JP3884198B2 - Tool press-fitting method and press-fitting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a press-fitting method and a press-fitting device for attaching a clamping member to a shaft of a tool used in a machine tool.
[0002]
[Prior art]
FIG. 3 shows a tool 101 provided with a clamping member 103, and a shaft 102 extends integrally with the tool 101 in the axial direction. The clamping member 103 has a ring shape and is formed with a single groove on the outer periphery, and is attached to a predetermined position in the axial direction of the shaft 102 by press-fitting the shaft 102.
[0003]
As shown in FIG. 4, a plurality of tools 101 to which the clamping member 103 is attached are stored in alignment on the pallet 104. The pallet 104 is disposed in the vicinity of the machine tool 105 and is conveyed into the machine tool 105. Then, as shown in FIG. 5, the chuck of the robot hand 106 is chucked in a state where it enters the outer peripheral groove of the clamping member 103, and is attached to a collet chuck of a spindle not shown. Since each of such tools 101 does not include a generally used tool holding holder, ATC space can be saved.
[0004]
FIG. 6 shows a conventional method for attaching the clamping member 103 to the shaft 102 of the tool 101. In this apparatus, the clamping member 103 is clamped by the vise 107, and the tapered portion 109 of the tool 101 is substantially fitted into the hole 108 of the clamping member 103 in this clamped state. The shaft 102 is pressed into the clamping member 103 by hitting the base of the shaft 102 with the hammer 110, and the clamping member 103 is attached to a predetermined position of the shaft 103.
[0005]
7 and 8 show another conventional method described in Japanese Patent Application Laid-Open No. 10-249591. A die 121 is attached on the pedestal 122, and a punch 119 facing the die 121 is attached to the molding unit 120. A column 111 is erected on the pedestal 122, and a mounting plate 114 is mounted on the column 111. A press shaft 123 is attached to the attachment plate 114 so as to be movable up and down, and the entire molding portion 120 is attached to the press shaft 123. Accordingly, the entire molding unit 120 can be moved up and down by the vertical movement of the press shaft 123. A stopper 113 that restricts the downward movement of the press shaft 123 is provided at the upper end of the press shaft 123.
[0006]
The vertical movement of the press shaft 123 is performed by rotating the lever 112. Further, a compression coil spring 116 is provided in the molding unit 120. The compression coil spring 116 compresses and absorbs the force even if the working pressure is further increased in a state where the press shaft 123 is moved downward by the turning operation of the lever 112 and the stopper 113 is in contact with the mounting plate 114. . Thereby, a pressure can always be kept constant.
[0007]
[Problems to be solved by the invention]
However, in these conventional methods, for example, when the diameter of the tool 101 serving as the blade is equal to or larger than the outer diameter of the shaft 102, the clamping member 103 is not fitted from the shaft 102 side when the clamping member 103 is attached. Must not. In such a case, since there is no taper portion for guiding, press-fitting cannot be performed easily, requiring skillful work and poor workability.
[0008]
Further, when the position accuracy of the clamping member 103 with respect to the shaft 102 is poor and the distance between the clamping member 103 and the tip of the tool (blade) 101 is short, the clamping member 103 and the workpiece interfere when the workpiece is machined. There's a problem.
[0009]
In addition to this, in the conventional technique disclosed in Japanese Patent Laid-Open No. 10-249591, since the processing is performed with a constant pressure, there is a dimensional variation between the outer diameter of the shaft 102 and the inner diameter of the hole of the clamping member 103. In some cases, there is a further problem that the shaft does not enter the hole even when pressure is applied.
[0010]
The present invention has been made in consideration of such conventional problems, and an object thereof is to provide a press-fitting method and a press-fitting device that can attach a clamping member to a shaft of a tool with high positional accuracy and efficiency. To do.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is the press-fitting method of the tool in which the tool is placed on the press-fitting device, and the holding member having the hole is press-fitted into the shaft of the tool and attached to the desired position . by the positioning means, and the placed the tool is moved in the axial direction of the shaft, a first positioning step for positioning in the axial direction, by the second positioning means, the shaft to clamp the tool A second positioning step for positioning in a direction perpendicular to the axial direction of the tool, and a desired axial direction in which the clamping member is press-fitted into the shaft of the tool by the first positioning step and the second positioning step. position after determining, the clamping member on which is mounted the shaft of the tool, to press in the axial direction of the shaft to the clamping member by a tubular member , Characterized in that it and a step of press-fitting to the desired position of the shaft of the tool.
