Drilling device for soft claw machining

Abstract

The present invention is a drilling device for soft claw machining of a lathe, in which a drilling adjustment plate and a claw stopper are moved in a state of keeping in contact along a surface of a spiral protruding surface by left and right rotation of the drilling adjustment plate to control the movement of a soft claw, in which the drilling adjustment plate has the spiral protruding surface formed on an edge of a disk, and the claw stopper is inserted into the spiral protruding surface. The claw retainer is in surface contact with the spiral protruding surface of the drilling adjusting plate with the same diameter, and the claw retainer is connected in the bolt hole of the soft claw to control the movement of the soft claw.

Description

Technical Field

[0001] The present invention relates to a soft jaw fixing device for a chuck used in a lathe. The device fixes the soft jaws so that the soft jaws (Soft Jaws) provided on a machine tool such as a CNC lathe or a compound machining machine and used to firmly fix a workpiece are machined according to the size of the workpiece. In particular, the present invention relates to a device that is installed on the upper part of the soft jaws and can be easily adjusted to a desired size to conveniently fix the soft jaws.

[0002] In addition, the present invention relates to a drilling device for soft jaw machining. When using a CNC lathe, in order to safely hold a workpiece to be machined with accurate concentricity, the inner diameter of the soft jaw is machined so that it precisely contacts the workpiece. Background Art

[0003] Generally, a lathe chuck is a device that firmly fixes a workpiece that cannot be centrally supported by a machine tool such as a lathe or a milling machine using soft jaws. A plurality of slidable jaw seats are installed on the lathe chuck, and soft jaws are installed on the upper part of each jaw seat, and the workpiece is tightly fixed using the soft jaws.

[0004] An arc-shaped circular surface is formed on the soft jaws connected to the jaw seats, so that it precisely adheres to the outer diameter of the workpiece and fixes the workpiece to prevent shaking or vibration during machining. The circular surface of the soft jaws must be machined according to the size of the workpiece. However, since the circular surface of the soft jaws must be different according to the size of the workpiece, the circular surface of the soft jaws needs to be machined in a diverse and precise manner.

[0005] As the prior art, the "jaw fixing device for machining the jaws of a lathe chuck" of Korean Patent Publication No. 2000-0063591 is known.

[0006] Figure 1 FIG. is an exploded perspective view of a jaw fixing device for machining the jaws of a lathe chuck according to the prior art. Figure 2 FIG. is a fixed state diagram of a jaw and a clamping plate according to the prior art.

[0007] The prior art is configured such that circular grooves 8, 8' are formed on the outer diameter of the clamping plate 30, and the circular grooves are engaged with annular ridges 20 formed on the heads of the headed screws 2 connected to the soft jaws 1. The inner circumference of the soft jaws 1 arranged in a triangular shape is determined according to the depth of the circular grooves 8, 8' of the clamping plate 30. Thus, different inner circumferences can be fixed according to the number of a plurality of protrusions with different depths formed on the clamping plate 30. Finally, the number of machining depends on the number of the circular grooves 8, 8' formed on the clamping plate 30, so it is very limited.

[0008] In addition, since a circular groove is formed on the outer diameter of the bite plate 30 and is tightly fixed in contact with the annular rib of the headed screw, the bite plate 30 is fixed in a state where the outer diameter circular grooves 8 and 8' are pushed toward the central portion by the annular rib 20 by the force applied to the central fastening jaw seat 4. Therefore, since only the force in one direction is utilized, there is a problem that the inner circumference of the soft jaw 1 is limited only by the depth of the circular grooves 8 and 8'.

[0009] Figure 3 It is a state diagram of a lathe chuck jaw fixing device according to the prior art.

[0010] A plurality of spiral grooves 51 are formed in a circular shape on the drilling plate 50. After the adjusting slider 40 is movably coupled to the spiral groove, it is installed in the bolt hole of the soft jaw for machining. At this time, the bolt hole of the soft jaw must be aligned with the coupling position of the adjusting slider 40 in order to perform the coupling, but the alignment is somewhat difficult.

