WO2013162083A1

WO2013162083A1 - Pad for a vise

Info

Publication number: WO2013162083A1
Application number: PCT/KR2012/003108
Authority: WO
Inventors: 장만성
Original assignee: Jang Man-Sung
Priority date: 2012-04-23
Filing date: 2012-04-23
Publication date: 2013-10-31

Abstract

The present invention provides a pad for a vise capable of quickly and stably fixing a work and improving working precision by minimizing the work-grabbing error, wherein an outer member contacting an anvil or a spindle pairs up with an inner member contacting a side of the work with cam grooves formed in the opposed surfaces of the outer and the inner member, and the outer member is loosely fastened to the inner member by a bolt with a wedge rod inserted into the cam groove so that the inner member is moveable towards the outer member by the gap between the cam grooves and wedge rod. The outer member disposed in front of and contacting the anvil or a set of spindles pairs up with the inner member contacting a side of the work with a plurality of transverse cam grooves shaped like inequality sign "<" or ">" in the opposed surfaces of the inner and the outer member. The angle of each of the cam grooves is made to have 110~120°, so that the number of tangent points of the wedge rod to the inner member becomes two, and thus the total four tangent points of both sides fix the work so as to eliminate the mobility of the wedge rod in the cam grooves, thereby quickly and properly stabilizing the fixing of the work and processing the work at high precision.

Description

Vise pad

The present invention is a pair of the inner material in front of the jaw of the anvil or the spindle and the inner material in contact with the side of the workpiece is coupled to the spindle in the state where the wedge is inserted into the cam groove formed side by side up and down of the surface facing the inner material and the outer material When twisted and tightened, the present invention relates to a vice pad that can quickly fix a workpiece and drastically reduce machining errors.

A typical vise consists of an anvil with a jaw attached to the front and a spindle with a jaw symmetrical to the jaw attached to the front, a screw rod for retracting the spindle, and a bed. When the workpiece is fixed to the vise and fixed, the clamping state of the spindle may come into contact with the outer surface of the workpiece, causing the workpiece to become unstable.

This phenomenon is caused by the clearance between the female thread on the spindle and the male thread on the threaded side of the spindle. If the fixed state of the workpiece is unstable, it is obvious that the machining precision will be reduced. In order to increase the machining accuracy of the workpiece, it is important to fix the workpiece to the vice exactly.

Usually, when fixing a workpiece to a vise, it is tightened while checking whether or not the jaw can be brought into close contact with the outer surface of the workpiece before the spindle is tightened. If that doesn't work, you can use a hammer to cook the spindle side jaws so that the jaws are tight against the outside of the workpiece. However, this method is inconvenient to fix the work and the long machining time per work, especially under the mass production system to produce a plurality of workpieces of the same standard with the same processing type and processing position, the productivity is low.

A proposal to solve this problem is patent 820166. This prior art is shown in Figure 1, the flat steel inner material of Figure 2 in which the horizontal cam groove (21a, 11a) is formed in parallel to the opposite position above and below the surface (S) and the surface they face each other in the anvil (not shown) The pad (P) is inserted between the horizontal cam groove (21a.11a) and the horizontal cam groove (21a.11a) facing from the outer member 11, and the workpiece (W) between the inner material of both pads is extended. After tightening, the screw rod 40 of FIG. 3 is twisted in the tightening direction (d2) to move the spindle (S) horizontally toward the anvil to tighten the workpiece (W) while tightening while the outer material of each pad is in close contact with the tip of the anvil or spindle. Development The clamping pressure which is fixed and fixed to each external material is transmitted to the internal material through the wedge bar. At this time, the inner material is finely moved in the diagonal direction (d1) by the wedge rod, and then stops fine movement and firmly bites the workpiece when the tightening pressure reaches the maximum.

The stopper screw 52 is fastened to the screw hole 51 penetrating the outer member 20 laterally to limit the return width of the inner member 10 to the outer member 20. If the stopper screw 52 does not adjust the return width of the inner member 10, it is difficult to shorten the machining error of the workpiece when the spindle is bitten or released.

