JPS6110882Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fluid circuit of a cutting table suitable for use in a lathe.

Conventionally, a cutting table generally includes an auxiliary cutting table that provides vertical feed, and a main cutting table that is installed on the auxiliary cutting table and provides horizontal feed, and the auxiliary cutting table is rotatable above the bed. Further, the main cutting table is rotatably supported on the auxiliary cutting table, and various cutting operations can be performed by appropriately setting the rotation angle positions thereof. It is also known that each cutting table is provided with a cylinder device as a drive source for relatively reciprocating the upper frame and the lower frame constituting each cutting table.

However, in the past, pressurized fluid was supplied to each cylinder device through a high-pressure hose connected to each cutting table, but it was particularly difficult to set the connection direction of the high-pressure hose to the main cutting table. It was hot.
In other words, since the auxiliary cutting table simply rotates at a predetermined angle relative to the bed on the fixed side, the high-pressure hose for this can be connected while taking into consideration the rotation range, but the main cutting table is connected to the auxiliary cutting table. Not only is the rotation combined with the rotation of the auxiliary cutting table and its own rotation, but it is also reciprocated in response to the operation of the upper frame of the auxiliary cutting table, making it difficult to find the optimal connection direction. Generally, a connecting pipe is provided between the main cutting table and the high pressure hose, and a straight connecting pipe or a curved connecting pipe must be selected depending on the position of the main cutting table, rotation conditions, etc.

The present invention was made in view of the above points, and includes a first lower frame rotatably supported on the bed, a first upper frame slidably provided on the lower frame,
an auxiliary cutting table having a first cylinder device that reciprocates the upper frame relative to the lower frame;
a second lower frame rotatably supported on the upper frame; a second upper frame slidably provided on the second lower frame;
In a cutting table comprising a main cutting table having a second cylinder device that reciprocates the second upper frame with respect to the second lower frame, the first upper frame and the second lower frame are connected to each other. A pair of arcuate grooves or circumferential grooves centered on the rotation center of both are formed on at least one of the contact surfaces, and a passage formed in the first upper frame that communicates with the grooves is connected to the first upper frame. an internal passage of a connecting plate attached to the upper frame; an internal passage of an operating rod slidably provided on at least one of the connecting plates and the first lower frame; A cutting table, characterized in that the passage formed in the frame communicates with the fluid pressure source, and the passage formed in the second lower frame that communicates with the groove communicates with the second cylinder device, This makes it possible to omit most of the high-pressure hoses connected to the

The invention will now be described with reference to the illustrated embodiments. In Fig. 1, A is a support stand fixed on a bed (not shown), B is a lower frame B1 rotatably supported on the support stand A, and an upper frame B2 is supported reciprocably on the lower frame B1. C is a main cutting table comprising a lower frame C1 rotatably supported on the upper frame B2 of the auxiliary cutting table B and an upper frame C2 reciprocatably supported on the lower frame C1, The upper frame B2 of the auxiliary cutting table B and the upper frame C2 of the main cutting table C are normally arranged so that they can reciprocate in directions perpendicular to each other. Further, a tool post (not shown) is attached to the upper frame C2 of the main cutting table C.

The lower frame B1 of the auxiliary cutting table B and the upper frame C1 of the main cutting table C are, as will be described later, each upper frame B1.
2, C2 are provided with cylinders that reciprocate, and pressure fluid can be supplied to each cylinder via a support base A. Therefore, the support base A has a pair of supply and discharge passages to each cylinder, that is, a total of four supply and discharge passages.

FIG. 2 is a plan view of the support stand A, and the upper surface thereof has four arcuate grooves 1 forming part of each supply/discharge passage.
0a, 10b, 11a, and 11b are formed.
A pair of arcuate grooves 10a, 10b are formed at equal intervals on the same circumference around the center hole 12, and span the same angular range, while the other pair of arcuate grooves 11a, 11b The arcuate grooves 10a, 10b are located at equal intervals on the same circumference outside the arcuate grooves 10a, 10b with the center hole 12 as the center.
It is formed over the same angular range as 10b. Those arcuate grooves 10a, 10b, 11a, 1
Supply and discharge passages 13a, 13b, 14a, and 14b that penetrate the support base A in the thickness direction are respectively opened in 1b, and each pair of supply and discharge passages 13a, 13b and 14a, 14b is provided with a flow passage switch (not shown). Connected to a fluid pressure source via a valve.

