JPH0641753Y2 - 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.

[Conventional technology]

The applicant of this type of hydraulically actuated press machine
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. The lower support piece is provided with a mounting portion for mounting a work piece on the side facing the upper support piece, and the upper support piece is mounted with a tool in a cavity formed vertically through the upper support piece. The hydraulic cylinder is arranged with the tip of the piston rod facing downward, and the control valve is installed to form a hydraulic circuit by stacking the control valve on the manifold equipped with the hydraulic cylinder in the machine body. The piston rod of the pressure cylinder descends so that the workpiece mounted on the mounting portion can be pressure-processed by a tool attached to the tip of the piston rod.

[Problems to be solved by the invention]

However, since the hydraulic cylinder is a single fixation for fixing the rod portion located in the lower part of the cavity to the upper support piece of the machine body, if the pressure force when pressurizing the workpiece is increased,
Due to the reaction force of the pressing force caused by the misalignment between the tool at the tip of the piston rod and the work piece mounted on the mounting part of the lower support piece, the hydraulic cylinder twists and displaces around the fixed point and the fixed point is damaged. It is necessary to firmly fix the hydraulic cylinder to the upper support piece so that the hydraulic cylinder does not come into contact with the upper support piece. Therefore, if the hydraulic cylinder is fixed at two points, the structure of the upper support piece becomes complicated and has a large shape. There was a problem that caused it.

The present invention solves such a problem by fixing hydraulic cylinders at two positions without complicating the structure of the upper support piece of the machine body and increasing the size of the machine body. The present invention provides a hydraulically actuated pressure processing machine that is obtained.

[Means for solving problems]

For this reason, in the present invention, the piston is fixed to the piston rod to which a tool is attached at the tip, the inside is divided into the head chamber and the rod chamber, and the head portion is provided on the head chamber side and the rod portion is provided on the rod chamber side. 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 vertically through the piston rod tip. Place it downwards,
A hydraulic circuit for controlling the operation of the hydraulic cylinder is constructed by a valve device in which a plurality of control valves are stacked on the upper surface of a manifold with a flow passage formed inside, and the manifold of the valve device is provided on the upper support piece of the machine body. The hydraulic cylinder is fixedly attached to the upper support piece of the machine body, and the head portion is fixed to the manifold of the valve device fixed to the machine body. A flow path inside the manifold is connected to the head chamber through the head portion of the hydraulic cylinder.

[Action]

In the structure of the present invention, the manifold of the valve device constituting the hydraulic circuit for controlling the operation of the hydraulic cylinder is fixedly arranged in the upper part where the upper support piece of the machine body is formed, and the hydraulic cylinder is installed in the lower part of the cavity. The positioned rod portion is fixed to the upper support piece of the machine body, and the head portion is fixed to the manifold of the valve device fixed to the machine body so as to be fixed at two locations. For this reason, the head portion of the hydraulic cylinder can be fixed without using a special member, and the strong fixation of the hydraulic cylinder can be obtained without making the structure of the upper support piece complicated and large.