[0011] In addition, when machining the soft jaw while the CNC lathe chuck holds the workpiece, the soft jaw is machined by clamping a positioning ring having a diameter smaller than the workpiece. However, when machining the soft jaw in this way, there is a trouble that it is necessary to prepare in advance a plurality of master rings having different diameters and find a master ring having a suitable diameter among the plurality of master rings before machining the soft jaw. Summary of the Invention

[0012] The present invention is proposed to solve the above problems, and its object is to provide a drilling tool for machining a soft jaw, which can precisely machine the inner diameter of the soft jaw without having a plurality of master rings.

[0013] The object of the present invention is to provide a drilling device for machining a soft jaw, which can precisely adjust the clamping width when machining the inner diameter of the soft jaw. Therefore, when re-machining the machined soft jaw, the minimum inner diameter can be machined.

[0014] In order to achieve the above object, a drilling device for machining a soft jaw according to an embodiment of the present invention is disclosed.

[0015] A stop pin inserted into the bolt hole of the soft jaw is formed on the jaw stop member coupled to the soft jaw. A drilling adjustment plate that contacts the jaw stop member and determines the machining diameter of the soft jaw has a circular through hole formed therein and a spiral protrusion surface formed on the edge. The spiral protrusion surface has an outer surface with the smallest radius and an outer surface with the largest radius from the center of the circular through hole on both side surfaces, and the radius length between the two outer surfaces has a spiral shape that increases regularly.

[0016] The number of spiral protrusion surfaces is the same as the number of soft jaws mounted on the lathe chuck. In one embodiment, three soft jaws are coupled to three jaw seats, thereby forming three spiral protrusion surfaces.

[0017] After inserting the stop pins of the three jaw stoppers into the bolt holes of the three soft jaws connected to the three jaw holders, the drilling adjustment plate is installed on the mounting surface of the jaw stopper. At this time, the outer surface with the smallest radius in the spiral protruding surface faces the connecting part of the jaw stopper.

[0018] When the drilling adjustment plate rotates in the direction of increasing radius of the spiral protruding surface, the spiral protruding surface makes a sliding contact with the connecting surface of the jaw stopper.

[0019] When the spiral protruding surface of the drilling adjustment plate makes a sliding contact with the connecting surface of the jaw stopper, the jaw stopper rotates and slides slowly while contacting the spiral protruding surface of the drilling adjustment plate until it is in full close contact. When in full close contact, the drilling adjustment plate can no longer rotate. At this time, if the hydraulic chuck is actuated in the direction of increasing the diameter of the soft jaw, separation will occur between the two closely contacting surfaces, and the drilling adjustment plate can continue to rotate by the amount of separation that occurs. When determining the rotation amount while observing the indicating scale of the jaw stopper and the measuring scale of the drilling adjustment plate, actuating the soft jaw of the hydraulic chuck in the direction of decreasing diameter and making the spiral protruding surface of the drilling adjustment plate in close contact with the meshing surface of the jaw stopper to stop the movement of the soft jaw, the soft jaw can be machined.

[0020] Advantages of the Invention

[0021] As described in detail above, the present invention can be quickly installed on the upper part of the soft jaw connected to the jaw holder of the CNC lathe chuck for precision and delicate machining. Thus, it has the effect of significantly shortening the working time for machining the soft jaw, and can machine a larger diameter compared with the existing drilling ring, so it has the effect of significantly improving the practicality. Description of the Drawings

[0022] Figure 1 Exploded perspective view of a jaw fixing device of a lathe chuck according to the prior art.

[0023] Figure 2 Fixed state diagram of a jaw and a clamping plate according to the prior art.

[0024] Figure 3 State diagram of a soft jaw fixing device of a lathe chuck according to the prior art.

