JPH0432167Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The invention consists of an intermediate metal that pivots a small-diameter long line boring bar, and a main shaft and an intermediate metal that can be detached from each other in order to transfer the intermediate metal to the ram side. The present invention relates to an intermediate metal structure that is transported by a single transport holder, which is provided with a transport holder that is attached to a transport holder.

[Prior Art] When machining cam bearing holes, etc. of engine cylinder heads etc. with a numerically controlled machine tool having an automatic tool changer, a small diameter long line boring bar is used. Various types of line boring bars are used depending on the size of the workpiece and the processing position, and it is necessary to arrange the line boring bar at a position suitable for the processing position. On the other hand, as mentioned above, the line boring bar is easily bent due to its small diameter and long length, and it is necessary to hold it with an intermediate metal during processing. The intermediate metal is set on a ram placed near the workpiece machining position, but a variety of types are required to accommodate changes in line boring bars. Therefore, it is necessary to store many kinds of intermediate metals in a magazine, and to transport them to the ram position by a transport holder and set them on the ram when necessary.

Figure 5 shows the intermediate metal 1 set on the ram 13.
This shows the engaged state of the line boring bar 14 and the line boring bar 14 which is pivotally supported thereto.

The ram 13 is placed near the workpiece 15. The intermediate metal 1 is transferred to the ram 13 from a magazine for intermediate metals (not shown) by a transport holder 2. To explain in detail, the intermediate metal 1 in the magazine is held by a transport holder 2 (stored in the magazine of an automatic tool changer). Transport holder 2
The tapered shank portion 10 is installed in the tapered hole of the main shaft 16. The main shaft 16 is moved and the intermediate metal 1 is attached to the ram 13 at the [ ] position in the figure. After installation,
The transport holder 2 is removed from the intermediate metal 1, and the transport holder 2 is moved to the magazine side in order to transport the next intermediate metal 1 in the intermediate metal magazine. During this time, the intermediate metal 1, which was in the [] position, is moved to the [] position by the moving and holding mechanism 17,
It is positioned and fixed by a fixing means (not shown). Second
The intermediate metal 1 is mounted at the [] position in the same manner as described above, and is positioned and fixed in the same manner as the first intermediate metal 1. On the other hand, a line boring bar 14 necessary for machining is inserted into the main shaft 16 and conveyed to the ram 13 side, and as shown in the figure, a rod portion for supporting the cutter is inserted into the intermediate metal 1 and pivotally supported.

[Problem to be solved by the invention] As will be explained in detail later, in order to hold the intermediate metal 1 with the transport holder 2, the locking portion 3 and the locking rod 4 formed on the transport holder 2 must be adjusted accordingly. This is done by locking the intermediate metal 1 at the locking point, but as mentioned above, the intermediate metal 1 is connected to the line boring bar 1.
Various types of equipment are required depending on the shape and location of item 4. Therefore, in principle, the transport holder 2 also needs to be compatible with this. If the transport holder 2 is made of many different types, it will not only be expensive, but also the automatic replacement of the intermediate metal 1 will be complicated, resulting in a problem that smooth and quick automatic replacement cannot be performed.

An object of the present invention is to provide an intermediate metal structure that allows automatic exchange of various types of intermediate metals smoothly and quickly, and that can be carried out at low cost and transported by a single transport holder.

[Means for Solving the Problems] To this end, the present invention provides an intermediate metal which is removably inserted into a ram placed at a workpiece machining position and has a bearing hole for pivotally supporting a line boring bar. , a conveyance holder that removably engages with the intermediate metal and is removably mounted within the main shaft, and the intermediate metal is slidably abutted and engaged with the sliding surface of the ram. A sliding surface, a boss portion formed through a bearing hole in which a line boring bar is pivotally supported, and a T-groove and a locking groove formed along the direction of the sliding surface. The holder includes a tapered shank portion that is removably attached to the tapered hole of the main shaft, and a locking portion and a locking rod that engage with the T-groove and the locking groove along the axial direction of the tapered shank portion. A locking mechanism is interposed between the intermediate metal and the transport holder to restrict free movement in the attachment/detachment direction between the two, and
an intermediate metal structure in which the distance between the locking groove and the T-groove of the intermediate metal and the distance between the locking portion of the transport holder and the locking rod are always the same; This constitutes an intermediate metal structure that is transported by a single transport holder that is formed so as to be separable from the intermediate metal block in which sliding surfaces, T-grooves, etc. are formed.