〔Example〕

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

In FIGS. 1 to 4, reference numeral 12 denotes a machine body, in which an inverted L-shaped member 9 is vertically arranged on a base member 11 and bolts are provided.
The support pieces are integrally fixed by means of 13, and the support pieces are provided in a substantially U-shape so as to project from above and below the member 9 in the same horizontal direction.
The base member 11 forms a lower support piece of the machine body 12. The member 9 is formed by welding two side walls 15 and 16 having an inverted L shape having vertical pieces 15A and 16A and horizontal pieces 15B and 16B on a base member 11 so as to stand upright with a space between each other. A large connecting wall plate 18C is erected so as to connect between the two side wall plates 15 and 16 on the member 11, and is constructed by welding to the base member 11 and the two side wall plates 15 and 16, and the side wall plates 15 and 16 are The horizontal pieces 15B and 16B form an upper support piece of the machine body 12. The base member 11 forming the lower supporting piece of the machine body 12 is formed with a mounting portion 12C for mounting a workpiece (not shown) on the side facing the horizontal pieces 15B and 16B forming the upper supporting piece. Further, between the horizontal pieces 15B and 16B forming the upper support piece, the horizontal wall pieces 18A and 18B are connected to each other so that the horizontal piece 15B and 16B are connected by two connecting wall boards 18A and 18B having the same vertical length.
Welded to 15B and 16B, horizontal pieces 15B and 16B, connecting wall plate
A quadrangular frame member 19 is welded to the lower portions of 18A and 18B to form a cavity 20 penetrating in the vertical direction and has an operating portion. Reference numeral 21 is a large cavity, which is the vertical side 15A, 16 of the base member 11, the side wall plates 15, 16.
A, it is formed inside the machine body 12 by the large connecting wall plate 18C and opens upward and rightward in FIG. A hydraulic cylinder 22 is arranged in the cavity 20 with the tip of a piston rod 24 having a mounting portion 23 for mounting a tool such as a caulking tool, a press-fitting tool, and a punching tool not shown facing downward. Hydraulic cylinder 22
Is formed by partitioning the inside into a head chamber 44A and a rod chamber 44B by a piston 44 fixed to the piston rod 24.
The A side has a square head portion 22C, the rod chamber 44B side has a square rod portion 22A, and the rod portion 22A located in the lower portion of the cavity 20 has a square flange 22B and four bolts 25. The rod portion 22A is fixed to the upper support piece of the machine body 12 by being attached to the frame member 19 by the head portion 22C.
Is located above the cavity 20. Further, the hydraulic cylinder 22 has a small cylinder portion 26 connected to the head portion 22C, and the small cylinder portion 26 is fixed to a piston 45 provided inside and a piston rod 46 protruding downward is fixed to a piston 44. At the same time, the piston 45 divides the interior into a head chamber 45A and a rod chamber 45B. 27 is a rectangular parallelepiped manifold, which constitutes a hydraulic circuit for controlling the operation of the hydraulic cylinder 22 by a plurality of control valves 28 stacked on the upper surface and a flow path formed inside described later, and the control valve 28 As shown in detail in FIG. 5, the two bolts 30 are attached to the two side surfaces that are substantially orthogonal to the upper surface of the installation via the long holes 29C formed in the vertical portions of the substantially L-shaped members 29A and 29B, respectively. The substantially L-shaped member 29
The horizontal portions of A and 29B are attached to the upper portions of the side wall plates 15 and 16 by two bolts 31, respectively, so that they are fixedly arranged at the upper portion forming the upper support piece of the machine body 12. The manifold 27 and the control valve 28 form a valve device 28A.
Further, the manifold 27 extends to a position above the cavity 20 and is provided in contact with one side surface of the head portion 22C of the hydraulic cylinder 22, and the contact portion is expanded in the left-right direction in FIG.
27A is formed, and four bolts 32 are screwed into the head portion 22C of the hydraulic cylinder 22 by penetrating the expanded portion 27A, thereby being fixed to the head portion 22C of the hydraulic cylinder 22. Manifold 2
As shown in detail in FIG. 6, a plurality of control valves 28 installed on the upper surface of 7 include a counterbalance valve 47 with a check valve and an electromagnetic switching valve.
First valve group consisting of 48 and pressure switch 49 and check valve 50
And a solenoid operated directional control valve 51. A second valve group and a pilot operated check valve 52 are stacked. Inside the manifold 27, the discharge pipe 40 from the hydraulic pressure pump 35 serving as a hydraulic pressure source and the supply of the electromagnetic directional control valve 51. First supply flow path 53, which connects the ports, the first supply flow path
A second supply flow path 54 that branches from 53 and communicates with the supply port of the electromagnetic switching valve 48, a return pipe 41 to the liquid tank 34 that stores the working liquid on the low pressure side, and a discharge port of the electromagnetic switching valve 51 that communicate with each other. A first discharge flow passage 55, a second discharge flow passage 56 that branches from the first discharge flow passage 55 and communicates with the discharge port of the electromagnetic switching valve 48,
A first load flow passage 57 that connects the first load port of the electromagnetic switching valve 48 and the rod chamber 45B of the small cylinder portion 26 of the hydraulic cylinder 22 via the first load pipe 42, and the second load of the electromagnetic switching valve 48. The second load pipe 43 between the port and the head chamber 45A of the small cylinder 26
Through the second load flow path 58 and the electromagnetic switching valve 51
A pilot flow path 59 that communicates between the load port and the pilot port of the pilot operated check valve 52, and a load flow path 60 that communicates between the second load port of the electromagnetic switching valve 51 and the free flow blocking port of the pilot operated check valve 52. , A third discharge flow path 61 branched from the first discharge flow path 55 and communicating with the free flow port of the pilot operated check valve 52, and a branch from the load flow path 60 and connected to the head chamber 44A of the hydraulic cylinder 22. Cylinder flow path 6
2, forming. 63 is the rod chamber 44B of the hydraulic cylinder 22
Is a pipe connecting the liquid tank 34 and the liquid tank 34, and 39 is a suction pipe connecting the liquid tank 34 and the hydraulic pump 35. The flow path 62 formed inside the manifold 27 communicates with the head chamber 44A via the head portion 22C without requiring piping, as shown in detail in FIG. Reference numeral 33 is a mounting plate having an upper portion bent to the right in FIG. 2 to form a hook portion 33A. The liquid tank 34 is welded to the flat surface of the hook portion 33A downward and the liquid tank 34 is flat downward. An electric motor 36, to which a hydraulic pump 35 is integrally connected, is attached by a bolt 37 with the hydraulic pump 35 facing downward. The mounting plate 33 hooks the hook portion 33A on the upper end surface of the side wall plate 15, and is fixed to the side wall plate 15 by a bolt 38 penetrating the side wall plate 15 and screwed into a flat surface.
34, the hydraulic pump 35, and the electric motor 36 are arranged in the large cavity 21 of the machine body 12. 34A is the working liquid supply port of the liquid tank 34, 34B
Is a working liquid discharge port of the liquid tank 34.