[0025] Figure 4 Exploded view of a drilling device for machining a soft jaw for explaining an embodiment of the present invention.

[0026] Figure 5 View showing the jaw stopper 300.

[0027] Figure 6FIG. 1 is a diagram showing the anti-detachment portion 320 on the upper portion of the stopper body 315 of the claw stopper 300 .

[0028] Figure 7 and Figure 8 FIG. 2 is a diagram showing a drilling adjustment plate 200 . DETAILED DESCRIPTION

[0029] The best mode of implementation of the present invention is as follows Figure 6 As shown, an anti-slip part is added to strengthen the prevention of Figure 5 The stopper body 315 connected to the drilling adjustment plate 200 falls off. Figure 6 An anti-detachment portion 320 is formed on an upper portion of the stopper body 315 of the claw stopper 300 .

[0030] Implementation

[0031] The present invention may be subjected to various modifications and may have various forms, and specific embodiments are shown in the drawings and described in detail in the text. However, it should be understood that this is not intended to limit the present invention to a specific disclosed form, but includes all modifications, equivalents or substitutes included in the spirit and technical scope of the present invention. In addition, it should be noted that in order to emphasize a clearer description, the shape, size, spacing between elements, etc. of the elements in the drawings may be expressed in a reduced or exaggerated manner.

[0032] The terms used in this application are only used to illustrate specific embodiments and are not intended to limit the present invention. Unless the context clearly indicates otherwise, singular expressions include plural expressions. In this application, it should be understood that terms such as "including" or "having" are intended to specify the presence of features, numbers, steps, operations, components, parts or combinations thereof recorded in the specification, and do not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0033] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as those generally understood by ordinary technicians in the field to which the present invention belongs. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant field, and, unless clearly defined in this application, will not be interpreted in an idealized or overly formal sense.

[0034] When describing the present invention, if it is judged that the relevant well-known functions are obvious to those skilled in the art and may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

[0035] Figure 4 It is an exploded view of a drilling device for soft claw machining for explaining an embodiment of the present invention.

[0036] A plurality of slidable jaw seats 120 are installed on the lathe chuck 100, and soft jaws 110 are provided on the upper part of each jaw seat 120 to fasten the workpiece through the soft jaws 110. A plurality of bolt holes are formed in the upper part of the soft jaws 110, and the stop pins 311 of the jaw stopper 300 are inserted into the bolt holes along the installation and disassembly line 301. At this time, in order to maintain the contact between the jaw stopper 300 and the soft jaws 110, a magnet is included which is inserted and fixed in the jaw stopper 300.

[0037] In Figure 4 In the illustrated embodiment, three jaw stoppers 300 are installed on the three soft jaws 110, and the adjustment plate mounting surface 203 of the drilling adjustment plate 200 is installed on the stopper mounting surface 313 of the installed three jaw stoppers 300. The drilling device for soft jaw processing according to the present invention is a device for processing the soft jaws 110 by installing and fixing the drilling adjustment plate 200 on the stopper mounting surface 313 of the jaw stopper 300.

[0038] Figure 5 For the figure showing the jaw stopper 300, an isometric view, a top view, and a B-B cross-section taken along line B from the cross-section of the top view are shown.

[0039] Referring to Figure 5 、The jaw stopper 300 is formed with a stop pin 311 inserted into the upper bolt hole of the soft jaw 110, and a stopper body 315 is provided on the upper part of the stop pin 311. The stopper body 315 has a stopper mounting surface 313 and a coupling surface 312 on the front, an extension plate portion 314 is formed on the side, and a stop scale 310 is marked on the upper part.

[0040] A stopper mounting surface 313 having a constant area in the direction parallel to the soft jaw 110 is formed on the front of the stopper body 315 for installing the drilling adjustment plate 200.

[0041] In addition, a coupling surface 312 is included on the front of the stopper body 315, which is formed in an inclined shape with an undercut shape and has a spiral shape corresponding to the spiral protruding surface of the drilling adjustment plate. The inclination angle 2 of the coupling surface 312 has an angle less than 90 degrees as shown in the B-B cross-section.

