JP2722379B2 - Workpiece holder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a workpiece holder suitable for holding workpieces for processing various machine members with a machine tool.

[0002]

2. Description of the Related Art Conventionally, when various mechanical parts are processed by a machining center or the like, for example, a workpiece holder called a face plate fixed on a processing plate of the machining center has been used.

When a workpiece is placed on such a workpiece holder and a contour or the like is processed, the workpiece is placed on a face plate using a screw hole or the like formed in the workpiece. Was fixed.

The structure of the face plate of such a workpiece holder will be described in detail with reference to FIGS. As shown in FIGS. 4A to 4C, work holders 2A, 2B, and 2C called face plates are fixed on a work table of a machine tool, and processing is performed without changing the setup in the same process of processing the outer shape of a workpiece. It is carried out.

[0005] The conventional structure of the workpiece holder 2 (2A to 2C) described above is such that a T-shaped groove having a reverse T-shaped cross section passing through the center of the disk is formed in a disk-shaped steel material as shown in FIG. 4A. A T-shaped groove 9 is formed in a cross shape and has an inverted T-shaped cross section at a position bisected from the center of one T-shaped groove so as to be orthogonal to the T-shaped groove.
And 9 are formed, annealed after heat treatment, and surface grinding finish.

FIG. 4B shows another shape of the workpiece holder 2B. The workpiece holder 2B is formed in a substantially rectangular shape and a chamfered portion 10 is formed in a corner, and a rectangular short piece is formed. The T-shaped groove 8 having an inverted T-shaped cross section passing through the bisected position of the side and the long side and the T-shaped groove 8 passing through the bisected position of the short side are divided into six equal parts so as to be orthogonal to the groove 8. And a T-shaped groove 9 having an inverted T-shaped cross section. The material, finish and the like are the same as those in FIG. 4A.

FIG. 4C shows still another configuration of the conventional workpiece holder 2C. The workpiece holder 2C having this configuration is shown in FIG.
Is formed in a disk shape, and is formed with a T-shaped groove 8 having an inverted T-shaped cross section which divides the circumference into eight equal parts from the center of the disk.

FIG. 5 is a perspective view showing a case where the workpiece 4 is fixed on the workpiece holder 2C shown in FIG. 4C. After the workpiece holder 2C is fixed on the processing table 1 of the processing machine (not shown) for each step of processing the workpiece 4, for example, the inner shape or the outer shape, the workpiece holder 2C is processed. The T-type nut in the T-shaped groove 8 is moved in the radial direction through a bush or the like by using a hole 6 for a workpiece such as a through-hole for a bolt already formed in the object 4 so as to clamp the bolt. At 5, the workpiece 4 was fixed to the workpiece holder 2C.

Further, a workpiece holder as shown in FIGS. 6A and 6B is well known. The workpiece holder 2D shown in the plan view of FIG. 6A has a plurality of through holes 10 and tap holes 11 alternately formed in a grid pattern on a disk-shaped steel material such as FC250, and has a configuration shown in FIG. 6B. Has a rectangular shape, a plurality of through-holes 10 and tap holes 11 are alternately drilled in a lattice, and positions the workpiece holder 2E on a processing table 1 such as a machining center. Is set with a precision T nut, etc.
The workpiece 4 was attached to the workpiece holder 2E by screwing through a bush using a bolt hole or the like drilled in the workpiece in the same manner as described above.

[0010]

When the workpiece 4 is to be fixed on the workpiece holder 2 by the above-mentioned conventional various workpiece holders 2 (2A to 2E), for example, a die or a die is used. It is desirable that the mounting holes of the punches be designed at the same position in terms of the manufacture of the die. However, it is not always possible to design the mounting holes at the same position due to the shape of the punched work. In such a case, the workpiece holder 2 is provided with the mounting holes at equal intervals.
It is fixed according to the tap hole 11 or the translucent hole 10 formed in the hole, but if the pitch does not match, it is necessary to manufacture a dedicated work holder for the mold. Since there are usually many types of punches, dies, etc., there are also many types of dedicated workpiece holders and dedicated jigs, and the cost of manufacturing workpiece holders leads to an increase in die manufacturing costs, and In addition, there is a problem in that the lead time for manufacturing a mold is deteriorated due to the production of the dedicated workpiece holder.

Further, according to the workpiece holder 2 having a configuration as shown in FIGS. 4 and 5 in which a T-shaped groove having an inverted T-shaped cross section is formed on the workpiece holder. The position of the mounting hole formed in, for example, the mold of the workpiece is movable on the T-shaped groove 8 or 9, but the number of divided T-shaped grooves is limited. For example, in the configuration shown in FIG. The T-shaped groove 8 divides the circumference of the disk into eight equal parts, and there is a problem that a workpiece having a mounting hole position at an intermediate position cannot be mounted on the workpiece holder 2.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object thereof is to provide a through hole of a workpiece holder at an arbitrary position with respect to a mounting hole position of a workpiece. Is to provide a workpiece holder capable of moving the position of a tap hole.

