JPH1094981A - Punching jig for circular dividing pitch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily, promptly and efficiently perform centering of a work, an equal division and a circular pitch setting, exactly set a punching location and perform 2 positioning with high accuracy by which a marking line, etc., is not left on the surface of a product, by punch positioning punching working according to the size of the diameter of a worked product and the number of log. SOLUTION: This punching jig is made a punching jig for circular dividing pitch which is made to perform a punching for a work clamped by freely rotatably coupling a work side scroll body 1 which is made to be freely rotatably supported by a work side frame 14 and a punching side scroll body 2 which is made to be freely rotatably supported by a punch side frame 5 with each other, clamping and holding the work by a work clamp pawl 71 formed integrally wirh a jaw 6 for work clamp which is made to be freely slidably supported by each of four jaw guide grooves 3 of the work side frame 4 and utilizing a punch guide cylinder 9 of a punching arm body 10 fixed to a jaw 8 for setting punching location which moves along jaw guide grooves 3 provided at equal angle intervals on the punch side frame 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punching jig for an index circle pitch which is mainly used when drilling a pilot hole, a bolt hole, a mounting hole, etc. in a circular or square flange or the like. .

[0002]

2. Description of the Related Art Generally, to form a hole at a predetermined position of a work such as a flange, a. Means for producing a variety of dedicated jig gauges corresponding to various sizes and the number of bolt holes and directly drilling at a drilling position; b. Means for equally dividing and fixing the drill side, which is a hole drilling machine, and drilling without marking or punching; c. Optical reading of a boring machine, etc.
Means for piercing by locating an equal angle and a circular pitch radius based on the triangular box numerical value of C reading positioning; d. A means for determining a hole drilling position for each piece of work by marking means and punching the intersection point thereof is employed.

However, as described above, a. b. Since the means for punching a workpiece is a means for processing a large number of processing lots, equipment and
There is a problem in that it is not economical in terms of preparation of a large number of dedicated jigs and lacks versatility, and c. However, this method requires centering of the work set, requires a long time for the work, and has a problem in work efficiency. Therefore, when the number of lots is small, d. In other words, a marking line of a predetermined radius and an equally dividing marking line are drawn for each piece of work such as a flange to determine an intersection point, a drilling position of a bolt hole or the like is determined, and punching is performed at the intersection point. It is the present situation that means for drilling is adopted.

[0004]

In the above-described means in the case where the number of lots is small, when a work has a center hole, a temporary frame material is set in the center hole to set the center. After that, there is a difficulty in setting the center that injuries must be performed.In addition, the circular pitch line and the equally dividing line are injured with respect to the center to find the intersection, and the drilling process must be performed directly or after punching. It is necessary to perform such marking work on each of the workpieces,
The number of working steps is large, which is not only unfavorable in terms of working efficiency, but also makes it impossible to expect uniform high-precision machining.
Moreover, the marking line engraved and displayed on the surface of the work due to the marking operation remains, thereby deteriorating the product quality.

[0005] The present invention is most suitable for use when the number of lots is small, and the work can be smoothly and simply held and punched by a simple operation according to the size of the work and the number of lots. Work centering, circular pitch and equal division are simple, quick and efficient, and the punching position can be set accurately, improving the overall work efficiency of drilling at equal positions and leaving a marking line on the product surface. An object of the present invention is to provide a punching jig for an indexing circle pitch that does not have any problem.

[0006]

A punching jig for an index circle pitch according to the present invention comprises a plurality of jaw guides which open a workpiece side scroll body (1) and a punching side scroll body (2) on the outer peripheral side. The work-side frame (4) and the punch-side frame (5) are independently and smoothly rotatably supported by the work-side frame (4) and the punch-side frame (5), each having the groove (3) formed radially from the center. The work-side scroll (1) rotates in each of the jaw guide grooves (3) of the work-side frame (4).
Attach the work clamp jaw (6) that fits and moves to (3), and install the jaw guide groove (3) in the punch side frame (5).
Each of them has a punch position setting jaw (8) fitted and moved in the jaw guide groove (3) by rotation of the punching scroll body (2).
(8), the other end of a punching arm body (10) having at its tip a punch guide cylinder (9) in the direction parallel to the rotation center line of the punching scroll body (2) is fixed. Punching position setting scale (51) on frame (5) etc.
Is provided.

