DD220547A1 - DEVICE FOR FLAT LACING WITH ULTRASOUND SURFACE SUPPORT - Google Patents

Abstract

The invention relates to a device for flat slicing with ultrasonic superimposition of flat workpieces, preferably of smaller dimensions. According to the invention, the object is achieved by fixing the ultrasonic frequency oscillating lapping disk including the vibration transducer and no longer performing any rotation and realizing the required relative horizontal movement between the tool and workpiece by means of an additional device, so that the method can be carried out on a ultrasonic impact lapping machine.

Description

Device; for flat lapping with ultrasound overlay;

O ^{: v} '^; / '' ^: · ^:

Field of application of the invention

The invention relates to a device for flat lapping with ultrasound overlaying of flat workpieces, preferably of smaller dimensions.

Characteristic of the known technical solutions

It is known that the fine machining process lapping can be considerably improved by the superposition of ultrasonic vibrations, wherein a vibration perpendicular to the horizontal movement of the workpiece has proven to be particularly favorable. The processing takes place on a special machine, in which the rotating lapping disk in the middle of a magnetostrictive oscillator is excited to plate vibrations, that the resonance case occurs and a standing wave is formed / 2 /. This arrangement has the disadvantage that the entire Erregersvetem must rotate with and this leads on the one hand to problems in energy supply via slip rings and on the other hand is expected to be disrupted by escaping cooling water, • wear because the seals used.

, , ν. f. r ·. η ί. , Λ 7 '

US impact loppers are hitherto, preferably used primarily in the production of holes and breakthroughs of a wide variety of shapes in brittle material. A newer variant, the so-called ultrasonic milling, is characterized in that the workpiece is then given a horizontal movement corresponding to the desired shape when the tool has reached the entire depth or a technically meaningful part thereof / 3, 4 / '' 'It then works analogous to a finger milling cutter. The Arbeitsauf there is in the creation of breakthroughs or Einsekungen larger dimensions, a generation ..;. 'high quality flat surfaces is not possible.

: Object of the invention

It is the object of the invention to be able to carry out the lapping with ultrasound superimposition on systems already introduced in practice, since their field of application

In order to expand it, it promotes the dissemination of this very effective refinement process and increases the plant utilization. It is also the object of the invention to remedy the deficiencies with regard to operational safety inherent in the present arrangement. In addition to the previously only possible processing only one area ever

J workpiece also a plane parallel machining feasible .., .. '..' ·. ... - · .. ..: · -.

The essence of the invention ,

The invention has for its object to avoid the disadvantages associated with the previously used Läppkinematik, in particular the required rotation of the lapping disc, and to expand the hitherto known processing arrangements

 According to the invention the object is achieved in that on a

Ultraschallstoßläppmaschine instead of a StoßläppWerkzeuges on the secondary trunk a suitably sized lapping disc is fixed, which can be excited in the predetermined frequency range of the machine to stationary plate vibrations and that vertically loaded workpieces are moved horizontally through a kinematic system on this lapping disk ·

A plane parallel processing is made possible by the fact that in principle the same kinematic arrangement a second Läppacheibe is used, which is arranged under the former, which is oscillating ('"λ and which is not excited in a simple case itself to vibrate, to further increase the effectiveness but can be driven in synchronism with the upper lapping disc .... '.,.'. "." -. " ^: .;

embodiment

The invention will be explained in more detail on an Auaführungsbeiapiel.

  1 shows the basic structure of the device for flat lapping on a Ultraschallstoßläppmaschine and Figure 2 possibilities of Planparallelläppens on a Ultraschallstoßläppanlage.

\ j) '/' The lapping a flat surface on a Ultraschallstoßläppmaschine takes place according to FIG 2 with a device whose upper part, consisting of a clamping ring 1, a pulley with an inner pin ring 2 and a motor on the capsule of the magnetostrictive transducer not shown in detail and his primary tripe 3 is attached. In these, as usual, screwed with the goal of amplifying the amplification of Sekundärrüssei 4, at the lower end of the lapping disc 8 is attached. It can be supported for relief of a support ring 9, which is to be dimensioned so that the contact with the lapping disc 8 / comes in a vibration node. The support ring

^: '.-. ·. ' , :. , , 4,,

is in turn received by the base body 10, wherein at the outer edge of a pulley with the outer pin ring 11 is rotatably mounted. This is driven by a motor, not shown. During processing, the two pin rings 2 and 11 rotate and thus give the-5-loaded with load masses. Workpieces 6 Via the workpiece receiving cages 7, the required horizontal movement, so that the lapping suspension located in the effective gap generates a material removal ·

To carry out the Planparallelläppens two lapping wheels must be engaged at the same time, of which at least one to compensate for differences in height of the workpieces is to store pendulum * In Figure 2, a possible arrangement for performing the method is shown in one embodiment. The upper lapping disc 8 is attached as in the Plachläppen. Since the active part of the lapping disc is now the bottom, can be dispensed with the use of the inner pin collar 2. Its puncture must be laid under the lapping disc 8 and could be realized in a simplified variant by fastening the pin collar 14 on the lower lapping disc 12. A more sophisticated solution would be to drive them separately analogous to the Stiftkranz "For this, the formation of the lapping disk 12 as a circular ring would offer the opportunity. In the lapping disk 12, a plurality of bores 15 for supplying the lapping suspension are to be provided in the region of the vibration nodes. The lapping disk 12 is to be oscillatingly supported, e.g. 16. Increasing the abrasive effect is undoubtedly achieved by the fact that the lower lapping disc 12 is energized in phase analogous to the lapping disc 8 by its own vibration transducer. "If the arrangement is basically the same, then a system must be stored in a swinging manner.

Claims (3)

 Erfindungsansprucb 1. Apparatus for flat lapping with ultrasound overlay, characterized in that on an Ultraachallstoß- ··. lapping machine instead of a Stoßläppwerkzeuges on the secondary trunk (4) a correspondingly sized lapping disc (8) is fixed, which can be excited in the predetermined frequency range of the machine to stationary Plattenschsdjagungen and that vertically loaded workpieces are moved horizontally through a kinematic system on this lapping disc, 2. Device according to item 1, characterized in that under the lapping disc (8) a non-excited, oscillating mounted lower lapping disc (12) is arranged and the workpieces are moved horizontally by a kinematic system between the lapping discs. 3. Apparatus according to item 1 and 2, characterized that the lower lapping disc (12) is excited synchronously with the lapping disc (8) ·; _, Dazu_j2_Seifen drawings