JP7349267B2 - Removable workpiece temporary holder - Google Patents

Description

TECHNICAL FIELD The present invention relates to a removable workpiece temporary support for supporting a workpiece that can be attached to and removed from a machine tool without using tools.

2. Description of the Related Art Some machine tools have a tailstock relative to a headstock to rotatably support a workpiece during machining. In such a machine tool, a workpiece is held by a spindle chuck attached to the spindle, and the center of the tailstock is pressed against the rotation center of the workpiece from the side opposite to the spindle chuck. A workpiece with both ends supported in the axial direction is rotated with its center aligned with the main axis, and a turning process is performed in which a cutting tool is applied to the workpiece. Many of the workpieces that are machined in this way are long in the axial direction, and a temporary workpiece support is used to support the workpiece when it is held down by the center. Patent Document 1 listed below discloses a support stand in which a V-shaped block is raised and lowered by a lifting cylinder to support a workpiece.

Japanese Patent Application Publication No. 7-68402

The support stand disclosed in Patent Document 1, cited as a conventional example, has a complicated structure and is large in size, so that the support stand itself is expensive. In addition, since the tool remains positioned at the processing location, long chips generated from the workpiece by the cutting tool become entangled. Therefore, in order to simplify the structure of the workpiece temporary support, reduce costs, and eliminate entanglement of chips, a workpiece temporary support that can be easily attached and detached before processing is desired.

SUMMARY OF THE INVENTION In order to solve this problem, it is an object of the present invention to provide a removable workpiece temporary holder that can be attached to and removed from a machine tool without using tools.

The removable workpiece temporary holder according to the present invention has a removable part formed at one end of the removable part that is attached to the mounting part of a machine tool configured on a vertical surface so as to hang from above, and a removable part for the mounting part of the machine tool configured on a vertical surface. a rod-shaped support member whose horizontal orientation is maintained by attachment of the support member; and a workpiece receiving portion that is provided at the tip opposite to the attachment/detachment portion so as to be perpendicular to the support member and that is applied to the workpiece from below. a workpiece receiving member having a variable mechanism for moving the position up and down; a receiving plate, the variable mechanism is such that the work receiving plate is assembled to the guide member such that the work receiving plate is moved downward a predetermined distance from a temporary receiving position where the work receiving portion is in contact with the work; A stopper member is provided for positioning the workpiece receiving plate at a temporary receiving position, the guide member is a guide block fixed to the tip of the supporting member and forming a through hole with a rectangular cross section, and the workpiece receiving plate is , a first plate that moves through the through hole of the guide member and is positioned by the stopper member, and a second plate that is assembled so as to be movable up and down with respect to the first plate, An adjustment screw is screwed into the convex portion of the plate, and an adjustment mechanism is provided in which the upper end of the adjustment screw is applied to the convex portion of the second plate.

According to the above configuration, when the workpiece is supported by the workpiece receiving member orthogonal to the rod-shaped support member, the attachment/detachment part can be easily attached to the attachment part of the machine tool by hanging it from above without using any tools. By lowering the workpiece receiver using the variable mechanism, it can be easily removed without interfering with the workpiece.

FIG. 2 is a side view showing a workpiece holding section of a machine tool using a tailstock. FIG. 2 is a side view showing a workpiece holding section of a machine tool using a tailstock. It is a front view of the detachable plate shown from the axial direction of the support member. FIG. 3 is a cross-sectional view showing a workpiece receiving member provided at the tip of the supporting member. FIG. 3 is a front view of the workpiece receiving member as viewed from the axial direction of the supporting member. It is a front view showing a guide block.

An embodiment of the removable work temporary holder according to the present invention will be described below with reference to the drawings. For example, a machine tool such as a lathe performs turning processing by applying a cutting tool to a rotated workpiece. Such a machine tool has a headstock provided on a base, and a workpiece is rotatably held by a spindle chuck. At that time, if the workpiece is in the shape of a disk that is short in the direction of the rotation axis, it is sufficient to grip it with the spindle chuck, but if the workpiece is a rod that is long in the direction of the rotation axis, it is not enough to clamp the workpiece with the spindle chuck alone. I can't maintain my posture. Therefore, a tailstock is used to support the workpiece from the opposite side of the spindle chuck.

