Positioning tool for machining rotary body workpiece by machining center

Abstract

The utility model relates to a positioning tool for machining a rotary body workpiece in a machining center, the machining center is provided with a carriage and a machine tool fourth shaft, and the rotary body workpiece is provided with an axial inner hole; the positioning tool comprises a positioning pin, a positioning mandrel and a positioning base, the rotary body workpiece is connected to a fourth shaft of the machine tool and can rotate along with the fourth shaft of the machine tool, the positioning base is detachably arranged on the carriage, the positioning mandrel is connected to the positioning base, a positioning hole is formed in the side face of the rotary body workpiece, and the positioning pin is inserted into the positioning hole; the side wall of one end of the positioning pin abuts against the top face of the positioning mandrel. According to the positioning tool, by adjusting the height of the positioning mandrel, the rotating body workpiece rotates to drive the positioning pin to abut against the top face of the positioning mandrel, the angle between the positioning pin and the vertical face at the moment is measured, then the rotating body workpiece is reversely rotated by the same angle, and therefore it can be guaranteed that the positioning pin is in the vertical state; therefore, alignment of the positioning hole in a machining center coordinate system is achieved, and machining efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of machining center machining rotary body workpiece positioning tooling, belong to tooling technical field for machining center. BACKGROUND

[0002] For the machining scene that rotary piece needs to be punched using U drill in machining center, the current machining mode is to machine positioning hole on the side of workpiece, connect workpiece on the fourth axis of machine tool of machining center using chuck, then carry out dowel positioning in machining center, by adjusting dowel vertical slow descent, and adjusting the rotation of workpiece driven by chuck, make dowel fall into the positioning hole on rotary workpiece, at this time, it shows that the A-axis coordinate of positioning hole is 0 degree, the positioning of the positioning hole in the coordinate system of machining center is completed;

[0003] But the above positioning process needs to control machine tool and adjust fourth axis simultaneously, and in the actual operation process at present, the above operation needs to be carried out separately for each rotary workpiece to be machined, which is time-consuming and laborious, and low in efficiency. UTILITY MODEL CONTENTS

[0004] The utility model discloses a positioning hole positioning is convenient, and positioning tooling for machining center with high efficiency is provided to solve the problems in the prior art.

[0005] In order to achieve the above purpose, the technical scheme provided by the utility model is as follows: a kind of machining center machining rotary body workpiece positioning tooling, the machining center is equipped with drag plate and machine tool fourth axis, and the rotary body workpiece is equipped with axial inner hole;The positioning tooling includes positioning pin, positioning mandrel and positioning base, the rotary body workpiece is connected to the fourth axis of machine tool and can rotate with the fourth axis of machine tool, the positioning base is detachably arranged on the drag plate, the positioning mandrel is connected to the positioning base, the rotary body workpiece is provided with positioning hole on side surface, and the positioning pin is inserted into the positioning hole;The rotary body workpiece drives the positioning pin to swing, and the side wall of one end of the positioning pin abuts against the top surface of the positioning mandrel.

[0006] The further design of the above technical scheme is as follows: the sum of the height of the top surface of the positioning mandrel and the radius of the positioning pin matches the center height of the fourth axis of machine tool;When the positioning pin abuts against the top surface of the positioning mandrel, the positioning pin is arranged along the horizontal direction.

[0007] Threaded hole is arranged in the middle of the positioning base, the positioning mandrel is provided with threaded segment, and is arranged on the positioning base through the cooperation of threaded segment and threaded hole.

[0008] Positioning groove is arranged at both ends of the positioning base, a plurality of convex grooves are arranged on the drag plate, and the positioning base is connected to the drag plate by connecting the positioning groove and the convex groove through draw nail.

[0009] The positioning base side is provided with locking holes communicated with the threaded holes, and locking screws are arranged in the locking holes and abut against the threaded section of the positioning mandrel.

