JP4718759B2 - Work vise base - Google Patents

Description

  The present invention relates to a vise base used for fixing a workpiece to a table of a machine tool or a workpiece mounting pallet.

  Various work vise for fixing the work to the table or pallet of the machine tool can be used depending on the structure of the machine tool and the shape and material of the work, etc. A fixed base is attached to a fixed base provided at one end of the base to be fixed, a moving base is attached to a moving base that moves along the slide guide on the base by the screwing action of the feed screw, and the fixed base is moved. A structure in which a workpiece is held with a base is common.

  In order to accurately process a workpiece gripped by a vise, the gripping position of the workpiece must be accurate. The gripping height of the workpiece is one of the factors that determine the position of the workpiece, and it is particularly important that the gripping height is accurate when machining the upward surface of the workpiece. The work gripping height can be set to a desired height by providing a work cradle on the vise and gripping the work with the work placed on the work cradle. However, when the work placed on the work cradle is gripped by the fixed base and the moving base, the work sometimes floats from the work cradle.

  For example, as shown in FIG. 8, when the thickness of the workpiece to be gripped is thin, when the work point 63 of the screw rod 23 that propels the moving base 15 is lower than the gripping position 64 of the workpiece and the workpiece 66 is gripped, A moment 65 is generated in the direction of tilting the moving base 15 upward. Due to this moment, the moving base 15 and the moving base 19 holding it are slightly tilted, the moving base 15 moves upward and the work 66 is lifted from the receiving base 67, and the gripping height of the work is increased. The problem of producing an error occurs.

  In order to avoid this problem, there has been proposed a base that generates a component force in a direction of pressing the work downward when the work is gripped. As this type of cap, the structure shown in FIG. 10 is disclosed, for example, in Japanese Utility Model Publication No. 75666 (1994) No. 75666. This structure is composed of a base block 42 and a base block 43 that are slidably contacted with inclined sliding contact surfaces 47 and 51 on the base 15, and a downward component force is applied to the base block 43 by a reaction force F from the work 66. Is caused to press the work against the work cradle 67. When the base is opened, the base block 43 is pulled up by the tension spring 56.

  However, in the base having this structure, when the work is gripped by the upper part of the base, only the upper parts of the inclined sliding contact surfaces 47 and 51 are strongly pressed, so that the base block 43 does not move down smoothly and the work is placed on the cradle 67. There is a disadvantage that it cannot be pressed. Further, in order to make the downward movement smooth, it is necessary to make the gradient of the inclined sliding contact surfaces 47 and 51 about 30 degrees, but if this is done, the thickness of the base 15 will be increased and the distance between the fixed base and the moving base will be increased. There is a drawback that the size of the work that can be gripped is reduced and the size of the work that can be held is reduced.

  Therefore, in order to eliminate the above-mentioned drawbacks, the applicant of the present invention has proposed a base in which the sliding contact surface between the base block and the base block is a multi-stage saw blade in Japanese Patent No. 3100316. As shown in FIG. 9, this base includes a fixed base block 42 and a work-side base block 43, and the front surface of the base block 42 and the back surface of the base block 43 are gripping reaction forces in the horizontal direction from the work. Is added, a multi-step inclined sliding contact surface (pressing surface 47 and lower moving surface 51) in a direction of sliding the base block 43 obliquely downward, and a multi-step contact surface intersecting the inclined sliding contact surface ( It has a sawtooth shape in a side view including a receiving surface 48 and a contact surface 52). The base block 42 and the base block 43 are connected by a connecting bolt 45 so as to be movable up and down while the inclined sliding contact surfaces 47 and 51 are in contact with each other. When the base grips the work, it slides on the inclined sliding contact surfaces 47 and 51 and the base block 43 moves downward to press the work against the cradle 67. An elastic cushioning material 53 is interposed between the contact surfaces 48 and 52, and the base block 43 is moved upward when gripping of the workpiece is released.

Japanese Utility Model Publication No. 6-75666 Japanese Patent No. 3100316

  The present invention aims to improve the die proposed in the above-mentioned Japanese Patent No. 3100316. By this invention, it is possible to remove chips on the inclined sliding contact surfaces 47 and 51 between the base block 42 and the die block 43. Failure to press down the work piece of the base due to the intrusion of dust and a decrease in the durability can be prevented, and it is possible to set the work pressing amount more accurately when gripping, and the work receiver that determines the height of the gripped work piece. It becomes possible to attach the base to the base itself.