[0012]
In the present invention, along with positioning the axial direction by moving the placed tool into the press apparatus in the axial direction of the shaft by the first positioning means, the axis of the shaft to clamp the tool by the second positioning means positioning is performed in a direction perpendicular to the direction, by the two positioning step after determining the desired position of the axial press-fitted in said clamping member relative to the shaft of the tool, placing the clamping member to the shaft of the tool Then, the clamping member is pressed in the axial direction of the shaft by a cylindrical member, thereby press-fitting to a desired position of the shaft of the tool. Therefore, the clamping member can be press-fitted from the shaft side, and can be press-fitted with high positional accuracy.
[0013]
The invention of claim 2 is the invention according to claim 1, wherein the clamping member comprises Rukoto is pressed until abutting against the said second positioning means.
[0014]
In the present invention, since the clamping member is press-fitted until it comes into contact with the second positioning means, it can be accurately positioned and attached at a predetermined position in the axial direction of the shaft.
[0015]
The invention according to claim 3, in the press-fitting apparatus of the tool attaching the clamping member to a desired position by press-fitting the shaft of the tool having a bore, and a tool rest which the tool is mounted to move in the axial direction of the shaft, a first positioning means for positioning the axial direction of the tool, the tool have a clamp member for clamping a second positioning means for positioning in the direction perpendicular to the axial direction of the shaft A pressing and moving means for moving the cylindrical member in the axial direction so that the clamping member placed on the shaft of the tool is pressed and pressed in the axial direction of the shaft by the cylindrical member; and the second positioning be provided to the means, it comprises a press-fitting positioning means for determining a press-fit position in contact with the clamping member to be press-fitted to move in the axial direction of the shaft by the pressing movement means And features.
[0016]
In the present invention, the first positioning means, the tool rest which the tool is mounted is moved in the axial direction of the shaft, positioning is performed in the axial direction of the tool, having a clamping member for clamping the tool the second positioning means, for positioning in the direction perpendicular to the axial direction of the shaft. The pressing and moving means moves the cylindrical member in the axial direction so that the clamping member placed on the shaft of the tool is pressed and pressed in the axial direction of the shaft by the cylindrical member. The press-fitting positioning means provided in the second positioning means abuts on the clamping member that is press-fitted and moved in the axial direction of the shaft by the pressing movement means to determine the press-fitting position. Therefore, it is possible to press-fit the clamping member into the shaft with high accuracy.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2 are a front view and a side view of an embodiment of the present invention. In this embodiment, a form applied to a tool press-fitting device using a hand press is shown. The tool press-fitting device 1 includes a flat base 3 fixed on the upper surface of a base 2 and a flat back plate 4 standing upright. The support 3 and the back plate 4 support the L-shaped support structure. Is formed.
[0018]
A Z-axis stage 5 is mounted upright on the top surface of the gantry 3, and a stage mounting plate 7 is mounted on the side surface of the Z-axis stage 5. The stage mounting plate 7 moves in the vertical direction (Z direction) by rotating the handle 6 mounted on the Z-axis stage 5. And the height adjustment of the tool post 10 which is the 1st positioning means mentioned later is performed by the vertical motion of the stage mounting plate 7. FIG.
[0019]
The tool post 10 has a flat plate shape and is fixed to the upper surface of the linear shaft 9, and a disk-shaped slit cutter 13 as a tool is placed in this fixed state. The linear shaft 9 is fixed so as to face in the vertical direction (Z direction) by inserting a linear shaft holder 8 having two upper and lower stages protruding from the stage mounting plate 7 in the horizontal direction (X direction).
[0020]
Although the slot cutter 13 as a tool is integrated with the shaft 14, in this embodiment, the outer diameter is a disk shape larger than the outer diameter of the shaft 14. The shaft 14 has a cylindrical shape.
[0021]
Above the tool rest 10, a pair of split clamp members 11, 12 are arranged as second positioning means for positioning the slit cutter 13 in the horizontal direction while sandwiching the shaft 14. The split clamp members 11 and 12 are attached to the front surface of the back plate 12 so as to protrude in the horizontal direction (the direction opposite to the Y direction). In this case, one of the split mold clamp members 11 is fixed to the front surface of the back plate 12, but the other split mold clamp member 12 is moved in the horizontal direction (X direction) by a cylinder (not shown). Yes.