In the above construction, an arc-shaped section (hereinafter, referred to as a semicircular section) having an arc-shaped cross section of less than 180 degrees is provided on each of opposing surfaces of the workpiece-side scroll body (1) and the punching-side scroll body (2). The bearing groove (12) is formed concentrically with respect to the center of rotation, and each frame is supported with the rolling ball (13) sandwiched.The jaw guide groove (3) is rotated A configuration in which the guide ball (18) is formed by a pin insertion means or the like in a sliding direction of the circular inner wall surface, with a circular cross section securing engagement of the moving ball (15) with the scroll groove (14) and sliding of each jaw. And this jaw guide groove
(3) The guide grooves (61) engaging with the guide strips (18) and the rolling balls (15) engaging with the scroll grooves (14) are arranged in a line in the sliding direction at the pitch of the scroll grooves (14). Cooperation of fitting the formed work clamp jaw (6) and punch position setting jaw (8) provided in the formed ball storage part (20) consisting of a concave part such as a spherical surface, a cone, or a countersink, etc. Thereby, the movement of each part can be made accurate and smooth operation, and operability and work efficiency can be improved.

Further, a punching arm body (10) provided on a punch position setting jaw (8) of a punching scroll body (2) has a punch guide cylinder (9) in which, for example, the punch guide cylinder (9) is changed from a center side to an outer peripheral side. By mounting or fixing the base end to the center of rotation so that it can be reversed and fixed in the radial direction, it is possible to use the same punch position setting jaw (8), but also to correspond to the required diameter of the punching position. it can.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION

DESCRIPTION OF THE PREFERRED EMBODIMENTS An indexing circle pitch punching jig according to an embodiment of the present invention will be described with reference to a work-side scroll assembly (W) and a punching-side scroll assembly (P). FIG. 1 is an irregular half cross-sectional view showing a state in which the work-side scroll assembly (W) and the punching-side scroll assembly (P) are connected, and FIG. 2 is a work clamp side of the work-side scroll assembly (W). FIG. 3 is a sectional view taken along line AA of FIG. 2, FIG. 4 is an enlarged sectional view taken along line BB of FIG. 2, FIG. 5 is a rear view, and FIG. FIG. 7 is a front view showing the punching work surface of the punching-side scroll assembly (P) as the front, and FIG. 7 is a cross-sectional view taken along line CC of FIG.

First, the work-side scroll assembly (W) shown in FIGS. 2 to 4 will be described. The work-side scroll assembly (W) includes a work-side frame (4) and a work-side scroll (1). , Four work clamp jaws (6) and a clamp-side jaw plate (7) fixed to the work clamp jaws (6).

The work side frame (4) is formed with a punching work space hole (41) through the center of the circular plate and a work side boss (42) for covering the work side scroll body (1). The punching work space hole (41) is formed concentrically with the center of the punching work space hole (41), a coupling concave edge (43) is provided on the coupling side of the punching work space hole (41), and four radially on the opposite surface side. The jaw guide grooves (3) are formed at regular angular intervals.

The jaw guide groove (3) has an engaging opening surface (16) for engaging a rolling ball (15) with a scroll groove (14) and a clamp-side jaw plate ( 7)
It has a circular cross section with a fixing opening surface (17) formed to secure the fixing, and forms a fitting groove (31) for fitting a guide pin in the sliding direction of the circular inner wall surface to form a guide strip (18). The configuration is as follows.

The work-side scroll body (1) is a donut-shaped disk having a crown-covered hole (22) formed on the work-side boss (42) of the work-side frame (4). On one side, scroll grooves (14) having a semicircular cross section are formed at a predetermined pitch, and on the other side, the workpiece-side scroll body is formed.
Two bearing grooves (12) having a semicircular cross section are formed on different predetermined radius lines with the center of (1) as the center.

Four more work clamp side jaws (6)
Are the jaw guide grooves (3) of the work side frame (4).
Into the scroll groove (1
4), and has a fitting portion corresponding to the cross-sectional shape of the jaw guide groove (3), and a scroll is provided at a position corresponding to the engaging opening surface (16) of the fitting portion. A ball receiving portion (20) formed in a spherical concave portion for holding a rolling ball (15) at the same pitch as the groove (14) and engaging with the scroll groove (14).
A guide groove (61) is formed on the side surface of the fitting portion to hold the rolling ball (15) and to fit a guide strip (18) provided in the jaw guide groove (3). ing.

The jaw plate (7) on the clamp side is
A work clamp pawl (71) is exchangeably fixed to one end of a plate portion for fixing to the work clamp side jaw (6), and the other end of the plate portion is fixed to the work clamp side jaw (6). To be fixed.