  The base of the work vise according to the present invention has, as a prerequisite structure, a multi-stage formed by a plurality of pressing surfaces 47 inclined obliquely downward with respect to a reaction force from the workpiece and a plurality of receiving surfaces 48 intersecting the pressing surfaces. A base block 43 having a multi-stage sawtooth shape formed on the back surface, which is formed by a base block 42 having a sawtooth shape on the front surface, a lower moving surface 51 slidably contacting the pressing surface 47 and a contact surface 52 facing the receiving surface 48. And an elastic material 79 that urges the receiving surface 48 and the contact surface 52 in the separation direction, and fastening means 84 that loosely fastens the base block 42 and the base block 43.

  The work vise base of the present invention includes a work receiving plate 54 for setting the height of the work held by the vise. The work receiving plate 54 is made of a metal plate, and includes an upper edge lower than the upper edge of the base block 43 and a lower edge that slidably contacts the base of the vise, and a bush hole provided in the work receiving plate 54. An attachment screw 59 inserted into a screw insertion hole 58 of an elastic bush 57 fitted to 56 so as to urge the work receiving plate 54 downward is attached to the front surface of the base block 43.

  Since the work vise provided with the work receiving plate 54 having the above structure is supported by the thin receiving plates 54 at both ends of the work, the work receiving plate 54 is used when machining a vertical bolt hole or the like on the work. Is less likely to get in the way. The work receiving plate 54 is in a state where its lower side is in contact with or slidably contacted with the upper surface 3 a of the vise base 3, and the vertical movement of the base block 43 when the work is gripped and released is absorbed by the elasticity of the elastic bushing 57. The lower side of the work receiving plate 54 is always pressed against the upper surface 3a of the base 3, and the height of the upper surface (work receiving surface) 54a of the work receiving plate 54 is always kept constant.

  Further, the base of the work vise of the present invention is for preventing dust and other dust from entering the inclined sliding contact surface 50 formed by the pressing surface 47 of the base block 42 and the lower moving surface 51 of the base block 43. Sealing materials 74 to 74d are provided. This sealing material is fixed and bonded to at least one side of the front surface of the base block 42 and the back surface of the base block 43. Practical seal material mounting structures include a structure in which elastic or rigid seal materials 74a and 74b that are in sliding contact with both sides of one side of the base block and the base block are attached to each other, the front of the base block and the base block A structure in which an elastic sealing material 74 having a multi-stage saw blade shape that contacts the other saw blade shape surface is attached to at least one side of the back surface of the base plate, and at least one of the front surface of the base block and the back surface of the base block A structure in which the elastic sealing material 74d is mounted on both sides of the elastic member and the elastic or rigid sealing material 74c in contact with the elastic sealing material is mounted on the other side of the other side.

  According to the preferable structure of the base of the present invention, as a fastening means for fastening the base block 42 and the base block 43, the base block 42 and the base block are inserted into one of the base block and the through screw hole 75 provided in the other. A connecting bolt 76 is used. A lock screw 77 is screwed into the through screw hole 75 from a direction opposite to the insertion direction of the connecting bolt. The lock screw is pressed against the tip of the connection bolt 76 to fix the connection bolt 76 and close the through screw hole 75 to prevent dust from entering the inclined sliding contact surfaces 47 and 51. Yes.

  The connecting bolt 76 loosely fastens the base block 42 and the base block 43 so that the base block 43 can slightly move up and down along the inclined sliding contact surface 50 (47, 51) with respect to the base block 42. . By adjusting the degree of looseness according to the position of the lock screw, it is possible to adjust so that the receiving surface 48 of the base block and the contact surface 52 of the base block are just in contact with each other when the work is gripped. As a result, the gripped work is pressed against the cradle and tilting of the base block 43 is completely avoided, so that the work can be gripped in a more accurate posture.

  It is convenient to allow the base 9 and 19 to be attached and detached with the base block 42 and the base block 43 being connected by the connecting bolt 76.