[0022]
A clamping member 18 is placed on the upper end of the shaft 14 integrated with the slot cutter 13. The clamping member 18 has a ring shape having a hole with a slightly smaller inner diameter than the outer diameter of the shaft 14, and the shaft 14 is press-fitted into the hole of the clamping member 14. A pressing member 16 as a pressing means is provided above the clamping member 18. A cylindrical member 19, which is a cylinder, hangs down from the pressing member 16, and this cylindrical member 19 is in contact with the upper end surface of the clamping member 18.
[0023]
The upper end portion of the shaft 14 of the slitting cutter 13 placed on the tool rest 10 is chamfered in a tapered shape or the like, and the chamfered portion and the hole of the clamping member 18 are brought into contact with each other, thereby holding the clamping member 18. Can be easily placed at a predetermined position on the upper end portion of the shaft 14. Further, the inner diameter of the cylindrical member 19 is larger than the outer diameter of the shaft 14, whereby the upper end surface of the clamping member 18 is pressed by the lower end surface of the cylindrical member 19, and the clamping member 18 is attached to the shaft 14. The cylindrical member 19 and the shaft 14 do not interfere with each other when press-fitting.
[0024]
The clamping member 18 pressed by the lower end surface of the cylindrical member 19 is positioned at a predetermined position in the axial direction of the shaft 14 by contacting the upper surface A (see FIG. 1) of the pair of split clamp members 11 and 12. Attached. The pressing member 16 is connected to a lever 17 via a press shaft 15, and can move in the vertical direction (Z direction) by rotating the lever 17.
[0025]
Next, a method of press-fitting the clamping member 18 into the shaft 14 of the slitting cutter 13 using the tool press-fitting device 1 having this structure will be described.
[0026]
First, by rotating the handle 6 of the Z-axis stage 5, the tool post 10 is moved up and down to be fixed at a predetermined position. The slitting cutter 13 is placed on the tool rest 10 so that the shaft 14 faces upward. At this time, the shaft 14 is brought into contact with the split clamp member 11 fixed to the back plate 4.
[0027]
Thereafter, the split clamp member 12 is moved forward (moved in the X direction), and the shaft 14 is clamped (clamped) by the split clamp member 12 and the split clamp member 11. Then, by placing the clamping member 18 on the upper end portion of the shaft 14, the axis of the shaft 14 and the center of the hole of the clamping member 18 are substantially matched.
[0028]
Next, the lower end surface of the cylindrical member 19 is placed on the upper end surface of the clamping member 18. By rotating the lever 17 in this state, the pressing member 16 is lowered and the upper end surface of the cylindrical member 19 is pressed by the lower end surface thereof. As a result, the shaft 14 is press-fitted into the hole of the clamping member 18 and further comes into contact with the upper surface A of the split clamp members 11 and 12 and stops. Thereby, the clamping member 18 is attached to a predetermined position on the outer periphery of the shaft 14.
[0029]
After such attachment, the pressing member 16 is raised and the split clamp member 12 is retracted (reverse to the X direction). Thereafter, the cylindrical member 19 and the slitting cutter 13 in which the clamping member 18 is attached to the shaft 14 are taken out.
[0030]
In such an embodiment, since the clamping member 18 is pressed by the cylindrical member 19 without controlling the pressure, there is a problem even if dimensional variation occurs between the outer diameter of the shaft 14 and the inner diameter of the hole of the clamping member 18. It can be press-fitted without. Further, when the slitting cutter 13 is positioned on the tool post 10 and the position of the clamping member is determined by the A surface of the split clamp members 11 and 12 at the time of press-fitting, the clamping member 18 with respect to the shaft 14 of the tool. Can be accurately positioned.
[0031]
In this embodiment, the slitting cutter 13 has been described as a tool. However, when the diameter of the tool (blade) is equal to or larger than the outer diameter of the shaft 14, the clamping member 18 must be attached from the shaft side. Therefore, for example, the above press-fitting can be used for an end mill having the same blade and shaft diameters.
[0032]
From the above description, the present invention includes the following technical idea.
[0033]
(1) In a method for attaching a gripping member having a hole to a shaft of a tool,
A positioning step of positioning the tool at a desired position; a step of clamping the outer periphery of the positioned tool; and a step of attaching the gripping member to the outer periphery of the shaft of the tool by pressing the gripping member with a cylindrical member. Tool press-fitting method.
[0034]
In this invention, in a state where the outer periphery of the tool is clamped, the gripping member is pressed onto the outer periphery of the shaft by pressing the gripping member with the tubular member, so that the gripping member can be press-fitted from the shaft side.
[0035]
(2) In a press-fitting method for a tool, a ring-shaped holding member having a hole is press-fitted into a tool shaft and attached to a desired position.
