JP4159638B2 - Work positioning device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus that is attached to a work vise used for fixing a work (workpiece) to a table of a machine tool and defines the position of the work in a direction perpendicular to the clamping direction of the vise.
[0002]
[Prior art]
The work vice is widely used to fix a work machined by a drilling machine or a milling machine to a table of a machine tool. When workpieces are large or complex in shape, the principle is to work with one or more workpieces fixed by one or more vices. However, the workpieces are small and long and simple. When the number of machining is large, a plurality of workpieces are often fixed together with a vise for machining. FIG. 7 is a plan view schematically showing a state in which a plurality of elongated works are fixed together with two vices. In this example, two work vices 23 and 23 are arranged in parallel, and a plurality of works are fixed together between the fixed claws 3 and 3 and the moving claws 4 and 4. When the workpiece 5 is pinched by the work vice, the workpiece is pressed against the fixed claw 3 by the moving claw 4, and therefore the position of the workpiece in the direction clamped by the vice 23, 23 is defined by the fixed claw 3, 3. However, since the position of the workpiece in the direction orthogonal to the clamping direction cannot be defined, when machining the end surfaces of the workpieces held together as shown in the figure, the entry / exit occurs at the positions of the end surfaces of multiple workpieces. Processing becomes difficult. Therefore, as shown in the figure, by attaching a contact plate 22 that defines the position of the end surface of the work to the table and bringing one end of the work into contact with the contact plate, the work in the direction perpendicular to the clamping direction of the vice is obtained. The position is specified.
[0003]
However, when such a contact plate 22 is provided, the end surface of the workpiece on the side in contact with the contact plate cannot be processed. Therefore, after machining one end of the workpiece, it is troublesome that the other end surface must be machined by reversing and fixing the workpiece direction. In this case, if the contact plate 22 is removed, the end surface on the side in contact with the contact plate 22 can also be processed. However, when the next workpiece is processed, the contact plate 22 must be attached again. On the contrary, there is a problem that the mounting position of the contact plate 22 is not constant and the dimensions of the processed workpiece vary.
[0004]
[Problems to be solved by the invention]
In the above case, if the jig that defines the position of the end face of the work can be easily attached to and detached from the work vise and the position of the jig when mounted is kept constant, Processing can be performed in a short time with simpler operations.
[0005]
In view of the above, the present invention can easily attach and detach the positioning jig that defines the position of the workpiece in the direction orthogonal to the holding direction of the vise when machining the workpiece, and is attached to the positioning jig. An object of the present invention is to obtain a workpiece positioning device that can reproduce the position of the workpiece with high accuracy.
[0006]
[Means for Solving the Problems]
The workpiece positioning device of the present invention includes a jig mounting device 51 and a positioning jig that comes into contact with an end surface of a workpiece clamped by a vice in a direction orthogonal to the clamping direction. The jig mounting device 51 includes an L-shaped presser bracket 53 as well as an L-shaped main body bracket 52, and the main body bracket 52 is formed so that a half of the length of the length side in a plan view is narrow. The bracket 53 is pivotally attached to the main body bracket 52 with a pin 54 in a state where the narrow portion 52a is inserted into a long hole 53a provided in the vicinity of an L-shaped corner. The two L-shapes of the main body bracket and the presser bracket are pivotally connected by the pin 54 so as to form a U-shape. Between the main body bracket 52 and the presser bracket 53, the U-shape is opened. A spring 55 for applying a force and a screw device 57 having a knob 56 for applying a fastening force in the direction of closing the U-shape are interposed, and the main body bracket 52 is a tap hole for attaching a positioning jig. 69 is provided.
[0007]
In the tap hole 69 of the main body bracket, a positioning plate 63b for defining the position of the end surface of the work clamped by the vice via the spacer 59 as needed, that is, the position in the direction orthogonal to the direction clamped by the vise. In addition, positioning blocks 63a and 63c in which a plurality of positioning rods 65 are planted so as to freely advance and retract are mounted. The main body bracket on which the positioning braid 63b and the positioning block 63a are mounted is inserted into the work vise 23 with the screw device 57 loosened, and the knob 56 is turned to narrow the U shape with the screw device 57. The work vise is clamped by the presser bracket 53 and fixed to the work vise. When machining the workpiece, if the screw device 57 is loosened with the knob 56, the U-shape is opened by the urging force of the spring 55, the fixation to the workpiece vise is released, and the workpiece positioning device can be removed. Interference with the blade can be avoided with a simple operation.
[0008]
Work positioning equipment according to claim 1 is used two jig mounting device 51, the one fixed to one end of the round bar 61, which was attached slidably along other a round bar 61 is there. Between the round bar 61 and the jig mounting device 51, a pedestal 60 for supporting the round bar 61 and a spacer 59 having a suitable size are interposed. A set screw 62 is provided on the pedestal 60 fixed to the round bar 61, and the set screw 62 fixes the relative movement in the axial direction between the round bar 61 and the pedestal 60.