  In this case, the base block 42 is provided with a fixing bolt hole 80 through which a bolt for fixing the base to the bases 9 and 19 is inserted, and the base block 43 is provided with a driver insertion hole 82 comprising a through screw hole on the same axis as the fixing bolt hole. If the structure of providing is provided, the fixing bolt 81 inserted through the fixing bolt insertion hole 80 can be turned with a screwdriver inserted through the driver insertion hole 82, and the base can be attached and detached. By making the driver insertion hole 82 a screw hole, a blind screw 83 can be screwed into the driver insertion hole 82 to prevent dust from entering the inclined sliding surface 50. Further, the work receiving plate 54 described above can be attached using this screw hole.

The side view which shows the example of the work vise which equipped the nozzle | cap | die of this invention Front view of work vise in FIG. Side view of the embodiment of the base of the present invention Front view of the base of FIG. Plan view of the base of FIG. The perspective view which shows the seal structure of the inclined sliding contact surface of the nozzle | cap | die of FIG. The perspective view which showed the other example of the seal structure which can be used instead of the seal structure of FIG. Side view showing an example of a work vise with a conventional base attached Explanatory drawing showing an example of a base having a conventional structure Explanatory drawing which shows the other example of the nozzle | cap | die of a conventional structure

  The work vise shown in FIG. 1 and FIG. 2 includes an elongated base 3 having a substantially rectangular cross section, and the upper surface 3a of the base is finished to an accurate height, Guide grooves 6 and 6 extending in the direction are provided. At one end of the base 3, a fixing base 9 is positioned with a key 8 and fixed with bolts 11. A fixing base 12 is fixed to the fixing base 9 with fixing bolts 13. The moving base 15 facing the fixed base 12 is fixed by a fixing bolt 81 to the second moving base 19 slidably guided in the guide groove 6. The first moving table 18 is slidably guided in the guide groove 6 adjacent to the second moving table 19 on the side opposite to the fixed table. On the side surface of the base 3, knock holes 17 having a center near the lower side of the guide groove 6 are provided at a constant pitch along the guide groove 6. The depth of the knock hole 17 is deeper than the depth of the guide groove 6.

  A receiving portion 18a extending toward the second moving table is integrally formed at the lower portion of the first moving table 18 on the second moving table side. Further, a convex portion 19 a extending toward the first moving table is integrally formed on the upper portion of the second moving table 19 on the first moving table side. The upper surface of the receiving portion 18a and the lower surface of the convex portion 19a are in surface contact with each other to form a slide surface 20 parallel to the guide groove 6.

  A screw rod 23 is rotatably supported on the first moving table 18. The screw rod 23 is not movable in the axial direction by the flange 21 and the collar 22 located on both sides of the first moving table 18. A knock pin 29 that fits into the knock hole 17 of the base is mounted on the first moving base 18 so as to be able to protrude and retract inward. A shallow groove 31 in the axial direction is provided on the peripheral surface of the knock pin 29, and the tip of a set screw 32 attached to the first moving base 18 is engaged with the groove 31 to prevent the knock pin from falling off. Yes.

  The second movable body base 19 includes a female screw portion 33 that is screwed with a screw rod 23 that is pivotally supported by the first movable base 18, and a cap side of the female screw portion 33 is a counterbore hole 36. The screw rod 23 protrudes from the female screw portion into the counterbore hole 36, and a washer 37 for preventing the screw rod 23 from coming off from the female screw portion 33 is fixed to the tip of the screw rod 23.

  When the workpiece is gripped by the work vise 1, the workpiece is placed on the upper surface 3 a of the base 3 or the workpiece receiving platform placed thereon, and the moving base 15 is brought close to the fixed base 12 and the knock pin 29 is inserted into the nearest knock hole 17. To fix the first moving base 18. Next, the screw rod 23 is turned to advance the second moving table 19, and the work is gripped by the moving base 15 and the fixed base 12. The reaction force that acts on the moving base when the work is clamped acts to tilt the second moving table 19 toward the first moving claw, but this tilting can also be received by the slide surface 20, so the second moving table 19 Even if the width in the sliding direction is reduced, the tilt angle of the second moving base can be reduced, and a compact and highly rigid vise can be obtained.