[Function] Even if the intermediate metal changes in response to the line boring bar, the locking point between the intermediate metal and the transport holder remains unchanged, so the transport holder with a fixed shape can handle many types of intermediate metal. can be held and transported. Moreover, the intermediate metal can be safely held by the locking mechanism of the transport holder.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

As shown in FIGS. 1 to 4, the intermediate metal 1
is a sliding surface 5 (V
a T-groove 6 (inverted T-groove shape) recessed in the middle of the sliding surface 5, and a bearing hole 7 with a diameter D located at a distance of a dimension L from the T-groove 6. , a boss portion 8 surrounding the bearing hole 7, and arcuate engagement grooves 9 formed at both ends of the boss portion 8. In addition, the dimension L
is shown from the upper surface of the intermediate metal 1 in the illustration, but since the sliding surface 5 and the T-groove 6 are formed using the upper surface as a reference surface, the bearing hole 7 and the T-groove 6 are formed in association with each other. Ru. Further, the boss portion 8 in which the bearing hole 7 is formed is separated from the block 18 in which the sliding surface 5 and the T-groove 6 are formed.
Further, in this embodiment, the engagement groove 9 is formed in the boss portion 8, and the locking groove 9 is formed at a position a certain distance from the T-slot 6.

The conveyance holder 2 includes a taper shank portion 10 that is inserted into the main shaft 16, a gripping portion 11 used when automatically exchanging the shank portion, a holding block 12 formed on the front surface of the gripping portion 11, and a holding block 12.
A locking part 3 fixed to the upper part of the and extending in the axial direction.
, a pair of locking rods 4, etc., which similarly extend along the axial direction from the holding block 12.
The locking portion 3 has a shape that is slidably engaged with the T-groove 6 of the intermediate metal 1, and the locking rod 4 just fits into the locking groove 9 on its outer periphery, as shown by the two-dot chain line in FIG. It is formed in a position and shape that partially abuts. That is, the locking portion 3 and the locking rod 4 are formed to have the same spacing as the interval between the T-slot 6 and the locking groove 9 in the intermediate metal 1.

Next, the intermediate metal 1 and the transport holder 2 will be explained in more detail.

As shown in FIGS. 1 and 2, the intermediate metal 1 is a block 1 forming a sliding surface 5 and a T-groove 6.
8 and a bearing member 19 from which the boss portion 8 is formed in a protruding manner are integrally connected by bolts 20. As described above, the boss portion 8 has locking grooves 9 formed at both ends thereof, and a bearing hole 7 having a diameter D. Further, as clearly shown in FIG. 1, the boss portions 8 are formed of two pieces facing each other at appropriate intervals in the axial direction, but of course, the shape is not limited to this. do not have. Further, oil holes 21 and 22 communicate between the sliding surface 5 and the bearing hole 7, and function to lubricate these.

As shown in FIG. 1, the locking part 3 of the transport holder 2 is formed of a shape that fits into the T-slot 6, as described above, and the bolt 3 is attached to the holding block 12.
0 (FIG. 4). Holding block 1
2 is fixed to the grip part 11 with a bolt 39 and in a fixed position with a positioning pin 40. Further, a pull stud 41 provided at the end of the tapered shank portion 10 is for clamping the conveying holder 2 within the main shaft 16.

Next, the lock mechanism 31 will be explained. A through hole 23 is provided at the center of the T-groove 6 recessed in the center of the block 18, and the lower end of the through hole 23 in the drawing is closed by a support plate 24. A ball 25 is inserted into the through hole 23, and a spring 26 is interposed between the ball 25 and the support plate 24 to press the ball 25 toward the T-groove 6 side. Note that the ball 25 is connected to the through hole 2.
A bent portion 27 is formed so as to prevent it from rolling out from 3. Furthermore, a wedge-shaped groove 29 is provided near the through hole 23 on the bottom surface of the T-slot 6 for locking the ball 28 on the conveyance holder 2 side. The locking portion 3 is formed with a through hole 32 into which the ball 28 is inserted, an inverted V-shaped groove 33 into which the ball 25 engages, and a sliding hole 34 which slidably supports the rod 35. Note that one end of the sliding hole 34 is closed by a plug 36. A spring 37 is interposed between the rod 35 and the plug 36 to press the rod 35 in the popping direction. Note that when the rod 35 is in a free state, the spring 37 pushes the rod 35 in the direction opposite to the arrow A in FIG.
It acts so as to press the groove 29 toward the groove 29 side. Conversely, when the rod 35 is pushed in the direction of arrow A, the spring 37
is compressed, the tapered portion 38 separates from the ball 28, and the ball 28 becomes free.

Next, the function of holding the intermediate metal 1 with the transport holder 2 will be explained.