Next, the operation of this configuration will be described.

The sixth illustrated state shows the operation stopped state in which the piston rod 24 of the hydraulic cylinder 22 is located at the rising end. From this state, when the electromagnetic switching valve 48 is switched to the right position and the electromagnetic switching valve 51 is switched to the left position, the liquid discharged from the hydraulic pump 35 is discharged from the discharge pipe 40, the first supply passage 53, and the second supply passage 54. , Solenoid switching valve 4
8, flowing through the second load flow passage 58, the second load pipe 43 into the head chamber 45A of the small cylinder portion 26 of the hydraulic cylinder 22, and from the first supply flow passage 53 to the electromagnetic switching valve 51, the pilot flow passage
Flow through 59 and flow into the pilot port of pilot operated check valve 52. The hydraulic cylinder 22 is operated by the discharge liquid flowing into the head chamber 45A of the small cylinder portion 26.
The liquid in the rod chamber 45B of the first load pipe 42, the first load flow path 5
7, the pressure is controlled by the counterbalance valve 47 with a check valve, and the electromagnetic switching valve 48, the second discharge passage 56, the first discharge passage 55,
The piston rod 24 descends while flowing the return pipe 41 and discharging it to the liquid tank 34. The liquid in the liquid tank 34 is returned to the head chamber 44A whose volume is increased by lowering the piston rod 24, the return pipe 41, the first discharge flow passage 55, the third discharge flow passage 61, the pilot operation check valve 52, and the load flow passage 60. The liquid in the rod chamber 44B flows through the pipe 63 and flows into the liquid tank 34.
Is discharged to. When the piston rod 24 descends until it comes into contact with a workpiece (not shown) mounted on the mounting portion 12C, the electromagnetic switching valve 51 is switched to the right position. The liquid discharged from the first supply channel 53 is an electromagnetic switching valve 51, a check valve 50, a pressure switch 49,
The hydraulic cylinder 22 flows through the load flow passage 60 and the flow passage 62 and flows into the head chamber 44A, and the hydraulic cylinder 22 operates by the action of the discharge liquid flowing into the head chamber 44A and the action of the discharge liquid flowing into the head chamber 45A of the small cylinder portion 26. The work piece is pressure processed. When the completion of the pressure processing is confirmed by the pressure switch 49 which operates when the pressure of the discharge liquid flowing into the head chamber 44A reaches the set pressure, the solenoid switching valve 51
Switch to the left position. The liquid discharged from the first supply flow path 53 flows through the electromagnetic switching valve 51 and the pilot flow path 59 and acts on the pilot port of the pilot operation check valve 52, and the pilot operation check valve 52 opens to operate the hydraulic cylinder 22. Head room
44A is a cylinder flow path 62, a load flow path 60, a pilot operated check valve 52, a third discharge flow path 61, a first discharge flow path 55, a return pipe
The pressure in the head chamber 44A is reduced by communicating with the liquid tank 34 via 41. When the pressure switch 49 confirms that the pressure in the head chamber 44A has dropped below the set pressure, the solenoid switching valve 48
Switch to the left position. The liquid discharged from the first supply passage 53 flows through the second supply passage 54, the electromagnetic switching valve 48, the counter balun valve 47 with a check valve, the first load passage 57, and the first load pipe 42, and the small cylinder portion 26. Into the rod chamber 45B of the hydraulic cylinder 22
Is the second load pipe 43, the second load flow path 58, the electromagnetic switching valve 48, the second discharge flow due to the action of the discharge liquid flowing into the rod chamber 45B of the small cylinder portion 26. Liquid tank by flowing the passage 56, the first discharge passage 55, and the return pipe 41
The piston rod 24 rises while discharging to 34. As the piston rod 24 rises, the liquid tank 34 is placed in the rod chamber 44B.
Liquid flows in through the pipe 63, and the liquid in the head chamber 44A flows through the flow passage 62, the load flow passage 60, and the pilot operation check valve for opening operation.
The liquid flows through 52, the third discharge flow path 61, the first discharge flow path 55, and the return pipe 41 and is discharged to the liquid tank 34. When the piston rod 24 moves up to the rising end in the sixth illustrated state, the electromagnetic switching valves 48, 51
Is switched to the neutral position of the sixth illustrated state to stop the operation.