  3 to 6 (FIG. 3 is a side view, FIG. 4 is a cross-sectional plan view, FIG. 5 is a front view, and FIG. 6 is a perspective view of a seal portion of an inclined sliding contact surface). . The base 15 is formed of a base block 42 fixed to the second moving base 19 and a base block 43 on the work side. The front surface of the base block 42 has a multi-step sawtooth shape, and a plurality (seven in the figure) of oblique pressing surfaces 47 and a plurality (six in the illustration) of receptacles orthogonal to the pressing surface 47. Surface 48. The back surface of the base block 43 has a sawtooth shape facing the front surface of the base block, and includes a lower moving surface 51 slidably contacting the pressing surface 47 and a contact surface 52 facing the receiving surface 48.

  Sealing material 7 for closing the space between the front surface and the back surface is bonded to at least one side of the front surface of the base block 42 and the back surface of the base block 43. FIG. The seal material is mounted on both sides of the saw blade shape of the base block and the saw blade shape of the base block, and comes into contact with the surface of the other saw blade shape. It is an example of the elastic sealing material 7 provided with a multi-stage saw blade shape that is larger by an amount.

  As shown in FIG. 6, L-shaped notches 73 deeper than the depth of the saw-tooth shaped blade on the back surface are formed along both sides of the back surface of the base block 43. An elastic sealing material 74 made of polyurethane having a saw blade shape slightly higher in height than the saw blade shape of the base block 43 is attached to the notch 73. Surfaces 71a and 71b corresponding to the lower moving surface 51 and the contact surface 52 of the saw blade shape of the elastic seal material 74 slightly protrude from the base block, and the base blade and the saw blade shape of the base block are brought into contact with each other. At this time, the slight protrusion is used as a tightening margin, and the surfaces 71a and 71b of the elastic sealing material 74 having the saw blade shape are elastically pressed to both sides of the pressing surface 47 and the receiving surface 48 of the base block.

  A shallow concave portion 78 is formed in the central portion of the uppermost and lowermost receiving surfaces 48 of the base block 42, and a thin strip-shaped spring belt plate 79 bent into a waveform is accommodated in the concave portion 78. The spring band plate 79 urges the contact surface 42 facing the receiving surface 48 upward, and applies an urging force in a direction separating the receiving surface 48 and the contact surface 52. The depth of the concave portion 78 is deeper than the plate thickness of the spring band plate 79. Therefore, when the contact surface 52 pushes the spring band plate 79, the contact surface 52 and the receiving surface 48 come into surface contact.

  A connecting bolt insertion hole 72 passes through the center of the base block 42, and a through screw hole 75 is provided at a position facing the base block 43. The connecting bolt 76 passes through the connecting bolt insertion hole 72 and is screwed into the through screw hole 75, and the tip thereof is pressed against a lock screw 77 screwed into the through screw hole 75. The connecting bolt 76 and the lock screw 77 are pressed against the threaded surface of the through screw hole 75 by the press-contacting of the tips constituting the fastening means 84 to prevent loosening. In this state, the connecting bolt 76 fastens the base block 42 and the base block 43 so that the base block 43 can move up and down slightly along the pressing surface 47 of the base block. By adjusting the fastening force of the connecting bolt, the amount of play of the base block 43 can be adjusted, and the amount of downward movement of the base block 43 when a workpiece is gripped can be adjusted.

  A connecting bolt insertion hole 72 passes through the center of the base block 42, and a through screw hole 75 is provided at a position facing the base block 43.

  The base block 42 is fixed to the base 19 by fixing bolts 81 inserted through fixing bolt insertion holes 80 arranged on both sides of the connecting bolt insertion hole 72. A driver insertion hole 82 is provided at a position facing the fixing bolt insertion hole 80 of the base block 43, and the base 15 is attached and detached by rotating the fixing bolt 81 with a driver inserted through the driver insertion hole. . The driver insertion hole 82 is a female screw hole, and after fixing the base 15 to the base 19, a blind screw 83 is screwed into the driver insertion hole, so that dust such as chips is generated between the base block 42 and the base block 43. Prevent intrusion. In the illustrated embodiment, a screw hole 55 having a small diameter is provided below the driver insertion hole 82. The driver insertion hole 82 and the small-diameter screw hole 55 can be used to attach the work receiving plate 54 to the base block 43.

