JP2003025141A - Broach grooving machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a broaching blade capable of efficiently forming a broached groove with high accuracy even when a work is formed of a material of high hardness such as a high tensile steel. SOLUTION: A broaching blade 10 comprises a rough broaching blade 1a with a broaching quantity (a) shallower than the predetermined depth (g), semi- finishing blades 1b and 1c of broaching quantity (b and c) substantially reaching the predetermined depth (g), permanent-finishing blades 1d and 1e of the predetermined depth, and a plurality of projecting blades 1a-1e which are arranged in series with the control dimension of blade tips with respect to a side surface of the work S different from each other step by step.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a broach grooving machine which uses a metal member as a work material, and scrapes the side surface of the work material to shape a notch groove into a predetermined depth shape.

[0002]

2. Description of the Related Art In a vehicle seat, as shown in FIG. 8, a headrest H is erected on a seatback B at a headrest stay S. The headrest stay S is made of a metal round pipe material or a round bar material, and in order to attach / detach the headrest H and to adjust the height thereof, a shaft side surface of one leg portion is provided as shown in FIGS. 9 and 10. A plurality of cutout grooves g _{1 to} g ₃ are provided.

Conventionally, in order to provide the notched grooves g _{1 to} g ₃ of the headrest stay S, a metal saw having a peripheral edge as a cutting edge and corresponding to the depth shape of the notched groove is used. Using this metal slitting saw is able to form with one by one grinding a notch groove g ₁ to g ₃ by rotating driven by pressure contact with the cutting edge to the workpiece being carried out.

When the leg portion of the headrest stay S is ground by the metal saw, it is difficult to shape the headrest stay S into a predetermined depth shape with high precision because the headrest stay S is formed of a structural high-strength steel material. . Further, since the cutting edge is easily worn away by the groove processing, dimensional control of the cutting edge must be strictly performed. Further, the metal saw itself is expensive, and the polishing of the cutting edge requires specialized processing. If even a part of the cutting edge is missing, the entire surface must be replaced, resulting in high cost.

[0005]

SUMMARY OF THE INVENTION The present invention provides a broach grooving process capable of forming a notch groove with high accuracy and efficiency even if the material to be processed is a high hardness steel material or the like. The purpose is to provide a machine.

Further, according to the present invention, even if a plurality of notches are provided,
An object of the present invention is to provide a broach grooving machine capable of simultaneously shaping each notch groove with high precision.

Furthermore, the present invention provides a broach grooving machine capable of accurately shaping a notch groove having a complicated depth shape with a cutting blade having a simple structure and being inexpensive in cost. The purpose is to provide.

Another object of the present invention is to provide a broach grooving machine capable of stably positioning and holding a work material, and capable of forming a notch groove with high accuracy and efficiency.

[0009]

In a broach grooving machine according to claim 1 of the present invention, a rough cutting blade for cutting a groove shallower than a predetermined depth shape and a groove for substantially reaching a predetermined depth shape are cut. Equipped with a medium finishing blade, a main finishing blade that cuts a groove that reaches a predetermined depth shape, and a cutting blade that has a plurality of protruding blades that are arranged in series with the step size of the cutting edge differing stepwise with respect to the side surface of the work material. It is configured by

In the broach grooving machine according to claim 2 of the present invention, a rough cutting blade that cuts a groove that reaches half or more of a predetermined depth shape and a plurality of grooves that cut a groove that approximately reaches a predetermined depth shape are formed. A finishing blade, a main finishing blade that cuts a groove that reaches a predetermined depth shape, and a main finishing blade that shapes the groove shape to a predetermined depth shape. ing.

In the broach grooving machine according to claim 3 of the present invention, a cutting blade having a plurality of rows of protruding blades arranged in series with stepwise difference in the step size of the cutting edge with respect to the side surface of the workpiece is provided. It is configured by equipping.