FIGS. 1 and 2 are side views of a workpiece holding section of a machine tool using a tailstock, and each shows a removable workpiece holding part of this embodiment with a changed form. The machine tool is provided with a tailstock 1 facing the main spindle, and a center 4 attached to the center of the spindle chuck 3 and a center 2 of the tailstock 1 are located coaxially with the rotation axis of the main spindle. are doing. Therefore, during cutting, the workpiece W is supported so as to be sandwiched between the two centers 2 and 4.

By the way, a temporary workpiece holder is used to attach the workpiece W using the tailstock 1. This is to maintain the workpiece W horizontally until the center 2 of the tailstock 1 is brought into contact with the leading end of the workpiece W. The removable temporary workpiece support (hereinafter simply referred to as "workplace temporary support") 5 of the present embodiment is L-shaped and removable from the vertical wall surface 101 on the tailstock 1 side. In particular, the machine tool has a mounting section on the wall surface 101, and the workpiece temporary holder 5 can be attached to and detached therefrom without using any tools.

A fixed plate 102 for removing and removing a thick plate, which is provided with a fulcrum pin 103, is fixed to the attachment part of the machine tool. Specifically, a tap is cut in the wall surface 101, and the detachable fixing plate 102 is fixed by tightening a bolt into the screw hole. The temporary workpiece support 5 has a support member 11 extending in the horizontal direction perpendicular to the wall surface 101, and a workpiece support member 12 vertically attached to the support member 11.

The support member 11 is a cylindrical bar, and a detachable plate 21 is joined to one end thereof. FIG. 3 is a front view of the detachable plate 21 seen from the axial direction of the support member 11. The detachable plate 21 has a hook hole 211 formed therein so that it can be hooked onto the fulcrum pin 103. The hooking hole 211 is shaped like a droplet, with the lower side being larger than the head 103a of the fulcrum pin 103, and the width decreasing toward the upper side. Therefore, the temporary workpiece support 5 is hooked on the fulcrum pin 103 that has entered the hook hole 211, and the detachable plate 21 receives a moment from the support pin 103 and the wall surface 101, as shown in FIGS. 1 and 2. Can be mounted in a cantilevered state.

Next, FIG. 4 is a cross-sectional view showing the workpiece receiving member 12 provided at the tip of the supporting member 11, and FIG. 5 is a front view of the workpiece receiving member 12 shown from the axial direction of the supporting member 11. be. In the workpiece receiving member 12, a first plate 23 and a second plate 24 each having an elongated shape are vertically connected. The upper second plate 24 has a V-shaped work receiving portion 241 formed at its upper end to receive the work W, and is connected to the first plate 23 at its lower end. A groove 242 is formed along the longitudinal direction on the lower back surface of the second plate 24, and two long holes 243 are formed overlapping the groove 242.

On the other hand, the first plate 23 is formed with an upper part 231 that can be fitted into the groove 242, and a screw hole is formed therein to correspond to the elongated hole 243. The first plate 23 and the second plate 24 are fixed together by tightening the hexagon socket head bolt 25 passed through the elongated hole 243 into the screw hole through the washer, and by loosening the tightening, the first plate 23 is fixed to the first plate 23. On the other hand, it is possible to adjust the position by shifting the second plate 24 in the direction along the groove 242, that is, in the longitudinal direction of the elongated hole 243.

A holding convex portion 26 is joined to the first plate 23 so as to protrude from the front side thereof. A tap is cut in the holding convex portion 26, and an adjustment bolt 27 is screwed into the holding convex portion 26 so as to penetrate from below. Further, a nut 28 is screwed onto the adjustment bolt 27, and by tightening the nut 28 which is pressed against the lower surface of the holding projection 26, the adjustment bolt 27 is positioned with respect to the holding projection 26. .

