JPS5914436A - Machining method of rectangular parallelopiped work - Google Patents

Abstract

PURPOSE:To machine six sides of a rectangular parallelopiped by clamping a work only five times as well as to reduce the number of machining times, by cutting three sides, which ought to be a criterion in the direction of X-, Y- and Z-axes, at a first stage. CONSTITUTION:Successively continuous five machining stages 5a-5e are installed in two rows, totalling ten stages, on a work clamping surface 4, then a Y directional reference frame 6 running in an X-axis direction is tightly set to the center of a Y-axis direction of the work clamping surface 4 so as to receive a work W at both sides of the Y-axis direction at each of machining stages 5a-5e. At the first machining stage 5a, three sides, which ought to be a criterion for the direction of X-, Y- and Z-axes, are machined for cutting and thereby machining of these six sides can be finished by clamping the work only five times. From the clamp of the work after the second time of a previously machined side is made to contact the directional reference of three axes, X, Y and Z so that not only accurate drilling can be performed but also the number of machining times can be reduced.

Description

[Detailed Description of the Invention] The present invention relates to a method of machining a rectangular parallelepiped work using an automatic machine tool such as a machining center, and uses a so-called flexible mani actuating system that reduces the number of times the work is rotated and clamped. The purpose of this study is to devise an optimal method for this purpose.

Conventionally, processing of a rectangular parallelepiped has been carried out, for example, in Fig. 1 () (a>.~
As shown in (), since six surfaces are machined in sequence, clamping must be done at least six times to finish all machining.Especially when hole drilling is involved, X-Y - Addition of the surface that serves as the reference for the three directions of Z] Until the completion of the
That is, since the hole cannot be machined until at least the third step is completed, the disadvantage is that the process requires much more effort. In addition, in the flexible mani acturing system, which aims to minimize the amount of inventory from one item to the finished product, the more processing steps there are, the more work in progress. , such conventional methods involving many steps are even less desirable.

This invention was proposed in view of the circumstances surrounding crimping, and it is possible to complete the machining of six sides of a rectangular parallelepiped by just clamping the workpiece five times, and also enables hole machining from the second clamping. The purpose of this invention is to reduce the number of processing steps, thereby enabling more effective flexible mani 7 actuating.

Hereinafter, this invention will be explained based on the drawings.

First, an example of an apparatus used to carry out the present invention will be described.

FIG. 1 shows a plan view of a workpiece changing device for an automatic machine tool, which fixedly supports a workpiece W by opening a table '' of an automatic machine tool M consisting of a machining center and a turntable R on the front side thereof. A pair of workpiece fixing devices P are delivered alternately.

The above-mentioned chief frame 1' is provided with a positioning device HD for positioning the workpiece fixing device P in the front-rear direction and in the left-right direction, and a fixing device F for fixing the positioned workpiece fixing platen P.

FIG. 2 is a plan view of the workpiece fixing plate P shown in -, and FIG. 3 is a front view thereof.

This workpiece fixing platen P has a positioning part 2 that is attached to a base plate 1 that can be moved in and out of a table T of an automatic machine tool M, and that uses a positioning device to position the base plate 1 on the table 'r in the front-rear direction and left-right direction. , fixing device F fixes base plate 1 to table Tl.
A workpiece fixing surface 4 is provided to fix the workpiece W.

, - two consecutive rows of five machining stages 5a to 5e, a total of 10 stages, are provided on the workpiece fixing surface 4, and a Y-direction reference frame 6 running in the X-axis direction is provided at the center of the workpiece fixing surface 4 in the Y-axis direction. It is fixedly installed so that each processing stage 5a to 5e receives a workpiece W on both sides in the X-axis direction.

A work clamp 7 is placed opposite to this Y-direction reference frame 6 with a work clamp space in between.

