JP2004025332A - Work positioning device for machine tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a work positioning device for a machine tool, which is easy to operate and has high working efficiency. <P>SOLUTION: This device comprises a fixed base 10, a strut 20 raised on the fixed base, and an adjusting support member 30 connected to the strut through a clamp screw 50. A work contact bar 40 is slidably inserted to the end part of the adjusting support member, and elliptic clamp screw receiving holes for slidably inserting the clamp screw are formed in the strut and the adjusting support member. Accordingly, the strut and the adjusting member are integrally fixed when the clamp screw is rotated and fastened, and a prescribed space is formed between the strut and the adjusting member, when the screw is released, so that the strut and the adjusting support member are slidable by the length of the clamp screw receiving hole to the clamp screw. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a device for positioning a work in various machine tools, and more particularly to a device for positioning a work in a machine tool used when a work is fixed at a predetermined position in a milling machine, a machining center, or the like.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, when machining a work using a machine tool such as a milling machine or a machining center, it is necessary to position and attach the work according to the contents of the work. In machining by a machine tool, fixing a work at a predetermined position is the basis of processing, and a positioning device is used to fix the work at a predetermined position.
[0003]
Generally, a positioning device used in the past generally has an intermediate universal connector slidably mounted on a column fixed to a work table, and a supporting member for adjustment is slid on the universal column so as to be orthogonal to the column. The adjusting support member is provided with a work contact bar at the tip thereof. An example of such a work positioning device will be described with reference to FIGS. 8 and 9. The positioning device 1 is composed of a support column 2, an adjusting support member 3, an intermediate free connector 4, and a work contact bar 5. I have.
[0004]
The column 2 has a columnar shape, and is provided with a screw 2a at each end for screwing and fixing to a screw hole provided in the work table. The adjusting support member 3 has a columnar shape like the support column 2, and has a through hole 3 a through which the work contact bar 5 is inserted at one end. A slit 3b reaching the through hole 3a is provided on an end face of the adjusting support member 3, and the slit 3b is tightened by a tightening bolt 3c.
[0005]
On the other hand, the intermediate connecting member 4 has a rectangular column shape, and a through hole 4a through which the support member 3 for adjustment is inserted is provided at an upper portion, and a through hole 4b through which the support column 2 is inserted is formed at the lower portion. It is provided in a direction orthogonal to 4a. Slits 4c and 4d reaching the through hole 4a and the through hole 4b are provided on both end surfaces of the intermediate universal connecting member 4, respectively. Further, bolts 4e and 4f for fastening the slits 4c and 4d are attached.
[0006]
As shown in FIG. 9, the positioning device 1 according to the above configuration is fixed by screwing one screw 2 a of the support column 2 to a work table 7 fixed to a table 6. In order to use the positioning device 1, first, the work A is held between the fixed base 8 fixed to the work table 7 and the moving base 9 moved by a not-shown push screw.
[0007]
Next, the bolts 4e and 4f are loosened so that the adjusting support member 3 and the intermediate universal connecting member 4 can slide. The intermediate free connector 4 is slid in the X-axis direction along the column 2 to separate it from the work A to an appropriate position, and the projecting length of the adjusting support member 3 is applied to the work A by the work contact bar 5. Adjust in the Y-axis direction to make contact. In addition, the intermediate free connector 4 is rotated to adjust the height position in the Z direction so that the work contact bar 5 contacts the work A. While performing these adjustments, the bolts 4e and 4f are tightened and fixed. Finally, the bolt 3c is loosened and the workpiece contact bar 5 is abutted against the workpiece A to position the workpiece.
[0008]
[Problems to be solved by the invention]
In the conventional positioning device 1, the adjustment in the X-axis direction, the Y-axis direction, and the Z-axis direction is performed by loosening the bolts 4e and 4f to slide or rotate the adjusting support member 3 and the intermediate universal connecting member 4. You have to do it, you have to do very complicated movements. In addition, when the bolts 4e and 4f are tightened, if the order is incorrect, it may be necessary to start over. When the work is taken out, the adjusting support member 3 and the work contact bar 5 are in the way, so that the work must be moved in the Z-axis direction to open the work. However, this also requires the bolt 4f to be loosened. However, there is a problem that it takes time and effort.
