KR20050035855A - A piston clamp of index chuck for a c.n.c lathe - Google Patents

Abstract

The present invention relates to a piston clamp of an index chuck for a C & C lathe capable of exclusively clamping a piston for a swash plate type compressor, and more particularly, a lifting mechanism for lifting up and down from an inner upper portion of an index chuck rotating on a main shaft of a machine tool. In the rotating body rotates by 90 degrees from the inner lower part of the index chuck facing the lifting and lowering operation port, and the pressing hole for pressing the upper part of the piston in idle rotation, the V-block-type base on which the piston is mounted is elastically mounted. By installing vertically, the center portion of the piston, which is formed in a substantially cylindrical shape between the pedestal and the pressing hole, can be easily clamped in a three-point supporting manner.

According to the present invention, the elevating operation tool 22 is installed at the front inner upper portion of the index chuck body 17 in which the opening groove 18 is formed at the front center thereof, and the index chuck corresponding to the elevating operation tool 22 is provided. In the index chuck of the CCC lathe installed in the front inner lower portion of the body 17 to rotate the rotary body 24 formed with a square shaft portion 23 in the middle by 90 degrees, the lower portion of the elevating operation 22 is a piston ( The pressing hole 29 for pressing the rounded upper surface of 6) is installed to be idling, and the insertion groove 39 is inserted into the insertion groove 24a at the lower portion of the insertion groove 24a of the rotating body 24. Insertion grooves 41 are formed in the center of the upper quadrangle body 40, and the pedestal 36 having vertically formed supports 44 having V grooves 43 formed on both upper sides of the quadrangle body 40 is vertically formed. It is fixed to the bolt, the insertion groove 41 of the pedestal 36 is inserted between the two side shoe housing 12 of the piston 6 in the upper portion The straight protrusions 47 are formed, and on both lower portions of the vertical protrusions 47, the inclined support portions 48 on which the lower ends of both shoe housings 12 of the piston 6 are placed in point contact form are inclined outwardly, Saddle 46 is formed in the vertical pillar portion 50 is characterized in that the elastic installation.

Description

A piston clamp of index chuck for a C.N.C lathe}

The present invention relates to a piston clamp of an index chuck for a C & C lathe capable of exclusively clamping a piston for a swash plate type compressor, and more particularly, a lifting mechanism for lifting up and down from an inner upper portion of an index chuck rotating on a main shaft of a machine tool. The press-hole for pressing the upper part of the piston is installed idlingly, and the rotating body that is rotated by 90 degrees at the lower part of the index chuck facing the lifting and lowering operation hole by the piston is mounted on the V-block-type bracket. By installing the vertically, it is to be able to easily clamp the central portion of the piston formed in a substantially cylindrical between the pedestal and the pressing hole in a three-point support manner.

The conventional swash plate compressor 8 shown in FIG. 6 is used to compress a refrigerant required for cooling in an air conditioning system of a vehicle, which is used for discharging refrigerant to both sides of the housing 1 for airtightness of the refrigerant. Covers 2 and 3 having several holes are provided at both sides, and a central axis 5 through which the rotational force of the engine is transmitted to the swash plate 4 is penetrated at the center of the housing 1, and the central axis 5 ) Is coupled to the swash plate (4) for reciprocating the piston (6).

In addition, four to six pistons 6 are inserted into the outer periphery of the swash plate 4, and each of the pistons 6 is inserted into the cylinder 7 formed on the inner periphery of the housing 1. When the refrigerant flows into the cylinder portion 7, the refrigerant is compressed through the compression stroke of the piston 6.

The piston 6 inserted into the general swash plate compressor 8 configured as described above has a cylindrical head portion 10 having the same cylindrical shape as the inner space of the cylinder portion 7 at both ends, as shown in FIGS. 1 and 6. Shoe housings 12 having spherical grooves 11 into which the shoes 9 are to be inserted are formed at both inner sides between the two head portions 10 at intervals C. As shown in FIG.

