JPH0353079B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention belongs to the field of press machines, and particularly relates to a lubricating oil circulation method for a post guide press machine.

(Prior art) As shown in Fig. 2, a post guide press machine is provided with a crankshaft b in a crown part a.
A piston mechanism d at the lower end of the cooking rod c is attached to a ram e, so that the ram e moves up and down as the crankshaft b rotates. Further, guide posts f are fixed to the four corners of the ram e, and the guide posts f are slidably supported in a hole h formed in the bed g, and the ram e is smoothly moved along the hole h. It is designed to move.

In such a post guide press machine, if thermal deformation occurs in various parts due to friction etc., the shaft height H will be distorted and press accuracy will decrease. We are trying to prevent a decline in However, regarding the cooling of the ram e and the vicinity of the bed g, conventionally lubricating oil has been supplied only to the sliding part between the guide post f and the hole h of the bed g, so the cooling effect is not necessarily sufficient. Ta.

In such a post guide press machine, when the temperature of the ram increases due to heat conduction from the guide post, a temperature difference occurs between the ram and the bed.
There was a drawback that the precision of the pressed product would be disrupted if it was partially deformed. Further, if an error occurs in the shaft height due to a change in ambient temperature, the product accuracy cannot be maintained constant in this case as well.

(Problems to be Solved by the Invention) The present invention has been made to solve the above-mentioned conventional disadvantages, and improves processing accuracy by ensuring thermal balance of the press machine, and also improves processing accuracy due to the environment. The purpose of the present invention is to provide a lubricating oil circulation method for a post guide press machine that can quickly respond to temperature changes.

(Means for solving the problem) A connecting rod is attached to the crankshaft in the crown, the piston mechanism of this connecting rod is attached to the ram, and a guide post fixed to the corner of this ram is provided in the bed. In a lubricating oil circulation method for supplying lubricating oil to a post guide press machine that is slidably supported in a guide hole, a hole is provided inside the guide post along the axial direction, and the hole and the inside of the ram and A discharge port is provided in the bed and a discharge pipe is connected to the bed, a circulation pump and a heat exchanger are connected to the discharge pipe, and the heat exchanger and the ram are connected by a supply pipe. At the same time, by connecting branch pipes branched from the supply pipe to the guide holes of the bed, a circulation path for lubricating oil is formed, and the lubricating oil is circulated from the piston mechanism of the ram to the hole of the guide post or to the guide hole. The gist is to take out the supplied lubricating oil from the discharge port of the bed, cool the lubricating oil to an appropriate temperature in the heat exchanger, and then supply it again to the ram and guide hole from the supply pipe and branch pipe. It is something.

This not only allows lubricating oil to be supplied to the sliding parts of the guide post and the guide hole of the head, but also allows lubricating oil to be supplied from the ram's piston mechanism through the guide post hole and bed. By uniformly cooling the entire surface of the inner wall of the guide post and the hollow inner wall of the guide post to an appropriate temperature, thermal balance of the post guide press machine can be ensured and processing accuracy can be improved.

(Embodiment) Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawing, 1 is a ram of a post guide press machine, and guide posts 3 are attached to the four corners of the ram via stays 2. Inside it is a hole 3a.
are provided along the axial direction. This hole 3a communicates with the inside 1a of the ram 1 via a through hole 2a provided inside the stay 2. Reference numeral 4 denotes a bed, and guide holes 4a are provided at the four corners of the upper part, and the guide post 3 of the ram 1 is slidably fitted into the guide hole, and the hole 3a and the inside 4b of the bed 4 are connected to each other. are communicating.
Reference numeral 5 designates a discharge pipe, one end of which is connected to the discharge port 4c of the bed 4, and the other end connected to the circulation pump 6. Further, the discharge pipe 5 branches in the middle, and the branch pipe 5a is connected to the control means 7. The control means 7 quickly detects when the temperature of the lubricating oil changes due to a change in the outside temperature or heat generation of the press machine, and controls the motor 8 of the circulation pump 6 and the heat exchanger connected to the circulation pump 6. It is designed to control the device 9. The heat exchanger 9 and the ram 1 are connected by a supply pipe 10, and this supply pipe 10 branches in the middle, and the branch pipe 10a is connected to the bed 4.
The guide holes 4a of the lubricating oil are connected to each other, thereby forming a lubricating oil circulation circuit.

In this circulation circuit, lubricating oil is supplied to the supply pipe 1
When supplied from 0 to the inside 1a of ram 1, ram 1
It is cooled and sent from the through hole 2a of the stay 2 to the hole 3a of each guide post 3, flows down through this hole, flows into the interior 4b of the bed 4, and is discharged from the discharge port 4c to the discharge pipe 5. be done. Supply pipe 10
The lubricating oil supplied from the branch pipes 10a to the guide holes 4a of the bed 4 lubricates the guide post 3 and flows into the inside 4b of the bed 4. and is discharged from the discharge port 4c to the discharge pipe 5. Thereafter, the lubricating oil is sent to the heat exchanger 9 by the circulation pump 6, cooled to an appropriate temperature, and then supplied again from the supply pipe 10 to the ram 1 and the guide hole 4a.

By forcing the lubricating oil to circulate in this way, the temperature equilibrium of the ram 1 and the bed 4 is maintained, local deformation is prevented, and as a result, the processing accuracy of the press can be ensured.

(Effects of the Invention) As explained above, the present invention is a method of circulating lubricating oil between the ram and the bed using the guide post of the ram, so it is very direct and rational, and the method of circulating the lubricating oil between the ram and the bed is extremely direct and rational. Excellent effects such as maintaining thermal equilibrium and enabling highly accurate press working can be obtained.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention, FIG. 2 is a schematic sectional view of a conventional post guide press machine, and FIG. 3 is a partially cutaway side view of the lower half thereof. 1... Ram, 2... Stay, 3... Guide post, 3a... Hole, 4... Bed, 4a... Guide hole, 5... Discharge pipe, 6... Circulation pump, 7...
Control means, 8... Motor, 9... Heat exchanger, 10
...Supply pipe.

Claims (1)

[Claims] 1 A connecting rod is attached to the crankshaft in the crown, the piston mechanism of this connecting rod is attached to a ram, and a guide post fixed to a corner of this ram is slidably supported in a guide hole provided in the bed. In a lubricating oil circulation method for supplying lubricating oil to a post guide press machine, a hole is provided inside the guide post along the axial direction, and the hole is communicated with the inside of the ram and the inside of the bed, respectively. A discharge port is provided in the bed, a discharge pipe is connected to the discharge pipe, a circulation pump and a heat exchanger are connected to the discharge pipe, and a supply pipe is connected to the heat exchanger and the ram, and a supply pipe is branched from the supply pipe. By connecting branch pipes to the guide holes of the bed, a circulation path for lubricating oil is formed, and the lubricating oil supplied from the piston mechanism of the ram to the hole of the guide post or to the guide hole, respectively, is connected to the guide hole of the bed. The lubricating oil circulation of a post guide press machine is characterized in that the lubricating oil is taken out from the discharge port of the bed, cooled to an appropriate temperature by the heat exchanger, and then supplied again to the ram and the guide hole from the supply pipe and the branch pipe. Method.