[0042] Figure 6 For the figure showing the anti-disengagement portion 320 on the upper part of the stopper body 315 of the jaw stopper 300.

[0043] In the embodiment, if the inclination angle 1 between the joint surface 312 and the spiral protrusion surface 201 is small or a right angle, the downward pressure is weak, resulting in the detachment of the drilling adjustment plate 200. At this time, in order to prevent the detachment of the drilling adjustment plate 200, an anti-detachment portion 320 is formed on the stopper body 315, and an adjustment scale can be formed on the upper surface of the anti-detachment portion 320 as needed.

[0044] Figure 7 and Figure 8 FIG. shows the drilling adjustment plate 200.

[0045] The drilling adjustment plate 200 has a circular through-hole inside, a spiral protrusion surface 201 is formed at the edge, and an adjustment plate scale 210 is displayed along the spiral protrusion surface 201. The spiral protrusion surface 201 includes an outer surface with the smallest radius and an outer surface with the largest radius from the center of the circular through-hole on both sides, and the spiral shape is such that the radius length increases regularly between the two outer surfaces.

[0046] The outer surface shape of the spiral protrusion surface 201 has the same inclination as the joint surface 312 of the claw stopper 300 and has a contact spiral surface. And on the opposite side of the adjustment plate scale 210, there is an adjustment plate mounting surface 203 that contacts the stopper mounting surface 313 of the claw stopper 300. As shown in the figure, it has 3 spiral protrusion surfaces 201, which is an example of the case where the number of soft jaws 110 configured in the lathe chuck 100 is 3. Therefore, according to the structure of the lathe chuck 100, it has the same number of spiral protrusion surfaces 201 as the number of soft jaws 110.

[0047] Figure 7 FIG. is an example diagram of the state where the adjustment plate mounting surface 203 of the drilling adjustment plate 200 is initially mounted on the stopper mounting surface 313 of the claw stopper 300. When the adjustment plate mounting surface 203 of the drilling adjustment plate 200 is initially mounted on the stopper mounting surface 313 of the claw stopper 300, if it is mounted on the outer surface with the smallest radius of the spiral protrusion surface 201 of the drilling adjustment plate 200, the joint surface 312 and the spiral protrusion surface 201 are mounted at a distance, and the gap between the joint surface 312 and the spiral protrusion surface 201 is such that when the drilling adjustment plate 200 is rotated in the direction where the spiral protrusion surface 201 becomes larger, the joint surface 312 and the spiral protrusion surface 201 come into contact, and as Figure 8 shown, the gap is eliminated.

[0048] Figure 8 FIG. shows the state where the adjustment plate mounting surface 203 of the drilling adjustment plate 200 is mounted on the stopper mounting surface 313 of the claw stopper 300 and the joint surface 312 and the spiral protrusion surface 201 are in contact when the drilling adjustment plate 200 is rotated in the direction where the spiral protrusion surface 201 becomes larger.

[0049] When the connection surface 312 contacts the helical protrusion surface 201, the soft jaw 110 can only move from the center of the lathe chuck 100 towards the edge. Operate the machine with reference to the stop scale 310 to move the soft jaw 110 towards the edge of the lathe chuck 100. When a gap is generated between the connection surface 312 and the helical protrusion surface 201, the drilling adjustment plate 200 can be further rotated to adjust the position of the soft jaw 110.

[0050] When the drilling adjustment plate 200 rotates and the soft jaw 110 is in the appropriate position, if the machine operates to make the soft jaw 110 move towards the center of the lathe chuck 100, the connection surface 312 contacts the helical protrusion surface 201. At this time, the movement of the soft jaw 110 stops, and the preparation for machining the soft jaw 110 is completed.