As shown in FIG. 6, the distance C between the two shoe housings 12 is equal to an interval where the swash plate 4 can be inserted while the hemispherical shoes 9 are positioned on both sides of the swash plate 4. The lower portion of the two shoe housings 12 is rounded in a semicircular shape, and the upper portion between the two shoe housings 12 is called the connecting portion 13.

The present invention is to deal with the piston clamp for stably clamping the piston (6) in order to cut the two head portion 10 of the piston (6) in a machine tool as described above, the conventional piston (6) It will be described with respect to the cutting of both heads 10 of the head) in a machine tool.

First, in the prior art, when cutting both head portions 10 of the piston 6 in a machine tool, a piston clamp for clamping the piston 6 as shown in FIG. 1 in the machine tool has not been provided.

Therefore, when machining the piston 6 conventionally, after cutting one side head portion 10 of the piston 6 to the chuck of the lathe, the other free end side head portion 10 which is not bitten by the chuck is primarily cut. It is difficult to produce a large amount of uniform high quality products because the second part of the other side of the non-cutting machine is processed secondly after processing and separating it from the chuck and then biting the processed part side to the chuck again. There was.

The present invention is to solve the above problems, but to provide a piston clamp that can be clamped exclusively to the piston of the swash plate compressor in the index chuck of the CCC shelf, the swash plate compressor in the piston clamp of the index chuck The piston can be easily and accurately bite, and the piston can be rotated 180 degrees horizontally to stop even when the piston is bitten by the piston clamp, thereby efficiently cutting both heads of the piston bitten by the index chuck. It is a technical problem.

The present invention for achieving the above object, the elevating operation mechanism is installed to be raised and lowered on the front inner upper portion of the index chuck body formed with an open groove in the front center portion, the front inner side of the index chuck body corresponding to the elevating operation mechanism In the index chuck of the CCC lathe installed to rotate the rotating body by 90 degrees in the lower portion, the pressing hole for pressing the rounded upper surface of the piston is installed in the lower portion of the elevating operation opening to be idle, the insertion groove of the rotating body Insertion shaft is inserted into the insertion groove is formed, the insertion groove is formed in the center of the square body of the upper side, the support is formed by fixing the bolt is vertically installed with the support that formed the V groove on the upper both sides of the square body, the bolt of the The insertion groove is provided with a vertical protrusion which is inserted between the shoe housings of both sides of the piston at the upper portion, and the lower portion of the piston at the lower sides of the vertical protrusion. The shoe housing and the lower end of the inclined sloping portion which rests with a contact point outward, characterized in that the saddle is formed in the lower parts of the vertical columns installed flexibly.

Hereinafter, with reference to the accompanying drawings, Figs. 1 to 5 with respect to the piston clamp of the CNC shelf index chuck according to the present invention.

The piston clamp of the CNC shelf index chuck according to the present invention is a known index chuck 16 installed and rotated on the main shaft 15 that is installed to be rotated to the machine body 14 of the CNC shelf as shown in Figs. As installed in the), the index chuck 16 is installed on the rotating main shaft (15) and the piston reciprocating by hydraulic pressure inside the index chuck body (17) having an opening groove (18) in front The cylinder part 20 provided with 19 is provided, and the lower end part is provided in the front inner upper part of the index chuck body 17 by the rotation lever 21 which rotates in a zigzag manner according to the reciprocation of the piston part 19. As shown in FIG. A lifting lowering operation tool 22 for lifting up and down to the open groove 18 side is provided.

In addition, the front and rear lower portions of the index chuck body 17 corresponding to the elevating operation tool 22 are rotatably provided with a rotating body 24 having a square shaft portion 23 formed therebetween. 4 and 5, the first and the second push rods 25 and 26 are installed in the lower side of the bottom to push the square shaft portion 23 to the cylinder portion 27 installed at a predetermined angle. It is.

Since the index chuck 16 described above is well known as mentioned above, it is not described in detail, and it is natural that each of the cylinder parts 20 and 27 is provided with a doorway 28 through which hydraulic pressure enters and exits.

