JP2011115871A - Vice for finishing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely and easily chuck a work. <P>SOLUTION: While forming a tapered surface 5a having a surface normal rising toward the base part 2 side in a clamper part 4 of the respective distal ends of the fixed jaw 3a and the movable jaw 3b for sandwiching the work W, a tapered surface T opposed at the substantially same angle to the tapered surface 5a formed in the clamper part 4 is also formed in the work W sandwiched by this clamper part 4. When both tapered surfaces 5a and T are allowed to abut on each other by relatively approaching both clamper parts 4 and 4, the work W is pressed to a base part 2 by this abutting force, and the work W is surely fixed to this base part 2. Thus, even in a constitution for making the relatively large moment act on the work W such as a 5-axis control finishing machine, this work W does not move and slip out in processing, and high processing accuracy can be secured. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a processing machine vise for fixing a workpiece to a processing machine.

  A vise for a processing machine is used when chucking a work on a table of the processing machine when processing a work (object to be processed) using a processing machine such as a 5-axis control machining center. . An example of this 5-axis control processing machine is schematically shown in FIG. 9, and the operation thereof will be described. When the processing tool 16 side performs 3-axis control in the X, Y, and Z-axis directions, Rotation control around the X axis (rotation A axis) and Z axis (rotation C axis) is performed on the placed table 17 side, so that a total of 5 axes (linear 3 axes + rotation 2 axes) is controlled. It has become. With this 5-axis control, a workpiece W having a complicated three-dimensional shape such as an impeller or a cylinder head of a turbo engine can be machined without re-chucking the workpiece W during machining. It is possible to avoid a decrease in processing accuracy due to a positional shift at the time of chucking.

  In machining by this 5-axis control, for example, when the A-axis is rotated 90 degrees, the machining tool 16 may act sideways with respect to the workpiece W (see FIG. 6 described in the embodiment of the present invention). reference). Moreover, in this 5-axis control, the workpiece W is generally raised so that the peripheral members of the processing tool 16 and the vice 1 or the like that fixes the workpiece W do not interfere when the A-axis is inclined. is there. In this case, the distance between the chucking portion of the workpiece W by the vice 1 and the point of action of the force by the machining tool 16 is increased, and a large moment is generated, and the workpiece W may rattle and move during machining. In order to prevent this rattling, the workpiece W is required to be reliably chucked.

  On the other hand, in the machining by the 5-axis control, since the workpiece W can be machined from multiple directions, it is required to make the chucking allowance of the workpiece W as small as possible in order to make the most of its merit. . Further, by reducing the chucking allowance, it is possible to reduce the portion to be removed after the completion of machining (this chucking portion) and to reduce the material loss of the workpiece W.

  In order to satisfy the conflicting demands of reliably performing this chucking and reducing the chucking allowance, the work W is chucked by firmly pinching the small chucking allowance with the jaw 3 of the vice 1. Can be considered. However, in the case of such strong chucking, the jaw 3 is deformed so as to be separated from the base portion 2 (support portion that directly supports the workpiece W) of the processing machine as indicated by an arrow in FIG. As a result, the workpiece W floats from the base portion 2 and becomes unstable. If the workpiece W is machined in this unstable state, the workpiece W moves due to vibration during machining and a predetermined machining accuracy cannot be secured, or the workpiece W is detached from the vice 1. May result.

  In order to avoid such troubles, for example, in Patent Document 1 below, a stepped portion for supporting a workpiece is formed on the upper portion of a pair of jaws for chucking the workpiece, and one jaw below the stepped portion is formed. A configuration is adopted in which a female screw sleeve is provided on the side and a bolt to be screwed into the female screw sleeve is provided on the other jaw side (see FIG. 1 and the like of the same document). According to this configuration, when the tip of the jaw is deformed due to chucking of the workpiece, the bolt is screwed into the female screw sleeve to apply a tightening force, thereby restoring (or preventing) the deformation of the jaw. can do.