By such an operation, the hydraulic cylinder 22 attaches the flange 22B of the rod portion 22A located in the lower portion of the cavity 20 to the frame member 19 with the four bolts 25 so that the rod portion 22A is supported by the upper support piece of the machine body 12. The head portion 22C located above the cavity 20 is fixed to the upper portion forming the upper support piece of the machine body 12 and is brought into contact with the expanded portion 27A of the manifold 27 fixedly attached to screw the bolt 32. Since it is fixed to the manifold 27 at two positions by fixing it to the manifold 27, the head portion 22C of the hydraulic cylinder 22 can be fixed without using a special member,
It is possible to firmly fix the hydraulic cylinder 22 without making the horizontal pieces 15B and 16B and the connecting wall plates 18A and 18B that form the upper support pieces complicated and large in size. Also, hydraulic cylinder 22
Since the head portion 22 is fixed to the manifold 27 of the valve device 28A and the flow passage 62 inside the manifold 27 is communicated with the head chamber 44A via the head portion 22, piping is required between the manifold 27 and the head chamber 44A. It is possible to communicate without needing to increase the production cost. In addition, hydraulic cylinder 22
By obtaining the strong adhesion of the work piece, it is possible to increase the pressing force when the work piece is subjected to the pressure work and perform the good pressure work, and it can be applied to a wide range of applications. Furthermore, the liquid tank 34, the hydraulic pump 35, and the electric motor 36 are arranged in the large cavity 21 inside the machine body 12, and the external shape is different from the conventional one in which the hydraulic tank and the electric motor are exposed to the outside. Can be refreshed. Moreover, the liquid tank 34, the hydraulic pump 35,
The electric motor 36 is attached to a single mounting plate 33, and the mounting plate 33 has a hook portion 33A formed on the upper portion thereof hooked on the upper end surface of the side wall plate 15 to enlarge the liquid tank 34, the hydraulic pump 35, and the electric motor 36. Cavity 21
Since it can be placed in the large cavity 21, it can be easily placed in the large cavity 21.