[0009]
Further, the operation of the positioning device 1 requires that tools such as an elbow wrench and a spanner be placed close to the user, and there is a problem that it takes time to manage and take out these tools. These adjustments have to be performed every time the position of the work is changed or the work is replaced, and a large proportion of the time of the entire work is tightened, which is a factor that reduces work efficiency. .
[0010]
The present invention has been made in view of such a situation, and provides a device for positioning a workpiece in a machine tool, which is easy to operate, can perform positioning in a short time, and can improve the efficiency of the machining operation. Aim.
[0011]
[Means for Solving the Problems]
As a means for solving such a problem, a work positioning device in a machine tool according to the present invention includes a fixed base, a support erected on the fixed support, and an adjustment connected to the support by a clamp screw. And a support material for use. A work contact bar is slidably inserted through an end of the adjusting support member, and an oval clamp screw receiving hole through which the clamp screw is inserted and slid through the support post and the adjusting support member. When the clamp screw is turned and tightened, the support and the support for adjustment are fixed integrally, and when loosened, a predetermined gap is formed between the support and the support for adjustment, and the support and the support for adjustment are formed. The adjusting support member is characterized in that it can slide with respect to the clamp screw by the length of the clamp screw receiving hole.
[0012]
A configuration in which a clamp screw is slidably inserted into the support and the support member for adjustment is provided by forming a concave portion larger than a clamp screw receiving hole on opposite side surfaces of the support, and a through hole through which the clamp screw is inserted in the concave portion. A clamp screw receiving plate formed with a slidable fitting is provided.On the other hand, a concave portion larger than a clamp screw receiving hole is provided on a side of the adjusting support member facing the support, and a clamp screw is provided in the concave portion. A clamp screw receiving plate having a through hole to be inserted is slidably fitted. Then, the support post and the adjusting support member are screwed with a moving nut at the tip of the clamp screw, and when the clamp screw is tightened, a fixed gap is provided between the moving nut and the lock nut to secure the lock nut. Then, by attaching a pressing spring to the clamp screw so as to press the moving nut, when the clamp screw is rotated and tightened, the supporting column and the adjusting support member are fixed integrally, and when loosened, the moving nut and the adjusting nut are fixed. It is possible to form a gap between the support and the adjusting support member by an amount corresponding to the gap between the lock nut.
A step for locking a washer is formed on the inner surface of the clamp screw receiving hole of the support, and a step for locking the head of the moving nut is formed on the inner surface of the clamp screw receiving hole of the adjusting support. Is preferably pressed by a pressing spring via a spring receiving ring, so that when the clamp screw is loosened, a space between the support and the adjusting support member is formed.
[0013]
Further, it is preferable that an opening surface on the opposite side to a side surface of the adjustment support member facing the support of the clamp screw receiving hole is closed by a lid plate. The work contact bar is slidably inserted in the same direction as the clamp screw. Preferably, the clamp screw is rotated by a handle such as a lever.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a work positioning device in a machine tool according to the present invention will be described with reference to the drawings. In the drawings to be referred to, FIG. 1 is an exploded perspective view, FIG. 2 is a sectional view of an assembled state, and FIG. A work positioning device in a machine tool according to one embodiment includes a fixed base 10, a column 20 having a rectangular cross section, a support member 30 having a rectangular cross section, and a work contact bar 40. The support column 20 is erected at the end of the fixed base 10, the adjustment support member 30 is attached to the side surface of the support column 20 so as to be rotatable and vertically movable, and the work contact bar 40 is adjusted. Is slidably inserted into an insertion hole provided in the support member 30 for use.
[0015]
More specifically, the fixing base 10 is provided with a long hole 10a for fixing to the work table, and one end is provided with a step 10b on which the column 20 is placed. Is provided with a bolt insertion hole 10c. A fixing bolt is inserted into the elongated hole 10a and fixed to the work table, and the bolt 11 inserted through the bolt insertion hole 10c is screwed into the bottom of the column 20 placed on the step portion 10b, thereby integrally with the column 20. Assembled.
