Metal deforming – By use of tool acting during relative rotation between tool... – During rotation of work
Reexamination Certificate
2000-01-12
2001-02-27
Crane, Daniel C. (Department: 3725)
Metal deforming
By use of tool acting during relative rotation between tool...
During rotation of work
Reexamination Certificate
active
06192727
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to a thread rolling machine, and more particularly to a mold seat adjusting structure of the thread rolling machine.
BACKGROUND OF THE INVENTION
As shown in
FIGS. 1-3
, the U.S. Pat. No. 4,677,837 discloses a thread rolling machine comprising an adjustment structure of the fixed mold thereof. The adjustment structure comprises a split thread line, a blind angle, a rolling depth, and an angle of inclination. The split thread line refers to a first slide plate
2
mounted on a machine frame
1
such that the first slide plate
2
is pushed by a threaded rod
3
to move back and forth so as to actuate the thread line of the split movable mold
5
of the fixed mold
4
. The blind angle refers to a second rotary plate
6
mounted on the first slide plate
2
such that the second rotary plate
6
is pushed by a threaded rod
7
mounted on the first slide plate
2
to rotate along the first slide plate
2
, thereby actuating the fixed mold
4
to adjust the feed angle with the movable mold
5
. A third slide plate
8
is mounted on the second rotary plate
6
such that the third slide plate
8
is pushed by a threaded rod
9
of the second rotary plate
6
to move along the left and the right of the second rotary plate
6
, thereby actuating the fixed mold
4
to adjust the distance between the fixed mold
4
and the movable mold
5
so as to provide the blank with a required roll depth. The third slide plate
8
is provided with an arcuate machine frame
10
mounted thereon. A slide block
11
is connected with a U-shaped plate
12
which is fastened with the fixed mold
4
. The fixed mold
4
is drawn to swivel for adjusting the parallel degree relative to the movable mold
5
, so as to attain consistency of the thread form.
In view of the second rotary plate
6
being mounted on the first slide plate
2
for the adjustment of the blind angle, a greater degree of freedom is resulted from the pushing and the turning. As a result, the rigidity is poor. The rotational force on the fixed mold may result in the stress destruction of the second rotary plate
6
and the threaded rod
7
. As a result, the adjustment precision is compromised.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a thread rolling machine with a mold seat adjusting structure comprising a first slide plate which is mounted on the machine frame such that the first slide plate is pushed by an adjustment rod to displace back and forth, so as to bring about the split thread line adjustment of the fixed mold. A second slide plate is slidably mounted on the first slide plate such that the second slide plate is pushed an adjustment rod to displace leftward and rightward so as to bring about the rolling depth adjustment of the fixed mold. The second slide plate is fastened with a mechanism for adjusting the angle of inclination and the blind angle of the fixed mold. The mechanism comprises the fixed mold which is provided in the front seat thereof with a semispherical seat which is then mounted on the rear seat of the fixed mold. A threaded rod is put through the fixed mold rear seat and semispherical seat. The semispherical seat allows the universal movement to push directly the threaded rod so as to bring about the angular adjustment of the fixed mold. In order to enable the threaded rod to have a greater pushing reliability, the threaded rod is provided at the rear end thereof with a blind angle adjusting block having a longitudinal slot, and an angle of inclination adjusting block having a horizontal slot. The threaded rod is actuated by the pushing of the blind angle adjusting block and the pushing of the angle of inclination adjusting block to the fixed mold adjusting angle, so as to control the precision of the angle adjustment. As a result, the present invention is capable of adjusting the inclination angle and the blind angle on the angle adjustment mechanism such that the adjustments of the thread line split and the rolling depth are attained by the linear displacements of the first slide plate and the second slide plate, without having to set up the rotary plate to adjust the blind angle as is the case with the prior art. In other words, the rigidity of the mechanism of the present invention is enhanced by means of the linear motion, thereby prolonging the adjustment precision of the present invention.
It is another objective of the present invention to provide a thread rolling machine with a mold seat adjusting structure comprising a mold seat locking mechanism which is mounted on the machine frame under the first slide plate and the second slide plate. A threaded rod is fastened with the machine frame, the first slide plate and the second slide plate such that the threaded rod is provided with an elastic body and a top plate. The first slide plate and the second slide plate are locked on the machine frame by means of the traction of the elastic body. A pressure cylinder is disposed under the top plate for urging a press plate to compress the elastic body, thereby enabling the first slide plate and the second slide plate to be relieved of the locking force.
The foregoing objectives, features, functions, and advantages 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: 375099 (1887-12-01), Rogers
patent: 2548137 (1951-04-01), Appleton
patent: 3926026 (1975-12-01), Jackson
patent: 4229966 (1980-10-01), Jackson
patent: 4677837 (1987-07-01), Jackson
patent: 5345800 (1994-09-01), Smith
patent: 986561 (1983-01-01), None
Chien Kwei-Chang
Lin Steven
Tseng Sheng-Chung
Crane Daniel C.
Hoxn Machinery Co., Ltd.
Liauh W. Wayne
LandOfFree
Mold seat adjusting structure of thread rolling machine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mold seat adjusting structure of thread rolling machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mold seat adjusting structure of thread rolling machine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2612220