JPS60114433A - Work holder - Google Patents

Abstract

PURPOSE:To make it possible to control automatically the positions of a board and a base, by forming the mechanism such as that, on the fixed side board of one V-shaped receiving surface, the sliding side board of the other V-shaped receiving surface is set, at the determined angle. CONSTITUTION:A fixed side board 5, which includes one side surface 5a of a V-shaped surface, is set on a fixed base 3, as the height of the board 5 is adjustable, and a sliding side board 6, which includes the other side surface 5c of the V-shaped surface, is set on the board 5, as it can be adjusted according to the scale. At the same time, an end surface 6e, which is in the opposite side of a grindstone, is formed as it's angle is (alpha+90 deg.)/2 (alpha; an angle between a horizontal plane and the receiving surface), and a receiving base 4, which receives the surface set at an angle of (alpha+90 deg.)/2 degrees, is set. In this way, a work holder, not requiring adjustment thereon, can be obtained, because the relative positions of the receiving board and the fixed base are automatically adjusted, by adjusting the scale of the sliding side board 6 of the receiving surface.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD This invention relates to improvements in adjustable workholders for use in grinding machines.

Prior art As shown in Figs. 1 and 2, the conventional adjustable work holder adjusts the size of the seven surfaces according to the size when the workpiece diameter is changed, so one of the seven surfaces that receives the workpiece is It was necessary to align the scales between the sliding side plate that forms the surface and the fixed side plate that has the other of the seven surfaces on the top, and also to align the scale between the fixed side plate and the base in order to determine the height of the seven surfaces. .

For this reason, there is a drawback that adjustment is troublesome and time-consuming.

Purpose Therefore, the present invention has been made in view of the above, and by adjusting the scale of the plate on the sliding side of the face of the receiver, the positional relationship between the receiving plate and the fixed base is matched to the scale, and no adjustment is required. The aim is to provide a work holder that does this.

Solution: A fixed side plate having one of the seven sides is provided on a fixed base so that the height thereof can be adjusted, and a sliding side plate having the other side of the seven sides is provided with a cradle that can be adjusted with a scale on the said plate. It was established.

Example Embodiments of the present invention will be described below based on the drawings.

A base 3 having a guide surface 3a in the vertical direction is vertically fastened to a mounting base 2 fixed on a table 1 of a grinding machine, and a base 4 is fastened thereto. A workpiece W is received between the pedestal 4 and the base 3 so as to be slidable up and down along the guide surface 3a.
A fixed side plate 5 whose upper surface is a receiving surface 5a forming one of the surfaces.
is inserted into the base 3 through a vertical elongated hole 5 with a bolt.
It is fixed so that it can be adjusted within the range of a. The sliding side plate 6 forming the other of the seven surfaces for receiving the workpiece W is cut inclined parallel to one surface of the seven surfaces, and has a straight receiving surface 6a on the guide surface 5C, and is slidably fitted therein. It is adjustable and fastened to the stationary side plate 5 with bolts within the range of the elongated hole 6b in the sliding direction. A scale is engraved on the side surface to determine the amount of protrusion of the sliding side plate corresponding to the diameter of the workpiece, so that the position can be adjusted to match the base line of the fixed side plate 5. In addition, the grinding wheel side end surface 6d of the sliding side plate B is shaped and formed so as not to interfere with the grinding wheel and maintain the necessary rigidity to receive the workpiece W, but normally, when installed, it becomes a tangent between the workpiece and the grinding wheel. It is formed like this.

Furthermore, as shown in Fig. 3, the other end surface 6e of the sliding side plate O is protruded so that the receiving surface 6N of the sliding side plate O corresponds to the diameter of the workpiece, so that when receiving the workpiece, the support axis is on the same line. Since the fixed side plate 5 is moved up and down according to the diameter of the filter, the receiving surface 6a is moved in parallel.

Therefore, the angle of the end of the sliding side plate 6 opposite to the whetstone is turned to the surface 6a.
If the front end JK of is extended to the common tangent between the workpiece and the grindstone, then the receiving surface 6a of the sliding side plate 6, i.e. EF, moves in parallel to E'F', and B! F'IIF' 4E in an octagonal parallelogram
y II"=<AgaB. If <hoi=β, then υ"'B=α1β, then plane 0I11'2 and OM goto 9
0τ OE' is common.

Since OL=OM, hOLE'EbOM1M, ,'
, LOTfj'=bMOgo=β Also, MUONM and MUANO
Since <AON=90' in and, 40 M N
=9 []' Also, since ζONA is common, jOAN
=LMON=α,', <A OM+ζMON=2(AOE'-1-/
-MON=2β+α290° It is made into a trapezoid with an angle of 90−α. Since the angle of the upper end of the pedestal 4 is 9σ-β, that is, -7-. To change the state in which the work holder configured as described above receives a 20φ workpiece W from the state in which the receiving pedestal 4 is in contact with the lower end 6e of the sliding side plate 6 to a state where it can receive a 60φ workpiece W, The fixing bolts of the sliding side plate 6 are loosened, the scale 60 is aligned with the base line of the fixed side plate 5, the sliding side plate 6 is projected, and the bolts are tightened to fix the sliding side plate 6. Next, loosen the pole F that fixes the fixed side plate 5 to the base B and lower it, and the lower end surface 6et of the sliding side plate - the receiver is the receiving surface 4 of the base 4.
(a) When the work holder is brought into abutment and fixed with bolts, the work holder is ready to receive the workpiece concentrically. So 6o
When a workpiece W having a diameter of φ is supported at the center on the spindle side and the center on the tailstock side, the surfaces 5a and 6a of the workpiece holder contact the lower surface of the workpiece and support it without bending.

Effects As detailed above, the present invention has a V-shaped receiver with a fixed side plate that passes through one surface, and another V-shaped receiver with a lower end angle of a sliding side plate that is slidable in the direction of one surface. Since a cradle is provided on the end face of the plate, the position of the plate and base is automatically determined by simply adjusting the scales of the sliding side plate and the identification side plate, making adjustment work easier and reducing setup time. can do.

Furthermore, since the sliding side plate is fixed in contact with the cradle, there is no risk that the sliding side plate will move and the work holder will not be able to perform its full function even in the case of heavy workpieces. be.

[Brief explanation of the drawing]

1 and 2 are explanatory views of a conventional work holder, FIG. 3 is a front view of the work holder, FIG. 4 is a side view thereof, and FIG. 5 is an explanatory view of the lower end angle of the sliding side plate. 6...Base 4...Base is stand 5...Fixed side plate 6
...Sliding side plate W...Processed product patent applicant Okuma Renkosho Co., Ltd. (7) Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] (1) In a work holder that receives the workpiece from below on seven sides formed by two plates and can be adjusted according to the diameter of the workpiece, one of the plates is fixed so that it can be adjusted up and down. When the other plate is supported by the one plate so that its protruding length can be adjusted by a scale in the direction of the receiving surface, the receiving plate that receives the sharpening is attached to the fixed side stand. A work holder characterized by being fixed.