[0010] The positioning hole of the side of the rotary workpiece is arranged along the radial direction of the rotary workpiece and has a diameter matched with the diameter of the positioning pin.

[0011] The machine tool is provided with a chuck on the fourth shaft, and the rotary workpiece is connected to the fourth shaft of the machine tool through the chuck and is coaxially arranged with the fourth shaft of the machine tool.

[0012] The positioning tool further comprises a tail seat which is slidingly connected to the drag plate, and a center is arranged on the tail seat and coaxially arranged with the rotary workpiece.

[0013] One side of the blind head is provided with a boss matched with the inner hole of the rotary workpiece, and the boss is embedded in the inner hole.

[0014] The positioning tool has the advantages that:

[0015] The positioning tool of the utility model, through adjusting the height of the positioning mandrel, makes the rotary workpiece rotate and drive the positioning pin to abut against the top surface of the positioning mandrel, measures the angle between the positioning pin and the vertical surface at this time, then reversely rotates the rotary workpiece by the same angle, so that the positioning pin can be guaranteed to be in the vertical state, the A-axis coordinate of the positioning hole is 0 degree at this time, the alignment of the positioning hole in the machining center coordinate system is completed, only the fourth shaft of the machine tool needs to be adjusted, and the height position and height of the positioning mandrel and the reverse angle of the rotary workpiece after contacting the positioning mandrel can be used for the alignment of each same workpiece subsequently, so that the machining efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic view of the positioning tool of the utility model;

[0017] Figure 2 It is a top view of the positioning tool of the utility model;

[0018] Figure 3 It is a sectional view of the positioning tool along the center line of the workpiece;

[0019] Figure 4 It is a sectional view of the positioning tool along the center line of the positioning pin;

[0020] Figure 5 It is a schematic view of the positioning mandrel and the positioning base;

[0021] Figure 6 It is a schematic view of the positioning base;

[0022] Figure 7 Positioning core shaft schematic diagram;

[0023] Figure 8 Positioning tool alignment process schematic diagram of the utility model;

[0024] In the figure: 1-rotary workpiece, 2-positioning pin, 3-positioning part, 31-positioning base, 311-mounting groove, 312-thread hole, 313-locking hole, 32-positioning core shaft, 321-thread section, 4-tailstock, 5-center, 6-socket, 7-chuck, 8-chuck flange, 9-fourth shaft, 10-drag plate. DETAILED DESCRIPTION

[0025] The utility model will be explained in detail below in combination with the drawings and specific embodiments. Embodiment one

[0026] The machining center of this embodiment is used for positioning tool of rotary workpiece, as shown in Figure 1 and Figure 2 , wherein the machining center is provided with the drag plate 10, and the fourth shaft 9 of the machine tool is arranged on the drag plate 10.

[0027] The rotary workpiece 1 is provided with an inner hole arranged in the axial direction, and a positioning hole is arranged in the radial direction on the side surface for facilitating positioning and alignment; the rotary workpiece 1 is connected to the fourth shaft 9 of the machine tool through the chuck 7 and is coaxially arranged with the fourth shaft of the machine tool, and the chuck 7 is connected to the fourth shaft 9 of the machine tool through the chuck flange 8 and can rotate under the driving of the fourth shaft 9.

[0028] In combination with Figure 3 and Figure 4 , the positioning tool of this embodiment further comprises the tailstock 4, a plurality of convex grooves arranged in the axial direction of the fourth shaft are arranged on the drag plate 10, the tailstock 4 is slidably connected to the drag plate 19 through a draw bolt and can be fixed, the tailstock 4 is provided with the center 5 coaxially arranged with the rotary workpiece 1, the rotary workpiece 1 is connected to the socket 6 at the end close to the center 5, the socket 6 is provided with a boss matching the inner hole of the rotary workpiece at the side close to the rotary workpiece 1, the socket 6 is positioned and fixed relative to the rotary workpiece 1 by embedding the boss into the inner hole, the position of the tailstock 4 is adjusted so that the center 5 abuts against the socket 6, and the chuck 7 is used to complete the clamping of the rotary workpiece 1, and the rotary workpiece 1 drives the socket 6 to rotate relative to the center 5.