When the pad is loaded in the vise, the workpiece is bitten and the spindle is retracted after finishing the processing of the desired bar. The inner material is immediately lowered and returned by gravity to widen the space between the inner pads of both pads, thereby making it easier to lift the workpiece. Reload the workpiece and continue machining with vise.

Sometimes problems arise. Due to the metal sticking phenomenon that occurs temporarily between the wedge rod and the cam groove, which is caused by the large amount of pressure required to hold the workpiece or when the workpiece is strongly held, the inner material moved diagonally to the wedge and the wedge rod is attached to the cam groove of the outer material. In spite of the gravity, the internals and the wedges did not return immediately but had to be artificially returned. This is inconvenient for workpiece machining on the vise. The return spring 60 is mounted on the spring seat 24 to assist the self-return of the inner material.

In addition, in the cam groove, if the contact wear between the wedge rod and the cam groove is abnormally worn due to the extremely limited activity of the wedge rod, the adhesive phenomenon is prominent when the lubricant is injected between the cam groove and the wedge rod. Whatever the cause, the sticking phenomenon between the cam groove and the wedge rod needs to be improved because it eventually leads to a decrease in the function of the pad and a fixing ability of the workpiece.

On the other hand, the common features of the vice pad of patent No. 820166, which is a built-in cam groove wedge rod, and the pad of Patent No. 1062203, which replaces the wedge rod with a bearing, and the pad of Patent No. 1062892 having a quick return means of the wedge rod and the inner material are the central part of the cam groove. Is an arc-shaped groove whose radius is larger than the outer diameter of the wedge bar. The radial difference between the cam groove and the wedge bar is the result of precision machining because it is not constant such as the workpiece is strongly bited or loosely bited according to the skill of the operator when the spindle is pushed forward to bite the workpiece placed between the anvils.

In addition, since the wedge bar has only two circumferential points on the cam groove, when the wedge bar and the inner material move and the flow width of the wedge bar is large, it is difficult to fix the work quickly, and it is a factor that increases the bite error of the workpiece against the vise. Components that require at least high precision, such as aircraft, combat, missiles, spacecraft, rockets, ships, intercontinental ballistic missiles and space shuttles, cannot be machined with precise dimensions within tolerances.

The present invention is a pair of the outer material in contact with the anvil or the spindle and the inner material in contact with the side of the workpiece is paired with the wedge rod inserted between the cam groove formed on the surface facing the inner material and the outer material loosely tightened by the bolt to the outside A vice pad that allows the inner material to flow between the cam groove and the wedge to correspond to a given allowance for the material, which can improve the processing precision by fast and stable fixation of the workpiece and minimization of workpiece bite errors. It is to provide a vise pad.

A plurality of lateral cam grooves formed on a surface where the inner material and the outer material face each other are paired with the contacting outer material placed in front of the jaw of the anvil or the spindle, and the angle of the inner material and the outer material is formed in the shape of < Is 110-120 °, so that the external points of the wedge rods per inner material are two, and fixing the workpiece by the four external points of both sides combined together removes the fluidity of the wedge rod in the cam groove, thereby quickly and accurately fixing the workpiece stably. In this way, the workpiece can also be achieved with a vise pad that allows machining with high precision.

There is no flow of the inner material to the outer material as the four wedge rods are simultaneously circumscribed in the angled cam grooves of the inner pad and outer material of the pad to face the inner material in front of the anvil and spindle. Therefore, the workpiece can be securely fixed stably and the machining precision can be increased. The workpiece can be fixed quickly and accurately.

The firm, quick and accurate fixation of the workpiece facilitates the work of the vise pad by eliminating the stopper screw that limits the movement of the internal material.

Figure 1 is an illustration of a vise pad consisting of a wedge rod in the inner material and the outer material and the wedge rods conventional wedge rod-lateral cam groove

2 is an illustration of the inner material

Figure 3 is a working example of the pad is omitted, a part of the pad with a tightening screw for limiting the width of the inner material and the return spring for the inner material is omitted

4 is a partially enlarged view of a pad according to the present invention;

5 is a state in which the assembled pad bites the workpiece between the jaw of the anvil (not shown) by moving the loaded spindle;

A first preferred embodiment of the present invention is an inner material having a horizontal cam groove and an inner member fastening hole formed side by side on the upper and lower sides of the outer surface, and a bolt hole corresponding to the fastening hole of the horizontal cam groove and the inner material corresponding to the horizontal cam groove on the outer surface. As a vise pad made of an inner material having a cam, the cam groove is a vise pad made of a cam groove with an angled obtuse angle.