[0016]
As shown in FIG. 1, the column 20 has a rectangular shape in a horizontal cross section, and has concave portions 20a, 20a formed on substantially both sides facing each other, and a clamp screw is formed substantially at the center of the concave portions 20a, 20a. An oval through hole 20b for insertion is formed. A step portion 20d for locking a washer is formed on the inner surface of the oblong through hole 20b. A bolt hole 20 c for screwing the bolt 11 is formed in the bottom surface of the support 20.
[0017]
Further, the support column 20 is provided with sliding plates 21 and 22 that fit into and slide into recesses 20a and 20a provided on both side surfaces. The sliding plate 21 is provided with a shaft hole 21a, the sliding plate 22 is provided with a ring hole 22a into which a spring receiving ring described later is inserted, and a stepped portion of the oval through hole 20b. Is provided with a washer 23 and a pressing spring 24 through which a clamp lever shaft to be described later is inserted.
[0018]
Next, as shown in FIG. 1, the adjustment support member 30 has a rectangular shape in a horizontal cross section, and has a step portion 30 a on one side surface and a step portion 30 b on the opposite side surface. . An oblong through hole 30c is formed to penetrate from the step portion 30a to the step portion 30b side and to insert a spring receiving ring described later. A step portion 30g for locking the head of the spring receiving ring is formed on the inner surface of the oval through hole 30c.
[0019]
Also, on both surfaces of the adjusting support member 30, a sliding plate 31 fitted to the step portion 30a and shorter than the step portion 30a, and a sliding plate 31 fitted to the step portion 30b and having substantially the same size as the step portion 30b are provided. A cover plate 32 is provided. The sliding plate 31 is provided with a ring hole 31a into which a small diameter portion of a spring receiving ring described later is inserted.
[0020]
A bar insertion hole 30d through which the workpiece contact bar 40 is inserted is provided on the upper side surface of the adjusting support member 30, and a plunger cylinder insertion hole 30e which is connected to the bar insertion hole 30d is provided on the upper surface. ing. A base 34 is fitted into the opening of the bar insertion hole 30d such that the tip surface slightly projects into the plunger cylinder insertion hole 30e.
[0021]
Into the plunger cylinder insertion hole 30e, a plunger cylinder 33 having a curved lower end surface is inserted while a female screw is formed on the inner surface to make the opposing surface of the lower end outer surface a flat surface. A ball plunger 35 having a ball at its tip is mounted on the plunger cylinder 33, and is integrally formed with a hollow screw 35a. A clamp lever fixing nut 36 is attached to the opening of the plunger cylinder insertion hole 30e.
[0022]
Further, there is provided a clamp lever shaft 37 which is screwed to the clamp lever fixing nut 36 and a tip end of which is in contact with a hollow screw 35a for fixing the ball plunger 35. The lever 38 is attached. The clamp lever 38 engages a male tooth form 37a formed on the outer peripheral surface of the distal end portion of the clamp lever shaft 37 with a female tooth form formed on the shaft part 38a of the clamp lever 38, and screws a screw 38c via a spring 38b. It is attached integrally by screwing it into the screw hole 37b of 37.
[0023]
The work contact bar 40 is a rod-shaped body having an appropriate length, and has a groove 40a formed in the outer surface in the axial direction. The work contact bar 40 is securely fixed by the lower surface of the plunger cylinder 33 by rotating and clamping the clamp lever 38. When the clamp lever 38 is rotated and loosened, the work contact bar 40 can slide freely through the bar insertion hole 30d. Even when the clamp lever 38 is rotated to loosen and the work contact bar 40 is slidable, the ball at the tip of the ball plunger 35 is in contact with the work contact bar 40, so that it is lightly pressed. It does not fall out carelessly.
[0024]
The support column 20 and the support member 30 for adjustment are integrally assembled by a clamp screw 50. The clamp screw 50 has a male screw 50a and a tooth profile 50b formed on an outer peripheral surface, and a screw hole 50c is provided on an end surface. A clamp lever 51 is attached to the clamp screw 50. The clamp lever 51 is integrally mounted by engaging a female tooth profile formed on a shaft portion with a tooth profile 50b of a clamp screw, and screwing a screw 53 into a screw hole 50c of the clamp screw 50 via a spring 52.