[0013]

A workpiece holder according to the present invention is a workpiece holder provided on a processing plate of a workpiece apparatus for processing a workpiece. A plurality of first columnar members are rotatably pivotally attached to the substrate, and each of the first columnar members is rotatably pivoted to a position eccentric from a center position thereof. A plurality of screw holes or through holes are formed concentrically on the second columnar member, a workpiece is placed on the substrate, and a first columnar member and a second columnar member are mounted. Is adjusted so that the mounting hole formed in the workpiece matches the screw hole or the through hole of the second cylindrical member, and the workpiece is moved between the mounting hole and the screw hole or the through hole. It is characterized by being fixed.

[0014]

According to the workpiece holder of the present invention, the second cylindrical member is pivotally attached to the first cylindrical member at an eccentric position so as to be rotatable, and is concentric with the second cylindrical member. Since a plurality of types of screw holes or through-holes are formed, the screw holes or through-holes move the screw holes or through-holes of the second cylindrical member to an arbitrary position in order to planetary move around the outer periphery of the substrate. It can be mounted on the workpiece holder regardless of the position of the mounting hole drilled in the workpiece such as a mold.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the structure of a workpiece holder 2 of the present invention.
FIG. 2 will be described. 1A and 1B are a plan view and a cross-sectional view taken along the line AA of FIG. 1A of the workpiece holder of the present embodiment. FIGS. 2A and 2B show a workpiece placed on the workpiece holder of the present embodiment. It is the top view and side view which show the state which performed.

In FIG. 1A and FIG. 1B, the workpiece holder 2 has a substrate 13 made of a disk-shaped steel material or the like and a center at a predetermined concentric position passing through the center of the substrate 13 and dividing the circumference into four equal parts. 1 of the columnar members 15, 15, 15, 15
3 and is pivotally attached to it.

As shown in FIG. 1B, these four first columnar members 15 are formed into a large-diameter portion 16 having a lower diameter larger than an upper diameter, and are formed in the substrate 13. The stopper operates so as not to come out upward when loosely fitted into the stepped through hole 17 from below.

The bolt insertion hole 18 is formed in a radial direction at an angular position which divides a circumference passing through the center of the substrate 13 into eight equal parts, that is, an intermediate angular position where the first columnar members 15 and 15 are arranged. . In FIG. 1A, six bolt insertion holes 18 are formed in the radial direction. However, the number of these holes can be appropriately selected, and the number becomes a mounting hole for the machining table 1 of the machine tool.

A third cylindrical member 21 having a large-diameter portion 19 and a small-diameter portion 20 is rotatably loosely fitted into a stepped through hole 22 formed in the substrate 13 at a position eccentric from the center of the substrate 13 by a predetermined distance. And pivot.

The third columnar member 21 has a plurality of different types of tap screw holes 23 formed concentrically.

In each of the plurality of first cylindrical members 15, 15,..., A second cylindrical member 24, 24,. I do. The second cylindrical members 24, 24... Are also the first cylindrical members 15, 1.
5 is composed of a large-diameter portion 25 and a small-diameter portion 26,
Stepped through-holes 27 formed in the first cylindrical members 15, 15,...
Is loosely fitted from below, and is pivotally attached to the upper part so as to constitute an upward stopper.

Further, a plurality of various types of tap screw holes 28 are formed concentrically above the second columnar members 24, 24,.... These tapped screw holes 28, for example, _{M 4}
Screw holes of ~M ₁₂ is selected. Further, the disposition positions of the second cylindrical members 24, 24,...
It is possible to select such that the center of rotation comes to a half position of the radius of 15..., That is, 3/4 of the diameter. In this way, the tap screw holes 28 formed in the second cylindrical member 24 perform planetary motion by rotating the first and second cylindrical members 15 and 24, and the first cylindrical member 15, 1
5... Tap screw holes 2 of predetermined type on all upper surfaces
8 can be brought.

The third columnar member 21 is used for fixing a workpiece near the center of the disk-shaped substrate 13.

The workpiece 4 has, for example, a substantially disk-like shape on the workpiece holder 2 having the above-described configuration.
The rotation position of the second columnar member 24 and the predetermined tap screw hole 2 when the mounting holes drilled at positions A, B, C, and D
FIG. 2A is a plan view showing the relationship with the eight positions, and FIG. 2B is a partial cross-sectional view showing the state of attachment with the bolt 29.