A receiving side convex portion 244 protruding forward is formed at the lower end of the second plate 24, and the tip of the adjustment bolt 27 protruding upward from the holding convex portion 26 is abutted from below. Therefore, by adjusting the protrusion amount of the adjusting bolt 27 that protrudes upward from the holding convex portion 26, the position of the receiving side convex portion 244 applied to the tip can be shifted, and the workpiece of the second plate 24 can be moved. Subtle positional adjustment of the receiving portion 241 is possible.

The first plate 23 has a shape that includes an upper part 231 that matches the width of the groove 242, an intermediate part 232 that has a larger width, and a lower part 233 that has a smaller width. The upper part 231 of the first plate 23 corresponds to the groove 242 of the second plate 24, and the position of the first plate 23 in the longitudinal direction can be adjusted as described above. In addition, the temporary workpiece support 5 allows the position of the workpiece support member 12 to be moved up and down with respect to the support member 11, as shown in FIGS. 1 and 2 (FIG. 5(a) and FIG. 5(b)). A variable mechanism is constructed.

A mounting plate 31 is joined to the tip of the support member 11, and a guide block 32 is fixed thereto with bolts 34. FIG. 6 is a front view showing the guide block 32. A guide groove 321 is formed on the back side of the guide block 32, and by overlapping the guide block 32 with the mounting plate 31, a through hole with a rectangular cross section is formed in which the intermediate portion 232 of the first plate 23 can slide in the vertical direction. Further, the guide block 32 is formed with a long hole 322 through which a bolt 34 for fixing to the mounting plate 31 is inserted. The elongated hole 322 is long in the lateral direction, and allows the position of the workpiece receiving member 12 to be adjusted in the lateral direction with respect to the support member 11. Furthermore, a screw hole 323 for attaching the stopper 33 is formed so as to overlap the range of the guide groove 321.

By sliding the workpiece receiving member 12 in the vertical direction, the workpiece temporary holding member 5 can be moved to the elevated temporary holding position shown in FIG. 1 (FIG. 5(a)) and the lowered retracted position shown in FIG. 2 (FIG. 5(b)). It is now possible to change the form. Therefore, in order to maintain the temporarily received state of the workpiece receiving member 12, two stoppers 33 are attached to the guide block 32. The stopper 33 is an index plunger, and is provided at two locations corresponding to the width dimension of the lower portion 233 of the first plate 23, and is configured such that a pin hits the lower end of the intermediate portion 232. Therefore, by pulling the knob of the stopper 33 toward you, the pin is removed from the intermediate portion 232, and the first plate 23 is lowered from the temporary receiving position to the retracted position.

The workpiece receiving member 12 is stopped from descending at a predetermined position by the adjustment bolt 27 hitting the guide block 32. The position where the adjustment bolt 27 hits the guide block 32 is the retracted position of the workpiece receiving member 12. A retaining bolt 35 is screwed into a screw hole formed in the lower part 233 of the first plate 23 so that the slidable workpiece receiving member 12 does not fall off the guide block 32 even if the top and bottom are reversed. .

Subsequently, the temporary workpiece holder 5 of this embodiment is used in the following manner. First, one end of the workpiece W is fitted into the center 4 on the spindle chuck 3 side, and the other end of the workpiece W is supported from below by the workpiece temporary support 5 attached to the wall surface 101 to maintain a horizontal posture. When the center 2 of the tailstock 1 is pushed out, the workpiece W is rotatably supported from both ends as shown in FIG. The temporary workpiece support 5 is removed before the workpiece W, which is supported between the centers 2 and 4, is cut. By lowering the workpiece receiving member 12 to the retracted position as shown in FIG. 2, interference with the workpiece W during machining can be avoided, but problems such as long chips becoming entangled may occur.

Since the workpiece temporary holder 5 is attached to and detached from the machine tool, it needs to be easy to handle. In this respect, the work temporary holder 5 can be attached and detached without using any tools. First, when mounting the temporary workpiece holder 5, the fulcrum pin 103 of the fixing plate 102 for detachment is inserted into the hook hole 211, and the head 103a is inserted as shown by the arrow in FIG. Due to the relative movement, the detachable plate 21 is hooked onto the fulcrum pin 103 from above. At this time, in the work temporary support 5, the support member 11 extends in the horizontal direction, and the work support member 12 is pushed upward at the tip thereof as shown in FIG. 1 (FIG. 5(a)).

