drill head automatic switch, consisting of a column arranged vertically on a stand, a revolver rotatable around the column for receiving a plurality of drill heads and a work table with drive, characterized; that the drill heads (6) accommodated in the turret (15) at the free end of the column (2) can remain stationary in the turret (15) in the Af 'work station and, in a manner known per se, a work table (4) which can be moved in the axial direction of the column is provided. 2.. "· Claim 1 with an attached cantilever beam, di_'r a fixed drive for all drill heads carries, characterized in that on the output side for each drill head (6) coupling elements (12) are fixedly arranged in the turret (15).