JP 2008-264983 A

  In the configuration shown in Patent Document 1, each jaw is screwed into a spindle for chucking a workpiece, and whether or not the tip of the jaw is deformed is checked. It is necessary to screw in the bolt. That is, in this chucking, it is necessary to alternately perform screwing (spindle and female thread sleeve) at two locations, and the work is complicated. In addition, since it is necessary to drill a hole for attaching a female screw sleeve or the like attached to the jaw, there is a problem that the part cost and the machining cost increase accordingly.

  Therefore, an object of the present invention is to reliably and easily perform chucking of a workpiece.

  In order to solve the above-mentioned problems, the present invention provides a processing machine vise comprising a base portion on which a workpiece is placed and a plurality of jaws that sandwich the workpiece on the base portion, and chucking the workpiece of the jaw. A tapered surface having a surface normal that stands up toward the base portion side is formed on the clamper portion, and the tapered surface is brought into contact with the tapered surface so as to face the tapered surface. The structure in which the workpiece is pressed against the base portion by this contact force is employed.

  As described above, when the tapered surface having the surface normal is formed on the clamper portion of the jaw, a force directed toward the base portion can be applied to the tapered surface of the workpiece sandwiched by the jaw. That is, the workpiece can be firmly pressed against the base portion, and troubles that the workpiece moves or comes off during machining can be prevented. The angle of the taper surface is not particularly limited as long as the force directed to the base portion is applied. For example, the angle formed with the base portion can be easily machined such that the angle formed with the base portion is 45 degrees or 60 degrees. It is preferable to set the angle as follows.

  Even in this configuration, when the jaw is strongly tightened, the clamper portion at the tip of the jaw is deformed by the reaction force from the workpiece (this clamper portion is displaced in the opposite direction of the base portion, see FIG. 10B). However, even in this case, as long as the clamper portion is not greatly deformed beyond the taper angle of the taper surface, the taper surface is `` tapered surface having a surface normal rising toward the base portion side ''. There is no change. That is, the work pressing action of the jaw clamper portion is not impaired, and there is a low possibility that the workpiece will come off the clamper portion during processing.

  Moreover, in the said structure, it is more preferable to comprise so that the said jaw can move independently of the said base part.

  This base portion has an important role of ensuring the machining accuracy when machining with a machining tool by firmly supporting the workpiece. Therefore, if the jaw is configured to move independently of the base portion, even when the clamper portion at the tip of the jaw is opened as the jaw is tightened as described above, the movement of the jaw is Irrespective of this, the initial posture (contact state) of the base portion is maintained. And since a workpiece | work is pressed against this base part, the attitude | position of this workpiece | work is also stabilized and the high processing precision can be ensured.

  In a vise for a processing machine having a plurality of jaws, it is ideal that all the jaws can be moved independently of the base portion, so that the initial posture of the base portion is maintained. If at least one of them is configured to move independently of the base portion, even when the clamper portion of the independently moving jaw is opened, the pressing action of the workpiece is exhibited, so that the workpiece is stably supported. be able to.

Moreover, in each said structure, it is more preferable to arrange | position the clamper parts of the said jaws so that it may mutually oppose, and to comprise each jaw in the said opposing direction.
By disposing the jaws in this way, it is possible to reliably chuck a workpiece having two opposing surfaces, such as a rectangular bottom surface, and stably support the workpiece.

Alternatively, instead of arranging the jaws to face each other, the jaws are arranged on the circumference of a circle, and the jaws are directed toward the center of the circle so that each jaw It is more preferable to make the contact and separation in the radial direction of the circle.
By disposing the jaws in this way, it is possible to evenly chuck a workpiece having a circular bottom shape from its outer peripheral surface and to stably support the workpiece in the same manner as described above.