  FIG. 3 is a view showing a base with a workpiece receiving plate of the present invention. The work receiving plate 54 is an iron plate having a thickness of about 3 mm. A bush hole 60 is provided at a position slightly above the position corresponding to the small-diameter screw hole 55 of the base block, and the bush hole is made of polyurethane. An elastic bush 57 is fixed by adhering the outer periphery thereof. The elastic bush 57 is provided with a mounting screw insertion hole 58 at the center thereof. The work receiving plate 54 is mounted by screwing an attachment screw 59 inserted into the attachment screw insertion hole 58 into a small-diameter screw hole 55 of the base block. In this mounted state, the upper surface 54a serving as a workpiece receiving surface of the workpiece receiving plate 54 is at a position lower than the upper edge of the base block 43, and the lower edge of the workpiece receiving plate projects downward from the lower edge of the base block. Yes.

  When the base with work receiving plate formed as described above is fixed to the base 19, the lower edge of the work receiving plate 54 is applied to the upper surface 3 a of the base 3 by an urging force generated by the elastic deformation of the elastic bush 57 in the vertical direction. The receiving surface 54a of the work receiving plate is held at a certain height by being pressed. The slight vertical movement of the base block 43 when the work is gripped and released is absorbed by the elastic deformation of the elastic bush 57 in the vertical direction, and the position of the receiving surface 54a of the work receiving plate does not change.

  When the workpiece is gripped by the vise equipped with the base of the present invention, the base block 43 slightly slides downward along the pressing surface by the reaction force from the workpiece acting on the base block 43 when the workpiece is gripped. . Thus, the lift of the second movable table 19 when a moment 65 as shown in FIG. 8 is applied can be absorbed, and the workpiece is mounted on the workpiece receiving plate 54 or the workpiece receiving table 67 mounted on the vise base. It is possible to increase the positioning accuracy of the workpiece.

  FIG. 7 shows another example of the sealing material for closing the space between the front surface of the base block 42 and the back surface of the base block 43. FIGS. 7A and 7B show examples of a rigid sealing material that is mounted on one side of the base block 42 and the base block 43 and is in sliding contact with the other side.

  In the example of FIG. 7A, sealing materials 74 a made of a plate-like metal material projecting toward the base block 43 are fixed to both side surfaces of the base block 42 with screws 85. Both side surfaces of the base block 42 and the base block 43 are ground and finished in a state where both are combined. By fixing the sealing material 71 after grinding, the inner surface of the sealing material 71 and the side surface of the base block 43 are separated. It adheres slidably and prevents dust such as chips from entering between the base block 42 and the base block 43. 7B is an example in which a base block 43 is provided in the center of the front surface of the base block 42, and auxiliary base blocks 74b are fixed on both sides thereof by bolts 86. The inner side surface of the auxiliary base block 74b is the base. The seal material is slidably adhered to both side surfaces of the block 43. In this example, since the auxiliary base block 74b is in a fixed state, the work is pressed and gripped downward by the central base block 43, and finally the auxiliary base block with both sides of the work fixed. Since it is gripped by 74b, it is useful as a structure that can be adopted when it is desired to increase the gripping accuracy of the workpiece.

  FIG. 7 (c) shows an elastic sealing material mounted on one side of the front surface of the base block and the back surface of the base block, and a rigid sealing material mounted on the other side and contacting the elastic sealing material. The example which consists of a pair of is shown. Notches 73 similar to those described in FIG. 6 are formed on both sides of the front surface of the base block 42 and the back surface of the base block 43, and a long and narrow rectangular metal seal 74c is formed in the notch on the side of the base block 42. Is fixed, and an elastic sealing material 74d made of an elongated rectangular parallelepiped polyurethane resin or the like is fixed to the notch on the base block 43 side. The opposing surfaces of the metal sealing material 74c and the elastic sealing material 74d are in surface contact, preventing dust from entering between the front surface of the base block 42 and the back surface of the base block 43, and elastic deformation of the elastic sealing material 74d. Thus, the base block 43 can be moved downward when the workpiece is gripped.

  According to the die of the present invention, the workpiece can be gripped with high positional accuracy, and the machining accuracy of the workpiece can be increased. In particular, when a thin workpiece is gripped by the upper part of the base, it is effective to prevent the workpiece from being lifted due to the moving base moving upward due to the gripping reaction force of the workpiece. Therefore, the base of the present invention is particularly effective as a base attached to a small vise for processing a relatively small workpiece, and a workpiece having a small thickness is gripped by the workpiece vise and the upward surface thereof is processed. When performing, it is possible to achieve high machining accuracy that cannot be achieved with conventional devices.