Therefore, the auxiliary cutting table B placed on the support table A
A projection (not shown) is provided on the lower surface of the lower frame B1, and by engaging this projection with the center hole 12 of the support base A, the upper frame B1 can be rotated relative to the support base A. As shown in FIG. 3, this lower frame B1 is provided with a cylinder 15, and
A pair of supply/discharge passages 17a and 17b are formed which communicate with each of the pressure chambers partitioned by the piston 16. These supply/discharge passages 17a, 17b are opened at the lower surface of the lower frame B1 at positions where they can overlap with the arcuate grooves 10a, 10b, respectively, and the axial direction of the piston rod 18 connected to the piston 16 is machined into a rod-shaped workpiece (not shown). When arranged parallel to the axial direction of the object, it is located at the center of each arcuate groove 10a, 10b (see FIG. 2). Therefore, the pressure chamber in the cylinder 15 includes supply and discharge passages 17a, 17b, arcuate groove 10a,
10b, communicates with a fluid pressure source via supply/discharge passages 13a, 13b and a flow path switching valve (not shown), and the piston rod 18 is connected to the piston rod 18 by operating the flow path switching valve.
The lower frame B1 can be controlled to advance and retreat, and the lower frame B1 is
It can be rotated left and right by a predetermined angle with respect to the support base A.

Next, the lower frame B1 and the upper frame B2 of the auxiliary cutting table B are slidably engaged with each other by a dovetail groove 19 formed along the axial direction of the piston rod 18, as shown in FIG. As shown in FIG. 1, a connecting plate D is attached to the front end surface of the upper frame B2. By connecting the tip of the piston rod 18 to the connecting plate D, the upper frame B2 can be moved forward and backward in accordance with the movement of the piston rod 18 back and forth.

Further, between the lower frame B1 and the connecting plate D, a passage means E is provided for guiding the pressure fluid supplied to the pair of outer arcuate grooves 11a and 11b to the cylinder of the main cutting table C. That is, Fig. 1, Fig. 3,
In FIG. 4, a pair of holes are bored on both sides of the lower part of the lower frame B1 in parallel with the piston rod 18, and the openings at both ends of each hole are closed with plugs 21 and 22 to form a sealed chamber 20. plug 2
A sealing material 23 is used to maintain liquid tightness between 1 and 22, and an operating rod 24 is slidably passed through the space. At the tip of the operating rod 24, there is a stopper portion 25 at the base.
A second operating rod 26 formed with a
The operating rod 26 is connected to the plug 2 provided on the connecting plate D.
7 is slidably penetrated. At this time, screws 28 for preventing removal are screwed onto the end of the operating rod 24 and the tip of the second operating rod 26, and the maximum distance L ₁ between the stopper portion 25 and the plug 22 that it comes into contact with, The sum of the maximum distance _L2 between the stopper portion 25 and the plug 27 is set to be larger than the stroke amount of the piston rod 18.

Further, supply/discharge passages 29, 30 are formed in the shaft portions of the mutually connected operating rods 24, 26, and each supply/discharge passage 29, 30 is always connected regardless of the displacement position of the operating rods 24, 26. It communicates with the sealed chamber 20 closed by the pair of plugs 21 and 22 or with the sealed chamber 31 of the plug 27 through an opening 32 or 33. As shown in FIG.
The opening positions of the passages 34a and 34b are the second
As shown in the figure, when the passages 17a and 17b are located at the center of the arcuate grooves 10a and 10b, they are set so that they overlap with the outer arcuate grooves 11a and 11b at the center. . On the other hand, the sealed chambers 31 in the pair of left and right plugs 27 are connected to the upper frame through a radial opening 35 formed in the plug 27, an annular groove 36 formed in the connecting plate D, and a passage 37 formed in the connecting plate D. It communicates with a passage 38 formed in B2. As shown in FIG. 5, the pair of passages 38 are formed by a pair of circumferential grooves 39a and 39 concentrically formed on the upper surface of the upper frame B2.
b, respectively.

At the center of the pair of circumferential grooves 39a, 39b,
A center hole 40 is formed in the same manner as the upper surface of the support table A, and a protrusion (not shown) provided on the lower surface of the lower frame C1 of the main cutting table C is engaged with the center hole 40, thereby making the main cutting table C can be rotated relative to the auxiliary cutting table B. And the lower frame C of the main cutting table C
As shown in FIG. 6, 1 includes a cylinder 41 and a piston 4 slidably fitted into the cylinder.
2, and a piston rod 43 connected to the piston 42, each of which communicates a pair of pressure chambers defined within the cylinder 41 by the piston 42 with passages 44a and 44b. These passages 44a and 44b are, of course, open on the lower surface of the lower frame C1 at positions where they can overlap with the circumferential grooves 39a and 39b (see FIG. 5). Furthermore, the lower frame C1 and upper frame C2 of the main cutting table C, like the lower frame B1 and upper frame B2 of the auxiliary cutting table B, are slidable in the axial direction of the piston rod 43 through dovetail grooves 45. In addition, by connecting the tip of the piston rod 43 to a connecting plate (not shown) attached to the tip of the upper frame C2, the upper frame C is moved in accordance with the forward and backward movement of the piston rod 43.
2 can be controlled forward and backward.

