JP3212248U - Drilling machine type chip dresser - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chip dresser device which can be accurately shaped without causing a core blur even in the case of an electrode such as an eccentric tip, while having a simple structure. In a dresser apparatus for shaping a tip end shape of an electrode tip (T) held by a dresser base (3) by a dresser head (2) holding a blade (6) and having a blade holder (7) rotatable around an axis. 7 is provided integrally with the outer fitting cylindrical portion 7b below the holder portion 7a, and at the same time, the inner fitting column portion 10b is provided below the tip holder portion 10a of the holder body 10 so that the inner fitting cylindrical portion 7b and the inner fitting portion are fitted during dressing. Core blurring is prevented by fitting the cylindrical portion 10b. [Selection] Figure 1

Description

  The present invention relates to a tip dresser device for easily shaping, for example, wear or deformation at the tip of an electrode tip used for resistance welding or the like using a drilling machine.

  Conventionally, when welding a nut having a projection part to a steel plate or the like, for example, resistance welding that melts and welds the projection part by sandwiching a workpiece with a pair of upper and lower electrode tips and applying current by applying pressure is repeatedly applied. Dressing that periodically shapes the tip of the electrode tip into a regular shape as the tip of the electrode tip wears, deforms, or adheres to impurities and adversely affects welding when repeated energization Work is being done. In general, a drilling machine is used as the dressing operation. (For example, see Patent Document 1 and Patent Document 2.)

Japanese Utility Model Publication No. 63-11193. JP, 2014-151344, A.

  By the way, in a conventional general drilling type chip dresser, a symmetric cutting blade (blade) is mounted on a blade holder of a dresser head attached to the drilling machine, and this blade holder is rotated by a rotary drive source of the drilling machine. Since the blade is brought into contact with the tip surface of the electrode tip fixed to the dresser base and the tip is shaped (dressing), for example, the tip of the electrode tip is not symmetrical about the central axis. In the case of such a so-called eccentric tip, there is a problem that the blade holder on the dresser head side causes a core blur with respect to the electrode tip fixed on the dresser base side, and it is difficult to accurately shape the tip.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a chip dresser device that can be accurately shaped at low cost, even with an electrode such as an eccentric tip, while having a simple structure.

  In order to achieve the above object, according to the present invention, a dresser head that can be mounted on a drilling machine is movable up and down on a dresser base, and the dresser head is provided with a blade holder that can be rotated by a driving source of the drilling machine. The holder is configured to be freely attachable with a dresser blade, and the dresser base is provided with a tip holder portion for holding an electrode tip, and the tip portion of the electrode tip held by the tip holder portion is connected to the dresser. In the drilling type chip dresser device shaped by the head dresser blade, an inner fitting cylindrical portion larger in diameter than the tip holder portion is provided in the vicinity of the tip holder portion of the dresser base, and the dresser head The inner fitting cylindrical part can be fitted in the vicinity of the holder part of the blade holder. Forming an outer fitting cylinder portion, and to perform dressing operation in a state in which the external fitting cylindrical portion of the dresser head is fitted to the inner fitting cylindrical portion of the dresser base.

  In this way, when performing dressing work, if the outer fitting cylindrical part on the dresser head side is fitted to the inner fitting column part on the dresser base side and the blade holder is rotated, the electrode chip is fixed to the dresser base side. The blade holder on the dresser head side can be accurately shaped without causing a core blur. In this case, the electrode tip may be a normal electrode tip having a symmetrical shape around the central axis, or an electrode tip called a so-called eccentric tip that is not symmetrical.

In the present invention, the electrode tip is an eccentric tip whose tip is not symmetrical with respect to the central axis.
In the case of an eccentric tip, it is particularly effective because core blur is likely to occur.
In this case, it is preferable to provide an index for setting the direction of the eccentric tip in a predetermined direction when the electrode tip is held by the tip holder portion at a predetermined portion of the inner fitting cylindrical portion.
By providing such an index, when positioning the eccentric tip, it can be set in an accurate posture, and the dressing operation can be performed more efficiently.

An internally fitted columnar part is provided in the vicinity of the tip holder part of the dresser base, and an externally fitted cylindrical part is formed in the vicinity of the holder part of the blade holder of the dresser head, and the externally fitted cylindrical part on the dresser head side is connected to the dresser base side. By performing the dressing operation in a state of being fitted to the inner fitting cylindrical portion of the electrode, the electrode chip held by the dresser base and the blade held by the blade holder of the dresser head are accurately shaped without causing core blurring. be able to. Such an apparatus is particularly effective for shaping an eccentric tip.
In addition, when performing the dressing operation for the eccentric tip, if an index for setting the arrangement direction of the eccentric tip in a predetermined direction is provided, the dressing operation can be performed more efficiently.

It is an exploded view which shows the principal part of the dresser apparatus based on this invention. It is explanatory drawing which shows an assembly | attachment state, (a) is before dressing, (b) is explanatory drawing which shows a dressing state.

An example of a drilling machine type chip dresser according to the present invention will be described with reference to the accompanying drawings.
The drilling machine type chip dresser device of the present invention provides a chip dresser device that can be accurately shaped at low cost without causing a core blur even in the case of an electrode such as an eccentric tip, while having a simple structure. The purpose is to provide an internally fitted cylindrical part in the vicinity of the tip holder part of the dresser base, and to provide an externally fitted cylindrical part in the vicinity of the holder part of the blade holder of the dresser head. The dressing operation is performed in a state of being fitted to the inner fitting cylindrical portion on the side.