Next, the punching scroll assembly (P) shown in FIGS. 5 and 6 will be described. The punching scroll assembly (P) comprises a punch frame (5) and a punching scroll (2). ) And 12 punch position setting jaws (8) and a punching arm body (10).

The punch side frame (5) has a hole (41a) for punching work space formed through the center of the circular plate and engages with the connecting concave edge (43) of the work side frame (4). On the side opposite to the punching side boss (53) in which the engaging rim tube (52) is formed, 12 jaw guide grooves (3 ) Is formed, and on the surface on which the jaw guide groove (3) is formed, in the radial direction along any of the jaw guide grooves (3),
Punching position setting scale (51) serving as a reference for setting the punching position dimension, and an instruction line (55) indicating a subdivision scale (44) on the back surface periphery of the punching scroll body (2) at one location of the peripheral portion. ) Is displayed or engraved.

The jaw guide groove (3) has the same configuration as the jaw guide groove (3) of the work side frame (4) (see FIG. 4), and has a scroll groove (14) of the rolling ball (15). )
Into a circular cross-section with an engaging opening surface (16) for engagement with the fixing opening surface (17) for securing the bracket (24) to each jaw, and in the sliding direction of the circular inner wall surface. The guide pin is fitted to form a fitting groove (31) for forming a guide strip (18).

The punching scroll body (2) has the same structure as the work side scroll body (1), and is provided with a crowned hole that is crowned and supported on the punching side boss (53) of the punch side frame (5). (22) is formed in a donut-shaped disk, a scroll groove (14) having a semicircular cross section is formed at a predetermined pitch on one surface, and a work-side scroll body is formed on the other surface.
Two bearing grooves (12) having the same diameter and a semicircular cross section are formed as the two bearing grooves (12) formed in (1).

The twelve punch position setting jaws (8)
Are the same as the work clamp side jaws (6) (see FIG. 4), and are fitted into the jaw guide grooves (3) of the punch side frame (5) to be engaged with the scroll grooves of the punching scroll body (2).
(14), has a fitting portion corresponding to the cross-sectional shape of the jaw guide groove (3), at a position corresponding to the engaging opening surface (16) of the fitting portion, At the same pitch interval as the scroll groove (14), a ball housing (20) for holding the rolling ball (15) is provided so as to engage with the scroll groove (14), and the rolling ball (15 ) Is held with grease or the like, and on the side of the fitting part,
A guide groove (61) is formed for fitting a guide strip (18) provided in the jaw guide groove (3).

The punching arm body (10) has the same number as the punch position setting jaws (8), and a punch tool is provided at the tip of an arm for fixing to the punch position setting jaws (8). A punch guide cylinder (9) for inserting the same (see FIG. 6) is fixed, and a base end portion is fixed to the punch position setting jaw (8).

The fixing of the punching arm body (10) to the jaw (8) for setting the punch position is performed via a bracket (24) fixed to the jaw (8) for setting the punch position. The shaft (25) and the restraining pin (26) are inserted into the pin holes radially formed on both sides of the shaft (25) and are connected to the bracket.

The punching jig for the indexing circle pitch described above has an irregular half section shown in FIG. 1 (for convenience of explanation, the jaw guide grooves (3) of the work side frame (4) and the punch side frame (5)).
And the screw connection part is shown in the same cross section),
The work-side scroll assembly (W) and the punching-side scroll assembly (P) support the work-side scroll body (1) on the work-side boss (42) of the work-side frame (4), and Punching scroll body on boss (53)
(2) is supported, and rolling balls (13) are inserted into two bearing grooves (12) and (12) formed on the respective surface contact surfaces (FIG. 1,
(See FIG. 3), the bosses of the work side frame (4) and the punch side frame (5) are butt-engaged and engaged with each other, and assembled by screw connection (not shown). Jaw guide groove on side frame (5)
(3) and the jaw guide groove (3) of the work side frame (4) are joined so that they do not overlap on the front and back, and the work side scroll
The work clamp side jaw (6) is moved in the radial direction by the manual rotation of (1) (manual handle, not shown), and the work clamp jaw (71) of the clamp side jaw plate (7) fixed to it is used. Clamp the workpiece, and rotate the punch side scroll body (2) with a manual handle (not shown) to stroke the punch position setting jaw (8).
(S) and move the punch position setting jaw (8)
The punch guide cylinder (9) of the punching arm body (10) fixed to the position is set and fixed at a desired circular pitch line position (the locking body of the punching arm body (10) is not shown in the drawing, but one of the punches is not shown). Jaw guide groove on side frame (5)
(3) In the meantime, after a lock screw for pressing the scroll forming surface of the punching scroll body (2) is provided), the punch tool (p) is inserted into the punch guide cylinder (9) (see the phantom line in FIG. 3). ) Is inserted and hit in the direction of the work, whereby accurate punching can be performed on the work surface.