In addition, between the support stand A and the lower frame B1 of the auxiliary cutting table B,
and means for preventing separation between the upper frame B2 of the auxiliary cutting table B and the lower frame C1 of the main cutting table C, means for regulating the relative rotation angle therebetween, or means for fixing the relative rotation, etc. Of course there are.

In the above configuration, the cylinder 41 of the main cutting table C has passages 44a, 44b and circumferential grooves 39a, 39.
b, passages 38, 37, annular groove 36, and opening 3
It communicates with the sealed chamber 31 through the opening 3.
3. It communicates with the other sealed chamber 20 through the passages 30, 29 and the opening 32, and from here the passage 34a,
34b, arcuate grooves 11a, 11b, passage 14a,
14b and a fluid pressure source via a flow path switching valve (not shown). Therefore, the upper frame C2 of the main cutting table C can be controlled to advance or retreat by operating the flow path switching valve. In this process, as described above, the upper frame B2 of the auxiliary cutting table B can be controlled to advance and retreat separately, and the operation of the upper frame B2 does not affect the fluid pressure supplied to the cylinder 41. That is, for example, when moving the upper frame B2 to the left from the state shown in FIG.
After the plugs 21 and 22, that is, the lower frame B1, and the operating rod 24 stop moving relative to each other when they come into contact with each other, a relative displacement occurs between the plugs 21 and 22, that is, the lower frame B1, and the operating rod 24, but during that time, the operating rods 24 and 26 respectively move into the sealed chamber 20. , 31 in a slidable manner, even if the above-mentioned relative displacement occurs, no volume change occurs in the supply/discharge passage.
Therefore, by moving the upper frame B2, the cylinder 41
fluid pressure is not affected. As a result, the upper frame B2 of the auxiliary cutting table B and the upper frame C2 of the main cutting table C can be freely controlled to move forward and backward, and the lower frame B1 of the auxiliary cutting table B and the lower frame of the main cutting table C can be controlled independently. It is also possible to freely rotate and displace C2 to a predetermined angular position.

In the above embodiment, the operating rods 24 and 26 are slidably inserted into the sealed chambers 20 and 31, but it is clear that only one of them may be used. Further, the pair of left and right operating rods may be constructed integrally, and in that case, for example, it is preferable that the pair of sealed chambers provided in the lower frame B1 be provided adjacent to each other in the longitudinal direction of the operating rods. Furthermore, although it is preferable to provide each cylinder device in the lower frame, it is also possible to provide the cylinder devices in the upper frame.Furthermore, even if the circumferential grooves 39a and 39b in the above embodiment are arcuate grooves, the main cutting table C It may be provided on the lower surface of the lower frame C1.

As described above, in the present invention, a part of the fluid passage communicating with the cylinder device of the main cutting table is divided into a passage inside the lower frame of the main cutting table, a lower frame of the main cutting table, and an upper frame of the auxiliary cutting table. a circumferential or arcuate groove on the contact surface of
It consists of a passage inside the upper frame of the auxiliary cutting table, an internal passage of the communication plate and the operating rod, and a passage inside the lower frame of the auxiliary cutting table, so it is easy to connect the hose to the auxiliary cutting table separately. This has the effect of completely omitting the connection of the high pressure hose to the cutting table.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional side view showing an embodiment of the present invention, Fig. 2 is a plan view of the support base A, Fig. 3 is a sectional view taken along the - line in Fig. 1, and Fig. 4 is the same as that shown in Fig. 1. of-
5 is a plan view of the upper frame of the auxiliary cutting table B, and FIG. 6 is a sectional view of the main cutting table C. B...Auxiliary cutting table, C...Main cutting table, B1, C
1...Lower frame, B2, C2...Upper frame, 15, 41...
...Cylinder, 38, 44a, 44b...Passway, 3
9a, 39b... Circumferential groove.

Claims (1)

[Scope of utility model registration request] a first lower frame rotatably supported on the bed;
an auxiliary cutting table having a first upper frame slidably provided on the lower frame and a first cylinder device that reciprocates the upper frame with respect to the lower frame; A second lower frame rotatably supported, a second upper frame slidably provided on the second lower frame, and the second upper frame is reciprocated with respect to the second lower frame. In a cutting table having a main cutting table having a second cylinder device that rotates, at least one of the contact surfaces of the first upper frame and the second lower frame has a center of rotation between the two A pair of arcuate grooves or circumferential grooves are formed, and a passage formed in the first upper frame that communicates with the grooves is connected to an internal passage of a connecting plate attached to the first upper frame. communicating with a fluid pressure source via an internal passage of an operating rod slidably provided on at least one of the first lower frames and a passage formed within the first lower frame; A fluid circuit for a cutting table, characterized in that a passage formed in the second lower frame that communicates with the groove communicates with the second cylinder device.