JP5271519B2 - Profile hole polishing equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To automatically polish an internal peripheral surface of a variant hole of a metal working die. <P>SOLUTION: An internal peripheral surface of an approach section is polished by moving up and down a polishing jig 19 by pouring a polishing agent while pushing force is applied between the internal peripheral surface of the approach section and a polishing section of the polishing jig 19 by applying side pressure on the die 2 having the approach section being the tapered variant hole from the outside. Then, the direction of the side pressure applied on the die 2 is successively moved in the peripheral direction, and the whole internal peripheral surface of the approach section of the die 2 is polished. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a modified hole polishing apparatus for polishing a deformed hole of a metal processing mold such as a die used for wire drawing of a deformed metal wire rod.

As a method of polishing the inner peripheral surface of a die (drawing die) used for wire drawing of a metal wire rod, a rod-shaped polishing portion of a polishing jig is inserted into the die and rotated by rotating the die or the polishing jig. 2. Description of the Related Art Conventionally, a polishing jig is moved up and down while changing a polishing position in a direction, and a polishing portion is pressed against an inner peripheral surface of a die for polishing (see, for example, Patent Document 1). However, the dies that can be polished by rotating the dies or the polishing jig to change the polishing position in the circumferential direction are used for drawing a metal wire having a round cross section (so-called round wire). In the case of a die (so-called deformed die) used for wire drawing of a metal wire rod having a circular shape or other deformed shape (so-called deformed wire), since the hole has a deformed shape, The die or polishing jig cannot be rotated. For this reason, the polishing of the odd-shaped dies has conventionally been impossible to automate and must be performed manually.For example, when polishing the approach portion of the odd-shaped die, the polishing portion of the same deformed shape having the same taper angle as the approach portion. Insert a polishing jig with a tip into the approach section, pass the polishing agent (slurry), press the polishing jig against the inner surface of the approach section by hand, polish it by rubbing up and down, and move the polishing position to the circumferential method in order to move the entire inner circumference. It was done by polishing the surface.
Japanese Patent Laid-Open No. 7-24719

  As described above, the polishing of the odd-shaped dies cannot be automated and is performed manually, which requires skill, takes time, causes variations in the finished state, and makes it difficult to obtain accurate shapes and dimensions. There was a problem. These problems are not limited to dies, and are common problems with metal working molds having irregularly shaped holes.

  An object of the present invention is to solve the above-mentioned problems and to provide a modified hole polishing apparatus capable of automating polishing of the inner peripheral surface of a deformed hole of a metal processing mold.

The modified hole polishing apparatus of the present invention is an automatic polishing of the inner peripheral surface of a hole having a deformed shape of a metal processing mold, a workpiece holding means for holding a metal processing mold to be polished in a predetermined position, and a cross section A polishing jig having a rod-shaped polishing part that is similar to the three-dimensional shape of an odd-shaped hole of a metal processing mold and that can be inserted into the hole, and holding the polishing jig and holding the polishing part by a work holding means A polishing jig driving means for reversibly driving the irregularly shaped hole in the axial direction of the irregularly shaped hole without being rotated by being inserted into the irregularly shaped hole of the metal working mold, and held by a work holding means Side pressure load means for applying side pressure to the metal processing mold from the outside so as to press the inner peripheral surface of the irregularly shaped hole of the metal processing mold that does not rotate against the polishing part of the polishing jig, and the side pressure load means are rotated by a motor. Rotating together with the driven timing pulley More, a lateral pressure direction varying means for varying the direction of pressing the polishing section an inner circumferential surface of the irregular shape of the holes over the lateral pressure by lateral pressure load means in the circumferential direction of the irregular shape of the hole, the lateral pressure load means By applying lateral pressure to the metal processing mold from the outside and applying a pressing force between the inner peripheral surface of the irregularly shaped hole and the grinding part of the grinding jig, the irregular shape is caused by the axial movement of the grinding jig. The inner peripheral surface of the hole is polished, and the part to be polished is moved sequentially in the circumferential direction of the irregularly shaped hole by applying a pressing force by means of the lateral pressure direction variable means, so that the inner circumferential surface of the irregularly shaped hole extends over the entire circumference. It is configured to polish.

  By configuring the irregular hole polishing device in this way, the inner peripheral surface of the irregularly shaped hole can be automatically pressed against the grinding part of the grinding jig for grinding, and the irregularly shaped hole of the metal processing mold Polishing of the inner peripheral surface of can be automated.

The irregular hole polishing apparatus includes a lateral pressure direction varying means for varying a direction in which a side pressure is applied by the lateral pressure load means to press the inner peripheral surface of the irregularly shaped hole against the polishing portion in a circumferential direction of the irregularly shaped hole. Further, the inner pressure surface of the deformed hole is polished over the entire circumference by sequentially moving the portion to be polished by applying a pressing force by the lateral pressure direction variable means in the circumferential direction of the deformed hole . it is, it is possible to automatically polish the entire inner peripheral surface of the mold of irregular shape of the hole for metalworking.