That is, by rotating the first and second columnar members to predetermined positions, most of the workpieces 4 can be fixed to the workpiece holder 2 regardless of the positions of the mounting holes.

In the structure of the workpiece holder 2 described above, four first columnar members 15 are arranged at positions where the circumference of the substrate 13 is arranged at equal intervals, for example, 6 to 8 are arranged at equal positions. 6 to position
The first columnar member 15 may be rotatably pivoted eight times, or the outer periphery of the first columnar member 15 may be concentric with the inner side of the first columnar member 15.
At an intermediate angle (45 degrees) between the two angles (90 degrees)
An upper columnar member similar to the two first columnar members 15 may be provided.

3A and 3B show a workpiece holder 2 showing another configuration of the present invention. FIG. 3A is a plan view and FIG.
FIG. 3B is a sectional view taken along line BB of FIG. 3A. FIG.
1A and 1B in FIG. 3A and FIG. 3B, the same reference numerals are given and the duplicate description is omitted.
A is formed in a substantially square shape, and a 45 ° chamfer 10
In addition, bolt insertion holes 18 for fixing the workpiece holder 2 to the machining tables 1 of the sixteen machine tools 7 are formed in a lattice shape at positions where the left, right, upper and lower sides are approximately equally divided by four.
Further, nine first columnar members 15 are pivotally attached to the substrate 13A in a grid-like manner in a row and column direction at an intermediate position between the bolt insertion holes 18 and 18, and each of the plurality of first columnar members 15 is connected to the substrate 13A. A second columnar member 24 having a center at a half position of a radius with respect to the first columnar member 15 is pivotally connected to the first columnar member 15 so as to be rotatable. The two columnar members 15 and 24 have a large diameter portion and a small diameter portion as in FIGS. 1A and 1B.

Even with the workpiece holder 2 having such a configuration, similarly to the workpiece holder 2 shown in FIGS. 1 and 2, a workpiece holder that can be attached without being limited to the mounting hole position of the workpiece. Tools are obtained.

[0029]

According to the workpiece holder of the present invention, a screw hole or a through hole for fixing a workpiece can be aligned with any position of a bolt hole already formed in the workpiece. Therefore, any workpiece can be fixed, and there is no need to specially manufacture a dedicated workpiece holder for fixing the workpiece. Further, since there are a plurality of types of tap screw holes, it is possible to cope with various types of screws. Furthermore, since there is no time or cost for manufacturing a dedicated jig in processing a mold or a part, the lead time can be reduced at a low cost.

[Brief description of the drawings]

FIG. 1 is a plan view (FIG. 1A) showing an embodiment of a workpiece holder of the present invention, and a sectional view taken along the line AA of FIG. 1A (FIG. 1B).

FIG. 2 is a plan view (FIG. 2A) showing a state in which a workpiece is fixed to the workpiece holder shown in FIG. 1 of the present invention, and a side cross-sectional view (FIG. 2B) showing a part thereof as a cross section.

FIG. 3 is a plan view (FIG. 3A) showing another embodiment of the workpiece holder of the present invention and a sectional view taken along the line BB of FIG. 3A (FIG. 3B).
It is.

FIG. 4 is a plan view (FIGS. 4A to 4C) showing various configurations of a workpiece holder attached to various conventional machine tools.

FIG. 5 is a perspective view showing a state in which a workpiece is fixed to the workpiece holder shown in FIG. 4C.

FIG. 6 is a plan view showing the structure of still another conventional workpiece holder, in which FIG. 6A shows a disk-shaped substrate and FIG. 6B shows a square substrate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Processing plate 2, 2A-2E Workpiece holder (face plate) 4 Workpiece 7 Machine tool 13 Substrate 15 1st cylindrical member 24 2nd cylindrical member

Claims (3)

(57) [Claims] 1. A workpiece holder provided on a processing plate of a workpiece apparatus for processing a workpiece, wherein a plurality of first columnar members rotate on a substrate of the workpiece holder. A second columnar member is rotatably pivotally attached to each of the first columnar members at a position eccentric from a center position of the first columnar member, and is concentric with the second columnar member. Various types of screw holes or through holes are formed in a shape, the workpiece is placed on the substrate, the first cylindrical member and the second cylindrical member are rotationally adjusted, and the workpiece is bored in the workpiece. The mounting hole and the screw hole or through hole of the second cylindrical member,
A workpiece holder for fixing a workpiece between the mounting hole and the screw hole or the through hole. 2. The workpiece holder according to claim 1, wherein a step portion is provided at the bottom of the first and second columnar members so as to fit each other. 3. The workpiece holder according to claim 1, wherein the substrate has a circular or polygonal shape.