[0009]
In the workpiece positioning device according to the first aspect, one jig mounting device is mounted on the fixed base 17 holding the work claw fixing claw 3 and the other jig mounting device 51 is holding the moving claw 4. Mounted on the movable table 7. In this state, the round bar 61 is parallel to the advancing and retreating direction of the moving claw 4, and one of the jig mounting devices 51 can move in the axial direction with respect to the round bar 61. 4 can be advanced and retracted. Then, with the moving claw 4 opened, a plurality of workpieces are loaded between the fixed claw 3 and the moving claw 4 with the end surface thereof abutting against the round bar 61, and the moving claw 4 is advanced to advance the plurality of pieces. Hold the workpieces together. Then loosen the screw device 57 on both sides of the jig mounting device, removing the jig mounting device 51.
[0010]
The set screw 62 of the cradle 60 can be provided on both cradles. In this case, the space between the cradle and the round bar that can be moved in the axial direction when the jig is attached or detached is set. Fixing with a screw can improve workability at the time of unloading the jig.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 8 is a perspective view showing an example of a work vise particularly suitable for using the work positioning apparatus of the present invention. This work vise has an elongated rectangular base 2, and guide grooves 15 are provided in the longitudinal direction on both side surfaces thereof, and a slide guide 6 that guides the movable bases 7 and 19 is provided above the guide grooves. It has become. A fixed base 17 is fixed to one end of the base 2 by positioning with a key 16, and a fixing claw 3 is fixed to the fixed base.
[0012]
In the base 2, a plurality of guide holes 18 are arranged at regular intervals so as to substantially coincide with the lower side of the guide groove 15. Each guide hole 18 reaches the back surface of the guide groove 15, and therefore, the portion located in the guide groove has a semicircular cross section, and the back end has a circular cross section.
[0013]
Although not shown in the drawing, the first moving table 19 includes a skirt 19a extending on both sides so as to cover the guide groove 15, and a protrusion that fits into the guide groove 15 is formed inside the skirt. Has been. A knock hole penetrating the skirt 19a is provided at the lower side of the ridge. Therefore, the knock hole has a semicircular cross section with a circular cross section at the entrance and an upper half on the back side. In other words, when the semicircular cross-section portion of the upper half of the knock hole of the first moving base 19 and the semi-circular cross-section portion of the lower half of the knock hole provided in the base coincide with each other, It becomes. The first moving base 19 is fixed at a predetermined position of the base 2 by inserting a knock pin 20 into the knock hole in a state where the knock hole is matched with one of the knock holes of the base.
[0014]
A screw rod is mounted on the first moving table 19 in parallel with the guide groove 15 so as not to move in the axial direction, and a screw portion of the screw rod is screwed with a female screw formed on the second moving table 7. The moving claw 4 is fixed to the second moving table 7. The head of the screw rod is exposed on the back surface of the first moving table. By rotating the head 8a or the handle 8, the second moving table 7 is moved forward and backward to move the work between the fixed claw 3 and the workpiece. Hold and release.
[0015]
Figure 1 is a perspective view showing a state where the actual施例attached to the work device of a work positioning apparatus of the present invention, FIGS. 2 and 3 are a front view and a plan view showing a portion of the main portion, that the jig mounting device . The jig mounting device 51 is provided with an L-shaped main body bracket 52 and an L-shaped presser bracket 53, and one end of the main body bracket 52 is formed so that about half of its length is narrow in plan view. The bracket 53 is pivotally attached to the main body bracket 52 by a pin 54 with the narrow portion 52a inserted into a long hole 53a provided in the vicinity of the L-shaped corner. In the illustrated embodiment, the body bracket 52 is provided with three pin holes. This is to enable the pivoting position of the presser bracket 53 and the body bracket 54 to be changed according to the size of the vise. It is. The body bracket 52 and the presser bracket 53 are pivotally connected by a pin 54 to form a U-shape that is inserted into the work vise fixed base 17 and the movable base 7 from above. The body bracket leg 52b and the presser bracket leg 53b that form the opposite sides of the U-shape are shaped so that the body bracket side is in close contact with the side surface of the work vice, and the presser bracket side is at the tip of the leg 52b. A small protrusion 53c is formed to face the opposing leg portion 52b. A compression spring 55 is provided between the main body bracket 52 and the presser bracket 53 to apply an urging force in a direction to rotate the presser bracket 53 around the pin 54 in FIG. Instead of this compression spring, a winding spring wound around the pin 54 can also be used. A screw hole facing the main body bracket is provided at an end portion of the presser bracket 53 extending above the main body bracket, and a screw 57 having a knob 56 attached to the upper end is screwed into the screw hole.