Positioning the tool in the axial direction of the shaft by the first positioning means;
Positioning the tool in a direction orthogonal to the axial direction of the shaft by the second positioning means;
Press-fitting the clamping member to a desired position on the shaft of the tool by pressing the upper end surface of the clamping member with the lower end surface of the tubular member; and
A method for press-fitting a tool, comprising:
[0036]
In the present invention, the first positioning means positions the shaft in the axial direction, the second positioning means positions in the direction orthogonal to the shaft axial direction, and the cylindrical member is pressed in this state, thereby Since the shaft is press-fitted to the desired position of the sandwiching member via the shaped member, the sandwiching member can be press-fit from the shaft side and can be press-fitted with high positional accuracy.
[0037]
(3) The method for press-fitting a tool according to (1) or (2), wherein an inner diameter of the cylindrical member is larger than an outer diameter of a shaft of the tool.
[0038]
In this invention, since the cylindrical member and the shaft do not interfere with each other, the press-fitting can be performed smoothly.
[0039]
【The invention's effect】
According to the present invention, positioning the tool in the axial direction by the first positioning means, and positioned in a direction perpendicular to the axial direction of the shaft by the second positioning means, the clamping member relative to the shaft of the tool After the desired axial position to be press-fitted is determined, the clamping member is placed on the shaft of the tool, and pressed into the axial direction of the shaft by the cylindrical member to press-fit to the desired position of the shaft of the tool. . Therefore, the clamping member can be press-fitted from the shaft side, and can be press-fitted with high positional accuracy.
[0040]
According to the invention of claim 2, since the clamping member is press-fitted until it comes into contact with the second positioning means, it can be accurately positioned and attached at a predetermined position in the axial direction of the shaft.
[0041]
According to the invention of claim 3, the first positioning means and second positioning means positions the tool in the axial direction and the orthogonal direction of the shaft, pushing the moving means, the shaft of the clamping member by a tubular member axis The cylindrical member is moved in the axial direction so as to be pressed and pressed in the direction, and the press-fitting positioning means comes into contact with the clamping member that is press-fitted and moved in the axial direction of the shaft by the press moving means to determine the press-fitting position. The clamping member can be pressed into the shaft with high accuracy.
[Brief description of the drawings]
FIG. 1 is a front view of an embodiment of the present invention.
FIG. 2 is a side view of an embodiment.
FIG. 3 is a perspective view illustrating an example of a tool.
FIG. 4 is a perspective view for explaining a use application of a tool.
FIG. 5 is a perspective view of a state in which a tool is gripped.
FIG. 6 is a perspective view showing conventional press-fitting.
FIG. 7 is a side view of an apparatus for performing another conventional press-fitting.
FIG. 8 is a front view of the main part used in FIG. 7;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Press-fit apparatus 10 Tool post 11 12 Split-type clamp member 13 Slot cutter 14 Shaft 16 Pressing member 18 Holding member

Claims (3)

In the press-in method of the tool, the tool is placed on the press-fitting device, and the clamping member having the hole is press-fitted into the shaft of the tool and attached to the desired position
A first positioning step of performing positioning in the axial direction by moving the placed tool in the axial direction of the shaft by a first positioning means ;
A second positioning step of performing positioning in a direction perpendicular to the axial direction of the shaft by sandwiching the tool by a second positioning means ;
After determining the desired axial position where the clamping member is press-fitted with respect to the shaft of the tool by the first positioning step and the second positioning step, the clamping member is placed on the shaft of the tool. , the clamping member by a tubular member by pushing in the axial direction of the shaft, and a step of press-fitting to the desired position of the shaft of the tool,
A method for press-fitting a tool, comprising: The clamping member is press-fit method according to claim 1, wherein the tool, characterized in Rukoto is pressed until abutting against the said second positioning means. In a press-fitting device for a tool that press-fits a clamping member having a hole into a shaft of a tool and attaches it to a desired position,
The tool rest which the tool is mounted is moved in the axial direction of the shaft, a first positioning means for positioning the axial direction of the tool,
Have a clamping member for clamping the tool, and a second positioning means for positioning in the direction perpendicular to the axial direction of the shaft,
A pressing and moving means for moving the cylindrical member in the axial direction so that the clamping member placed on the shaft of the tool is pressed and pressed in the axial direction of the shaft by the cylindrical member;
A press-fitting positioning unit that is provided in the second positioning unit and determines a press-fitting position by contacting the clamping member that is press-fitted and moved in the axial direction of the shaft by the pressing movement unit;
A tool press-fitting device comprising:

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