In the broach grooving machine according to a fourth aspect of the present invention, a plurality of flat blades having one protruding blade are integrally combined and a cutting blade having a plurality of protruding blades is provided. There is.

In a broach grooving machine according to a fifth aspect of the present invention, a pedestal having a concave portion for mounting and mounting the workpiece, and a concave portion for holding the workpiece by the concave portion of the cradle. A presser board having an intermediate plate and an intermediate plate facing the presser plate, and a top plate facing the intermediate plate.
The top board is slidably supported by a guide post that stands up from the pedestal, and the top board, intermediate board, and presser board are vertically movable with respect to the pedestal using a drive cylinder, and the presser board is pressed and supported. An elastic spring is provided on the intermediate plate, and a cutting blade of a work material, which is positioned and held by a pedestal and a presser plate, is vertically movable from the intermediate plate.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, referring to the attached drawings, the illustrated embodiment is the same as that of FIGS. 9 and 10, and as shown in FIG. 1, a headrest stay S made of structural high tensile steel material. Is used as a work material, and is applied to construct a broach grooving machine in which three notch grooves g _{1 to} g ₃ are provided by cutting the shaft side surface of one leg. This groove shaving machine is equipped with three cutting grooves g _{1 to} g ₃ at the same time, but is equipped with a cutting blade 10 having three rows of protruding blades c _{1 to} c ₃ arranged in series. There is.

As shown in FIG. 2, the cutting blade 10 includes a plurality of flat blades 10a, which are formed by cutting out a single blade 1a from the tip side of the blade 2 and cutting it out from the thickness of the blade 2. An assembly type broach having a plurality of protruding blades 1a arranged in series is provided by superposing the flat blades 2 and integrally combining them. In this prefabricated broach, since the flat blades 10a are individually provided, they can be easily polished by the surface grinder and can be replaced one by one, so that the maintenance cost can be kept low.

Each of the projecting blades 1a ... Is formed in the shape of a projecting piece having an outer edge as a cutting blade by providing an upper sloped surface that forms a clearance between adjacent blades and a lower sloped surface that forms a cutting margin. In the projecting blades 1a, the lower slope may be polished by a surface polishing machine or the like, and since the shape of the cutting blade does not change due to polishing, it is possible to prevent problems such as dimensional error due to setting.

The flat blade 10a has a flat blade 2
It is necessary to overlap and combine them together, and the notch edges 3 and 4 that are semi-circular on the left and right of the blade 2 toward the base, the through hole 5 that is circular at the approximate center of the blade 2, the protruding base of the blade 2 A circular through hole 6 is provided on the plate surface of the blade body 2 for positioning and externally stopping each blade to be combined with a plurality of insertion pins (not shown) or the like.

As shown in FIG. 3, the cutting blade 10 includes a rough cutting blade 1a having a cutting depth a which is shallower than a predetermined depth shape g, and intermediate finishing blades 1 and cutting depths b and c substantially reaching the predetermined depth shape g.
b, 1c and cutting allowances d, e reaching a predetermined depth shape g
A plurality of flat blades 10a to 10e so as to have the main finishing blades 1d and 1e and a plurality of projecting blades 1a to 1e arranged in series with stepwise differing step sizes of the cutting edges with respect to the side surface of the workpiece S.
It is assembled from e.

Of the projecting blades 1a to 1e, the rough cutting blade 1a
Is provided with a cutting allowance that reaches more than half of the predetermined depth shape. Also, the intermediate finishing blades 1b, 1
As c, the cutting allowances b and c are sequentially increased, and as the final finishing blades 1d and 1e, the same cutting allowance is obtained for reaching a predetermined depth shape and for finishing the groove shape to a predetermined depth shape. d and e are provided.

