JPH0344441Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a stroke length changing device for a cylinder actuated transfer feed device.

[Conventional technology]

Previously, the applicant had devised a hydraulic transfer feed device that moves a set of two feed bars, each having a plurality of gripping claws on opposing sides, three-dimensionally by the sequential operation of a plurality of hydraulic cylinders, and has already filed an application. Completed (Japanese Patent Application No. 55-89110, Japanese Patent Application No. 17334-1983)
It is.

This hydraulic transfer feed device transfers a material from a receiving position to a mold for a first processing process, and then from the first mold to a second mold for a plurality of molds arranged in series in a forging press, for example. It is used for progressive feeding towards the mold in the machining process, and its purpose is to simplify the feed bar drive device to significantly reduce costs, ease maintenance, maintain and improve feed performance, and further improve the feed bar operating cylinder. The purpose is to ensure that the stroke operates at all times.

[Problem that the invention attempts to solve]

However, in the conventional hydraulic transfer feed device, the stroke of the feed bar actuating cylinder is constant, so changing the size and number of molds can change the advance amount, lift amount, clamp amount, etc. of the transfer feed device. The disadvantage is that it cannot be changed.

This invention was devised to solve the above problems, and the object thereof is to provide a stroke length changing device that enables automatic switching of the stroke length in a cylinder-operated transfer feed device.

[Means for solving problems]

The stroke length changing device for a cylinder actuated transfer feed device according to this invention is such that the piston rod end of the feed bar actuating cylinder is fixed to an intermediate frame whose both ends are connected to the frame, and the piston rod is passed through one side of the intermediate frame. A rectangular first stopper surrounding the frame is provided so as to be movable toward and away from the longitudinally opposing inner wall of the piston rod of the frame, and a second stopper is inserted into the frame between the first stopper and the inner wall of the frame. It is characterized by being designed so that it can be removed.

〔Example〕

This invention will be explained below based on embodiments shown in the drawings.

FIG. 1 is a cross-sectional view showing the stroke length changing device of this invention and its hydraulic operating circuit, FIG. 2 is a cross-sectional view taken along the - line, and FIG. 3 is a cross-sectional view taken along the - line.

In the figure, 1 is a feed bar operating cylinder that reciprocates along the piston rod 2 together with the feed bar 3, 4 is a first stopper, 5 is a second stopper, and 6
is a frame.

The end of the piston rod 2 has a first rectangular shape in plan view.
It passes through one side of the stopper 4 and is fixed to the intermediate frame 6a. Both ends of the intermediate frame 6a are connected to the frame 6. A first stopper 4 is provided on the frame 6, with which the end surface of the cylinder 1 comes into contact when the cylinder 1 for actuating the feed bar moves toward the frame 6. The holding position of the first stopper 4 is variable in the longitudinal direction of the piston rod 2, and the first stopper 4 is held at a position farthest from the feed bar operating cylinder 1.
An end surface 4' of the frame 6 is arranged to abut against an inner wall 6' of the frame 6. The frame 6 is provided with a second stopper 5 which is movable along the frame inner wall 6' and which is movable forward and backward between the first stopper end face 4' and the frame inner wall 6'.

The end of the first stopper 4 and the second stopper 5 are connected to a hydraulic cylinder 7 and a hydraulic cylinder 8, respectively, and are driven. In the figure, 9 and 10 are electromagnetic valves, and 11 is a flow control valve with a check valve.

Next, the operating procedure of this stroke length changing device will be explained.

When the first stopper 4 is at the solid line position in FIG.
The feed bar operating cylinder 1 can operate over a long stroke, and when the first stopper 4 is at the two-dot chain line position,
The feed bar operating cylinder 1 operates in a short stroke.

To change the first stopper 4 from the solid line position to the two-dot chain line position, turn on the coil 9b of the solenoid valve 9, move the piston in the hydraulic cylinder 7 toward the feed bar operating cylinder 1 side, and move the first stopper 4 to the position indicated by the two-dot chain line. advance.

The coil 10a of the electromagnetic valve 10 is turned ON, the piston in the hydraulic cylinder 8 is lowered, and the second stopper 5 is moved between the end surface 4' of the first stopper 4 and the inner wall 6' of the frame 6.

The coil 9a of the solenoid valve 9 is turned on, the piston in the hydraulic cylinder 7 is moved in the opposite direction to the feed bar operating cylinder 1 side, and the first stopper 4 is moved backward, so that the end face 4' of the first stopper 4 and the second stopper 5 The adjustment is completed by abutting the end face 5' of.

Next, to change the first stopper 4 from the two-dot-dashed line position to the solid line position, turn on the coil 9b of the solenoid valve 9, move the piston in the hydraulic cylinder 7 to the feed bar operating cylinder 1 side, and move the first stopper 4 to the position shown in the solid line. Advance 4.

The coil 10b of the electromagnetic valve 10 is turned on, the piston in the hydraulic cylinder 8 is raised, and the second stopper 5 is moved out from between the end surface 4' of the first stopper 4 and the inner wall 6' of the frame 6.

Turn on the coil 9a of the solenoid valve 9, move the piston in the hydraulic cylinder 7 in the opposite direction to the feed bar operation cylinder 1 side, and move the first stopper 4 backward; The adjustment is completed when the end surface 4' and the inner wall 6' of the frame 6 are brought into contact.

[Effect of idea]

According to this invention, it is possible to automatically change the stroke length in a hydraulic transfer feed device, and when the size or number of molds is changed, the transfer feed can be changed by changing the stroke length of the feed bar actuating cylinder. The advance amount, lift amount, clamp amount, etc. of the device can be changed easily and quickly.

In addition, in both the case where only the first stopper 4 is used and the case where the first stopper 4 and the second stopper 5 are combined, the end face of the stopper is in contact with the frame 6, so that the feed bar operating cylinder 1 Even if it receives a contact impact, the stopper does not change its position, and the feed bar operating cylinder can always perform accurate stroke operation.

Furthermore, for the same reason, the reaction force of the feed bar actuating cylinder acting on the first stopper is directly transmitted to the frame both during long strokes and during short strokes, so that no adverse effect occurs on the stopper driving section.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing the stroke length changing device of this invention and its hydraulic operating circuit, FIG. 2 is a cross-sectional view taken along the line -- in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line --. DESCRIPTION OF SYMBOLS 1... Feed bar operation cylinder, 2... Piston rod, 3... Feed bar 4... First stopper, 5... Second stopper, 6... Frame,
7, 8...Hydraulic cylinder, 9,10...Solenoid valve,
11...Flow control valve with check.

Claims (1)

[Scope of utility model registration request] In a cylinder actuated transfer feed device, the piston rod end of the feed bar actuating cylinder is fixed to an intermediate frame whose both ends are connected to the frame, and a rectangular first stopper is provided on one side through which the piston rod passes through and surrounds the intermediate frame. The piston rod of the frame is provided so as to be movable toward and away from an inner wall facing in the longitudinal direction, and the frame is further provided with a second stopper that can be inserted into and removed from the first stopper and the inner wall of the frame. Stroke length changing device for cylinder actuated transfer feed device.