[0025]
The moving nut 54 and the lock nut 55 are screwed into the distal end of the clamp screw 50 to assemble the support 20 and the adjusting support 30 integrally. The spring receiving ring 56 is stepped so that the distal end of the moving nut 54 is inserted into the through hole of the spring receiving ring 56, and is inserted into the ring hole 22 a of the sliding plate 22 and the ring hole 31 a of the sliding plate 31. It is configured in a shape. That is, the outer peripheral surface of the spring receiving ring 56 is formed in a two-stage shape of a large diameter portion 56a inserted into the ring hole 22a of the sliding plate 22 and a small diameter portion 56b inserted into the ring hole 31a of the sliding plate 31. Have been.
[0026]
Next, the positioning device having the above configuration is assembled, for example, as follows. First, the clamp screw 50 is inserted into the shaft of the clamp lever, the spring 52 and the screw 53 are inserted into the hole of the shaft of the clamp lever, and the screw 53 is screwed into the screw hole 50c to be integrated. Next, the sliding plate 21, the support 20, the washer 23, the pressing spring 24, the sliding plate 22, the spring receiving ring 56, the sliding plate 31, and the adjusting support 30 are inserted into the clamp screw 50 in this order. 21 and 22 are fitted into the recesses 20a and 20a, and the moving nut 54 is screwed into the clamp screw 50 and tightened.
[0027]
By tightening the moving nut 54, the support column 20 and the adjusting material 30 are tightly fixed. By tightening the moving nut 54, the spring receiving ring 56 is pressed by the pressing spring 24 from the opposite side, so that the distal end of the spring receiving ring 56 comes into contact with the ring hole 22a of the sliding plate 22 and the ring of the sliding plate 31. It is inserted into the hole 31a. Next, the lock nut 55 is screwed and fixed to the tip of the clamp screw 50.
[0028]
At this time, a predetermined interval T is provided between the moving nut 54 and the lock nut 55 as shown in FIG. This interval T is a gap that separates the support column 20 and the adjusting support member 30 when the two are operated, and the interval T can be 0.1 to 2 mm. After the lock nut 55 is fixed to the clamp screw 50, the lid 32 is fitted and fixed to the step 30b of the support member 30 for adjustment.
[0029]
Next, the plunger cylinder 33 is inserted into the plunger cylinder insertion hole 30e of the support member 30 for adjustment. The plunger cylinder 33 is prevented from rotating by the fact that a flat portion formed on the outer surface facing the lower end portion is inserted into the distal end surface of the base 34. The upper part of the clamp lever shaft 37 is inserted into the shaft portion of the clamp lever 38, and is fixed integrally by a spring 38b and a screw 38c. Thereafter, the screw portion of the clamp lever shaft 37 is screwed into the clamp lever fixing nut 36 previously attached to the opening of the plunger cylinder insertion hole 30e, and the distal end portion of the clamp lever shaft 37 is brought into contact with the hollow screw 35a.
[0030]
Finally, the work contact bar 40 is inserted through the base 34 and the bar insertion hole 30d, the bottom of the support 20 is placed on the step 10b of the fixing base 10, and the bolt inserted through the bolt insertion hole 10c at the bottom of the support 20 is used. 11 are assembled together by screwing.
[0031]
Next, a method of using the positioning device having the above configuration will be described. 4 is a plan view showing a state in which the positioning device is mounted on a milling machine, FIG. 5 is a side view of the same, and FIG. 6 is a perspective view. The fixing base 10 is placed on the table 60, and a bolt 61 is screwed into the groove 62 from the long hole 10a and fixed. The position at which the positioning device is fixed may be fixed by examining the approximate position where the work contact bar 40 contacts the work.
[0032]
To operate the positioning device, holding the clamp lever 51 and rotating the clamp screw 50 in the loosening direction causes the moving nut 54 to move in the direction of the lock nut 55 and abut on the lock nut 55 to stop. The space between the column 20 and the support member 30 for adjustment is separated by the movement of the moving nut 54, that is, by the dimension of the gap T between the moving nut 54 and the lock nut 55 (see FIG. 2). Even if the support 20 and the adjustment support 30 are released, the clamp screw 50 is held by the support 20 by the pressing force of the pressing spring 24, and the adjustment support 30 is also held by the pressing spring 24 via the spring receiving ring 56. Is held integrally by the clamp screw 50.
