JPH0239715Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a chip scattering prevention device for a tool holder in a machining center.

The machining center is as shown in Fig. 1. 1 is the machine body frame, 2 is the work table in front of it, and 3 is a left main shaft that can move a certain distance up and down, left and right, front and back by a mechanism (not shown) from inside the machine body frame. The spindle 4 is an ATC device (automatic tool changer) installed above the spindle, and a mechanism (not shown) inside the frame body 1 controls the tool drum 4a.
is adapted to rotate clockwise or counterclockwise. 4b is a tool, 4c is a tool holder, 4d
4e is a protective cover, and 4e is a tool passage.

In the above device, a tool 4b held by an upper tool holder 4c is attached to the main spindle 3.
However, during the work, chips from below fly into the ATC device and stick to it, making it difficult to perform the next replacement work smoothly and reducing work performance. There are problems such as deterioration and maintenance management becomes troublesome.

The present invention is an attempt to solve this problem, and its feature is that shutter opening/closing devices are arranged at symmetrical positions across the tool path of the tool holder, and each shutter opening/closing device has a shutter opening/closing device. Consists of a slide shaft, a slider, a spring, etc. for guiding the tool in a direction perpendicular to the tool passage, and the traction action of the spring keeps the tool passage closed at all times, as well as lifting and lowering the main spindle. A lever is provided and connected to the shutter, and when the main spindle is raised for tool exchange, the lever swings the shutter against a spring to open the tool passage. On the other hand, when descending, the shutter is pulled back to its original closed state by the traction action of the spring.

An example of implementing the present invention will be described below based on the drawings.

Fig. 2 is an overall perspective view of the improved device, Fig. 2 is a partially sectional front view of the main parts showing the shutter in a closed state, and Fig. 4 is the same as Fig. 3.
Figures 5A and 5B are side views taken along line 1 and 5A and 5B, which are explanatory diagrams showing the operation of the shutter in an open state.

Reference numerals 5 and 5' denote shutter opening/closing devices, which communicate with the vertical movement of the main shaft spindle 3 from symmetrical positions at the lower part of the tool passage 4e, and automatically move the shutter forward and backward from the left and right positions for opening/closing operations. (5)
The configuration of is explained below. Reference numerals 7a and 7b indicate shaft bearing brackets which are arranged in parallel at a constant interval on the protruding lower surface of the ATC device body F, and each of which supports the horizontal shaft 8.
It supports a and 8b. Reference numerals 9a and 9b are sliders that slide using the horizontal shaft as a guide, and a shutter 10, which is a plate of a certain length, is horizontally attached to the lower part of the slider via the slider.

Reference numeral 11 denotes a spring interposed between the horizontal shafts 8a and 8b, and one end of which is a pin 12 fixed to the body side.
The other end is locked to a pin 13 fixed on the shutter at a certain distance on the opposite side, and the pulling action of the spring 11 normally moves the shutter 10 toward the tool passage 4e. It looks like it's being pulled towards you.

Reference numeral 14 denotes an arm rod, one end of which is fixed to the apparatus body frame 1 side using bolts and screws 15, while the other end is provided in a hanging state at approximately the middle position below the shutter 10, and is attached to the lever 16. In this case, reference numeral 17 is a pivot pin that serves as a rotation fulcrum, and is provided with an annular ring 18 in such a way that an appropriate interval is maintained. (See Figure 4) Reference numeral 19 connects the other end of the lever 16 and the shutter 10.
Now 1 is provided to connect with the bottom surface.
One end of the lever 19 is connected to a bearing 20 on the lower surface of the shutter 10 using a pin 21a, while the other end is connected to the lever 16 with a pin 21b.
When the shutter 10 is pulled by the spring 11, these levers 16 and 19 are bent into a dogleg shape.

Reference numeral 22 denotes a guide roller which is provided to protrude toward the tool passage 4e at approximately the middle position of the lever 16, and comes into contact with the outer surface of the spindle means during the vertical movement of the spindle 3, which will be described below. 23 is a guide roller support shaft.

Although the above is the configuration of one shutter 10,
The shutters 10' have a similar structure and are arranged symmetrically, and the tool passage 4e sides of the shutters 10 and 10' are overlapped with each other with a constant width.

In addition, 24a and 24b are dogs provided below the main spindle 3 so as to sandwich the spindle and project slightly outward from the left and right, and 25 is a dog bracket thereof.

The present invention has the above-mentioned configuration, and its operation will be explained next.

In Fig. 3A, the main spindle 3 is located below the ATC device, and the shutters 10 and 10' always block the tool passage 4e, so that during machining work, there is no cutting from the cutter attached to the main spindle 3. This prevents powder from flying into the tool drum.

FIGS. 5A and 5B show the state in which the main spindle 3 is raised toward the tool drum side for tool exchange. When the main spindle 3 is raised a certain distance as shown in FIG. In contact with the guide rollers 22, 22', the lever 16,
16' is the pivot pin 1 of each arm rod 14, 14'.
The shutters 10 and 10' are rotated in the directions of arrows A and B using the levers 19 and 17' as fulcrums.
The tool is moved in the directions of arrows C and D against direction 1', thereby opening the tool passage 4e which had been blocked at the tip of each shutter 10, 10'. Therefore, the passage of the main spindle 3 can be carried out without any problem.

FIG. B shows a state in which the tool is replaced when the main spindle 3 reaches its upper limit.

When the tool exchange is completed, the main spindle 3 descends, but during the descent, the dog 2
4a, 24b descend while contacting guide rollers 22, 22', and at this time springs 11, 1
1' causes the shutters 10, 10' to be pulled back to their original states, and the passageway after the main shaft spindle 3 has passed is closed.

As described above, the present invention automatically opens and closes the tool passage 4e in conjunction with the lifting and lowering movement of the main spindle when exchanging tools, so that chips and chips during machining work are exchanged. It will not stick to waiting tools at all, eliminates the cause of troubles during tool replacement work, makes maintenance management easier, and greatly contributes to improving work performance.

[Brief explanation of drawings]

Fig. 1 is an overall perspective view of the machining center device, Fig. 2 is an overall perspective view of the improved same device, Fig. 3 is a partially sectional front view of the main parts, and Fig. 4 is a side view taken along the line -' in Fig. 3. 5A and 5B are operation explanatory diagrams showing a state in which the shutter is opened. 1...Equipment body frame, 2...Work table, 3...Main spindle, 4...ATC device,
4a...Tool drum, 4b...ATC device, 4c
...Tool holder, 4d...Protective cover, 4e
...Tool passage, 5, 5'...Shutter opening/closing device, 6,6'...Shutter, 7a, 7b...
Bearing bracket, 8a, 8b...Horizontal shaft, 9a,
9b...Slider, 10...Shutter, 11
...Spring, 14...Arm rod, 16...
...Lever, 19...Lever, 22...Guide roller, 24a, 24b...Dog.

Claims (1)

[Scope of utility model registration request] Shutter opening/closing devices are arranged at symmetrical positions across the tool path of the tool holder, and each shutter opening/closing device is composed of a slide shaft, a slider, a spring, etc. for guiding the shutter in a direction perpendicular to the tool path. In addition, the tool path is always closed by the traction action of the spring, and a lever is provided that swings with the lifting and lowering movement of the main spindle and is connected to the shutter, while the main spindle is used for tool exchange. When the lever moves upward, the lever swings against the spring to open the tool passage, and when it moves downward, the lever is pulled back to its original closed state by the traction action of the spring. A chip scattering prevention device for a tool holder of a machining center.