JPS5826728Y2 - Split type vertical blade tool holder - Google Patents

Description

[Detailed description of the invention] The present invention consists of a tool holder to which a cubic tool for cutting a workpiece is attached, and a tool block that is separate from the tool holder and supports the tool holder. This concerns the holder.

Conventionally, a cubic tool is used for turning crankshaft journals and pins, and the cubic tool holder in this case requires preset replacement of the cubic tool itself, so this replacement work is done on the machine. It's a lot of work, and the operability is very poor, and if you use a cubic tool,
There is not enough space in the area where the cubic tool is attached to the tool holder to ensure sufficient shank strength, and the tool holder is often damaged. Therefore, it is necessary to frequently replace or repair the tool holder, which takes a lot of time and money. was spending.

That is, Fig. 1 shows an example of a conventional device of this type in a side view as seen from the operator's side.According to the conventional method, in order to replace the cubic tool a, it is difficult to It is necessary to loosen the cubic tool tightening nut b located at and replace it.

In other words, this cubic tool replacement work must be carried out in a very narrow space due to the shape of the breaking force Nikkotsu C.

Furthermore, when the tool holder d is damaged, the tool holder mounting bolt e is removed and replaced, but a lot of time is wasted in replacing it and determining the dimensions, and the cost of the replacement part is also high.

In this invention, by using a split type, the cubic tool itself can be replaced outside the machine, which improves the mounting accuracy of the cubic tool and also makes the replacement work easier.
In addition, the present invention provides a cutting tool holder that can maintain cutting strength and cutting accuracy equivalent to those of an integrated cubic tool holder.

The split type cubic tool holder of the present invention includes a tool holder to which a cubic tool for cutting a workpiece is attached, and a tool block that is separate from the tool holder and supports the tool holder, an inclined undercut portion in which the tool holder engages with the tool block provided on the tool holder;
For positioning, a part of the tool holder is inserted into a groove provided in the tool block, and the remaining part is inserted into a tool holder groove that has a substantially trapezoidal cross-sectional shape due to a convex step facing the tool block surface. a slope key; a tool holder presser foot having a convex portion that contacts the tool holder end surface and the tool block end surface for pressing the tool holder against the tool block surface; and a tool holder presser foot that is attached to the tool holder end surface and the tool block end surface. With the tool holder mounting bolt that straddles and presses onto the tool block,
It is characterized in that it is fixed to the tool block.

Hereinafter, one embodiment of the split cubic tool holder of the present invention will be described with reference to FIGS. 2 to 4.

In Figures 2 to 4, 1 is a workpiece, 2 is a cubic tool for turning this workpiece 1, 3 is a tool holder to which this cubic tool 2 is attached, and 4 is a separate part from this tool holder 3. 5A is a bolt for fixing the cubic cutting tool 2 to the tool holder 3, and 5B is a tightening nut.

The cubic tool fixing bolt 5A penetrates through the cubic tool 2, and its threaded end is screwed into the screw hole 33 of the tool holder 3, and the base end protruding from the top surface of the cubic tool 2 is used for tightening. By tightening the nut 5B, the cubic cutting tool 2 is firmly fixed to the tool holder 3.

The contact surfaces of the tool holder 3 and the tool block 4 have a stepped shape with a step 31 and a base 32 and a base 41 and a step 42 at mutually corresponding positions, respectively. The side surface in contact with 42 is an inclined surface that widens toward the protrusion direction.

The tool holder 3 and the tool block 4 have stepped portions 31 and 4.
2 and are assembled by mutually engaging them.

6 is a positioning gradient key, a part of which is inserted into a groove 7 (see FIG. 4) provided in the base 41 of the tool block 4, and a convex step facing the surface of the tool block 4. 8, and a remaining portion that fits into a tool holder groove 9 (see FIG. 4) having a substantially trapezoidal cross-sectional shape.

10 is a tool holder presser foot for pressing the tool holder 3 against the surface of the tool block 4;
It has protrusions 11 and 12 that come into contact with the end face of the tool block 4 and the end face of the tool block 4.

Reference numeral 13 denotes a tool holder mounting bolt for crimping the presser foot 10 to the tool block 4 by spanning the end face of the tool holder 3 and the end face of the tool block 4.

According to the split type cubic tool holder configured as shown in FIGS. 2 to 4, replacing the cubic tool 2 requires loosening the tool holder mounting bolt 13, which is easy to operate, and tightening the tool holder presser 10. Slide tool holder 3
Remove the entire tool block from tool block 4.

Since the cubic cutting tool 2 can be replaced on a setting gauge provided outside the machine, accuracy can be easily checked.

Furthermore, even if the tool holder 3 is damaged, it can be easily and reliably replaced by the same method as the cubic tool 2 described above.

In the split type cubic tool holder of the present invention, the tool holder 3 and the tool block 4 are provided with engagement steps 31 and 42, respectively, for engagement, and the tool holder presser foot 10 and the tool holder mounting bolt 13 are provided with engagement steps 31 and 42, respectively. Since the tool holder 3 and the tool block 4 are crimped together, the movement of the tool holder 3 in the front-rear direction (left-right direction in FIGS. 2 and 3) is reliably regulated.