In this example, the work clamp 7 is a main body 7a that is continuously provided outside the five processing stages 5a to 5e in the Y-axis direction of each row.
, a series of clamp abutting tools 71] facing each processing stage 5a to 5e, and five hydraulic cylinders 7C for driving the clamp abutting tools 71], each hydraulic cylinder 7C being connected to the inside of the main body 7a. However, each stage 5
Work clamps with independent bodies may be provided for each of a to 5e.

An X-direction reference frame 8 for receiving the workpiece W at a predetermined position in the X-axis direction is provided on one side of each processing stage 5a to 5e in the X-axis direction.

The X-direction reference frame 8 is detachably fitted to the Y-direction reference frame 6, but may be connected to the workpiece clamp 7 or the workpiece fixing surface 4.

Furthermore, the workpiece fixing surface/1. +3 fixes a Z-direction reference frame 9 that receives one side edge of the workpiece W at a predetermined position in the X-axis direction in each of the first to fourth processing stages 5a to 5e.

In the fifth processing stage 5e, the base plate j itself also serves as the Z-direction reference frame 5].

In this example, the Z-direction reference frames 9 of the four machining stages 5a to 5d in each row are integrated, but each machining stage 5a
- 5e may each have independent Z-direction reference frames.

Next, an example of the procedure for carrying out the method of the present invention using the above-mentioned apparatus will be explained.

In each machining stage 5a to 5e, the first machining stage 5a completely unprocesses the two workpieces W, and the other machining stages 5b to 5e complete machining in the previous machining stage. The workpiece W is positioned and brought into contact with the X-direction reference frame 8, the Y-direction reference frame 6, and the Z-direction reference frame 9, and fixed with the workpiece clamp 7, and the fixed workpiece W is brought into contact with the Z-direction reference frame 53. The surface on the opposite side to the surface to which the workpiece is attached is made to protrude outward from the respective top surfaces of the X-direction reference frame 8, the Y-direction reference frame 6, and the clamp abutment tool 7b of the work clamp 7.

Here, each surface of the work W in a state where the work W is fixed on the first processing stage 5a is called as follows.

That is, the surface in contact with the Y direction reference frame 6 is the 1) surface, the surface in contact with the Z direction reference frame 9 is the IE surface, the surface in contact with the X direction reference frame 8 is the F surface, and the surface opposite to the 6th surface is the IE surface. The surface will be referred to as the A side, the side opposite to the F side as the B side, and the side opposite to the 0 side as the 0 side.

Now, in the first machining stage 5a, the B surface of the workpiece W is made to protrude upward and outward by a certain extent in the X-axis force direction of the Y-direction reference frame, and the 0 surface is made to protrude outward from the top of the clamp abutting tool 7b of the workpiece clamp 7. Clamp it so that it protrudes outward from the surface,
In this state, the surface portions of surface A, surface B, and surface 0 that protrude outside the top surface of the clamp abutting tool 7b [FIG. 2, FIG. 4, FIG. 9(a)
The hatched part] is machined by plane cutting.

In the second processing stage 511, the A side is set to the Y direction reference frame 6.
Then, contact the B side with the X-direction reference frame 8, and only the flat-cut portion of the 0th side with the Z-direction reference frame 9, and then clamp the surface.In this state, flatten the 0th side (the hatched part in Figure 5). Then, drill holes on the 0 side as necessary.

In the third processing stage 5c, three
Contact the surfaces with the three direction reference frames 8, 6, and 9 of X-Y-Z, and perform flat processing on any of the 6 surfaces and the F surface, and drill holes on that surface as necessary. .

For example, surface A is brought into contact with the Z-direction reference frame 9, surface B is brought into contact with the X-direction reference frame 8, and surface D is brought into contact with the Y-direction reference frame 6. and clamp contact tool 7
It is clamped so as to protrude outward from each top surface of a, and in this state, six surfaces (hatched portions in FIG. 6) are machined to form a flat surface, and holes are formed on the surfaces.