As an additional invention, the groove angle of the cam groove is limited to 100 to 120 ° to prevent damage on the dimensional excess of the wedge rod and the cam groove, and the cam groove is selected from angled bones and curved bones having a radius of curvature less than the radius of the wedge rods.

In Fig. 2, the inner member 20 of the vise pad has a horizontal cam groove 21a formed on the upper and lower inner surfaces thereof, and a fastening hole 22 for the external member is perforated near the long side edge. Given to the plate of the plate surface is a spring seat 24 for the return spring which will quickly return the inner material 20 which has been slid in the diagonal direction when the workpiece is bitten. Although not shown, the outer material is symmetrical with the inner material except that the bolt hole by fastening the bolt to the fastening hole 22 is drilled at the fastening hole 22 and the position thereof.

In Fig. 3, the inner material 20 is a precision machined cuboid or a cuboid thick steel plate that is tightly fixed to the side of the work instead of the jaw of the vise, the outer side of the plurality of horizontal cam grooves with a constant height difference up and down ( 21 is formed, and a plurality of fastening holes 22 are drilled in the empty space between the upper and lower horizontal cam grooves 21 for external materials.

The lateral cam groove 21 is to apply a cam pressure to the wedge bar 30 so that the inner material 20 is tightly fixed to the side of the work (W) while moving finely (d1) in the diagonal direction.

The fastening hole 22 is to fasten the inner material 20 to the outer material 10 with the bolt 60 so as to be maintained in an assembled state, near the edge of the inner material 10 that does not infringe the cam groove 21. Perforated

The outer material 10 is supported while the inner material 20 is finely moved up and down (d1) when fixing the workpiece in close contact with the jaw of the anvil and the spindle, and is processed in the same precision as the inner material 20. Or a rectangular parallelepiped thick steel plate, a horizontal cam groove (11a) corresponding to the horizontal cam groove (21a) is formed on the surface facing the inner material 20, the fastening hole 22 in the empty space between the horizontal cam groove (11a) ) And the center of the bolt hole 12 is punctured.

The horizontal cam groove 11a applies the cam pressure to the wedge rod 30 when tightened with the spindle similarly to the horizontal cam groove 21a to induce the inner material 20 to move in a diagonal direction so as to closely adhere to the side of the workpiece.

The bolt 60 is inserted into the bolt hole 12 side of the inner material 10 to be fastened to the fastening hole 22 of the outer material 20 to maintain the assembled state of the pad, and does not intrude into the horizontal cam groove 11a. Perforate to penetrate the plate surface in the same position as the fastening hole 22 within the range.

The wedge bar 30 may be sandwiched between the

horizontal cam grooves

21a and 11a facing from the inner material 20 and the outer material 10 so that the inner material 20 may be moved in a diagonal direction based on the outer material 10. As a mandrel to help it, it is a round bar and the thickness of the inner surface 20 and the outer surface of the outer material 10 does not touch each other, regardless of where the wedge bar 30 stays in the

horizontal cam grooves

21a and 11a. Has

The bolt 60 has the inner material 20 corresponding to the clearance given between the lead and the fastening hole 22 when the workpiece is bited between the pads while maintaining the engagement state between the inner material 20 and the outer material 10. ) Can be moved diagonally, and releasing the bite pressure on the workpiece helps the inner material 20 to return to its original position.

The inner cam 20 and the outer cam 10 face each other so that the

cam cams

21a and 11a face each other, and the wedge bars 30 are inserted between the

cam cam grooves

21a and 11a, respectively, and then the bolt ball 12 and the fastening hole are provided. When the center of the (22) is matched and the bolt 60 is fitted in the fastening hole 22 to be fastened to the bolt hole 12, the vise pad is assembled in a loose shape.