The mounted workpiece receiving member 12 is supported by the pin of the stopper 33 and is in a temporary receiving state in which it can support the workpiece W. Fine adjustment of the work receiving portion 241 is then performed using the adjustment bolt 27. At this time, with the bolt 25 loosened, the adjustment bolt 27 is tightened into the screw hole of the holding convex part 26, so that the tip of the rod rises, and the second plate 24 is pushed up via the receiving convex part 244. The position is adjusted within the range of the long hole 243.

On the other hand, when removing the temporary workpiece holder 5, since the workpiece W is already set between the spindle chuck 3 and the tailstock 1, if the workpiece W is left in the state shown in FIG. cannot be removed by lifting it upwards. Therefore, in order to enable removal of the temporary workpiece support 5, the workpiece support member 12 is lowered to the retracted position shown in FIG. 2 (FIG. 5(b)). For this deformation, the knob of the stopper 33, which is an index plunger, is pulled toward the front. Then, the first plate 23 that has come off the pin moves down inside the guide block 32, and the adjustment bolt 27 abuts against the guide block 32 and stops. Since the temporary workpiece holder 5 no longer interferes with the workpiece W, it is lifted upward, the detachable plate 21 is removed from the fulcrum pin 103, and the temporary workpiece holder 5 is removed from the processing location of the workpiece W.

Therefore, the temporary workpiece holder 5 of this embodiment can be attached by simply hooking the detachable plate 21 onto the fulcrum pin 103, and can be attached to and detached from the machine tool without using tools. This makes the pre-processing work very simple. Further, when removing the temporary workpiece support 5, the workpiece support member 12 can be lowered to the retracted position simply by pulling the knob of the stopper 33 toward the front. On the other hand, in the workpiece receiving member 12 at the temporary receiving position, the workpiece receiving portion 241 can be finely adjusted by the adjustment bolt 27, so that the workpiece W can be supported at an appropriate position.

Although one embodiment of the present invention has been described above, the present invention is not limited to this, and various changes can be made without departing from the spirit thereof.

1...Tailstock 2, 4...Center 3...Spindle chuck 5...Detachable workpiece temporary holder 11...Support member 12...Workpiece holder 21...Detachable plate 23...First plate 24...Second plate 27...Adjustment bolt 31... Mounting plate 32... Guide block 33... Stopper 101... Wall surface 103... Fulcrum pin 211... Hook hole

Claims (2)

A removable part is formed at one end of the machine tool so as to be attached to the mounting part of the machine tool configured on a vertical surface so as to hang from above, and the horizontal orientation is maintained by attaching the removable part to the mounting part of the machine tool. a rod-shaped support member;
a workpiece receiving member provided at a distal end opposite to the attachment/detachment portion so as to be orthogonal to the support member, and having a variable mechanism for raising and lowering the position of the workpiece receiving portion that is applied to the workpiece from below;
The workpiece receiving member includes a guide member formed at the distal end of the support member, and an elongated workpiece receiving plate having a workpiece receiving portion formed at the distal end, and the variable mechanism is configured such that the workpiece receiving portion is connected to the workpiece. The workpiece receiving plate is assembled to the guide member so as to be moved downward a predetermined distance from the contacting temporary receiving position, and the guide member is provided with a stopper member for positioning the workpiece receiving plate at the temporary receiving position,
The guide member is a guide block that is fixed to the tip of the support member and forms a through hole with a rectangular cross section, and the workpiece receiving plate moves through the through hole of the guide member and is positioned by the stopper member. and a second plate assembled so as to be movable up and down with respect to the first plate, and an adjustment screw is screwed into a convex portion of the first plate, A removable temporary workpiece support having an adjustment mechanism in which the upper end of the adjustment screw is applied to a convex portion. The attachment/detachment part is a plate fixed to one end of the support member, and the upper width thereof is reduced to correspond to a pin member with a head that protrudes horizontally from the attachment part on the machine tool side. 2. The removable workpiece temporary holder according to claim 1, wherein a droplet-shaped hooking hole is formed.

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