In the fourth processing stage 5d, three surfaces arbitrarily selected from among the processed surfaces are brought into contact with the three direction references of X-Y-Z, frames 8, 6, and 91, and The surfaces of the X-direction reference frame 8, the Y-direction wall frame 6, and the clamp abutting tool 7b are made to protrude outside the top surfaces, and the surfaces are flattened and holes are drilled as necessary. conduct.

For example, by touching the 8th side to the X-direction reference frame 8, the 0th side to the Y-direction reference frame 6, and the 0th side to the Z-direction reference frame, the 0th side is unadded] 2 parts (hatched part in Figure 7) Plane machining and hole machining are performed.

Fifth addition 1] In the stay') 5e, the last remaining unprocessed surface, that is, the F surface in this example (the hatched part in FIG. 8), is connected to the X-direction reference frame 8, the Y-direction reference frame 6 and the clamp connection Tool 7
b, and the final unprocessed surface is flattened.

Incidentally, FIGS. 9(a) to 9(e) are perspective views of a workpiece sequentially showing one process of planar machining of the workpiece. 1. The machined surface at the end of each process is indicated by hatching.

Moreover, FIG. 1() is a comparison table of the number of steps showing the number of steps between the conventional method and the force foam according to the present invention.

As explained above, in the method of the present invention, in the first stage, three
Since the surfaces are machined, machining of the six surfaces of the rectangular parallelepiped can be completed by just clamping the workpiece five times, and from the second clamping onwards, the previously machined surfaces can be processed by the three X-Y-Z Accurate hole drilling is possible by contacting the direction reference frame, and the number of steps can be reduced.

By reducing the number of machining steps, the number of workpieces that can be mounted on one workpiece fixing platen can be reduced, which reduces the number of parts in stock and enables more effective flexible manufacturing. .

Further, the workpiece is positioned and clamped with respect to the workpiece fixing plate using three directional reference frames of X-Y-Z, and the workpiece fixing plate is positioned at a predetermined position on the table of the automatic machine tool by the positioning device and the positioning section. Since it is positioned at 1 and fixed to the table by the fixed part of the fixing device, extremely high machining accuracy (J method) can be obtained.

[Brief explanation of drawings]

1 to 9 show an example of a device for carrying out the method of this invention and an example of its implementation procedure, FIG. 1 is a plan view of a work changing device for an automatic machine tool, and FIG. A plan view of the device, Figure 3 is a front view of the workpiece fixing device, and Figure 4 is a front view of the workpiece fixing device.
Figure 5 shows the first machining stage, Figure 5 shows the second machining stage, Figure 6 shows the third machining stage, and Figure 7 shows the 8th stage of the 4th machining stage. The figure is the fifth
The side views of the stages, FIGS. 9(a) to 9(e), are perspective views of the workpieces in each of the first to fifth stages, respectively.
), the machined surface at the end of the plane cutting process at each stage is indicated by hatching. FIG. 10 is a comparison table of the number of steps between the conventional method and the method of the present invention. Figures 11 (a) to (f) are perspective views of a workpiece showing an example of the conventional hexahedral processing procedure, and the machined surface at the end of the plane cutting process in the second process is hatched. This is an indication. DESCRIPTION OF SYMBOLS 1... Base board, 2... Positioning part, 3... Fixed part, 4... Work fixing surface, 5a-5e... Processing stage, 6... Y direction reference frame, 7... ··work clamp,
8...X direction reference frame, 9...Z direction reference frame, l)・
...Positioning device, F...Fixing device, M...Automatic machine tool, P...Workpiece fixing plate, T...Table, W
···work. Patent applicant: Aioi Seiki Co., Ltd. Agent
Person Hisashi Kitatani - Figure 1 M Figure 10 Figure 4 Figure 5 Figure 6 Figure 1 Figure 8 Procedure amendment (method) % formula % 2, Name of invention Processing method for rectangular parallelepiped workpiece 3, Relationship with the person making the amendment Patent applicant 6: Detailed explanation of the invention to be amended, brief explanation of the drawing, and drawing 8 Contents of the amendment (1) Detailed explanation of the invention and brief explanation of the drawing Correct as shown in the attached sheet. (2) Delete Figure 1 and engrave Figure 1 (no changes to the content).
, the phrase 11 () Figure 1 on page 11, line 17 of the specification has been changed to ``
Correct the following table 1. 2. Insert the following table between line 11 and line 11J of the specification page 11. Delete the text "Figure 11."