The piston clamp 100 according to the present invention has an upper shaft portion 31 is inserted into the lower portion of the elevating operation 22 in the upper portion of the flange portion 30 as shown in Figure 1 to 4, the plan The lower part of the branch 30 is formed with a pressing tube portion 33 for pressing the rounded upper surface of the piston 6, the pressing hole 29 is formed with a two-stage through-hole 32 above and below the center portion of the upper shaft portion 31. Each of the upper and outer circumferences is inserted into the lower portion of the elevating operation port 22 while the upper bearing 34 and the outer circumferential bearing 35 are inserted, and are installed by bolts installed upwardly in the two-stage through hole 32.

In addition, a pedestal 36 is installed in a vertical direction on an upper portion of the rotating body 24 provided at a lower side corresponding to the elevating operation tool 22, and the pedestal 36 has a rotating body below the flange portion 37. An insertion shaft 39 having a locking jaw 38 inserted into the insertion groove 24a of the 24 is formed, and the insertion groove 41 is formed in the square body 40 upwardly formed on the upper portion of the flange portion 37. Is formed, and the front and rear of the rectangular body 40 is formed with a screw hole 42 leading to the insertion groove 41, the support 44 formed with the V groove portion 43 on the upper both sides of the rectangular body 40 Is formed vertically.

In the insertion groove 41 between the both sides of the support 44, the saddle 46 on which the piston 6 is placed on the upper portion is elastically installed with the spring 45 inserted in the lower portion. The saddle 46 has a vertical protrusion 47 which is inserted between the two shoe housings 12 of the piston 6 at the upper part, and both shoe housings of the piston 6 at the lower sides of the vertical protrusion 47. 12) The inclined support portion 48 on which the lower end is placed in point contact manner is formed to be inclined outwardly, and the end of the fixing screw 51 inserted into the screw hole 42 in front and rear is formed at the center lower portion between the two inclined support portions 48. The vertical pillar 50 forming the long groove 49 to be inserted protrudes downward.

Referring to Figures 1 to 4 the working relationship of the present invention configured as described above is as follows.

As shown in FIG. 4, the pusher 29 installed downward in the lower part of the elevating operation tool 22 so as to be idling, the pedestal 36 installed upward in the upper part of the rotating body 24, and the saddle inserted in the upper part of the pedestal 36. In the case where the piston clamp 100 of the present invention consisting of 46 is installed on the index chuck 16 and the clamp 6 is to be clamped between the pressing hole 29 and the saddle 46, When the elevating operation tool 22 installed at the front inner side upper portion of the index chuck 16 is kept upward, the elevating operation tool 22 is raised, so that the lower end of the presser 29 and the saddle 46 A predetermined gap is opened between the upper ends so that the piston 6 can be inserted at that interval.

When the piston 6 is inserted between the lower end of the upper pusher 29 and the upper end of the saddle 46, as shown in FIGS. 1 and 2, between the shoe housing 12 formed on both lower sides of the piston 6. Is inserted into the vertical protrusion 47 of the saddle 46, the width of the vertical protrusion 47 is slightly narrower than the distance (C) between the two shoe housing 12 so that the groove portion between the two shoe housing 12 The vertical protrusion 47 is inserted into and placed on it.

At this time, since the height H1 of the vertical protrusion 47 is lower than the height H2 of the shoe housing 12 and the inclined support 48 is formed to be inclined outward on both sides of the vertical protrusion 47 having a low height, the piston ( When 6) is placed on the upper portion of the vertical protrusion 47, the inner edges of both shoe housings 12 are point-contacted to the inclined support 48 as shown in FIG.

When the pusher 29 is lowered in this state, as shown in FIG. 3, the bottom surface of the pusher tube part 33 at the bottom of the pusher 29 is mounted on both side inclined support parts 48 of the saddle 46 ( 6) Press down while touching the upper rounded back part.

When pressing the rounded upper portion of the piston 6 with the pusher 29 as described above, the spring 45 is elastically installed at the lower end of the saddle 46 on which the piston 6 is placed, and thus the pusher 29 is pressed. The spring 45 is compressed by the force and at the same time the saddle 46 on which the piston 6 is placed is lowered. As the lowering piston 6 is lowered, both side shoe housings 12 of the rounded piston 6 are lowered. ) Contacts the V-groove 43 of the support 44 on which the saddle 46 is installed, the saddle 46, the piston 6, and the pressing hole 29 are not lowered anymore, and the bottom surface of the pressing pipe part 33 The V-groove 43 is clamped tightly.

