Electric heating – Metal heating – Cutting or disintegrating
Reexamination Certificate
1999-11-24
2001-07-24
Evans, Geoffrey S. (Department: 1725)
Electric heating
Metal heating
Cutting or disintegrating
C204S22400M, C219S069200
Reexamination Certificate
active
06265686
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to a discharge processing machine, and more particularly to a discharge processing machine having an improved assembly structure of a main shaft seat.
BACKGROUND OF THE INVENTION
As shown in
FIGS. 1 and 2
, a discharge processing machine
10
of the prior art comprises a machine base
11
, a work platform
12
mounted at the front end of the machine base
11
such that the work platform
12
is capable of sliding horizontally along the XY axes, a machine head seat
13
mounted on the rear end of the machine base
11
and provided with a fixation arm
14
extending toward the Y axis of the machine base
11
. The fixation arm
14
is provided at the front end thereof with a connection portion
14
A which is provided at the top thereof with a servomotor
14
B. A fixation seat
15
is fastened with the front end of the connection portion
14
A and is provided at the top end thereof with a fixation plate support
15
A with a belted wheel
15
B being pivoted thereto such that the belted wheel
15
B is connected with the rotary shaft
14
C of the servomotor
14
B by a belt
15
C. A main shaft seat
16
is mounted on the fixation seat
15
such that the main shaft seat
16
is capable of sliding along the Z axis corresponding to the normal line of the work platform
12
. The main shaft seat
16
is provided with a nut
16
A engaging a threaded rod
16
B which is fastened at one end thereof with the center of the belted wheel
15
B. The threaded rod
16
B is actuated by the servomotor
14
B to turn clockwise or counterclockwise, so as to control the position of the main shaft seat
16
moving along the Z axis to facilitate the fastening of the lower end of the main shaft seat
16
with a discharge processing head (not shown in the drawings). A workpiece (not shown in the drawings) fixed on the work platform
12
can be thus processed.
Such a prior art discharge processing machine
10
as described above is defective in design in that the servomotor
14
B is mounted on the top of the connection portion
14
A of the fixation arm
14
, and that the belted wheel
15
B is actuated by the servomotor
14
B to turn to control the advancing of the main shaft seat
16
. In light of the belted wheel
15
B being mounted in the fixation plate support
15
A, the underside of the fixation plate support
15
A forms an upper dead point of the moving range of the main shaft seat
16
. With a view to increasing the moving range of the main shaft of the prior art discharge processing machine
10
, the main shaft seat
16
, the threaded rod
16
B, the connection portion
14
A, and the fixation seat
15
are all increased in length so as to enable the top of the connection portion
14
A and the fixation plate support
15
A to have a higher horizontal position to facilitate the assembly of the servomotor
14
B and the belted wheel
15
B at the expense of the material cost as well as the processing cost. In addition, the processing machine
10
is so cumbersome that it must be disassembled to facilitate the shipping of the processing machine
10
. On arrival at the shipping destination, the processing machine
10
must be assembled and calibrated at additional cost.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a discharge processing machine with a main shaft which can be increased in its moving range without a corresponding increase in length of the connection portion of the fixation arm and the fixation seat.
It is another objective of the present invention to provide a discharge processing machine which has a relatively lower erection height to facilitate the shipping of the discharge processing machine.
In keeping with the principle of the present invention, the foregoing objectives of the present invention are attained by a discharge processing machine comprising a base, a work platform, a machine head seat, a fixation seat, and a main shaft seat. The work platform is slidably mounted on the base. The machine head seat is mounted on one side of the base and is provided with a fixation arm. The fixation seat is fastened with one end of the fixation arm. The main shaft seat is slidably mounted on the fixation seat such that the main shaft seat slides along the direction of the normal line of the work platform. The fixation seat has a threaded hole, whereas the main shaft seat is provided with a threaded rod which is pivotally fastened therewith and is engaged with the threaded hole of the fixation seat. The threaded rod is driven by a servomotor mounted in the main shaft seat. The depth in which the threaded rod is engaged with the threaded hole can be thus changed so as to actuate the main shaft seat to displace along the direction of the normal line of the work platform and relative to the fixation seat.
The foregoing objectives, features, and functions of the present invention will be more readily understood upon a thoughtful deliberation of the following detailed description of a preferred embodiment of the present invention with reference to the accompanying drawings.
REFERENCES:
patent: 5848863 (1998-12-01), Liao
patent: 63-109919 (1988-05-01), None
patent: 9-94719 (1997-04-01), None
Browdy and Neimark
Evans Geoffrey S.
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