[0029] The positioning tool of this embodiment further comprises the positioning pin 2 and the positioning part 3, the diameter of the positioning pin 2 matches the hole diameter of the positioning hole on the side surface of the rotary workpiece 1. The positioning part 3 comprises the positioning core shaft 32 and the positioning base 31, the positioning base 31 is detachably arranged on the drag plate 10, and the positioning core shaft 32 is connected to the positioning base 31; the positioning pin 2 is inserted into the positioning hole of the rotary workpiece 1.

[0030] Combination Figure 5 , Figure 6 and Figure 7 As shown, the positioning base 31 has a threaded hole 312 in the middle and positioning grooves 311 at both ends. The positioning base 32 is connected to the slide plate 10 by connecting the positioning grooves 311 and the convex grooves on the slide plate 10 through a pull stud.

[0031] The positioning spindle 32 has a threaded section 321 at its bottom and is mounted on the positioning base 31 by engaging with the threaded hole 312 on the positioning base 31. The side of the positioning base 31 has a locking hole 313 that communicates with the threaded hole 312. A locking screw is provided in the locking hole 313. When the locking screw is turned, one end of the locking screw can abut against the threaded section 321 of the positioning spindle to lock the positioning spindle 32.

[0032] When using the positioning fixture in this embodiment, first connect the rotating workpiece 1 to the chuck 7 and make the rotating workpiece 1 coaxial with the fourth axis 9 of the machine tool. Then adjust the position of the tailstock 4, and use the tailstock 4 and the end cap 6 to hold the rotating workpiece 1, thereby clamping the rotating workpiece 1 and ensuring that the rotating workpiece 1 is fixed in the axial position.

[0033] Connect the positioning base 31 and the positioning spindle 32, and lock them with locking screws. Then fix the positioning base 31 to the slide plate 10 with pull pins so that the positioning spindle 32 is located on the side of the rotating workpiece 1 and is in the same radial direction as the positioning hole, ensuring that the side wall of one end of the positioning pin 2 inserted into the positioning hole can touch the top surface of the positioning spindle 32.

[0034] like Figure 8 As shown, insert the locating pin 2 into the locating hole of the rotating workpiece 1, rotate the fourth axis 9 to rotate the rotating workpiece 1, so that the locating pin 2 fits exactly against the top of the locating spindle 32. Measure the A-axis coordinate of the locating hole at this time, that is, the angle between the setting direction of the locating pin 2 and the vertical direction. Then, rotate the rotating workpiece 1 in the opposite direction according to this angle, and the locating pin 2 will be exactly vertical. Remove the locating pin 2. At this time, the alignment of the locating hole of the rotating workpiece 1 in the machining center coordinate system is completed. Then, use a U drill to drill holes in the workpiece.

[0035] The subsequent machining of other rotating workpieces 1 can utilize the position of the positioning fixture and the reversal angle after the rotating workpiece 1 contacts the positioning mandrel 32. This allows for the same alignment of the positioning holes of other rotating workpieces 1 in the machining center coordinate system. The alignment is simple and accurate. Existing alignment methods require nearly 5 minutes for a single workpiece, while the method of this embodiment can shorten this to about 2 minutes. This significantly reduces the positioning preparation time for U-drill machining of workpieces, improves overall productivity, and can greatly enhance efficiency in batch processing. Example 2

[0036] The positioning tool of the embodiment is basically the same as that of the first embodiment, and the difference is that the top surface height of the positioning mandrel 32 in the embodiment is set according to the center height h of the fourth axis of the machine tool and the diameter D of the positioning pin, and specifically h-D / 2, that is, the sum of the top surface height of the positioning mandrel 32 and the radius of the positioning pin 2 is equal to the center height of the fourth axis 9 of the machine tool, so that when the positioning pin 2 rotates with the rotary workpiece 1 and is attached to the top surface of the positioning mandrel 32, the positioning pin is just horizontally arranged, at this time, the A-axis coordinate of the positioning hole can be ensured to be 90 degrees, and then the rotary workpiece is reversed by 190 degrees, the A-axis coordinate of the positioning hole is adjusted to 0 degrees, then the positioning pin 2 is just vertical, the positioning pin 2 is taken out, and at this time, the positioning of the positioning hole of the part in the machining center coordinate system is completed.

