JPH0735676Y2 - Hydraulic pressure press machine - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a hydraulically operated pressure processing machine for performing pressure processing such as caulking, press-fitting, and drilling by operating a hydraulic cylinder.

[Prior Art] The applicant of the present invention discloses a hydraulic pressure press machine of this type.
I am applying for No. 63-23256. This machine has a machine body in which a support piece is formed in a substantially U shape by projecting support pieces from the upper and lower sides of vertically arranged members in the same horizontal direction, and the upper and lower support pieces of the machine body are vertically spaced from each other. A piston for mounting a tool in a cavity formed vertically through the upper support piece on the side of the lower support piece that faces the upper support piece. The hydraulic cylinder is arranged with the rod tip facing downward, the control valve is installed by stacking the control valve on the manifold equipped with the hydraulic cylinder in the machine body, and the operation is controlled by the valve device provided to form the hydraulic circuit. It is provided so that the piston rod of the cylinder descends and the workpiece mounted on the mounting portion can be pressed by a tool attached to the tip of the piston rod.

[Problems to be solved by the invention]

However, since the hydraulic cylinder has a single-point support in which the rod portion located in the lower part of the cavity is fixed to the upper support piece of the machine body, if the pressure force when pressurizing the workpiece is increased, the tip of the piston rod The upper support piece of the hydraulic cylinder so that the hydraulic cylinder does not twist and displace with the fixed point as a fulcrum due to the reaction force of the pressurizing force caused by the misalignment between the tool and the work piece placed on the placing part of the lower support piece. Must be firmly adhered to the hydraulic cylinder. For this reason, if it is attempted to support the hydraulic cylinder at two points, the rod part and the head part, respectively, the reaction force of the applied pressure when the workpiece is pressed There is a problem that the fixing point is affected by the vertically extending action of the hydraulic cylinder due to the above, and it is difficult to obtain good fixing of the hydraulic cylinder.

The present invention solves such a problem. The vertical extension of the hydraulic cylinder due to the reaction force of the pressurizing force when the workpiece is pressure-processed does not affect the fixed portion. The present invention provides a hydraulically actuated pressure processing machine which is supported at various points so that good adhesion of a hydraulic cylinder can be obtained.

[Means for solving problems]

For this reason, the present invention divides the interior into a head chamber and a rod chamber by fixing the head portion and the rod portion to both ends of a cylinder tube into which a piston fixed to a piston rod to which a tool is attached is slidably inserted. Hydraulic cylinder formed,
An upper support piece of a lower support piece of the machine body, which has a machine body in which a support piece is formed to project in the same horizontal direction with a space vertically provided between vertically arranged members. A mounting part for mounting the work piece is formed on the side opposite to, and a hydraulic cylinder is installed in the upper support piece in a cavity formed vertically through the piston, with the tip of the piston rod facing downward. A valve device in which a plurality of control valves are stacked and installed on the upper surface of a manifold having a flow path formed inside is configured to provide a hydraulic circuit that controls the operation of the hydraulic cylinder, and the manifold of the valve device is installed in the machine body. The hydraulic cylinder is fixedly arranged in the upper part that forms the upper support piece, and the rod part located below the cavity of the hydraulic cylinder is fixed to the upper support piece of the machine body and the head part is not fixed to the machine body. Is a rod part fixed to the upper support piece of the machine body. The upper part has a guide part that allows vertical movement and prevents lateral movement, and the guide part has a flow passage formed therein to communicate with the head chamber and the rod chamber. It is fixed to the manifold of the valve device fixed to the machine body to connect the flow path of the guide portion and the flow path of the manifold.

[Action]