[0033]
When the support column 20 and the adjusting support member 30 are separated, the two are in a free state, and the sliding plates 21 and 22 that are only held by the pressing force of the pressing spring 24 are also in the concave portion 20a. Can be slid. Accordingly, when the adjusting support member 30 is pushed up or down, the sliding plates 21 and 22 move up and down while sliding in the concave portions 20a and 20a.
[0034]
At this time, the range of elevation of the support member 30 for adjustment is the length dimension of the oblong hole 20b of the column 20 to which the clamp screw 50 can be moved up and down. Further, since the adjustment support member 30 is only held by the clamp screw 50 by the pressing force of the pressing spring 24, the adjustment support member 30 is rotated around the clamp screw 50 and the adjustment support member 30 is attached to the clamp screw 50. By sliding the work contact bar 40, the height position of the work contact bar 40 can be adjusted.
[0035]
In this manner, by simply turning and loosening the clamp lever 51, the height position of the clamp screw 50 holding the adjustment support member 30 is adjusted, and at the same time, the adjustment support member 30 is rotated and / or adjusted. By simply sliding the support member 30 for the clamp screw 50, the contact position of the workpiece contact bar 40 with the workpiece can be easily determined. After that, if the clamp lever 51 is rotated and tightened, the support column 20 and the support member 30 for adjustment are integrally and closely fixed.
[0036]
FIG. 7 shows a movable range of the work contact bar 40. As is apparent from the figure, the work contact bar 40 is moved in the X-axis direction by loosening the clamp lever 51 to move the clamp screw 50 up and down, and by sliding the adjusting support member 30 with respect to the clamp screw 50. , Y-axis direction and Z-axis direction.
[0037]
When the support member 30 for adjustment is closely fixed to the column 20, a predetermined interval T is provided between the moving nut 54 and the lock nut 55. The distance T between the moving nut 54 and the lock nut 55 may be any distance that does not cause friction with the column 20 when the support member 30 for adjustment is slid. Will be regulated.
[0038]
Next, after the clamp lever 38 is loosened to allow the work contact bar 40 to be slidable, the work contact bar 40 is brought into contact with the side surface of the work, and the clamp lever 38 is again rotated and fastened and fixed.
[0039]
The above embodiment is an example of the present invention, and is not limited to the illustrated embodiment. For example, the clamp lever shaft 37 and the clamp lever 38 may be integrally formed in advance. In order to rotate the clamp lever shaft 37, another handle may be used without using the clamp lever. Is also good. In order to fix the work contact bar, any known means such as pressing and fixing with a spring can be used. The relationship between the clamp screw 50 and the clamp lever 51 is the same as the relationship between the clamp lever shaft 37 and the clamp lever 38.
[0040]
【The invention's effect】
As described above, in the workpiece positioning device for a machine tool according to the present invention, the column and the adjusting support member can be released and fixed only by rotating the clamp lever. Therefore, there is no need to use other tools, and management of tools is not required. In addition, when the support for adjustment is moved up and down with respect to the column, the adjustment in the Z-axis direction becomes possible. In addition, the support for adjustment is slid with respect to the clamp screw, and at the same time, only the inclination angle is changed to change the Y-axis And adjustment in the Z-axis direction. That is, adjustment in the Y-axis direction and the Z-axis direction can be performed simultaneously.
[0041]
Further, the clamp screw does not slide down even when the hand is released by the pressing spring disposed in the support, and the adjusting support member can be easily operated. In addition, when the support and the support for adjustment are released, a predetermined distance is maintained and friction does not occur between the two, so that not only the operation is smooth but also the durability is excellent. . In addition, since the clamp screw for connecting the support and the support member for adjustment is held in a sealed state, it can be easily operated without cutting chips.
By simply turning the lever back and forth (left and right), adjustment in the Y-axis direction and Z-axis direction can be performed simultaneously, and positioning can be adjusted in a very short operation time, resulting in improved work efficiency and productivity. Can be improved.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a part of a work positioning device in a machine tool according to an embodiment.
FIG. 2 is an assembly view in which a part is sectioned.
FIG. 3 is an enlarged view of a main part of the assembly.