[0037] The embodiment can save the measuring angle process in the first embodiment by setting the top surface height of the positioning mandrel 32, further improving the efficiency, and for different types of workpieces, the top surface height of the positioning mandrel 32 can be adjusted by the locking screw to meet the above requirements.

[0038] The technical scheme of the utility model is not limited to the above-mentioned embodiments, and any technical scheme obtained by equivalent replacement falls within the scope of the utility model.

Claims

1. A machining center machining rotary body workpiece positioning tool, the machining center is provided with a drag plate and a machine tool fourth axis, and the rotary body workpiece is provided with an axial inner hole; characterized in that: The positioning tool includes a positioning pin, a positioning mandrel and a positioning base, the rotary workpiece is connected to a fourth axis of a machine tool and can rotate with the fourth axis of the machine tool, the positioning base is detachably arranged on a drag plate, the positioning mandrel is connected to the positioning base, the rotary workpiece is provided with a positioning hole on a side surface thereof, and the positioning pin is inserted into the positioning hole. ​ The rotary workpiece drives the positioning pin to swing, and one end of the positioning pin abuts against a top surface of the positioning mandrel.

2. The machining center machining rotary body workpiece positioning tooling fixture of claim 1, wherein: The sum of the height of the top surface of the positioning mandrel and the radius of the positioning pin matches the center height of the fourth axis of the machine tool, and the positioning pin is arranged in a horizontal direction when abutting against the top surface of the positioning mandrel.

3. The machining center machining rotary body workpiece positioning tooling fixture of claim 2, wherein: The positioning base is provided with a threaded hole in a middle portion thereof, the positioning mandrel is provided with a threaded segment, and the positioning mandrel is arranged on the positioning base through cooperation of the threaded segment and the threaded hole.

4. The machining center machining rotary body workpiece positioning tooling fixture of claim 3, wherein: The positioning base is provided with a positioning groove at two ends thereof, the drag plate is provided with a plurality of convex grooves, and the positioning base is connected to the drag plate through cooperation of the positioning groove and the convex groove by means of a draw bolt.

5. The machining center machining rotary body workpiece positioning tooling fixture of claim 4, wherein: The positioning base is provided with a locking hole in communication with the threaded hole in a side surface thereof, and a locking screw is arranged in the locking hole and abuts against the threaded segment of the positioning mandrel at one end.

6. The machining center machining rotary body workpiece positioning fixture according to claim 1, characterized in that: The positioning hole in the side surface of the rotary workpiece is arranged in a radial direction of the rotary workpiece and has a diameter matching that of the positioning pin.

7. The machining center machining rotary body workpiece positioning fixture according to claim 1, characterized in that: The fourth axis of the machine tool is provided with a chuck, and the rotary workpiece is connected to the fourth axis of the machine tool through the chuck and is coaxially arranged with the fourth axis of the machine tool.

8. The machining center machining rotary body workpiece positioning fixture according to claim 1, characterized in that: The tailstock is slidably connected to the drag plate, the tailstock is provided with a center pin coaxially arranged with the rotary workpiece, a nipple is connected to one end of the rotary workpiece close to the center pin, the center pin abuts against the nipple, and the rotary workpiece drives the nipple to rotate relative to the center pin.

9. The machining center machining rotary body workpiece positioning fixture according to claim 8, characterized in that: One side of the nipple is provided with a boss matching an inner hole of the rotary workpiece, and the boss is embedded in the inner hole.

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