  As described above, according to the modified hole polishing apparatus of the present invention, it is possible to automate the polishing of the inner peripheral surface of the irregularly shaped hole of the metal processing mold, and it is possible to polish in a short time without requiring skill, and the finished state is Uniform polishing with high accuracy of shape and dimensions is possible.

  1 and 2 show an embodiment of the present invention. FIG. 1 is a schematic view of a modified hole polishing apparatus, and FIG. 2 is an explanatory view of a polishing operation.

  The deformed hole polishing apparatus of this embodiment is for polishing an approach portion (also referred to as a reduction portion) of a die (shaped die) used for wire drawing of a deformed wire (a metal wire having a cross section of a square or other deformed shape). A die mounting plate 3 as a work holding means having a holding hole for holding and fixing the die 2 (workpiece) to be polished (fixed with a screw (not shown)) is horizontally arranged at a predetermined position above the apparatus body table 1. Has been. The die mounting plate 3 is supported and fixed to the support base 5 via the inclination adjusting screw 4, and the support base 5 is supported so as to be movable in the horizontal direction with respect to the apparatus main body table 1 via the guide portion 6. A pressure bar 7 that passes through the apparatus main body table 1 and protrudes downward is fixed to 5 in an arrangement that is coaxial with the holding hole of the die attachment plate 3.

  A guide plate 8 is fixed to the apparatus main body table 1 to allow the pressure rod 7 to pass therethrough with play. A timing pulley 10 is rotatably disposed below the guide plate 8 via a bearing 9. A timing belt 11 is wound around the timing pulley 10 and is driven to rotate by a motor (not shown).

  The guide unit 6 supports the support base 5 that supports and fixes the die mounting plate 3 in an X-axis direction (a direction parallel to the front surface of a lifting unit frame 16 described later) and a Y-axis direction (a lifting unit described later) in a horizontal plane. A pair of left and right Y-axis linear guides 61 fixed on the guide plate 8 and a pair of left and right pairs. A Y-axis direction moving plate 62 that is movable in the Y-axis direction along the Y-axis linear guide 61, a pair of front and rear X-axis linear guides 63 fixed on the Y-axis direction moving plate 62, and a Y-axis direction movement An X-axis direction moving plate 64 is disposed on the plate 62 and is movable in the X-axis direction along a pair of front and rear X-axis linear guides 63.

  The position of the support base 5 is slightly adjusted in the X-axis direction and the Y-axis direction by adjustment screws 65 (only the left-hand adjustment screw 65 appears in the figure) provided on the left and right sides behind the support base 5. It can be adjusted.

  The pressure unit 13 is a side pressure load means configured to apply a side pressure to the pressure rod 7 via the pressure roller 12 so as to rotate integrally with the timing pulley 10 at the lower surface eccentric position of the timing pulley 10. A case member 14 is attached.

  The pressure unit 13 is held by the die attachment plate 3 via the support base 5 and the die attachment plate 3 by pressing the pressure roller 12 against the side surface of the pressure rod 7 with the urging force of the compression spring 15. The die 2 is loaded with a side pressure, and the side pressure can be adjusted by adjusting the spring pressure of the compression spring 15.

  An elevating part frame 16 is erected on the apparatus main body table 1 at a position behind the die attaching plate 3, and a vertical wall surface on the front side facing the die attaching plate 3 of the elevating part frame 16 is provided. A pair of elevating guide rails 17 is fixed, and a polishing jig elevating plate 18 is held by the pair of elevating guide rails 17 so as to be movable up and down.

  Then, a polishing jig 19 (punch) having a rod-shaped polishing portion having a tapered cross-sectional shape that is similar to the three-dimensional shape of the approach portion of the die 2 and can be inserted into the approach portion is attached downward by a compression spring 20. A polishing jig holding plate 22 that holds the main shaft 21 so as to hold the main shaft 21 so as to press and drive the polishing jig 19 from above is elastically supported in a pulling direction by a pair of tension springs 23 and moves up and down the polishing jig. It is arranged on the front surface of the plate 18 and is movable up and down along a pair of vertical linear guides 24 fixed to the front surface of the polishing jig lifting plate 18.

  A driving rod 25 is fixed to the back portion of the polishing jig lifting plate 18 so as to pass through an opening (not shown) of the polishing jig lifting plate 18 and protrude rearward, and a bearing portion 26 is provided at the rear end of the driving rod 25. A motor 27 for driving the polishing jig is installed so as to move up and down integrally with the polishing jig lifting plate 18, and the motor 27 has a front end of the output shaft of the motor 27 and a bearing portion 26 at the rear end of the driving rod 25. A contacting eccentric cam 28 is provided.