In the structure of the present invention, when the workpiece is pressed, the hydraulic cylinder and the guide portion move vertically even if the hydraulic cylinder is stretched vertically by the reaction force of the applied pressure. The hydraulic cylinder is relatively movable and is supported at two places by a rod portion fixed to the upper support piece of the machine body and a guide portion fixed to the manifold of the valve device. For this reason, the hydraulic cylinder can be supported at two places without the upward extension action due to the reaction force of the pressurizing force applied when the workpiece is pressed, and it can be extended in the vertical direction. A good fixation of the hydraulic cylinder can be obtained without the action affecting the fixation point.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 to 4, reference numeral 1 denotes a machine body, in which an inverted L-shaped member 3 is vertically arranged on a base member 2 and integrally fixed by a bolt 4, and the member 3 has the same horizontal direction from the vertical direction. The support piece is provided in a substantially U-shape so as to project in the direction. The base member 2 forms a lower support piece of the machine body 1.
The member 3 is formed by welding on the base member 2 two side walls 5 and 6 having an inverted L shape having vertical sides 5A and 6A and horizontal pieces 5B and 6B so as to stand upright with a space therebetween. A large connecting wall plate 7 is erected on the member 2 so as to connect the two side wall plates 5 and 6, and is welded to the base member 2 and the two side wall plates 5 and 6 to form the side wall plates 5 and 6. The horizontal pieces 5B and 6B form an upper support piece of the machine body 1. Then, on the base member 2 forming the lower supporting piece of the machine body 1, a mounting portion IC for mounting a workpiece (not shown) is formed on the side facing the horizontal pieces 5B, 6B forming the upper supporting piece. . Further, between the horizontal sides 5B, 6B forming the upper support piece, the horizontal wall 5B, 6B and the horizontal wall 5B, 6B so as to be connected by two connecting wall plates 9A, 9B having the same vertical length. While being welded to 6B, a quadrangular frame member 10 is welded to lower portions of the horizontal sides 5B and 6B and the connecting wall plates 9A and 9B to form a cavity 11 penetrating in the vertical direction, and has an operating portion. Reference numeral 8 denotes a large cavity, which is formed inside the machine body 1 by the base member 2, the vertical sides 5A and 6A of the side wall plates 5 and 6, and the large connecting wall plate 7, and opens upward and rightward in FIG. . A hydraulic cylinder 13 is a piston rod 15 having a mounting portion 14 for mounting tools such as caulking tools, press-fitting tools, and drilling tools (not shown).
Is arranged in the cavity 11 with the tip of the. The hydraulic cylinder 13 is made up of four tie rods 16 which are arranged on the outer periphery of the cylinder tube 13A with a space therebetween.
A square-shaped head portion 13B and a rod portion 13C are fixed to both ends of A, and a square-shaped flange 17 which is attached to the rod portion 13C located at the lower portion of the cavity 11 with four bolts 16 has four bolts. By attaching to the frame member 10 with 18, the rod part
13 is fixed to the upper support piece of the machine body 1. Inside the cylinder tube 13A of the hydraulic cylinder 13, the piston rod 15
The piston 19 is slidably fitted and inserted into a head chamber 20A and a rod chamber 20B. Reference numeral 21 denotes a quadrangular guide portion that is located above the rod portion 13C of the hydraulic cylinder 13 and above the cavity 13 between the head portion 13B and the hydraulic cylinder 13. The movement is allowed in the direction and the movement in the lateral direction is blocked.
The guide portion 21 forms flange portions 21A and 21B protruding in the lateral direction in FIG. 2, and a bolt 24 is provided on each flange portion. Reference numeral 22 is a pipe for communicating between the rod chamber 20B and the flow passage 21B formed in the guide portion 21, and both ends thereof are provided with the rod portion 13C and the guide portion.
It is fitted liquid-tightly with 21 so that it can move in the vertical direction.
Reference numeral 23 is a pipe that communicates between the head chamber 20A and the flow passage 21A formed in the guide portion 21, and both ends are liquid-tightly fitted to the head portion 13B and the guide portion 21 so as to be vertically movable. . And both pipes
Since the pipes 22, 23 are provided so as to be movable in the vertical direction, the pipes 22, 23 do not prevent the guide portion 21 from moving in the vertical direction. Reference numeral 25 is a rectangular parallelepiped-shaped manifold, and a plurality of control valves 26 stacked on the upper surface and a flow passage formed inside as described later form a hydraulic circuit for controlling the operation of the hydraulic cylinder 13. . In the manifold 25, the control valve 26 is provided with a substantially L-shaped member 27 on each of two side surfaces that are substantially orthogonal to the upper surface of the laminated installation.
By attaching the vertical portions of A and 27B with bolts 28 and attaching the horizontal portions of the substantially L-shaped members 27A and 27B to the upper portions of the side wall plates 5 and 6 with bolts 29, the upper support piece of the machine body 1 is It is fixedly attached to the upper part to be formed. The manifold 25 and the control valve 26 form a valve device 26A. Further, the manifold 25 is provided in contact with the side surface of the guide portion 21 of the hydraulic cylinder 13 on which the flange portions 21A and 21B are formed.
It is fixed to the guide portion 21 by screwing the bolts 24 provided on the 1A and 21B. As shown in detail in FIG. 5, the upper surface of the manifold 25 and the plurality of control valves 26 installed are formed by stacking a check valve 30, a counterbalance valve 31 with a check valve, and an electromagnetic switching valve 32. Is a hydraulic pump that serves as a hydraulic pressure source.
A discharge flow path 35 that connects the discharge pipe 34 from 33 to the supply port of the electromagnetic switching valve 32, a return pipe 37 to a liquid tank 36 that stores the working liquid on the low pressure side, and a discharge port of the electromagnetic switching valve 32. A first load communicating between the discharge flow path 38 communicating with the first load port of the electromagnetic switching valve 32 and the head chamber 20A of the hydraulic cylinder 13 via the flow path 21A and the pipe 23 shown in FIGS. 3 and 4. Flow path 39, second load port of solenoid switching valve 32, and hydraulic cylinder
The flow path 21 shown in FIGS. 3 and 4 is between the rod chambers 20B of 13
B, to form a second load flow path 40 that communicates via the pipe 22,
Further, a relief valve 41 is provided between the supply passage 35 and the discharge passage 38. 42 is an electric motor that drives the hydraulic pump 33, and 43 is a suction pipe that connects the hydraulic pump 33 and the liquid tank 36. 44 is a mounting plate having a hook portion 44A formed in the upper portion,
As shown in the figure, the liquid tank 36 is welded to the lower flat surface of the hook portion 44A, and the hydraulic pump is attached to the lower flat surface of the liquid tank 36.
An electric motor 42 in which 33 is integrally connected is attached in a state in which the hydraulic pump 33 is directed downward.