  A chip dresser device 1 according to the present invention includes a dresser head 2 that houses a blade 6 that is a cutter blade, and a dresser base 3 that holds an electrode chip to be shaped. The dresser head 2 and the dresser base 3 include The dresser head 2 can be moved up and down with respect to the dresser base 3.

  As shown in FIGS. 1 and 2, the dresser head 2 includes a shaft portion 4 that can be mounted on a drilling machine (not shown), and a case portion 5 that is integrated below the shaft portion 4. A blade holder 7 that holds a blade 6 that is a cutter blade is housed inside the case portion 5 while being rotatable around the shaft portion 4.

  The blade holder 7 is integrally provided with a cylindrical holder portion 7a for holding the blade 6 and an outer fitting cylindrical portion 7b having a diameter larger than that of the holder portion 7a. The outer fitting cylindrical portion 7b is described later. The internal fitting cylindrical portion of the dresser base 3 to be engaged can be fitted.

The dresser base 3 includes a base body 8 that can be attached to a predetermined location of a drilling machine, and a holder body 10 that can be attached to a mounting portion 8a at the center of the base body 8. The holder body 10 includes an electrode chip T. Are integrally provided with a chip holder part 10a for holding the inner cylindrical part 10b having a larger diameter than the chip holder part 10a.
In this embodiment, since the shape of the electrode tip T is a so-called eccentric tip that is not symmetrical about the central axis, the position of the tip holder portion 10a is offset from the center location of the internally fitted cylindrical portion 10b. It is set as the form projected at the position.
In addition, a recess for setting the chip holder portion 10a is formed on the lower surface of the electrode tip T, and the recess is set in a state in which the recess is fitted to the tip holder portion 10a. In order to set the apex portion of T in accordance with the central axis, an index S as a mark is provided at a predetermined position on the upper surface of the internally fitted cylindrical portion 10b. In this embodiment, a bolt is screwed in as the index S, but the specific method of the index S is arbitrary.

  In the above-described chip dresser device 1, as shown in FIG. 2A, in the dresser head 2, the blade holder 7 to which the blade 6 is attached is assembled in the case portion 5, while in the dresser base 3 The concave portion formed on the lower surface of the electrode tip T is set in a state of being fitted to the tip holder portion 10a, and the orientation of the electrode tip T at that time is set with the index S as described above, and the tip holder Positioned and held by the portion 10a.

  In this state, when the dresser head 2 is lowered and the case portion 5 is covered with the electrode chip T, as shown in FIG. 2B, the external fitting cylindrical portion 7b on the dresser head 2 side and the dresser base 3 side are arranged. At the same time that the inner fitting cylindrical portion 10b is fitted, the blade 6 is in contact with the upper end surface of the electrode tip T.

  In this state, the tip of the electrode tip T is shaped by rotating the dresser head 2 around the axis. At this time, the outer diameter of the inner fitting cylindrical portion 10b and the inner diameter of the outer fitting cylindrical portion 7b are substantially the same. Therefore, when the dresser head 2 rotates, the outer fitting cylindrical portion 7b rotates in a state of sliding contact with the outer surface of the inner fitting column portion 10b, and no core blur occurs between the blade 6 and the electrode tip T. Can be shaped accurately.

  In the above embodiment, an eccentric tip is used as an example of the electrode tip T. However, it goes without saying that the present invention can also be applied to a case of a symmetrical electrode tip about a normal central axis.

  As described above, it can be configured extremely easily and inexpensively, and can be shaped with high accuracy.

In addition, this invention is not limited to the above embodiments. Those having substantially the same configuration as those described in the claims of the utility model registration of the present invention and having the same operational effects belong to the technical scope of the present invention.
For example, the internal fitting cylindrical portion 10b is not limited to a cylindrical shape, and may be a cylindrical shape.

  Since it can be configured at a very low cost and simply, and core blurring at the time of dressing can be prevented, widespread use in factories where welding work is frequently performed is expected.

  DESCRIPTION OF SYMBOLS 1 ... Chip dresser apparatus, 2 ... Dresser head, 3 ... Dresser base, 6 ... Blade, 7 ... Blade holder, 7a ... Holder part, 7b ... External fitting cylindrical part, 10 ... Holder body, 10a ... Chip holder part, 10b ... Internally fitted columnar part, S ... index.

Claims (3)

A dresser head that can be mounted on a drilling machine can be moved up and down on a dresser base, and the dresser head is provided with a blade holder that can be rotated by a drive source of the drilling machine, and a blade for dresser can be mounted on the blade holder. In addition, the dresser base is provided with a tip holder portion for holding the electrode tip, and the tip portion of the electrode tip held by the tip holder portion is shaped by the dresser blade of the dresser head. A drilling-type chip dresser apparatus, wherein an inner fitting cylindrical portion having a larger diameter than the tip holder portion is provided in the vicinity of the tip holder portion of the dresser base, and the vicinity of the holder portion of the blade holder of the dresser head Is formed with an outer fitting cylindrical portion that can fit the inner fitting column portion. Drilling type tip dresser apparatus characterized by the outer fitting cylinder has to carry out the dressing operation in a state of fitted into the cylindrical portion fitted in the dresser base Ressaheddo. 2. The drilling type chip dresser device according to claim 1, wherein the tip of the electrode is an eccentric tip whose tip is not symmetrical with respect to the central axis. An index for setting a disposing direction of the eccentric tip in a predetermined direction when the electrode tip is held by the tip holder portion is provided at a predetermined portion of the inner fitting cylindrical portion. Item 3. A drilling machine type chip dresser according to item 2.

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