In addition, since the engaging step portions 31 and 42 have the abutting side surfaces of each step inclined, the retaining portion of both members becomes Z-shaped, and when the tool holder 3 is assembled to the tool block 4. , the vertical movement of the tool holder 3 is reliably regulated.

Further, since a slope key 6 is provided on the contact surface between the tool holder 3 and the tool block 4, the movement of the tool block 4 in the lateral direction (left and right direction in FIG. 4) is reliably regulated. .

Therefore, in the split-type tool holder of the present invention,
When the tool holder 3 is assembled to the tool block 4, movement in all directions is firmly regulated, and a decrease in strength of the tool holder due to the split type is prevented.

In addition, the split type cubic tool holder of the present invention has a slope key 6.
By using the tool holder 3, it becomes easy to position the groove 9 of the tool holder 3 when inserting it into the slope key 6, which improves the work of assembling the tool holder 3 to the tool block 4 and shortens the replacement time. It will be done.

In addition, when replacing the tool holder 3, for example, when removing it from the tool block 4, use the mounting bolt 1, which is easy to operate.
3, slide the presser foot 10, and attach the tool holder 3.
It is only necessary to remove it from the tool block 4, and when assembling it to the tool block 4,
The tool block 4 and the tool holder 3 are positioned by engaging the inclined step part 31 of the tool holder 3 and fitting the slope key 6 inserted into the groove part 7 of the tool block 4 into the groove part 9 of the tool holder 3. After that, all you need to do is press and secure both parts with the presser foot 10 and the mounting bolt 13.
Easy to operate and short replacement time.

Of course, the exchange of cubic tool 2 is also possible with Pol 1-5A and Natsuto 5.
This is very easy as all you need to do is operate B.

The split type cubic tool holder of the present invention has the following advantages by being configured as described above.

■ The tool holder is split and the tool holder with the cubic tool attached can be detachably attached to the tool block, making it possible to replace the cubic tool outside the machine.
The installation accuracy of the cubic tool is improved, and replacement time is also shortened.

Furthermore, even if the tool holder is damaged, it can be easily replaced.

■ By fixing the cubic tool to the tool holder with a bolt and nut that penetrate the cubic tool, the strength of the attachment of the cubic tool to the tool holder is improved, making powerful cutting possible.

Furthermore, there is no problem such as blade wobbling of the cutting tool, and the cutting strength is improved.

■ The mounting structure of the tool holder to the tool block is designed to be easily replaced and securely fixed, so it maintains almost the same strength as the integrated cubic tool holder and is easy to replace. It is.

■ As described in ■, the cubic tool and tool holder are strongly integrated, and the tool holder and tool block are tightly joined together, so
The cutting accuracy of the cubic tool is almost the same as that of a cubic tool with an integrated tool holder, and it is possible to maintain cutting force and machining accuracy, which was previously reduced by using the split type.

As is clear from the above description, the split type cubic tool holder of the present invention not only shortens the cubic tool replacement work due to the split type and improves the machine operating rate due to this, but also has improved strength due to the split type. This has various advantages in that it prevents a decrease in the temperature and allows the material to be cut to be cut well.

According to the present invention, the tool holder can be unified into two types, one for finishing and one for rough cutting.
As for the spare tool holder, not only can it be used with a minimum of hands, but also the perfect circle and reverse tool holders can have the same shape, so it is sufficient to change the tooling layout. can correspond to

Moreover, by presetting the tool holder, it can play a major role in improving the machine operating rate and reducing the maintenance and management costs of the tool holder.

[Brief explanation of the drawing]

Fig. 1 is a side view of a conventional device, Fig. 2 is a side view of an embodiment of the present invention, Fig. 3 is a side view showing an enlarged part of Fig. 2 in detail, and Fig. 4 is a side view of an embodiment of the present invention. FIG. 4 is a view seen from the direction of the arrow line A-A in FIG. 3; 1... Workpiece, 2... Cubic bite,
3... Tool holder, 4... Tool block, 5... Cubic tool tightening nut, 6...
...Positioning gradient key 7...Tool block groove, 8...Tool holder convex step, 9.
...Tool holder groove, 10...Tool holder presser foot, 11.12...Tool holder presser full convex portion, 13...Tool holder mounting bolt, 14...Dovetail groove.

Claims (1)

[Claims for Utility Model Registration] A tool holder equipped with a cubic cutting tool for cutting a workpiece, and a tool block that is separate from the tool holder and supports the tool holder, the tool comprising: a slanted undercut portion where the holder locks onto the tool block provided on the tool holder;
For positioning, a part of the tool block is inserted into a groove provided in the tool block, and the remaining part is inserted into a tool holder groove that has a substantially trapezoidal cross-sectional shape due to a convex step facing the tool block surface. a slope key; a tool holder presser foot having a convex portion that contacts the tool holder end surface and the tool block end surface for pressing the tool holder against the tool block surface; and a tool holder presser foot that is attached to the tool holder end surface and the tool block end surface. A split type cubic tool holder, characterized in that it is fixed to the tool block by a tool holder mounting bolt that is straddled and crimped to the tool block.