Then, the mounting plate 44 hooks the hook portion 44A onto the upper end surface of the side wall plate 5 to attach the hook portion 44A to the hydraulic pump 33, the liquid tank 36,
An electric motor 42 is arranged in the large cavity 8 of the machine body 1. 36A is a working liquid supply port of the liquid tank 36, and 36B is a working liquid discharge port of the liquid tank 36.

Next, the operation of this configuration will be described.

The illustrated state shows the operation stopped state in which the piston rod 15 of the hydraulic cylinder 13 is located at the rising end. From this state, when the electromagnetic switching valve 32 is operated to switch to the left position, the liquid discharged from the hydraulic pump 33 is discharged into the pipe 34, the supply passage 35, the electromagnetic switching valve 32, the first load passage 39, the passage 21A, It flows through the pipe 23 and flows into the head chamber 20A of the hydraulic cylinder 13,
Is the rod chamber 2 due to the action of the discharge liquid flowing into the head chamber 20A.
A differential circuit is formed in which the liquid of 0B flows through the pipe 23, the flow passage 21B, the second load flow passage 40, the check valve 30 and flows out to the supply flow passage 35 side, and the piston rod 15 descends at high speed. When the piston rod 15 descends until it comes into contact with a workpiece (not shown) mounted on the mounting portion 1C, and the pressure of the discharge flow of the inflow into the head chamber 20A becomes equal to or higher than the set pressure of the counterbalance valve 31 with a check valve, The hydraulic cylinder 13 includes a counterbalance valve 31 with a check valve, a solenoid switching valve 32, and a discharge flow path 3 for the liquid in the rod chamber 20B.
8. The return pipe 37 is made to flow and discharged to the liquid tank 36, and the piston rod 15 descends to pressurize the workpiece by the action of the discharged liquid flowing into the head chamber 20A. The pressure applied during pressure processing is set by the relief valve 41. When the pressure processing is completed, the electromagnetic switching valve 32 is switched to the right position. The liquid discharged from the supply channel 35 is an electromagnetic switching valve 32, a counterbalance valve 31 with a check valve, a second load channel 40, a channel 21B,
The liquid in the head chamber 20A flows through the pipe 22 into the rod chamber 20B of the hydraulic cylinder 13, and the hydraulic cylinder 13 causes the liquid in the head chamber 20A to flow through the pipe 23, the flow passage 21A, and the first passage by the action of the discharged liquid flowing into the rod chamber 20B.
The piston rod 15 rises while flowing through the load flow path 39, the electromagnetic switching valve 32, the discharge flow path 38, and the return pipe 37 and discharging to the liquid tank 36. When the piston rod 15 rises to the rising end in the illustrated state, the electromagnetic switching valve 32 is switched to the neutral position in the illustrated state and the operation is stopped.

With this operation, when the workpiece is pressed by the action of the discharged liquid flowing into the head chamber 20A of the hydraulic cylinder 13, the reaction force of the pressing force causes the tie rod 16 of the hydraulic cylinder 13 to extend upward. Even if it works, tie rod 16 and tie rod 16
The guide portion 21 that fits in the vertical movement and allows the movement in the vertical direction and prevents the movement in the lateral direction becomes relatively movable, and the hydraulic cylinder 13 has the flange provided on the rod portion 13C located in the lower portion of the cavity 11. 17 is attached to the frame member 10 with four bolts 18 to fix the rod portion 13C to the upper support piece of the machine body 1, and the guide portion 21 to the manifold 25 of the valve device 26A fixed to the machine body 1. Since the hydraulic cylinder 13 is supported at two points, the hydraulic cylinder 13 can be supported at two points without the upward extension effect due to the reaction force of the pressing force when the workpiece is pressed, and the hydraulic cylinder 13 can be supported at two points. A good fixation of the hydraulic cylinder can be obtained without the vertical extension of 13 affecting the fixation points. Further, the guide portion 21 of the hydraulic cylinder 13 is fixed to the manifold 25 of the valve device 26A fixed to the machine body 1 to connect the flow passages 21A and 21B of the guide portion 21 and the flow passages 39 and 40 formed in the manifold 25. Therefore, it is possible to fix the guide portion 21 of the hydraulic cylinder 13 without using a special member, and without making the structure of the machine body 1 complicated and large in size, and the flow path of the guide portion 21. 21A, 21B and the channels 39, 40 of the manifold 25 can be communicated with each other without the need for piping, and the production cost is not increased.