The work procedure is as follows. The punching jig for the indexing circle pitch according to the present invention clamps a work (for example, a flange) placed on a table surface with the work side frame (4) as a lower surface, and then a punch. Move and set the circular pitch position of the guide tube (9), insert the punch tool (p) into the punch guide tube (9), hit its head toward the work, and move it along a predetermined radius line of the work surface. By performing punching at the equally divided positions, punching can be performed on a large number of the same workpieces without marking each one. When the radius of the punching position is large, the punching arm body (10) is reversely mounted (see the phantom line in FIG. 7) or inverted, and the punch guide cylinder (9) is moved to the work side frame.
(4) Set so that it is located on the outer periphery.

In the above embodiment, the rolling ball (15) or the rolling ball (13) is used with the groove of each part being approximately semicircular, but the shape of the groove is not limited to this. As with the conventional scroll chuck, the problem of the present invention can be solved even with the engagement of the scroll angular groove and the angular teeth.The reason why the number of the work clamp side jaws (6) must be four is also as follows. Needless to say, the number may be three, and a handle may be provided, for example, on the upper edge of the diameter line of the work-side scroll body (1) in order to facilitate carrying during work.

[0026]

According to the punching jig for the indexing circle pitch described above, each jaw is slid radially in the radial direction by the turning operation of the two scroll bodies, the work side scroll body and the punching side scroll body. Since the work is clamped by one jaw and the punch position is set by the other jaw, and the whole is integrated, a work such as a flange, a pilot hole,
In setting the drilling position of the bolt hole, the hole is closed with a temporary material to form the center of the drilled work as in the past, a center hole is drilled, and a pitch circle and a fraction are formed based on the center hole. It is not necessary to perform complicated marking work, such as dividing the work equally at the index pitch, for each work. Without needing,
Punching can be easily performed at a precise position perpendicular to the workpiece,
Also, there is no marking line remaining on the surface of the work, so that the quality does not deteriorate.

In particular, since each scroll body is a centripetal clamp, the work set is simple, the processing accuracy and the repetition accuracy are high, and the index is set to an angle of 2 to 8 equally. There is no need for angle change indexing, and accurate angle indexing with machine accuracy is guaranteed.

In addition, since both the inner diameter clamp and the outer diameter clamp can be used depending on the size of the work, there is no need to perform the work of injuring and punching the mating main body with the actual body as in the prior art. Can be accurately matched.

Furthermore, compared to the dedicated jig, the pitch and the number of equal divisions can be easily changed and coped with, and the jig which sets the indexing angle and punches one by one each time the work is changed is provided. In comparison, O of clamp quickly
With N and OFF, many works can be operated with the same accuracy.

In general, the number of holes to be drilled at a circular pitch is often equal to 3, 4, 6, or 8, but the unnecessary holes can be used to hinder the punching operation because the punching arm body can be reversed and retracted. Since it is convenient and can be used for punching to a large-diameter work in the opposite mounting or reversing position, the split jig according to the present invention for the intermediate diameter range that cannot be covered by one indexing circular pitch punching jig. With the equipment of the punching jig for the projected circle pitch, the range of the processing circle pitch can be expanded to a wide range from a small diameter range to a large diameter range.

The slide of the work clamping jaw mounted on the work side frame of the work side scroll body is 3 to 4 equally divided, but the punch side frame is previously divided into 4 equally divided, 6 equally divided and 8 equally divided. Since the jaw guide setting grooves are provided with punch position setting jaws, respectively, it is possible to arbitrarily use equal parts as needed and change the minute angle without changing the minute angle. , 8 positions can be accurately punched.

Further, the groove of each scroll body has a semi-circular cross section, and a ball housing is provided at the center of each jaw side at the same pitch interval as the scroll groove to hold a rolling ball, and is provided in the groove of each scroll body. Since they are engaged with each other, they are smoothly slid by the rolling balls, and the jaw-side groove is not required to be secondly machined as compared with a general scroll, so that accurate workability and accuracy can be improved.

Each of the jaws and each of the jaw guide grooves can be formed by circular processing in cross section, so that the manufacturing process is facilitated, and the rotation of the jaws with respect to the jaw guide grooves caused by this is prevented. Since it can be easily formed by the engagement of the groove, the processing accuracy and workability are good and the apparatus can be made compact.