As a concrete example, when a cutout groove having a depth g of 1.5 mm is provided in a headrest stay S having a wall thickness of 2 mm, the cutting margin a of the first step is about 0.8 mm, and the cutting step of the second step. The margin b is about 1.1 mm, and the third-stage cutting margin c
Is about 1.4 mm, and the fourth and fifth steps d and e are 1.5
It may be set to mm. Since the main finishing blades 1d and 1e having the same cutting margins d and e are provided, even if any of the blades is chipped before the expected life, the groove shape is not affected.

The plurality of flat plate blades 10a to 10e are provided with a base plate 10f as shown in FIG.
Assembling the frame enclosure from g and 10h, the plurality of mounting plates 10
i, 10j, a plurality of spacer blocks 10k, a partition plate 10l and the like to assemble a middle partition, and three rows c ₁ to
The rows of the blades 1a ... arranged in series of c ₃ are assembled inside the frame enclosure, and the presser blocks 10m and 10n are attached to the outer frames 10g and 1
It can be configured as one cutting blade 10 by fitting between 0 h and clamping.

In the grooving machine equipped with the cutting blade 10 having the above-mentioned structure, the step size of the cutting edge with respect to the side surface of the workpiece S, that is, the cutting allowances a to e are stepwise changed and a plurality of them are arranged in series. Since the wall thickness of the work piece S is gradually cut off by the blades 1a to 1e of No. 1, even if the work piece S is made of a high hardness material such as high tensile steel, Shapes can be formed accurately and efficiently.

The cutting blade 10 is, in particular, a rough cutting blade 1a having a cutting allowance that reaches more than half of a predetermined depth shape, and medium finishing blades 1b, 1c having a cutting allowance that sequentially reach a predetermined depth shape.
And the final finishing blade 1d for the cutting allowance to reach the predetermined depth
And a finishing blade 1e for shaping the groove shape to a predetermined depth shape
Since each of the projecting blades (1) and (2) is provided, the notched groove can be formed with extremely high accuracy and efficiency by the main finishing blades 1d and 1e.

In addition, a plurality of flat blades 10a to 10e having one blade are integrally combined to form the cutting blade 10 having a plurality of blades 1a to 1e.
Not only can each of the blades 1a to 1e be easily formed into a predetermined shape, but also a blade 10 having a plurality of rows of blades c _{1 to} c ₃ arranged in series can be easily configured. Therefore, even when a plurality of notch grooves g _{1 to} g ₃ are provided,
The notch grooves g _{1 to} g ₃ can be simultaneously shaped with high precision.

As shown in FIG. 5, the broach grooving machine has a pedestal 11 on which a workpiece S is placed and a workpiece S.
Presser board 12 held from pedestal 11 and presser board 12
The intermediate platen 13 facing the intermediate plate 13 and the top plate 1 facing the intermediate plate 13
The vehicle body can be configured by including 4 and 4. this house,
When the pedestal 11 is provided with a concave portion 11a for mounting and mounting the workpiece, and the concave portion 12a for holding the workpiece S by the concave portion 11a of the pedestal 11 is provided, the workpiece S
Can be stably positioned and held.

The broach grooving machine is a presser board 1
2. The intermediate plate 13 and the top plate 14 are slidably supported by guide posts 15 and 16 rising from the pedestal 11, and the top plate 14, the intermediate plate 13 and the presser plate 12 are supported by the drive cylinder 17 with respect to the pedestal 11. Resilient springs 18 and 1 that are equipped to move up and down and press and support the presser plate 12.
9 is provided on the intermediate board 13, and the pedestal 11 and the holding board 1 are provided.
The cutting blade 10 of the work piece, which is positioned and held by 2 and 3, can be configured to be vertically movable from the intermediate plate 13.

In its construction, the drive cylinder 17 is the cradle 1
It is installed from both sides of 1 toward the roof 14, and as the cylinder stroke is reduced, the roof 14 and the intermediate board 1
3. The top plate 14 can be connected and installed so as to move the presser plate 12 downward. Further, gas springs are provided as the elastic springs 18 and 19, and can be attached to the intermediate plate 13 so as to press and support the presser plate 12 on the pedestal 11 by expanding and contracting the cylinder rods 18b and 19b from the gas cylinders 18a and 19a. .

