JPS5828045B2 - milling machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a milling machine, and its purpose is to enable the so-called multi-blade cutter head attached to the unit body to be replaced in a short time (quick change), and to improve work efficiency. That's what happened.

A conventional multi-blade cutter head in a general zero-meet link machine has a structure shown in FIGS. 1 and 2.

That is, a plurality of support brackets 8 are slidably attached to dovetail grooves 7 provided in the unit main body 1, bolts 9 are tightened and positioned at required intervals, and a number of milling cutters 6 are mounted on the support brackets 8 with a disc. The arm μ3, which has been positioned at predetermined intervals by a spring collar, is held down by a cap 10, and is supported rotatably by being tightened with a bolt 11. The spindle 2 and the end of the arm μ3 are connected with a key 4 to prevent rotation, and are tightened with a bolt 5. was.

In milling, the multi-blade cutter head Φ is replaced based on changes in the workpiece.

In this case, in the above conventional structure, the arm μ3 is placed in a suspended state using a crane in advance, the cap 10 of the support bracket 8 is removed, the arm μ3 and the spindle 2 are separated by removing the bolt 5, and the arm μ3 is separated from the other arm μ3. They were exchanging.

Therefore, the cap 10 is attached and removed, the arm μ3 and the spindle 2
This requires a lot of work such as attaching and detaching the support bracket 8 and adjusting the spacing position of the support bracket 8, and the replacement time is quite long, which has a negative effect on work efficiency.

The present invention has solved the above-mentioned conventional problems, and its features are that the arm μ can be attached and detached from the unit body while assembled on the support, the arm μ and the spindle can be attached and detached with one touch, and the arm μ can be attached and detached with a single touch. The purpose is to quickly change the cutter head.

Embodiments of the present invention will be described below with reference to FIGS. 3 to 5.

1 is a unit body, and 2 is a spindle.

Main bodies 12a and 12b have dovetail grooves in the direction intersecting the dovetail grooves 7 in the dovetail grooves 1 provided in the unit body 1.
Attach and secure with tightening bolts 13.

On the other hand, a plurality of arm supports 15 are integrally provided at predetermined intervals on a member 14 having a dovetail groove that can be attached to and detached from the main bodies 12a and 12b, and a large number of cutters 6 are positioned on this at predetermined intervals by disk collars. The arm μ3 is rotatably supported by a cap 16 and a bolt 17.

That is, it is assumed that the arm 3 having a large number of cutters 6 is assembled to the member 14 having a dovetail groove via the arm support 15.

Reference numeral 18 designates an eye bolt for hanging a crane or the like protruding from the dovetail 14, 19 a razor for engaging the dovetail 14 with the main bodies 12a and 12b, 20 a stopper bolt, and 13a an intermediate holding plate.

Furthermore, in addition to the above configuration, the present invention improves the attachment/detachment structure between the arc 3 and the spindle 2 as follows.

That is, as shown in FIG. 5 for details of the portion shown by the arrow in FIG.
It is fixed through.

This flange 22 has a recess 23 recessed in the axial direction of the spindle 2 on the same center line as the arm μ 3 attached to the unit body 1, and a pin hole 26 perpendicular to the spindle axis. A spring pin 25 is provided at the end of the hole 26.

On the other hand, the end of the arm μ3 can be fitted into and removed from the recess 23 of the flange 22, and the fitting portion of the arm μ3 is provided with a groove 21 that matches the pin hole 26 when the arm μ3 is fitted into the recess 23.
A locating pin 24 is inserted through a pin hole 26 and a groove 21 to removably connect the spindle 2 and the arm μ3.

Since the present invention has the above-described structure, the arm μ3 coupled to the spindle 2 is transmitted with rotational force by the axis of the fitting part fitted into the recess 23 of the flange 22, and the locating pin The workpiece is cut by the cutter 6 which receives an axial force due to the width of the groove 21 in which the cutter 24 engages.

When replacing the cutter with a different combination due to changes in the workpiece, etc., first hang a wire around the eye bolt 18 so that it can be hung by a crane, etc., and then pull out the locating pin 24 to connect the arm μ3 and spindle 2. is in a separated state.

After that, by removing the razor 19 and the presser plate 13a, the member 14 having the dovetail groove is removed from the main bodies 12a and 12b.
It can be removed by sliding against it.

Therefore, the member 14 having the dovetail groove is attached to the main bodies 12a and 12.
By sliding outward along direction b, the member 14 having the dovetail groove is removed from the unit body 1, and at the same time the member 14 having the dovetail groove is removed from the unit body 1.
3 is removed from the recess 23 of the flange 22 and suspended by a crane or the like and placed on the floor or the like.

Then, the member 14 having a separate dovetail groove, which has been prepared by assembling the cutter 6 in advance, is attached to the unit main body 1 in the reverse order of removal, and the arm μ 3 and the spindle 2 are attached to the locating pin 24. The exchange is completed by connecting them by inserting them.

Note that the locating pin 24 inserted into the pin hole 26 of the flange 22 engages with the spring pin 25, so it does not come out naturally.

As described above, according to the present invention, an arm μ that pivotally supports a large number of cutters is integrally fixed to a member having a dovetail groove.
The multi-blade cutter head is supported on a support and can be attached and removed via a dovetail member in the unit body, so when replacing the multi-blade cutter head, simply remove the razor and the holding plate. This makes it possible to replace the support bracket at will, thereby eliminating the need for the troublesome work of attaching and detaching the caps of each support bracket as in the conventional case shown in FIGS. 1 and 2.

In addition, attaching and detaching the arm and the spindle can be completed with one touch by inserting and removing the locating pin.
Due to the structure for attaching and detaching the multi-blade cutter head, the unit body, the arm and the spindle, the time required to replace the multi-blade cutter head can be significantly shortened, which has the advantage of improving work efficiency.

[Brief explanation of drawings]

Fig. 1 is a front view of a conventional multi-blade cutter head, Fig. 2 is a side view of the same, Fig. 3 is a front view of the present invention, Fig. 4 is a side view, and Fig. 5 is viewed from arrow V in Fig. 3. FIG. 1...Unit body, 2...Spindle, 3...Arμ, 6...Cutter,
12a, 12b...Main body, 14...Member having a dovetail groove, 15...Arμ support,
16...Cap, 19...Razor, 21...Concave groove, 22...Flange,
23... Recess, 24... Locating pin, 25... Spring pin, 26... Pin hole.

Claims (1)

[Scope of Claims] 1. A member having a dovetail groove that can be detachably attached to the unit main body is integrally provided with a plurality of ARμ supports at predetermined intervals, and the ARμ supports have a large number of milling cutters supported thereon, and the ARμ is rotated. A milling machine characterized in that the arm and the spindle are freely supported and detachably connected to each other. 2 A plurality of ARμ supports are integrally provided at predetermined intervals on a member having a dovetail groove that can be attached and detached from the unit body, and the ARμ supports rotatably support the ARμ supporting a large number of milling cutters, A flange is provided at the tip of the spindle, a concave portion is formed on the end surface of the flange and is concentric with the spindle and extends in the axial direction of the spindle, and a pin hole is drilled in the flange in a diametrical direction perpendicular to the axis of the spindle, The shaft end of the arm μ is provided with a fitting portion that fits into and removes from the recess, and a groove perpendicular to the axial direction in the fitting portion, the fitting portion is fitted into the recess, and a pin hole and a groove are formed. A milling machine characterized by being equipped with an attachment/detachment device for connecting an arm and a spindle into which a locating pin can be freely inserted and removed.