Further, by manually turning and rotating the outer periphery of each scroll body manually to adjust and rotate the work, the position of the clamp and the punch of the work can be accurately set, so that the dimension can be set with high accuracy.

If the indexing punch position which has been set once is set and fixed, the accuracy of the indexing punch position which has been set and set can be maintained and work can be performed even if the workpiece is repeatedly attached and detached by rotating the work side scroll body. The rolling ball set in the ball storage section slides on the scroll side in the rolling ball storage section, and operates smoothly with high accuracy as a whole.

Rolling balls are arranged annularly between the scroll members so as to function as bearings, and the thrust between each scroll member and each jaw becomes smooth due to the bearing effect of the rolling balls themselves. .

Further, the rotation of each scroll body is clamped by manually clamping the outer periphery of the scroll body itself to clamp the work, and does not rotate together with the rotation of the punching scroll body.

Although the above description has been made solely as a punching jig, a pilot hole can be directly drilled without punching the work, so that it can also be used as a drilling jig for a drilling apparatus. .

[Brief description of the drawings]

FIG. 1 is an irregular half sectional view of a punching jig for an index circle pitch according to the present invention.

FIG. 2 is a front view showing a work clamp side surface of a work side scroll assembly (W) of the indexing circle pitch punching jig according to the present invention as a front surface.

FIG. 3 is a cross-sectional view taken along line AA of FIG.

FIG. 4 is an enlarged sectional view taken along line BB of FIG. 2;

FIG. 5 is a rear view of the work-side scroll assembly (W).

FIG. 6 is a front view showing a punching work surface of the punching-side scroll assembly (P) as a front face;

FIG. 7 is a sectional view taken along line CC of FIG. 6;

[Explanation of symbols]

 (W) Work-side scroll assembly (P) Punching-side scroll assembly (1) Work-side scroll (2) Punching-side scroll (3) Jaw guide groove (4) Work-side frame (5) Punch-side frame (6) Jaw for work clamp (7) Jaw plate on clamp side (8) Jaw for setting punch position (9) Punch guide tube (10) Punching arm body (12) Bearing groove (13) Rolling ball (14) Scroll groove (15) Rolling ball (16) Opening surface for engagement (17) Opening surface for fixing (18) Guide strip (20) Ball holder (22) Hole for crown (24) Bracket (25) Reversing center shaft ( 26) Suppressing pin (31) Fitting groove (41) Hole for punching work space (41a) Hole for punching work space (42) Work side boss (43) Concave edge for connection (44) Fine scale (51) Punching position setting (52) Engagement tube (53) Punching side boss (55) Indicator line (61) Guide groove (71) Work clamp jaw

Claims (2)

[Claims] A work-side frame (4) in which a work-side scroll body (1) and a punching-side scroll body (2) are formed radially from a center with a plurality of jaw guide grooves (3) opened on the outer peripheral side. The work-side frame (4) and the punch-side frame (5) are connected and fixed to the punch-side frame (5) so that they can rotate independently and smoothly.
In each of the jaw guide grooves (3) of (4), a work clamp jaw (6) that fits and moves in the jaw guide groove (3) by rotation of the work-side scroll body (1) is attached. A punch position setting jaw that fits into the jaw guide groove (3) by rotating the punching scroll body (2) into each of the jaw guide grooves (3) of the side frame (5).
(8) is mounted, and the punch position setting jaw (8) has a punch guide cylinder (9) at a tip end thereof in a direction parallel to the rotation center line of the punching scroll body (2). A punching jig for an indexing circle pitch, characterized in that the other end of (10) is fixed and a punching position setting scale (51) is provided on the punch side frame (5) and the like. The scroll grooves (14) of the work-side scroll body (1) and the punching-side scroll body (2) are formed in an arc shape having a cross-sectional arc angle of less than 180 degrees, and the jaw guide grooves (3) are A guide strip (18) was formed by a pin insertion means or the like in a sliding direction of the circular inner wall surface as a circular cross section securing engagement of the rolling ball (15) with the scroll groove (14) and sliding of each jaw. Configuration and this jaw guide groove (3)
In addition, the guide groove (61) engaged with the guide strip (18) and the rolling ball (15) engaged with the scroll groove (14) have a scroll groove.
Ball storage part (20) formed in a line in the sliding direction at the pitch of (14)
2. A punching jig for an index circle pitch according to claim 1, wherein the work clamping jaws (6) and the punch position setting jaws (8) provided in the housing are fitted.