Metal founding – With product severing or trimming means
Patent
1992-07-30
1994-09-06
Bradley, P. Austin
Metal founding
With product severing or trimming means
164412, 164 6, 15 94, B22C 910, B22C 2300
Patent
active
053439295
DESCRIPTION:
BRIEF SUMMARY
The invention relates to an apparatus for deburring foundry cores and similar workpieces, comprising a vibration device, a stationary base carrying the vibration device, and a deburring template.
U.S. Pat. No. 4.590,636 discloses an apparatus of the above-described kind, in which the burr of the foundry core is hammered off by a vibrating movement. To realize the hammering movement of a debutting template, an adequate clearance is present between the latter and the core to be deburred. Depending on the formation of the burrs on the core, the vibrating movement to be realized there is a composite movement, so that the burrs are hammered off all around by the deburring template. Apart from the fact that automation of operations is rendered impossible, the known apparatus is further problematic, inasmuch as the burr on the sand core which possesses mostly little strength, is vibrated or hammered off by a shock effect. Such a removal of burrs endangers the core considerably and leads, as a result of periodically occurring pulses, to the necessity of a costly mechanism for avoiding transmissions of vibration.
Based on the problems arising in the state of the art with respect to the deburring operations subjecting both the tool and the workpiece to considerable stress, the teaching of the invention is based on the object of configuring and further developing the known apparatus for deburring foundry cores and similar workpieces such that an effective removal of burrs is accomplished with simple technical means and reduced wear on tools and without pulses produced by hammering.
The apparatus of the present invention, in which the aforesaid problem is solved, is characterized in that the vibrating movement of the vibration device occurs exclusively in vertical direction, and that a clearance is absent between the contours of the core to be deburred and the contours of the deburring template, so that the burr is cut off as the core passes through deburring template.
In accordance with the invention, it has been recognized that an excessive pulsating or beating of the apparatus can be avoided in that the burr is not removed by hammering, but rather is cut off. To this end, the vibration device is designed in a manner in accordance with the invention so that the vibrating movement of the vibration device occurs exclusively in vertical direction, there being no clearance between the contours of the core to be deburred and the contours of the deburring template. Accordingly, the edge of the deburring template acts like a cutting tool which severs the burr from the core in the course of the vibrating movement.
As regards an accurate adaptation of the vibrating movement to the burr to be cut off respectively, it is of special advantage, when the amplitude of the vibration device is preferably infinitely variable.
As regards an adjustment of the deburring template, it is of further advantage, when the deburring template is adjustable by means of setting screws in two axial directions. As a result, it will be avoided that not only the burr, but also the periphery of the core is cut or scraped off.
In a special embodiment, the vibration device comprises a vibrating part with a magnetic vibrator. Further, a vibrating plate with buffers is provided, wherein the buffers serve to damp the vibrating movement. To effectively prevent the vibrating plate from veering sideways, a leaf spring is provided which permits the vibration device or respectively the vibrating plate to perform a vibrating movement exclusively in vertical direction.
Likewise, it is possible to provide in an advantageous manner several deburring templates for simultaneously deburring several cores, which increases substantially the throughput in particular in an automatic operation.
Of special advantage is, in particular under the aspect of an automatic operation of the apparatus under discussion, when a handling device with elastic grippers is provided, which cooperates with the vibration device. This handling device serves to carry out automatically the opera
REFERENCES:
patent: 2333304 (1943-11-01), Ernst et al.
patent: 2648170 (1953-08-01), Esters
patent: 4030188 (1977-06-01), Reiland
patent: 4590636 (1986-05-01), Wehrmann
patent: 4844141 (1989-07-01), Trumbauer et al.
Landua Werner
Pichler Werner
Adolf Hottinger Maschinenbau GmbH
Bradley P. Austin
Puknys Erik R.
LandOfFree
Apparatus for deburring foundry cores and similar workpieces does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for deburring foundry cores and similar workpieces, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for deburring foundry cores and similar workpieces will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1323761