FIG. 4 is an explanatory plan view showing a use state.
FIG. 5 is a side view of the same.
FIG. 6 is a perspective view of the same.
FIG. 7 is an explanatory side view of a positioning device showing a moving range of a work contact bar.
FIG. 8 is a perspective view showing an example of a conventional positioning device.
FIG. 9 is a perspective view showing a method of using the conventional positioning device.
[Explanation of symbols]
10: fixed base 10a: elongated hole 10b: stepped portion 10c: bolt insertion hole 11: bolt 20: support column 20a: concave portion 20b: oval through hole 20c: bolt hole 21, 22: sliding plate 22a: ring hole 23: washer 24: pressing spring 30: support members 30a, 30b for adjustment: step 30c: long hole 30d: bar insertion hole 30e: plunger cylinder insertion hole 30g: long hole 31: sliding plate 31a: ring hole 32: cover plate 33 : Plunger cylinder 34: Base 35: Ball plunger 35a: Engraved screw 36: Clamp lever fixing nut 37: Clamp lever shaft 37a: Male tooth shape 37b: Screw hole 38: Clamp lever 38a: Clamp lever shaft 38b: Spring 38c: Screw 40: Work contact bar 40: Groove 50: Clamp screw 50a: Male screw 50b: Tooth profile 50c: Screw hole 51: Clamp lever 2: Spring 53: screw 54: traveling nut 55: lock nut 56: the spring receiving ring

Claims (7)

A fixed base, a support standing upright on the fixed base, and an adjustment support connected to the support by a clamp screw, and a work contact bar slides on an end of the adjustment support. An oblong clamp screw receiving hole through which the clamp screw is inserted and slid is formed in the support and the supporting member for adjustment, and the support is adjusted with the support by rotating and tightening the clamp screw. When the support is loosened, a predetermined distance is formed between the support and the adjustment support, and the support and the adjustment support are fixed to the length of the clamp screw receiving hole with respect to the clamp screw. A work positioning device for a machine tool, characterized in that it can only slide. A concave portion larger than the clamp screw receiving hole is provided on both opposing side surfaces of the column, and a clamp screw receiving plate having a through hole through which the clamp screw is inserted is slidably fitted in the concave portion, A concave portion larger than the clamp screw receiving hole is provided on the side of the adjusting support member facing the support, and a clamp screw receiving plate having a through hole through which a clamp screw is inserted in the concave portion is slidably fitted. The support and the support member for adjustment, a moving nut is screwed into the tip of the clamp screw, and when the clamp screw is tightened, a lock gap is provided with a fixed gap between the moving nut and the lock nut. By attaching a pressing spring to the clamp screw so as to press the moving nut, when the clamp screw is rotated and tightened, the support and the adjusting support member are fixed together, and when loosened, the moving nut and the adjusting nut are fixed. By a gap amount between Kkunatto, positioning device of a work in a machine tool according to claim 1, characterized in that so as to form a gap between the strut and the adjustment support. A step for locking the washer is formed on the inner surface of the clamp screw receiving hole of the column, and a step for locking the head of the moving nut is formed on the inner surface of the clamp screw receiving hole of the adjusting support. The apparatus according to claim 1 or 2, wherein the moving nut is formed and is pressed by a pressing spring via a spring receiving ring. The work in the machine tool according to any one of claims 1 to 3, wherein an opening surface of the adjustment support member on the side opposite to the support side of the clamp screw receiving hole is closed by a cover plate. Positioning device. The opening surface of the adjustment support member opposite to the support side of the clamp screw receiving hole is closed by a lid plate, and the work contact bar is slidably inserted in the same direction as the clamp screw. The device for positioning a workpiece in a machine tool according to any one of claims 1 to 3, wherein: The opening surface of the adjustment support member opposite to the column side of the clamp screw receiving hole is closed by a cover plate, and the clamp screw is rotated by a handle. 4. The device for positioning a workpiece in a machine tool according to any one of items 3. The opening surface of the support member for adjustment opposite to the support side of the clamp screw receiving hole is closed by a cover plate, and the work contact bar is slidably inserted in the same direction as the clamp screw, 4. The apparatus according to claim 1, wherein the clamp screw is rotated by a handle.

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