Since it is necessary to use the headrest stay bent in a substantially U-shape as the work piece S and the notch grooves g _{1 to} g ₃ on the shaft side surface of one leg, the pedestal 11 and the presser board 12 are to be provided. The escape space 1 so that the other leg of the workpiece S is not pressed
1b and 12b are provided.

In the broach grooving machine thus constructed, the workpiece S is assembled in the recess 11a and the pedestal 11 is installed.
When the drive cylinder 17 is operated after being placed on the guide post 1, the top 14 and the intermediate plate 13 are moved to the guide post 1 as shown in FIG.
5 and 16, the presser plate 12 receives the work material S in the recess 12a by pressing and lowering the presser plate 12 by the cylinder rods 18b and 19b protruding from the gas cylinders 18a and 19a of the elastic springs 18 and 19, respectively. The pedestal 11 is held by being sandwiched between it and the recess 11a.

When the drive cylinder 17 is further operated,
As shown in FIG. 7, the cylinder of the elastic springs 18 and 19
When the rods 18b and 19b are contracted, the work clamp 1
2 is strongly pressed against the pedestal 11 so that a piece of the workpiece S
The legs can be sandwiched and held stably. Pressure of this presser board 12
Move the cutting blade 10 downward from the intermediate plate 13 while maintaining the contact state.
For example, one leg of the workpiece S has a plurality of cutout grooves g.₁~ G_Threeso
Each notch groove g ₁~ G_ThreeSimultaneously and precisely shaped
Can be done.

In the above-mentioned embodiment, the headrest stay S is exemplified as the material to be processed, but it can be widely applied to the case where the notch groove is provided in the other metal member. Further, as the cutting blade 10, a plurality of flat plate blades 10a to 10e
However, it is also possible to provide a solid broach provided with a plurality of blades from one block body.

[0032]

As described above, according to the broach grooving machine according to the first aspect of the present invention, a rough cutting blade having a shallower cutting allowance than a predetermined depth shape, and a notch that substantially reaches a predetermined depth shape. Cutting blades with intermediate finishing blades, main finishing blades with a cutting depth that reaches a predetermined depth shape, and multiple cutting blades that are arranged in series with the step size of the cutting edge relative to the side surface of the workpiece changed stepwise. Since it is designed to gradually cut the wall thickness of the work material, even if the work material is a high-hardness material such as high-tensile steel, the notch groove can be shaped with high accuracy and efficiency. it can.

According to the broach grooving machine of the second aspect of the present invention, the rough cutting blade has a cutting allowance that reaches half or more of the predetermined depth shape and the cutting allowance that sequentially reaches the predetermined depth shape. A finishing blade, a main finishing blade with a cutting allowance that reaches a predetermined depth shape, and a cutting blade that has a projecting blade for shaping the groove shape to a predetermined depth shape. Since the wall thickness is gradually cut off and the groove shape is strictly finished, the notch groove can be formed with extremely high precision and efficiency.

According to the broach grooving machine of the third aspect of the present invention, the cutting has a plurality of rows of protruding blades arranged in series with stepwise differences in the step size of the cutting edge with respect to the side surface of the workpiece. By equipping the blade, even if there are a plurality of notches, the notches can be simultaneously shaped with high precision.

According to the broach grooving machine of the fourth aspect of the present invention, a plurality of flat blades having one blade are integrally combined to provide a cutting blade having a plurality of blades. Even with a notch groove having a complicated depth shape, the notch groove can be accurately shaped by a cutting blade having a structure that is easy to manufacture.