In one embodiment, the hydraulic cylinder 22 has a small cylinder portion 26
The head chamber is provided without the small cylinder 26.
The discharge liquid flows into 44A and the liquid in the rod chamber 44B is discharged to lower the piston rod 24. The discharge liquid flows into the rod chamber 44B and the liquid in the head chamber 44A is discharged to raise the piston rod 24. However, of course there are good things.

[Effect of device]

As described above, according to the present invention, the piston is fixed to the piston rod to which the tool is attached at the tip, the interior is divided into the head chamber and the rod chamber, and the head portion is provided on the head chamber side and the rod portion is provided on the rod chamber side. The hydraulic cylinder and a machine body that is provided in a substantially U-shape with the support pieces projecting in the same horizontal direction at intervals from the top and bottom of the vertically arranged member, and A mounting portion for mounting a workpiece is formed on the side of the supporting piece that faces the upper supporting piece,
In the upper support piece, a hydraulic cylinder was placed in a cavity formed through the inside in the vertical direction with the tip of the piston rod facing downward, and multiple control valves were stacked on the upper surface of the manifold in which the flow passage was formed. The valve device constitutes a hydraulic circuit for controlling the operation of the hydraulic cylinder, and the manifold of the valve device is fixedly arranged at the upper portion forming the upper support piece of the machine body.
The hydraulic cylinder is provided with the rod part located in the lower part of the cavity fixed to the upper support piece of the machine body, and the head part fixed to the manifold of the valve device fixed to the machine body. By communicating with the head chamber through the head of the cylinder, the head of the hydraulic cylinder can be fixed without using a special member, without complicating the structure of the upper support piece of the machine body and increasing its size. It is possible to obtain firm fixation of the hydraulic cylinder.

Further, since the head part of the hydraulic cylinder is fixed to the manifold of the valve device and the flow path inside the manifold is communicated with the head chamber through the head part, the manifold and the head chamber can be communicated without requiring piping. Therefore, it can be done without increasing the production cost. Further, since the liquid cylinder is firmly fixed, it is possible to increase the pressurizing force at the time of press working the work piece and perform good press working, which has the effect of being applicable to a wide range of applications. .

[Brief description of drawings]

The drawing shows an embodiment of the present invention, and FIG. 1 is a line I- of FIG.
A sectional view taken along line I, FIG. 2 is a sectional view taken along line II in FIG. 1, and FIG. 3 is a sectional view taken along line III-III in FIG.
The drawing is a partially enlarged sectional view taken along the line IV-IV in FIG. 3, FIG. 5 is a partially enlarged view seen from the arrow V in FIG. 2, and FIG. 6 is a hydraulic circuit diagram. 11 …… Basic member, 12 …… Machine body, 12C …… Mounting part, 15
B, 16B: Horizontal piece, 20: Hollow, 22: Hydraulic cylinder,
22A: Rod part, 22C: Head part, 28A: Valve device.

Claims (1)

[Scope of utility model registration request] 1. A hydraulic pressure having a piston fixed to a piston rod to which a tool is attached at a tip thereof to divide the inside into a head chamber and a rod chamber to form a head portion on the head chamber side and a rod portion on the rod chamber side. The machine includes a cylinder and a machine body that is provided in a substantially U-shape by vertically projecting support pieces in the same horizontal direction from above and below the vertically arranged members, and A mounting portion for mounting a workpiece is formed on the side facing the upper support piece, and a hydraulic cylinder is installed in a cavity formed in the upper support piece in the vertical direction so that the tip of the piston rod is lowered. The valve device that is arranged in the direction of the valve and has a plurality of control valves stacked on the upper surface of the manifold that has a flow passage formed inside to form a hydraulic circuit that controls the operation of the hydraulic cylinder is provided. Form the upper support piece of the machine body The hydraulic cylinder is fixedly arranged in the upper part, and the rod part located in the lower part of the cavity is fixed to the upper supporting piece of the machine body, and the head part is fixed to the manifold of the valve device fixed to the machine body. A hydraulic actuated pressure processing machine in which the internal flow path is connected to the head chamber via the head section of the hydraulic cylinder.