[0051] Figure 8 (b) is a cross-sectional view showing the cross-section A-A taken along line A of Figure 8 (a). When the drilling adjustment plate 200 is in non-gap contact with the jaw stop 300, the helical protrusion surface 201 and the connection surface 312 are circular arcs with the same diameter, so they are surface contacts and seamless. When the jaw stop 300 comes into strong contact with the adjustment plate 200 due to the operation of the machine, the two contact surfaces, that is, the connection surface 312 and the helical protrusion surface 201, slide due to the inclination angle 1, generating a downward force that makes the adjustment plate mounting surface 203 come into strong contact with the stop mounting surface 313. Due to the downward force generated at this time, even if the lathe chuck 100 rotates at a high speed, the adjustment plate 200 will not fall off.

[0052] The description of the above embodiments is provided to enable those of ordinary skill in the art to utilize or implement the present invention. Various modifications to these embodiments are obvious to those of ordinary skill in the art, and the general principles defined herein can be applied to other embodiments without departing from the scope of the present invention. Therefore, the present invention is not limited to the embodiments disclosed herein, but should be interpreted within the broadest scope consistent with the principles and novel features disclosed herein.

[0053] Industrial applicability

[0054] The present invention is a tool that helps CNC lathe users to conveniently and quickly perform soft jaw machining work when using a CNC lathe, and its practicality is significantly improved.

Claims

1. A drilling device for soft jaw processing, characterized in that, The device is composed of a claw stopper (300) and a drilling adjustment plate (200). The claw stopper (300) has: a stopper pin (311) inserted into the bolt hole of the soft jaw (110); and a stopper body (315) with a stopper mounting surface (313) and a coupling surface (312) formed on the front, and a stopper scale (310) shown on the upper part. The drilling adjustment plate (200) has a circular through-hole inside and a spiral protruding surface (201) formed on the edge, and an adjustment plate scale (210) is shown along the spiral protruding surface (201). The drilling adjustment plate (200) is fixedly installed on the stopper mounting surface (313).

2. A drilling device for soft jaw processing, characterized in that, It is composed of a drilling adjustment plate (200) and a claw stopper (300). The drilling adjustment plate (200) has a spiral protruding surface (201) formed on the edge of a circular plate with a through-hole in the center. The claw stopper (300) is in surface contact with the spiral protruding surface (201) of the drilling adjustment plate (200), and can control the movement of the soft jaw by connecting with the bolt hole of the soft jaw. While maintaining the state of surface contact along the spiral protruding surface (201), the claw stopper (300) moves by the left and right rotation of the drilling adjustment plate (200) to control the movement of the soft jaw.

3. The drilling device for soft jaw processing according to any one of claims 1 to 2, characterized in that, The claw stopper (300) includes a coupling surface (312) with an inclination corresponding to the spiral protruding surface (201), and the inclination angle of the coupling surface (312) is less than 90 degrees.

4. The drilling device for soft jaw processing according to claim 1, characterized in that, An anti-disengagement part (320) for preventing the detachment of the drilling adjustment plate is formed on the upper part of the stopper body (315).

5. The drilling device for soft jaw processing according to any one of claims 1 to 2, characterized in that, The number of claw stoppers (300) is the same as that of the spiral protruding surfaces (201).

6. The drilling device for soft jaw processing according to claim 1, characterized in that, When the drilling adjustment plate (200) is installed on the stopper mounting surface (313) of the claw stopper (300) and the drilling adjustment plate (200) rotates in the direction where the spiral protruding surface (201) becomes larger, the coupling surface (312) contacts the spiral protruding surface (201).

7. The drilling device for soft jaw processing according to any one of claims 1 to 2, characterized in that, The spiral protruding surface (201) includes an outer surface with the smallest radius and an outer surface with the largest radius from the center of the circular through-hole on both sides, and a spiral with a regularly increasing radius length is between the two outer surfaces.

8. The drilling device for soft jaw processing according to claim 1, characterized in that, The stopper pin (311) is fixed by inserting a magnet.

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