According to the broach grooving machine according to the fifth aspect of the present invention, the pedestal having the recess for mounting and mounting the workpiece and the recess for the workpiece is sandwiched and held. A presser board having a recessed portion, and an intermediate board facing the presser board,
Equipped with an intermediate plate and a top plate that can move up and down with respect to the pedestal, and an elastic spring that presses and supports the presser plate is also provided on the intermediate plate, and the workpiece that positions and holds the pedestal and the presser plate By equipping the cutting blade of the material so that it can move up and down from the intermediate plate, the workpiece can be positioned and held stably, and the notch groove can be shaped with high accuracy and efficiency.

[Brief description of drawings]

FIG. 1 is a plan view showing a cutting blade equipped in a broach grooving machine according to the present invention.

FIG. 2 is an explanatory view showing a flat plate blade according to an example constituting the cutting blade of FIG. 1 in a depression angle perspective.

FIG. 3 is an explanatory view showing a row of protruding blades according to an example which constitutes the cutting blade of FIG. 1 on a side surface.

FIG. 4 is an explanatory view showing the cutting blade of FIG. 1 in an assembled structure.

5 is an explanatory view showing, in front, a broach grooving machine including the cutting blade of FIG. 4. FIG.

FIG. 6 is an explanatory view showing the broach grooving machine of FIG. 5 in the process of operation.

FIG. 7 is an explanatory view showing the broach groove shaving machine of FIG. 5 at the end stage of operation.

FIG. 8 is an explanatory view showing a vehicle seat having a headrest stay as an example of a material to which the broach grooving machine according to the present invention is applied.

9 is an explanatory view showing the headrest stay of FIG. 8 in a depression angle perspective.

10 is a perspective view showing a cutout groove provided in the headrest stay shown in FIG. 8 in a plan view.

[Explanation of symbols]

1a~1e突刃10a~10e flat blade 10 cutting blades _c 1 to c ₃突刃columns S workpiece _g 1 to g ₃ cutout groove 11 receiving stand 11a cradle recess 12 recess 13 of the presser plate 12a pressing Release Intermediate plate 14 Top plate 15,16 Guide post 17 Drive cylinder 18,19 Repulsion spring

Claims (5)

[Claims] 1. A groove shaving machine for forming a notch groove into a predetermined depth shape by cutting a side surface of the work material with a metal member as a work material, and cutting a groove shallower than the predetermined depth shape. Rough cutting blade, intermediate finishing blade that cuts a groove that almost reaches a predetermined depth shape, main finishing blade that cuts a groove that reaches a predetermined depth shape, and step size of the cutting edge with respect to the side surface of the work piece in stages A broach grooving machine that is equipped with a cutting blade having a plurality of protruding blades that are differently arranged in series. 2. A rough cutting blade that cuts a groove that reaches half or more of a predetermined depth shape, a plurality of intermediate finishing blades that cut a groove that approximately reaches a predetermined depth shape, and a groove that reaches a predetermined depth shape. The broach grooving machine according to claim 1, characterized in that the broach grooving machine is equipped with cutting blades having a main finishing blade and a main finishing blade for shaping the groove shape into a predetermined depth shape. . 3. A cutting blade having a plurality of rows of protruding blades arranged in series with stepwise differing step sizes of the cutting edges with respect to the side surface of the work material. Brooch groove shaving machine described in. 4. The broach according to any one of claims 1 to 3, wherein a plurality of flat blades having one blade are integrally combined to equip a cutting blade having a plurality of blades. Grooving machine. 5. A pedestal having a recess for assembling and mounting a work material, a holding board having a recess for holding the work material between the dent of the cradle, and an intermediate board facing the press board. ,
Equipped with an intermediate plate and a facing plate, the pressing plate, the intermediate plate, and the top plate are slidably supported by guide posts rising from the pedestal, and the table, the intermediate plate, and the pressing plate are supported by a drive cylinder. Equipped to move up and down, further,
An elastic spring for pressing and supporting the presser plate is provided on the intermediate platen, and a cutting blade of a workpiece to be positioned and held by the cradle and the presser plate is vertically movable from the intermediate platen. The broach grooving machine according to any one of 1 to 4.