Each wedge 30 is deeply locked into the

horizontal cam grooves

21a and 11a. At this time, the circumferential point of the wedge bar 30 is two in the inner material, two places in the outer material are all four. Compared with the conventional two-contact method, the stability in the

lateral cam grooves

21a and 11a is much higher, so that the posture of the workpiece bitten by the vise is stabilized, especially since the wedge of the oxime surface can not be moved.

The main aspect of the present invention is that the

cam grooves

21 and 11 given from the inner material 10 and the outer material 20 are obtuse and angled. The

cam grooves

21 and 11 are vertically symmetrical and obtuse. The groove angle of the cam groove is preferably 110 to 120 degrees. The closer the angle of the

cam grooves

21 and 11 to 90 °, the larger the width of the pad to be assembled is necessary, and thus the volume becomes larger, and the distance between the contacts in the

cam grooves

21 and 11 of the inner material and the outer material is shorter. If it is tightened and tightened more than the specified pressure, the wedge bar 30 may flow in the

cam grooves

21 and 11 and may cause damage to stability by simultaneous four-point circumference. When the angle of the

lateral cam grooves

21 and 11 exceeds 120 °, the depth of the

lateral cam grooves

21 and 11 is lower than the thickness of the wedge rod 30 so that the pad volume after the wedge 30 is charged is too large. Considering that the wedge bar 30 should be designed to be thinner, because the diameter reduction of the wedge bar 30 is accompanied by a change in the depth of the horizontal cam groove (21, 11) design and processing difficulties follow.

4 is assuming that the outer material 20 is placed in front of the spindle (not shown) and the workpiece W is placed between the inner material of the anvil side jaws or other pads in front of it. , The inner material 10 was opened by the weight of the wedge 30.

In this situation, when the spindle S is pushed in the direction of the arrow D2, the wedge bar 30 staying on the

lower surfaces

24 and 14 of the

cam grooves

21 and 11 is pushed up by the pressure and at some point the wedge bar 30 is raised. The upper half of the lateral cam groove 21 is circumscribed one by one at the same time to the upper surface 23 of the lateral cam groove 21 and the upper surface 13 of the lateral cam groove 11 simultaneously, and the lower half of the wedge bar 30 is the lower straight surface of the horizontal cam groove 21. The outer surface 14 of the 24 and the horizontal cam groove 11 are simultaneously circumscribed one by one. The wedge bar 30 is circumscribed simultaneously with the upper and

lower surfaces

13 and 23 and the lower and

upper surfaces

14 and 24 to form a four-point circumference. Nevertheless, the angled bone (15, 25) is a wedge bar (30) does not contact at all and remains empty space to help the four simultaneous circumference as described above.

As such, when the wedge rod 30 is circumscribed four points in the

lateral cam grooves

21 and 11 given to the inner member 20 and the outer member 20, the two

cam grooves

21 and 11 are different from each other. The wedge bar 30, which is tightly trapped in and prevented from being stuck, does not change any position even if the spindle is tightened with a force greater than that, and the willing force of the inner material 10 with respect to the wedge bar 30 is firm. Due to these two points, the workpiece can be fixed quickly and stably, and after the workpiece is fixed, the workpiece is held in a stable state so that no hard or tight movement of the spindle contributes to the improvement of precision machining quality with minimal machining error. Will be.

Machine Tool Vise

Patent number 0820166

Patent number 1052203

Patent number 1062892

Claims

Fastening the inner member 20 having the horizontal cam groove 21a and the inner member fastening hole 22 formed side by side on the upper and lower sides of the outer surface, and the horizontal cam groove 11a and the inner member fastening corresponding to the horizontal cam groove 21a on the outer surface. A vise pad made of an inner material (20) having a bolt ball (12) corresponding to a ball, wherein the cam groove is a cam groove (21, 11) in an angled <
The vise pad according to claim 1, wherein the groove angle of the cam grooves (21, 11) is 100 to 120 degrees.
2. Vise pad according to claim 1, wherein the cam groove (21, 11) comprises angled valleys (25, 15).
Vise pad according to claim 1, wherein the grooves (25, 15) of the cam grooves (21, 11) are curved valleys (25a, 15a) with a radius of curvature less than the radius of the wedge bar (30).