At this time, as the bottom surface of the presser tube part 33 is formed in a horizontal state in a state where the top surface of the piston 6 is rounded, the rounded top surface of the piston 6 and the bottom surface of the presser tube part 33 in a horizontal state are illustrated in FIG. 3. As can be seen, the point contact (a) is at a point in the upper portion, and the lower side of both shoe housings 12 are rounded at the bottom and the V-groove 43 in which the round shoe housings 12 are in contact is "V". As it is formed in the shape of a child, the two points of inclination of the V-groove 43 and the two diagonally lower portions of the round shoe housing 12 are in point contact with each other, resulting in two point contact points b and c.

Accordingly, the piston 6, which is bitten between the bottom face of the presser tube part 33 and both inclined surfaces of the V-groove 43, has one point (a) at the top and one point (b, c) at both sides of the lower part, respectively, and three contact points. The piston 6 can be stably clamped between the bottom face of the presser tube part 33 and the inclined surfaces on both sides of the V-groove 43 by (a, b, c). 12, the lower edge portion of the saddle 46 is in contact with both of the inclined support portion 48 so that the piston 6 bitten by the piston clamp 100 of the present invention is moved by both inclined support portion 48 in the horizontal direction It is impossible to fix, and the piston 6 is firmly clamped by the bottom surface of the press pipe part 33 and the two inclined surfaces of the V-groove 43 in which the three points contact each other.

As described above, the piston clamp 100 of the present invention is lowered to clamp the piston 6 by the action of a known index chuck 16, which is a piston unit installed inside the index chuck body 17. When the tip portion of the pivoting lever 21 coupled with the elevating operation tool 22 by the operation of (19) is angularly squeezed downward, the lifting mechanism coupled to the distal end of the pivoting lever 21 descending in this manner is The pupil 22 is to be lowered so that the piston 6 can be pressed down.

As described above, when the piston 6 is to be cut into the head portion 10 of the piston 6 while the piston 6 is clamped to the piston clamp 100 of the present invention, as shown in FIGS. When the bite 101 is brought into contact with the head portion 10 of the piston 6 while the index chuck 16 is rotated, the cutting is performed in the same way as the cutting of the workpiece on a general lathe.

In this way, after the cutting of the one side head portion 10 is performed, as shown in FIGS. 4 and 5, the first and second rotations of the rotating body 24 installed in the known index chuck 16 are rotated by 90 degrees. As the push rods 25 and 26 push the square shafts 23 of the rotor 24 to the respective cylinders 27, the rotor 24 rotates twice by 90 degrees and rotates 180 degrees. The head portion 10, which has not been processed, comes out to the position to be processed.

As described above, when the rotating body 24 rotates by 90 degrees, the piston clamp 100 of the present invention is in a state in which the piston 6 is tightly held, and the upper side pressing holes 29 are respectively upper and outer periphery surfaces. Since the bearing 34 and the outer circumferential bearing 35 are installed, the piston clamp 100 in a state where the piston 6 is bite can rotate by 90 degrees as the rotor 24 rotates.

When the head portion 10, which was not processed in this way, comes out to the position to be processed, it is possible to perform the same cutting process as the one side is cut with the bite 101, and then release the clamping after the processing is completed. The opposite is true when clamping.

As described above, the piston clamp of the C & C lathe index chuck of the present invention is installed in the main shaft of the machine tool to install a pressing hole for pressing the upper part of the piston to the lifting and lowering operation opening and lowering from the inner upper portion of the rotating index chuck, The rotating body rotated by 90 degrees from the inner lower side of the index chuck facing the lifting and lowering operation port is installed vertically by installing a V-block-shaped pedestal in which the pistons are mounted resiliently, thereby forming a substantially cylindrical shape between the pedestal and the pusher. The central part of the piston can be easily clamped in a three-point supporting manner to effectively cut the piston which is to process both head parts.

