JPH04201038A - Processing method for work and fixture thereof - Google Patents

Abstract

PURPOSE:To prevent a thickness deviation from generating and a foot face from distorting, by executing a foot facing with the inner diameter work part as the reference, after working the barrel inner diameter being worked with a work being clamped with the outer diameter of the brarel part as the reference. CONSTITUTION:A work 3 is composed of a cylindrical barrel 4 of a surface as cast and two foot parts 5. When the work 3 is descended with its being positioned at the upper part of a V block 2, the lower face of the foot 5 is abutted on a pin 6 movable vertically, the barrel 4 is abutted on the V groove of the V block 2 with its being descended while pushing down the pin 6 further, and the barrel 4 is lightly pressed by a pusher 19. And the fore and aft direction is positioned by a pusher 21 and stopper 22, the pin 6 is fixed with the right and left direction being positioned by a pusher 20 and stopper 23, and the work 3 is fixed with the foot 5 upper face being pressurized by a press part 16. And the barrel inner diameter 4a is worked, and the foot 5 lower face is worked with the inner diameter 4a as the reference, th with the work 3 being removed from a main body 1. Therefore it can be clamped at a different foot position.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for processing a workpiece having a body and legs, such as a motor frame with legs, and a fixture therefor.

[Conventional technology]

Conventionally, there have been two methods for machining, for example, a cast motor frame with legs (hereinafter referred to as a workpiece).

That is, the first method is to clamp the body of the workpiece, first machine the foot surface, and then perform internal diameter machining using the machined foot surface as a reference.

The second 15 method is a method in which the foot is clamped, the inner diameter is machined first, and the foot surface is machined using the machined inner diameter cutter loe part as a reference.

[Problem to be solved by the invention]

In the first method, the internal stress balance of the workpiece is disrupted due to internal diameter machining, resulting in distortion of the foot surface used as a reference, and the foot surface may have to be finished again.

Furthermore, in the second method, due to manufacturing errors in the casting, the outer diameter of the casting and the center of the machined inner diameter may not match, resulting in uneven thickness and lower product value.

An object of the present invention is to solve the above-mentioned problems and provide a workpiece processing method and its fixture that have high product value and excellent precision and workability.

[Means to solve the problem]

Focusing on the fact that manufacturing errors in castings are mainly related to the relative position ItK between the body and the foot, the above problem can be solved by crumpling the workpiece based on the outside diameter of the body, machining the inside diameter, and then machining the inside diameter part. By machining the foot surface ft71I as a reference, a positioning means for positioning the torso of the workpiece and a positioning means for positioning the body of the workpiece as a fixture for the workpiece for performing the above-mentioned processing, and a natural This problem is solved by providing means for clamping.

[For production]

Since the inner diameter is machined based on the outer diameter of the body, uneven thickness due to sword lobe will not occur. Furthermore, since the foot surface is machined after the inner diameter is machined, no distortion occurs on the foot surface.

〔Example〕

FIG. 1 is a partially sectional front view showing an embodiment of the present invention, and FIG. 2 is a plan view.

In the figure, 1 is the main body of the fixture. 2 is V block,
They are arranged on the upper surface of the main body 1 in front and rear sections. 3 is a workpiece whose surface is as-cast black leather, and has approximately cylindrical bodies 4 and 2.
It consists of two leg parts 5. Reference numeral 6 denotes a bottle, and 9111 has an inclined view 7 formed thereon and is movable up and down with respect to the main body 1. 8 is a spring that biases the bottle 6; 9 is a crank bin,
An inclined surface 9a that closely contacts the inclined surface 7 is formed at one end, and a threaded portion that is screwed into a nut 10 is formed at the other end, and is movable in the horizontal direction with respect to the main body 1.

Note that the nut 10 is rotatably held in the main body 1 by a bearing 11 relative to the nut 5 . 12 is Natsu 10
It is a nut runner that rotates. Reference numeral 13 is a bolt fixed to the upper surface of the main body 1. Reference numeral 14 denotes a clamper, which is comprised of a nut 15 with a clutch that is screwed onto the bolt 13 and is rotatable, and a presser part 16 that rotatably supports the nut 15 and moves up and down with the nut 15 relative to the screw 13. There is. 17 is a nut runner 619 that rotates the nut 15;
20° and 21 are sharp, moving work 3 up, down, and to the left, respectively. The operation will be explained below. Note that the clamper 14 is previously placed above the nut runner 18 and the bolt 13, the presser portion 16 is positioned in a direction perpendicular to that shown in FIG. 2, and the bottle 6 is vertically movable. .

The workpiece 3 is positioned above the V-block 2 and lowered by means not shown. Then, the lower surface of the foot 5 comes into contact with the head of the bottle 6, and then descends while pushing down the bottle 6, so that the body 4 comes into contact with the V-groove of the V-block 2. In this state, lightly press the trunk 4 with the pusher 19. Then, one end of the body 4 is pushed by the pusher 21 and the other end is brought into contact with the stopper 22 for positioning in the front-rear direction, and the pulling button 20 and the stopper 23 are used for positioning in the left-right direction.

Next, the nut 0 is rotated by the nut runner 12 to move the crank bi/9 so that the slope l1iQa comes into contact with the slope 7 and the bottle 6 is fixed. Thereafter, turn the presser part 16 to the position shown in FIG.
When rotated by t, the presser part 16 presses the upper surface of the foot part 5 using the contact part with the seat 24 as a fulcrum, and the workpiece 3 is pressed against the main body 1.
Fixed to.

In addition, when doing 711]
．． 21 and nut runners 12 and 18 are retracted to predetermined positions.

When the inner diameter cutter p machining is completed, remove the workpiece 3 from the metal body 1 by performing the operation opposite to the above, and in a process not shown, remove the inner diameter machining part 4.
The lower surface of the leg portion 5 is processed using & as a reference.

[Effects of the Invention] As described in detail above, according to the present invention, since the inner diameter is cut using the outer diameter of the body as a base, uneven thickness due to the cutter cut does not occur. And when clamping the work,
A natural clamp means is provided to fix the foot in that position, depending on the position of the foot, which differs depending on the workpiece.
Clamping distortion does not occur and machining can be performed with high precision and efficiency.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing one embodiment of the present invention. FIG. 2 is a plan view of FIG. 1. 1...Main body, 2...V block, 3...
Workpiece, 4... Torso, 5... Legs, 6...
・Bin, 8...Spring, 9...Crank bottle, 10.15...Nut, 12.17...
Natsutranna, 13...Boruto, 14...
Clamper, 16... Presser section, 19.20.21.
...butsusha, 22.23...stopper, 2
4... seat. Representative Patent Attorney Katsuo Ogawa

Claims (1)

[Claims] 1. A method for processing a workpiece, which comprises clamping the workpiece using the outer diameter of the body as a reference, machining the inner diameter of the body, and then machining the foot surface using the inner diameter machined portion as a reference. 2. It is characterized by comprising a positioning means for positioning the workpiece by the outer diameter of the body, and a natural clamp means for fixing the foot part of the workpiece at the position corresponding to the position of the foot part of the workpiece positioned by the positioning means. Workpiece fixture.