A circumferential groove-like gripping groove is formed on the outer periphery of the vice main body for fixing the base portion and the jaw, and the gripping groove is gripped so that the vice main body is attached to and detached from the fixing jig. It is preferable to do so.
By configuring the gripping groove so as to be gripped by, for example, a clamping unit (machine tool vise) exchanging device of a machining center, the machine tool vise can be automatically replaced. That is, it becomes possible to fully automate the machining of the workpiece, and the efficiency of the machining operation can be greatly improved.

Further, the processing machine vise shown in each of the above configurations is particularly suitable for use in a 5-axis control processing machine.
As described above, this 5-axis control processing machine can process a workpiece from multiple directions, and in the processing, a larger lateral direction than the conventional 3-axis control processing machine or the like. Moments often act. At this time, if the support state of the workpiece is unstable, the workpiece may move during machining, and a predetermined machining accuracy may not be obtained. Further, in a 5-axis control processing machine with a large movable range of the table, the workpiece may be supported in the opposite direction by the vice (upside down state). In this case, not only the moment accompanying processing but also the load of the workpiece itself acts on the jaw of the vice, and the support state of the workpiece tends to become more unstable. Therefore, when the vise having the above-described configuration is used for a 5-axis control processing machine, the workpiece can be pressed against the base portion by the jaws of the vise and reliably chucked, so that good machining accuracy can be ensured. it can.

  According to the present invention, a taper surface is formed on the clamper portion of the jaw, and a taper surface that contacts the taper surface is also formed on the workpiece side. I was able to be pressed against. For this reason, this workpiece | work is stably supported by the base part, and favorable processing accuracy can be obtained.

The perspective view which shows 1st embodiment of the vise for processing machines which concerns on this invention. 1 shows a first embodiment of the present invention, (a) is a plan view, (b) is a left side view, (c) is a front view, and (d) is a right side view. The exploded perspective view which shows 1st embodiment of this invention Side view showing the action of chucking in the first embodiment of the present invention Side view showing the effect of chucking in other shapes The perspective view which shows the usage condition of 1st embodiment of this invention. The perspective view which shows the usage condition of 2nd embodiment of this invention. The perspective view which shows the usage condition of 3rd embodiment of this invention. Perspective view showing a general 5-axis control machining center It is a side view which shows the chucking state of the workpiece | work by a jaw, Comprising: (a) is a case where a chucking force is small, (b) is a case where a chucking force is large

  1 to 5 show a first embodiment of a processing machine vise 1 according to the present invention. The processing machine vise 1 includes a base portion 2 on which a workpiece W is placed, and two jaws 3 and 3 that sandwich the workpiece W on the base portion 2, and each jaw 3 that sandwiches the workpiece W, The third clamper portion 4 is formed with a tapered surface 5a having a surface normal that rises toward the base portion 2 side. The taper angle θ of the taper surface 5a with respect to the base portion 2 is 60 degrees. One of the two jaws 3, 3 is a fixed jaw 3 a that moves integrally with the vice body 6, while the other jaw 3 is fitted in a groove portion 7 formed in the vice body 6. The movable jaw 3b can be freely contacted and separated from the fixed jaw 3a by sliding in the groove portion 7.

  The fixed jaw 3a is fixed to the vice body 6 with a fixing bolt 3c, and can be appropriately replaced with another fixed jaw 3a having a different taper angle θ. Since the fixed jaw 3a can be exchanged in this way, the fixed jaw 3a corresponding to the taper angle θ of the taper surface T of the workpiece W, which will be described later, can be selected. Therefore, the workpiece W is chucked by the clamper portion 4 of the fixed jaw 3a. The king can be performed reliably.