1 is an exploded perspective view for explaining that the piston is clamped to the piston clamp according to the present invention.

Figure 2 is a side cross-sectional view showing a state where the piston is clamped to the piston clamp according to the present invention.

Figure 3 is a front sectional view showing a state where the piston is clamped to the piston clamp according to the present invention.

Figure 4 is a side cross-sectional view showing a state in which the piston clamp according to the invention installed on the index chuck.

5 is a cross-sectional view taken along the line A-A of FIG.

6 is a cross-sectional view showing a conventional general swash plate compressor.

<Explanation of symbols for main parts of drawing>

1 housing 2 cover 3 cover

4 swash plate 5 central axis 6 piston

7 cylinder portion 8 swash plate compressor 9 shoe

10 head portion 11 spherical groove 12 shoe housing

13 connection part 14 machine body 15 spindle

16: index chuck 17: index chuck body 18: the opening groove

19: piston 20: cylinder 21: rotation lever

22: lifting device 23: square shaft portion 24: the rotating body

25: primary push rod 26: secondary push rod 27: cylinder

 28: entrance 29: pressing hole 30: flange

31: upper shaft portion 32: two-stage through hole 33: pressing pipe portion

34: top bearing 35: outer bearing 36: pedestal

37: flange portion 38: locking jaw 39: insertion shaft

40: square body 41: insertion groove 42: screw hole

43: V groove 44: support 45: spring

46: saddle 47: vertical protrusion 48: inclined support

49: long groove 50: vertical column 51: fixed screw

100: piston clamp 101: byte

Claims (1)

The cylinder part 20 provided with the piston part 19 which reciprocates by hydraulic pressure inside the index chuck body 17 which rotates and is installed in the main shaft 15 of the CNC shelf and formed the opening groove 18 in the front. Is installed, the lower and lower end of the index chuck body 17 is lowered to the open groove 18 side by the pivoting lever 21 which rotates in a reciprocating manner in accordance with the reciprocating movement of the piston 19 A copper ball 22 is installed, and the rotary body 24 having the square shaft portion 23 formed thereon is rotatable 90 degrees at the front inner lower portion of the index chuck body 17 corresponding to the elevating operation tool 22. In the lower side of the index chuck body 17, the primary and secondary push rods 25 and 26 are able to push the square shaft portion 23 to the cylinder portion 27 installed at a predetermined angle, respectively. In the index chuck of the installed oneCNC shelf, The upper and lower portions of the flange portion 30, the upper shaft portion 31 and the pressing tube portion 33 is formed in the lower portion of the elevating operation mechanism 22 and the pressing hole 29 formed with two-stage through-holes 32 in the vertical direction. ) Is inserted into the lower portion of the elevating operation port 22 in a state where the upper bearing 34 and the outer bearing 35 are inserted into the upper surface and the outer periphery of the upper shaft portion 31 so as to be installed upward in the two-stage through hole 32. Installed by bolts, Square body 40 and the insertion shaft 39 is formed in the upper and lower portions of the flange portion 37, the insertion groove 41 is formed in the square body 40, the insertion groove 41 in the front and rear of the square body 40 A screw hole 42 is formed to pass through, and the insertion shaft 39 of the pedestal 36 on which the support 44 formed with the V-groove 43 is vertically formed on both upper sides of the square body 40 is a rotating body ( Inserted into the insertion groove (24a) of the 24) and fixed with bolts, Vertical protrusions 47 are formed in the upper portion between the two shoe housings 12 of the piston 6, and lower ends of both shoe housings 12 of the piston 6 are point-contacted on both lower portions of the vertical protrusions 47. The inclined support portion 48 to be mounted in such a way is formed to be inclined outward, the saddle 46 formed to protrude downward in the center lower portion between the inclined support portion 48, the vertical pillars 50 formed in the front and back 49 in the front and rear. The vertical column 50 of the inserted into the insertion groove 41, the spring 45 is inserted into the state, the fixing groove 51 is fastened to the long groove 49 of the vertical column 50 by the screw hole 42 Piston clamp of the index chuck for oneCNC shelf, characterized in that the end of the) is fixedly installed.