  Furthermore, the base of the present invention can effectively prevent chips and other dust from entering between the base block that moves slightly up and down as the work is gripped and released and the fixed base block, and grip the work. In this state, the amount of play of the base block can be adjusted so that the receiving surface of the base block and the contact surface of the base block come into contact with each other. This prevents tilting of the base block 43, so that the workpiece can be gripped more accurately. is there.

  Moreover, the base with a work receiving plate of the present invention can define the height of the work at both end portions close to the base, and the work receiving plate is less likely to get in the way when machining a through hole or the like in the work. . Therefore, the base of the present invention can be widely used as a base attached to a small vise.

DESCRIPTION OF SYMBOLS 3 Vise base 6 Guide groove provided in vise base 15 Moving base 17 Knock hole for fixing first moving base 18 First moving base 19 Second moving base 42 Moving base block 43 Base block 47 base block 48 Receiving surface 51 Removing surface of base block 52 Contact surface 54 Work receiving plate 56 Bush hole provided in work receiving plate 57 Elastic bushing for biasing work receiving plate 59 Work receiving plate mounting screw 74- 74d Seal material 76 Fastening bolt that fastens the base block and the base block 77 Lock screw 79 Elastic material that urges the receiving surface and the contact surface in the separating direction 81 Fixing bolt that fixes the base 82 Driver insertion hole 83 Driver insertion hole 83 Screwed blind screw

Claims (7)

A base block provided with a multi-step sawtooth shape on the front surface formed by a plurality of pressing surfaces (47) inclined obliquely downward with respect to the reaction force from the workpiece and a plurality of receiving surfaces (48) intersecting the pressing surfaces (42) and a lower block (51) slidingly contacting the pressing surface (47) and a contact surface (52) facing the receiving surface (48), and a base block provided with a multi-stage sawtooth shape on the back surface ( 43), an elastic material (79) urging the receiving surface (48) and the contact surface (52) in the separating direction, and a fastening means for loosely fastening the base block (42) and the base block (43) ( 84)
A sealing material (74 to 74d) for closing a space between the front surface of the base block and the back surface of the base block is bonded to both sides of at least one of the front surface and the back surface, and mounting screws (59) are attached to the front surface of the base block. The workpiece receiving plate (54) is mounted, and the mounting screw is inserted into the mounting screw insertion hole (58) of the elastic bush (57) fitted in the bush hole (56) provided in the workpiece receiving plate, and the base The work receiving plate has a lower edge that is slidably urged against the vise base by the elasticity of the elastic bush and an upper edge that is lower than the upper edge of the base block (43). A base for work vice , which is a metal plate provided .   The work vise according to claim 1, wherein the sealing material is an elastic or rigid sealing material (74a, 74b) that is mounted on one side of the base block and the base block and is in sliding contact with the other side surface. No mouthpiece.   The sealing material is mounted on at least one side of the saw blade shape of the base block and the saw blade shape of the base block and abuts against the surface of the other saw blade shape. The work vise base according to claim 1, which is an elastic sealing material (74) having a multi-stage saw blade shape.   The sealing material is an elastic seal material (74d) mounted on at least one side of the front surface of the base block and the back surface of the base block, and elastic or attached to the other side and the elastic seal material The work vise base according to claim 1, which is a pair with a rigid sealing material (74c).   The base according to claim 1, 2, 3, or 4, wherein the elastic material (79) is an elastic metal strip bent into a corrugated or continuous twist shape.   The fastening means (84) is a connecting bolt (76) that passes through one of the base block (42) and the base block (43) and is screwed into a through screw hole (75) provided on the other, The base according to claim 1, 2, 3, or 4, wherein a lock screw (77) for fixing the connection bolt to the through screw hole is screwed together.   A fixing bolt hole (80) provided in the base block (42) for inserting a fixing bolt for fixing the base block (42) to the base (9, 19), and a cap block on the same axis as the fixing bolt hole The base according to claim 1, 2, 3 or 4, further comprising a driver insertion hole (82) penetrating (43), wherein the driver insertion hole is a screw hole.

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