  On the other hand, a screw hole that penetrates in the sliding direction is formed inside the movable jaw 3b, and a round nut housing portion 8 that faces the bottom surface of the movable jaw 3b is formed in the middle of the screw hole. . And in this round nut accommodating part 8, the round nut 9 which formed the screw hole penetrated to a side surface direction is accommodated. One adjusting bolt 10 is screwed into the screw hole formed in the movable jaw 3b and the screw hole formed in the round nut 9 from the sliding direction of the movable jaw 3b. Then, the movable jaw 3b moves relative to the vice main body 6 in the sliding direction, and the interval between the fixed jaw 3a and the movable jaw 3b can be adjusted as appropriate. In addition, a jaw portion 11 is formed on the bottom of the movable jaw 3b, while a flange portion 12 is formed on the upper portion of the groove portion 7, and the jaw portion 11 abuts on the flange portion 12 to move the movable jaw 3b. Is prevented from slipping out above the groove portion 7.

  As described above, a taper surface T having a taper angle θ corresponding to the taper angle θ of the taper surface 5 a formed on the clamper portion 4 is formed in advance on the workpiece W sandwiched by the clamper portion 4. That is, the end portion of the workpiece W in which the tapered surface T is formed in an inverted trapezoidal groove (so-called “ant groove”) formed by the opposing clamper portions 4 and 4 and the base portion 2 and having a width wider toward the groove bottom. The workpiece W is not easily detached from the clamper portion 4 (jaw 3). In addition, when both the clamper parts 4 and 4 are relatively approached and chucked so that the tapered surface 5a of the clamper part 4 and the tapered surface T of the workpiece W are brought into contact with each other, as shown in FIG. The workpiece W is pressed against the base 2 by this contact force (see the white arrow in the figure) (see the downward arrow in the figure), and the work W is securely fixed to the base 2. The The taper angle θ of the taper surface T of the workpiece W may be appropriately changed so as to match the taper angle θ of the taper surface 5a formed on each of the jaws 3a and 3b, but the taper surface T can be easily machined. Therefore, it is preferable to be within a range of 45 to 60 degrees.

  As described above, instead of forming the tapered surface 5a on the clamper portion 4, a V-shaped projection 5b is formed as shown in FIG. 5, and a V-shaped groove V into which the V-shaped projection 5b is fitted is formed at the end of the workpiece W. It may be formed. Also in this case, the work W is pressed against the base portion 2 by the contact force between the V-shaped protrusion 5b and the V-shaped groove V (see the white arrow in the figure) (see the downward arrow in the figure). The workpiece W is reliably chucked to the base portion 2.

  A notch 13 is formed at the end opposite to the base 2 of the processing machine vise 1, and the notch 13 is provided on a table such as a machining center as shown in FIGS. 3 and 6. The processing machine vise 1 is fixed by being fitted to a fixing jig 14. As described above, this table can rotate around the two axes of the A axis and the C axis, but as shown in the figure, even when the table is inclined 90 degrees around the A axis and the workpiece W is turned sideways. The workpiece W is reliably chucked by the processing machine vise 1. For this reason, there is little possibility that the workpiece W moves during machining, and machining with high accuracy can be performed.

  A circumferential groove-shaped gripping groove 15 is formed on the outer periphery of the vice body 6 of the processing machine vise 1. By grasping the gripping groove 15 by the clamping unit exchanging device of the machining center, the processing machine vise 1 can be automatically replaced. That is, it is possible to fully automate the processing of the workpiece W, and the efficiency of the processing operation can be greatly improved.

  FIG. 7 shows a second embodiment of the processing machine vise 1 according to the present invention. This processing machine vise 1 is similar to the processing machine vise 1 shown in FIG. 1 and the like in that it includes a base portion 2 and a jaw 3 having a clamper surface 4 formed with a tapered surface 5a. The difference is that two movable jaws 3b and 3b facing the jaw 3a are provided. Similar to the first embodiment, the fixed jaw 3a is fixed to the vice main body 6 with a fixing bolt 3c, and can be appropriately replaced with another fixed jaw 3a. Each movable jaw 3b has the same structure as already described, and the adjustment bolt 10 screwed into each movable jaw 3b is adjusted to appropriately adjust the distance between the fixed jaw 3a and the movable jaw 3b. To do. By providing the plurality of movable jaws 3b in this manner, the workpiece W can be more reliably chucked.