  Thus, the eccentric cam 28 repeatedly pushes down the drive rod 25 through the bearing portion 26 by the rotation of the motor 27, thereby lowering the driving main shaft 21 and holding the polishing jig 19 held by the polishing jig holding plate 22. A polishing jig driving means is configured to reversibly drive the polishing jig 19 so as to perform polishing by pressing the polishing section against the approach portion of the die 2 held and fixed to the die mounting plate 4.

  Further, as means for moving the drive spindle 21 up and down manually, a handle 29 for moving the spindle up and down is attached to the front surface of the lifting and lowering frame 16, and a long rack 30 is provided vertically on the polishing jig lifting plate 18, and the handle shaft The pinion 31 at the tip meshes with the rack 30, and the polishing jig lifting plate 18 moves up and down by the operation of the handle 29, whereby the main shaft 21 held by the polishing jig holding plate 22 moves up and down. Yes.

  As shown in FIG. 2, this irregular hole polishing apparatus polishes the inner peripheral surface of the approach portion which is a tapered irregular hole by applying lateral pressure to the die 2 (various die) from the outside and the polishing jig 19 (punch). While applying a pressing force to the part, an abrasive is put in and the polishing jig 19 is moved up and down to polish the inner peripheral surface of the approach part. Then, the direction of the side pressure applied to the die 2 (the direction in which the side pressure is applied and the inner peripheral surface of the approach portion of the die 2 is pressed against the polishing portion of the polishing jig 19) is sequentially turned in the circumferential direction by rotating the timing pulley 10. The entire inner peripheral surface of the approach portion of the die 2 is polished. The die 2 is pressed against the polishing jig 19 and does not rotate.

  In addition, although the said embodiment is an example of the grinding | polishing apparatus which grind | polishes the approach part of a deformed die, of course, this invention is applicable also when grind | polishing parts other than the approach part of a deformed die. In addition, the present invention is not limited to irregularly shaped dies, and is generally applicable to polishing holes in metal working molds having irregularly shaped holes.

It is the schematic of the irregular shape | mold polishing apparatus of embodiment of this invention. It is explanatory drawing of grinding | polishing operation | movement of the irregular shape | mold polishing apparatus of embodiment of this invention.

Explanation of symbols

1 Device body table 2 Dice (work)
3 Die mounting plate (work holding means)
4 Inclination adjusting screw 5 Support base 6 Guide portion 7 Pressure rod 9 Bearing 10 Timing pulley 11 Timing belt 12 Pressure roller 13 Pressure portion (side pressure load means)
DESCRIPTION OF SYMBOLS 14 Case member 15 Compression spring 16 Lifting part frame 17 Lifting guide rail 18 Polishing jig lifting plate 19 Polishing jig (punch)
DESCRIPTION OF SYMBOLS 20 Compression spring 21 Main shaft 22 Polishing jig holding plate 23 Tension spring 24 Linear guide 25 Pressure rod 26 Bearing 27 Motor 27 Gear 28 Eccentric cam 29 Handle 30 Rack 31 Pinion

Claims (1)

A modified hole polishing apparatus for polishing the inner peripheral surface of a deformed hole of a metal processing mold,
A work holding means for holding a metal processing mold to be polished in a predetermined position;
A polishing jig having a rod-like polishing portion that has a cross-sectional shape similar to the three-dimensional shape of the irregularly shaped hole of the metal processing mold, and can be inserted into the hole;
The polishing jig is held and the polishing portion is inserted into the irregularly shaped hole of the metal processing mold held by the work holding means, and the axial direction of the irregularly shaped hole is not rotated with respect to the irregularly shaped hole. Polishing jig driving means for reversibly driving,
Side pressure load for applying a side pressure from the outside to the metal working mold so as to press the inner peripheral surface of the irregularly shaped hole of the non-rotating metal working mold held by the work holding means against the polishing portion of the polishing jig. Means,
By rotating the lateral pressure load means integral with the timing pulley rotated by the motor, said different shape the direction to press the inner peripheral surface of the deformed shape of the hole in the polishing section over lateral pressure by the lateral pressure load means Side pressure direction variable means that is variable in the circumferential direction of the hole,
The side pressure loading means applies a side pressure from the outside to the metal processing mold to apply a pressing force between the inner peripheral surface of the irregularly shaped hole and the polishing portion of the polishing jig. The inner circumferential surface of the irregularly shaped hole is polished by the operation in the axial direction, and the portion to be polished is sequentially moved in the circumferential direction of the irregularly shaped hole by applying the pressing force by the lateral pressure direction variable means. An irregularly shaped hole polishing apparatus configured to polish the inner peripheral surface of the irregularly shaped hole over the entire circumference.

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