JPH04130144U - Machine tool shaft core supply coolant device - Google Patents

Abstract

(57) [Summary] [Purpose] This is a shaft core supply coolant device that prevents cutting oil and fine chips contained therein from adhering to the tapered part of the spindle in machine tools that require high precision machining. The purpose is to prevent coolant and chips mixed in the coolant from flowing out other than the coolant supply path during replacement. [Structure] When the tool 2 with the coolant supply hole 9 drilled in the center is installed in the main spindle 1, the coolant supply section 6 at the rear of the tool can slide inside the tip of the eject rod 3 arranged in the main spindle 1. It comes into contact with the front end of the coolant supply pin 4 inserted into the coolant supply pin 4 and is pushed in. and coolant supply pin 4
slides inward of the eject rod 3 against the force of the spring 5. At this time, the coolant supply pin is always pressed by a spring against the coolant supply section at the rear of the tool. In this state, the coolant is supplied to the machining section from the coolant supply hole 8 on the spindle side through the coolant supply hole 9 on the tool side without flowing out of the coolant supply path.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to a shaft core supply coolant device for installed tools in machine tools. .

0002

[Conventional technology]

A conventional machine tool shaft core supply coolant device is installed on the main shaft 1, as shown in Figure 3. The coolant supply section 6 at the rear of the tool 2 to be attached and the coolant supply section on the spindle 1 side are separated. Because of this, the coolant is leaking to other areas other than the coolant supply path inside the main shaft. Ta. Note that 3 is the eject rod, 8 is the coolant supply hole on the spindle side, and 9 is on the tool side. Coolant supply holes are shown.

0003

[Problem that the idea aims to solve]

By the way, in the conventional shaft core supply coolant device as described above, there is no flow inside the main shaft 1. The coolant 10 that came out leaked out when the tool was removed during tool replacement, and the coolant Also, fine chips mixed in the coolant may get into the taper part of the tool 2 and spindle 1. Deterioration of machining accuracy due to variations in tool installation accuracy due to adhesion and damage to the tool and spindle taper. This caused damage to the equipment.

0004 In this invention, the coolant supply section at the rear of the tool and the coolant supply section on the spindle side are attached to the tool. This is an attempt to solve the above-mentioned problems by making the parts come in close contact with each other.

[0005]

[Means to solve the problem]

For this reason, the machine tool shaft core supply coolant device of the present invention is designed to Connect the coolant supply path that communicates with the coolant supply hole provided in the center of the tool to the main shaft. In machine tools that have a The end of the coolant supply path is configured to be able to come into contact with and separate from the end, and the tip of the coolant supply path is directed toward the tool. It is characterized by being energized.

[0006]

[Effect]

The shaft core supply coolant device of the present invention described above has a coolant supply disposed inside the main shaft. The tip of the feed channel is constructed so that it can be constantly biased in the pushing direction by, for example, a spring. As a result, when the tool is mounted on the spindle, the rear end of the tool is exposed to the coolant inside the spindle. The coolant supply channel is pressed against the tip of the coolant supply channel and is in close contact with the tip of the coolant supply channel. The supply hole communicates with the coolant supply path in the main shaft, and the coolant liquid flows through the coolant supply path. Prevent leakage to other places.

[0007] As a result, when changing tools, coolant is mixed with the tool and spindle taper part, etc. It is possible to prevent the adhesion of chips that have entered the machine and prevent damage to these parts.

[0008]

【Example】

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

[0009] Figure 1 is a cross-sectional view of the coolant supply section showing the state when no tool is attached to the spindle. , FIG. 2 shows a cross-sectional view of the state in which the tool is installed. First, in FIG. A coolant supply pin 4 is slidably inserted into the eject rod 3 located at the A force is applied in the direction of pushing out by being constantly biased by the spring 5.

0010 The coolant supply hole drilled in the center of the eject rod 3 supplies coolant. It communicates with a coolant supply hole 8 provided in the center of the pin 4.

[0011] As shown in Fig. 2, a tool 2 with a coolant supply hole 9 drilled in the center is mounted on the main spindle 1. When the tool is installed, the end surface of the coolant supply section 6 at the rear of the tool is aligned with the end surface of the coolant supply pin 4. makes contact with and is pushed in. In this case, the coolant supply pin 4 is connected to the eject rod. 3 inward against the force of spring 5, and is pressed against the coolant supply section 6 at the rear of the tool.

0012 Furthermore, by attaching an O-ring 7 to the pressing surface of the coolant supply pin 4, The coolant is connected to the coolant supply pin 4 without flowing out other than the coolant supply path. The coolant is supplied to the machining section through the coolant supply hole 8 on the side and the coolant supply hole 9 on the tool side. Ru.

[0013]

[Effect of the idea]

As described above, according to the machine tool shaft core supply coolant device of the present invention, the tool When installed, the tip of the coolant supply path in the main shaft (coolant supply pin in the example) Dispense the coolant while keeping it pressed against the coolant supply part at the rear of the tool at all times. This prevents coolant from flowing outside the coolant supply path. Coolant and fine particles mixed in the coolant are removed from the tool and spindle taper during replacement. Improved tool mounting accuracy when changing tools by preventing chips from adhering to them. By being able to measure this, it is possible to improve machining accuracy.

[0014] It also prevents damage caused by fine chips mixed in the coolant of the tool and spindle taper. It can be prevented.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a coolant supply section in an embodiment of the present invention with no tools installed;

FIG. 2 is a sectional view of the device with a tool attached.

FIG. 3 is a sectional view of a conventional coolant supply section with a tool attached thereto.

[Explanation of symbols]

1 Main shaft 2 Tools 3 Eject rod 4 Coolant supply pin 5 Spring 6 Coolant supply section at the rear of the tool 7 O-ring 8 Coolant supply hole (main shaft side) 9 Coolant supply hole (tool side) 10 Coolant leaked outside the coolant supply path

Claims (1)

[Scope of utility model registration request] 1. A machine tool having a coolant supply passage in the spindle that communicates with a coolant supply hole provided at the center of a tool mounted on the spindle, wherein the tip of the coolant supply passage in the spindle and the rear end of the tool. 1. A shaft core supply coolant device for a machine tool, characterized in that the coolant supply path is configured to be able to come into contact with and separate from the coolant supply path, and the tip of the coolant supply path is biased toward the tool.