Claims (1)

[Claims] 1. Base plate 1 that can be freely moved in and out of table 1 of automatic machine tool W
a positioning unit 2 for positioning the base plate 1 on the table T in the front-rear force direction and the left-right direction using a positioning device;
A fixed part 3 for fixing the base plate 1 on the table T with a fixing device F, and a workpiece fixing surface 4 for fixing the workpiece W.
and at least five or more machining stages 5a to 5 on the workpiece fixing surface 4.
5e are successively provided, and a Y-direction reference frame 6 for receiving the workpiece W at a predetermined position in the Y-axis direction is arranged on one side of each processing stage 5a to 5e, and facing each other across a workpiece clamp space on the other side. A workpiece clamp 7 is provided, and an X-direction reference frame 8 receives the workpiece W at a predetermined position in the X-axis direction, and a Z-direction reference frame 9 receives one side edge of the workpiece W at a predetermined position in the Z-axis direction. is provided in each processing stage 5a to 5e, and the unprocessed workpiece W is processed in the first processing stage 5a, and the processing is completed in the previous processing stage in each of the other processing stages 51] to 5e. The workpiece W that has been
The fixed workpiece W is positioned and brought into contact with the workpiece clamp 7, and the surface of the fixed workpiece W opposite to the surface that contacts the Z-direction reference frame 9 is attached to the X-direction reference frame 8, the Y-direction reference frame 6, and the workpiece. Each surface of the workpiece W in a state in which the clamp abutting tool 71 of the clamp 7 protrudes outward from each top surface and the workpiece W is fixed on the first processing stage 5a is called as follows. The surface in contact with the reference frame 6 is the 0 plane, the surface in contact with the Z-direction reference frame 9 is the E-plane, the surface in contact with the X-direction reference frame 8 is the F-plane,
The surface opposite to the E surface is called the A surface, the surface opposite to the F surface is called the 8 surface, and the surface opposite to the 0 surface is called the 0 surface. is made to protrude outward from one end surface in the X-axis direction of the Y-direction reference frame 6, and the outer sill 11 is made to protrude from one straight surface of the clamp contact tool 71) of the work clamp 7, and in this state, the The surface and [
Surfaces 3 and 0 of the clamp contact tool 713 protruding outside the top surface are subjected to plane cutting, and in the second processing stage 5b, surface A is used as the Y-direction reference frame G, and surface B is used as the X-direction. 8t of reference frames, only the flat-cut portions of the 0th side are brought into contact with the X-direction reference frame 9, and in this state, the 0th side is flattened], and holes are drilled on the 0th side as necessary;
In the third processing stage 5c, three
The plane is brought into contact with the three direction reference frames 8, 6, and 9 of x-Y-z, and one of the IE plane and the F plane is attached to the X-direction reference frame 8, the Y-direction reference frame 6, and the clamp contact tool. 71], and in this state, flatten the sides of surface 8 and F that protrude outward from the top surface of the spider, and if necessary, drill holes on that surface. In the fourth processing stage 5d, one of the unprocessed surfaces of the 8th and F surfaces and the undamaged portion of the 0th surface is placed between the X-direction reference frame 8. tool 71], and three arbitrarily selected surfaces from among the processed surfaces are placed in the three direction reference frames 8, 6, and 9 of X-Y and -Z.
In this state, the surface on the - side protruding from the top surface is machined flat, and if necessary, holes are made on that surface.In the fifth processing stage 5e, the remaining surface is The unfinished surfaces of the A method for processing a rectangular parallelepiped workpiece, which is characterized by drilling holes on its surface.