  A third embodiment of the processing machine vise 1 according to the present invention is shown in FIG. This processing machine vise 1 is similar to the processing machine vise 1 described in FIG. 1 and the like in that it includes a base portion 2 and a jaw 3, but the three jaws 3 are arranged on the circumference of a circle. It differs from the first and second embodiments in that it is arranged and in that a V-shaped protrusion 5b is formed in the clamper portion 4. Each jaw 3 is a movable jaw 3b whose bottom is fitted in a groove 7 formed in the vice main body 6 and can slide in the radial direction of the circle within the groove 7.

  The workpiece W sandwiched by the clamper portion 4 is preferably a workpiece having a cylindrical bottom portion, and a V-shaped groove in which a V-shaped protrusion 5b formed on the clamper portion 4 is fitted on the outer peripheral surface of the bottom portion. V is previously formed in a circumferential groove shape. And the clamper part 4 of the movable jaw 3b arrange | positioned so that this workpiece | work W may be enclosed will be in the state fitted in the edge part of the workpiece | work W, and this workpiece | work W is easy from the clamper part 4 (movable jaw 3b). It is designed not to come off. Moreover, when the respective clamper portions 4 are brought relatively close to each other so that the V-shaped projections 5b of the clamper portions 4 and the V-shaped grooves V of the workpiece W come into contact with each other, as shown in FIG. The workpiece W is pressed against the base portion 2 by the contact force, and the workpiece W is securely fixed to the base portion 2. An adjustment bolt 10 is provided on the side surface of the vice main body 6, and the distance between the movable jaws 3b is appropriately adjusted by adjusting the screwing amount.

  The mechanism for bringing the jaws 3 closer to each other shown in the above embodiments is not limited to the mechanism described in FIG. 1 and the like, and other known mechanisms may be appropriately employed as long as they have the same action. Needless to say, it can be done.

DESCRIPTION OF SYMBOLS 1 Vise for processing machines 2 Base part 3 Jaw 3a Fixed jaw 3b Movable jaw 3c Fixed bolt 4 Clamper part 5a Tapered surface 5b V-shaped protrusion 6 Vise main body 7 Groove part 8 Round nut storage part 9 Round nut 10 Adjustment bolt 11 Jaw part 12 鍔Part 13 Notch part 14 Fixing jig 15 Grasping groove

Claims (6)

In a vise for a processing machine comprising: a base portion (2) for placing a workpiece (W); and a plurality of jaws (3) that sandwich the workpiece (W) on the base portion (2).
A taper surface (5a) having a surface normal rising toward the base portion (2) is formed on the clamper portion (4) for chucking the workpiece (W) of the jaw (3). A surface (5a) and a tapered surface (T) formed so as to face the tapered surface (5a) are brought into contact with the workpiece (W), and the workpiece (W) is brought into contact with the base ( A processing machine vise characterized by being pressed against 2).   The vise for a processing machine according to claim 1, wherein the jaw (3) can move independently of the base portion (2).   The clamper portions (4) of the jaws (3) are arranged so as to face each other so that the jaws (3) can contact and separate in the facing direction. Vise for processing machine described.   The jaw (3) is arranged on the circumference of a circle, the clamper portion (4) of the jaw (3) is directed toward the center of the circle, and each jaw (3) is in contact with the radial direction of the circle. The vise for a processing machine according to claim 1 or 2, wherein the vise is capable of being separated.   A circumferential groove-like grip groove (15) is formed on the outer periphery of the vice main body (6) for fixing the base portion (2) and the jaw (3), and the vice main body (15) is gripped by the grip groove (15). The vise for a processing machine according to any one of claims 1 to 4, wherein 6) is attached to and removed from the fixing jig (14). .   The vise for a processing machine according to any one of claims 1 to 5, which is used for a 5-axis control processing machine.

Images