DE6801160U - BROACHING MACHINE WITH TWO SIMULTANEOUSLY OPERATED BROOM NEEDLES - Google Patents

Description

Maschinellabrxk Rkusch 'νΰ, 5 ·· O, ό3

565? Haan (EHLD)

Broaching machine with two simultaneously operated broaches.

With conventional vertical broaching machines with a broach the following handling is common!

The workpiece is placed _s the broach through the bore of the workpiece introduced into the clamping jaws and the feed (working) is turned "After completion dea Arbeitshubee takes the operator from the finished workpiece ₉

does the broach retract, remove the needle with one hand? place a new workpiece with the other hand and uses the broach again »With small ones? handy workpieces and broaches that are not too heavy, this enables quick, continuous work ο In many cases the workpiece and the tensile force are so small that two workpieces can be machined with two broaches at the same time However, the operator must then use both hands

the processed. Take workpieces remove "the broaches ent» and incumbent, hang up the new plants malice and then en the broaches eufgreif and use. This sequence of manipulations consumes the advantages of a two-fold broaching machine because of the required, time-consuming filing processes. mostly due to "Since the actual clearing process only takes a few seconds, the percentage increasing non-productive times are very important." In addition, the physical strain on the operator is so great that he can quickly deto it

To make it easier to remove and reinsert the broaches, broaching tool feeders have been developed for large broaching machines ₉ which pick up the broaches after they have been started up and keep them ready for reinsertion o These feeders make the broaching machines more expensive.

The invention is therefore based on the object to shorten the operating times for broaching machines with two simultaneously actuated broaches ohiia great expense ₀ According to the invention this is achieved by a Vierfaoh clamping head with four crosswise arranged clamping jaw pairs and a correspondingly formed quad "Werkstückauflege C

The broach pair is moved from working stroke to working stroke in such a way that that the operator can place and remove workpieces in the meantime.

An embodiment of the invention and its mode of operation is described with reference to Fig * 1-3 of the drawing Vb zei _ "■%: Fig.1 shows the front view of part of a broaching machine

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Ag.2 a top siobt of the Yierfaoh clamping head and Pig.3 a longitudinal section through this clamping head. Corresponding parts are given the same reference numbers.

In Jig.1, 1 denotes the drawbridge of a vertical clearing device, which can be guided by two threaded spindles, not shown. The drawbar shows a tool holder 2 in which a pin 3 with machined clamping surfaces 4 and 5 rests. The pin is held by indicated universal clamping bars 6 and 7. The pin 3 is part of a Vierfaob clamping head 8, which is designed circular & plate-shaped in its basic shape. A centering plate 9 is provided between the Vierfaoh clamping head 8 and the drawbridge 1. With 10 and 11, the lower ends of two broaches are designated. The needle is held between the pair of clamping jaws 12, 13. Hit i4, 15 are called jaw journals. The spring 16 pulls the pair of clamping jaws against the broaching needle 10. A trapezoidal clamping jaw opener 18 is attached to the lower edge 17 of the work table that picks up the workpieces. Before the drawbridge 1 with the Vlerfaob clamping head 8 reaches its upper end position, the clamping bar opener 18 expands the clamping bars 12, 13 against the force of the spring 16. A centering ring 32 is designated. The clamping spigots 14-, 15 show the position ^{N clamped w} . "In the position aired ⁿ illustrated with broken lines ^ tspreohendes applies to the broach 11. From Pig.2 can be seen that four Einspannungsöffnungen 19-

»A, · (L“, ···· ¹ J

22 and 90 ° offset are arranged on a circle line, only the pair of clamping jaws 12, 13 belonging to the binary clamping opening 19 are shown

For each pair of clamping jaws, two automatic clamping jaw openers are provided, the pins U are in clamping jaw 12 and 23 with the clamping jaw 13, the pins 15 and 24 connected Two each of the Zapfan 14, 15 and 23 * 24 are connected by one Ordered Spannbaokeöffner pressed apart with 25-28 aind long holes in the plate θ, in which the Zavfen 14,15t23,24 are ο

Pig *, 3 shows a vertical alignment along the line AB in Fig. 2. The circular plate-shaped base plate 8a and the cover plate 8b have Aueeparungen 29 and 30 »31, in which the Clamping jaws and tension springs are housed. There is a quadruple Werkatüokauflage on the work table of the broaching machine provided, the four holes arranged in Kreuafona to carry out the broaches ο The handling of the machine is as follows:

The operator places two workpieces offset by 180 °, inserts the tree needles and switches to the working stroke. «During the broaching process, he can place two more workpieces in the free receptacles. As soon as the work stroke is over, he removes the finished workpieces with both hands, switches to reverse, removes the tree needles with both hands at top dead center and inserts them into the other two pairs of clamping jaws offset by 90 °. He can then insert new workpieces during the next workshubaa,
Do the workpieces to be machined have such a large diameter

Β * · 8 ·? on f that only two workpieces are diametrically corroded on the works find dead space, the following operating aaobema results:

At the end of the first work piece, the finished workpieces are made removed. During the return of the broaches, i.n the New workpieces can be inserted at positions offset by 9C °. At top dead center, the broaches are removed with both hands and inserted through the openings of the new workpieces the jaws inserted. Now the second work stroke can be done kick off.

The arrangement is such that the drawbridge of the machine is always symmetrically loaded.

The main advantage of the new machine is that the output is increased significantly because of the reduced secondary pages can be. There is no need to put down the broaching tools. Mn part of the required manipulations can during The work stroke oüer the return of the machine is done will"

Furthermore, it is favorable for the user of broaching machines, that he can equip existing broaching machines with the described inexpensive additional equipment in the shortest possible time ^

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Claims (1)

Protection claims 1 οRaum Maßchine.rait awei simultaneously operated broaching needles » characterized by a quadruple spam head (8) with four pairs of clamping jaws arranged in a circle (e.g. 12 * 1: 5) and a correspondingly designed quadruple workpiece support ; J I ge ο I 2. Broaching machine according to Claimi, characterized in that ii the circular plate-shaped fourfacb clamping I head (8) a central pin (3) with attached clamping f surfaces (4 ₉ 5) and that the four pairs of clamping jaws each if; are offset by 90 ° on a circular line ₀ ■ Μ 3ο broaching machine according to claim 1 and 2, characterized in that G! that the workpiece support on its underside four pairs of trapezoidal jaw openers (e.g. 18) that are in the upper end position of the broaches open the pairs of clamping jaws and release the broaches (10, 11) » Maschinenfabrik Rausch K (J <5657 Haan (RHLD)