[0016]
On the outer surface of the leg portion 52b of the main body bracket, tap holes are provided at three locations, upper and lower, and the center. In the example shown in the figure, the cradle 60 is fixed via a spacer 59 by two mounting bolts 58 and 58 whose tips are screwed into upper and lower tap holes. The cradle 60 is provided with a round hole 60a for inserting the round bar 61 in parallel with the moving direction of the work vise moving claw 4, and a set screw 62 for fixing the round bar toward the round hole. Is provided.
[0017]
2 and 3 described above, one of the assembly tables of the jig mounting device 51, the spacer 59, and the receiving table 60 is fixed to one end of a round bar 61 of a predetermined length with a set screw 62, and the other One is loosened by the set screw 62 and is mounted so as to be movable in the axial direction of the round bar 61, whereby the workpiece positioning device shown in FIG. 1 is formed. The workpiece positioning device configured as described above is the end face in the longitudinal direction of the workpiece when performing processing with a large number of elongated workpieces held between the workpiece vice as described in FIG. This is particularly effective in determining the position of
[0018]
The jig mounting device 51 can be used to attach various positioning jigs to the work vise. FIG. 4 shows the positioning of the intermediate claw holder mounted between the fixed claw and the moving claw of the work vise by using the jig mounting device 51 to define the positions of the end portions of the workpiece positioned on both sides of the intermediate claw holder. The example which mounted | wore with the plate 63b is shown. The positioning plate 63b is a rectangular plate member fixed to the center tap provided on the leg portion of the main body bracket of the jig mounting device by a mounting bolt 58, and protrudes on both sides of the intermediate claw holder 24. The end surfaces of the two workpieces sandwiched between the intermediate claw and the moving claw are defined at the same position.
[0019]
FIG. 5 shows an example in which a positioning block having a plurality of positioning rods is fixed to the jig mounting device. The positioning block 63a is fixed to the center tap hole provided in the leg portion 52b of the main body bracket of the jig mounting device with a mounting screw 58 via a spacer 59. As with the positioning plate shown in FIG. 4, the positioning block 63a is a square hook-shaped block extending on both sides of the intermediate claw holder, and tap holes in the square direction of each surface of the square hook are provided at both ends. A stud 65 serving as a positioning rod is planted in the hole while being prevented from rotating by a fixing nut 66. Two insertion holes for the mounting bolts in the center of the positioning block are provided in directions orthogonal to each other.
[0020]
In such a configuration, by removing the mounting bolt 58 and rotating the positioning block by 90 degrees and mounting the positioning block on the jig mounting device 51, different studs are directed to the direction of the work fixed to the work vise. Therefore, four types of workpieces can be positioned with one positioning block. Such action on both sides of the central mounting portion 67, also achieved by using positioning block 63 c as shown in FIG. 6 having the different distances of the plurality of surfaces 68 from the plurality of mounting surfaces 67a of the central mounting portion 67 Is possible.
[Brief description of the drawings]
Plan view of the front view [FIG 3] FIG. 2示斜plan view Figure 2 the jig mounting device in a state where the actual施例attached to the work device of a work positioning apparatus of the present invention; FIG 4 shows Osamu FIG. 5 is a perspective view showing an example in which another positioning jig is mounted on the tool mounting device in a state where the tool is mounted on the work vise. FIG. 5 shows a second example in which another positioning jig is mounted on the jig mounting device . FIG. 6 is a perspective view of a third example of another positioning jig . FIG. 7 is a plan view schematically showing a state in which a plurality of elongated workpieces are held together by two work vices. FIG. 8 is a perspective view showing an example of a work vise.
51 Jig mounting device
52 Body bracket
53 Presser bracket
54 pin
55 Compression spring
56 Picking
57 screws
61 Round bar
63b Positioning plate
63a, 63c Positioning block

Claims (1)

Two jig mounting devices (51), and a round bar (61) that abuts the end surface of the workpiece clamped by the vice in a direction perpendicular to the clamping direction on the side surface,
The jig mounting device includes an L-shaped main body bracket (52) and an L-shaped presser bracket (53) that are pivotally connected by a pin (54) so as to form a U-shape. Between the bracket, there is a spring (55) that applies an urging force in the direction of opening the U-shape, and a screw device (57) that includes a knob (56) that provides a fastening force in the direction of closing the U-shape. And the jig mounting device is sandwiched and fixed to the vice,
Said one body bracket of the two jig mounting device (52) is fixed to one end of said rod (61), and wherein Rukoto other is mounted slidably along a round bar (61) Work positioning device.

Images