Connect the locking part 3 of the transport holder 2 to the T of the intermediate metal 1.
At the same time as the locking rod 4 is inserted into the groove 6, the locking rod 4 comes into contact with the locking groove 9 and holds the boss portion 8 in a sandwiching manner (as shown by the two-dot chain line in FIG. 2). T groove 6 is intermediate metal 1
Since the locking groove 9 is formed below the T-slot 6 at a symmetrical position, the intermediate metal 1 is stably held in the transport holder 2. On the other hand, the locking mechanism 31 reliably locks the locking portion 3 into the T-slot 6. That is, the spring 26
The ball 25 is pressed against the groove 33, and the ball 2
8 is the tapered part 38 of the rod 35 and the spring 37
It is pressed downward by the spring force of , and is pressed into contact with the groove 29 . Therefore, the intermediate metal 9 and the transport holder 2 are reliably locked. As described above, the tapered shank portion 10 of the conveyance holder 2 with the intermediate metal 1 inserted therein is inserted into the main shaft 16, and the main shaft 16 etc. are moved to a predetermined position by the control device of the machine, so that they are placed near the ram 13. It can be transported and installed automatically. During installation, the rod 31 is pushed in the direction of arrow A by a structure around the main shaft 16 (not shown), and the pressure contact of the ball 28 with the groove 29 is released. By fixing the intermediate metal 1 to the ram 13 side (this fixing means is not shown), only the transport holder 2 can be pulled out from the intermediate metal 1. Next, the transport holder 2 is transferred to the intermediate metal magazine side, and a desired next intermediate metal 1 is held therein. As mentioned above, the boss portion 8
Since it is formed to be removably attached to the block 18, it is possible to attach another type of boss portion to the block 18. The boss portion of another type can have a diameter D depending on the type of line boring bar, and can be formed to arbitrarily change the distance L from the sliding surface 5 or the T-groove 6. However, since the distance between the T-groove 6 and the locking groove 4 of the intermediate metal and the distance between the locking part 3 of the transport holder 2 and the locking rod 4 are always the same, a different type of intermediate metal may be used. Even if this is adopted, a common transport holder 2 can be used. That is, by taking out and inserting the desired intermediate metal 1 etc. stored in the intermediate metal magazine using the transport holder 2 as necessary, the desired intermediate metal is transferred to the ram 13 side and installed. This is done easily. Thereby, the working time can be shortened. Moreover, it can be carried out at a lower cost than when using many types of transport holders corresponding to intermediate metals. In this embodiment, the T-slot 6 and the locking part 3
The shape is as shown in the figure, and the locking groove 9 and the locking rod 4 are also formed into a 1/4 arc-shaped surface and a round bar, but it is needless to say that they are not limited to these shapes.

[Effects of the Invention] As is clear from the above explanation, according to the present invention, the intermediate metal can be transferred smoothly and quickly, and can be carried out at low cost.

[Brief explanation of the drawing]

Fig. 1 is an axial sectional view showing the state of engagement between the intermediate metal and the transport holder according to an embodiment of the present invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, and Fig. 3 is an axial sectional view showing the intermediate metal of the embodiment. FIG. 4 is a schematic perspective view of the conveying holder of the embodiment, and FIG. 5 is a partial side view showing the state of engagement between the intermediate metal and the ram of the embodiment. 1...Intermediate metal, 2...Transportation holder, 3...
... Locking part, 4 ... Locking rod, 5 ... Sliding surface, 6 ...
T groove, 7... Bearing hole, 8... Boss part, 9... Locking groove, 10... Taper shank part, 11... Gripping part, 12... Holding block, 14... Line boring bar, 15... Workpiece, 16...Spindle, 1
7...Movement holding mechanism, 18...Block, 19...
... Bearing member, 20, 30, 39 ... Bolt, 2
1, 22... Oil hole, 23, 32... Through hole, 24
... Support plate, 25, 28 ... Ball, 26, 37
...Spring, 27...Bending portion, 29, 33...
...Groove, 31...Lock mechanism, 34...Sliding hole, 3
5... Rod, 36... Plug, 38... Taper portion, 40... Locating pin, 41... Pull stud.

Claims (1)

[Claims for Utility Model Registration] 1. An intermediate metal that is removably inserted into a ram placed at a processing position of a workpiece and has a bearing hole that pivotally supports a line boring bar;
a conveyance holder that removably engages with the intermediate metal and is removably mounted within the main shaft; It consists of a sliding surface, a boss portion formed through the bearing hole in which the line boring bar is pivotally supported, and a T groove and a locking groove formed along the direction of the sliding surface,
The conveyance holder includes a tapered shank portion that is removably attached to the tapered hole of the main shaft, and a locking portion and a locking rod that engage with the T-groove and the locking groove along the axial direction of the tapered shank portion. A locking mechanism is interposed between the intermediate metal and the transport holder to restrain free movement in the attachment/detachment direction between the two, and a locking groove in the intermediate metal is provided. and T
An intermediate metal structure transported by a single transport holder, characterized in that the distance between the groove and the distance between the locking portion of the transport holder and the locking rod is always the same. 2 The boss portion of the intermediate metal is connected to the sliding surface and the T.
An intermediate metal structure transported by a single transport holder according to claim 1, which is formed so as to be separable from the intermediate metal block in which grooves and the like are formed.