In one embodiment, the guide portion 21 is provided above the rod portion 13C of the hydraulic cylinder 13 and between the head portion 13B, but the vertical length of the hydraulic cylinder is shortened so that the head portion is inside the cavity. It is also possible that the tie rod is extended from the head portion so as to project upward from the head portion, and the extended tie rod is fitted with the guide portion.

[Effect of device]

As described above, according to the present invention, the head portion and the rod portion are fixed to both ends of the cylinder tube in which the piston fixed to the piston rod to which the tool is attached at the tip is slidably inserted, and the inside is divided into the head chamber and the rod chamber. A machine body having a partitioned hydraulic cylinder and a machine body provided with a substantially U-shaped configuration in which vertically extending members are vertically spaced from each other and supporting pieces are formed to project in the same horizontal direction. The lower support piece has a mounting portion on the side facing the upper support piece for mounting a work piece, and the upper support piece has a hydraulic cylinder in a cavity formed vertically through the piston. The rod end is arranged downward, and a hydraulic circuit for controlling the operation of the hydraulic cylinder is provided by configuring a valve device in which a plurality of control valves are stacked on the upper surface of a manifold having a flow passage formed therein, Place the valve device manifold on the machine body. It is fixedly arranged in the upper part that forms the holding piece, the rod part located in the lower part of the cavity of the hydraulic cylinder is fixed to the upper support piece of the machine body, and the head part is not fixed to the machine body. There is a guide part above the rod part that is fixed to the upper support piece of the machine body that allows vertical movement and prevents lateral movement.The guide part communicates with the head chamber and rod chamber. Is formed inside, and the guide part is fixed to the manifold of the valve device that is fixed to the machine body to connect the flow path of the guide part and the flow path of the manifold. It is possible to support the hydraulic cylinders at two places without the stretching action affecting the fixed places, and to obtain good fixation of the hydraulic cylinders.

Further, since the flow passage of the guide portion and the flow passage of the manifold are communicated by being fixed to the manifold of the valve device that is fixed to the machine body of the guide portion of the hydraulic cylinder, the guide portion of the hydraulic cylinder is fixed. It is possible to do without using a special member, and without making the structure of the machine body complicated and large,
The flow path of the guide portion and the flow path of the manifold can be communicated with each other without requiring piping, and the manufacturing cost can be prevented from increasing.

[Brief description of drawings]

The drawing shows an embodiment of the present invention, and FIG.
FIG. 2 is a cross-sectional view taken along the line I-I of FIG.
Fig. 3 is a partial sectional view taken along line III-III in Fig. 1, Fig. 4 is an enlarged partial sectional view taken along line IV-IV in Fig. 3, and Fig. 5 is hydraulic pressure. It is a circuit diagram. 1 ... Machine body, 1C ... Mounting part, 11 ... Cavity, 13 ... Hydraulic cylinder, 13C ... Rod part, 15 ... Piston rod, 21 ... Guide part, 26A ... Valve device.

Claims (1)

[Scope of utility model registration request] 1. A head part and a rod part are fixed to both ends of a cylinder tube in which a piston fixed to a piston rod for attaching a tool to the tip is slidably inserted, and the inside is divided into a head chamber and a rod chamber. It has a hydraulic cylinder and a machine body that is provided in a substantially U-shape and has a supporting piece projecting in the same horizontal direction with a gap vertically from the top and bottom of vertically arranged members. A mounting portion for mounting a workpiece is formed on the side of the piece opposite to the upper support piece, and the upper support piece has a hydraulic cylinder in a cavity formed by penetrating in the vertical direction inside the upper support piece. A valve circuit that controls the operation of the hydraulic cylinder is provided with a valve device that is arranged downward and that has a plurality of control valves stacked on the upper surface of a manifold that has a flow passage formed inside. Manifold the upper support piece of the machine body The rod section located below the cavity of the hydraulic cylinder is fixed to the upper support piece of the machine body and the head section is not fixed to the machine body. There is a guide portion above the rod portion fixed to the support piece to enable movement in the vertical direction and prevent movement in the lateral direction, and the guide portion has a flow path communicating with the head chamber and the rod chamber. A hydraulically operated pressurizing machine which is formed inside and has a guide section fixed to a manifold of a valve device fixed to a machine body to connect a flow path of the guide section and a flow path of the manifold.