JP2001205529A - Fixing device and fixing method for cylindrical workpiece - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fixing device and fixing method for a cylindrical workpiece that both can dispense with unnecessary reinforcing ribs and reduce the cost of a stretcher. SOLUTION: The fixing device, which is designed for use in machining a cylindrical workpiece forming a stretcher St as a lateral movement positioning guide in a butt positioning device, comprises a plurality of fluid cylinders 2 having a clamp portion 1, and a control system for controlling or driving the fluid cylinders 2. The fluid cylinders 2 are divided into two systems including a group of inner cylinders 2in1 to 2inn and a group of outer cylinders 2out1 to 2outn, whose clamp portions 1 are retractile on the basis of a command from the control system to clamp or unclamp the cylindrical workpiece. For the machining of the cylinder, the group of inner cylinders is inserted into the cylinder and the group of outer cylinders is properly disposed about the cylinder to thus hold the cylinder properly rigidly during the machining.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder used for machining a surface of a cylindrical body used for a guide, and more particularly to a cylinder used for machining a right and left guide stretch of an abutting positioning device such as a plate processing machine. The present invention relates to a fixing device and a fixing method for a shaped workpiece.

[0002]

2. Description of the Related Art For example, a stretch which constitutes an abutment positioning device such as a plate processing machine makes the abutment movable in the left-right direction, and moves in the front-rear direction while holding the abutment itself. In order to have the function of positioning the stretch at a predetermined position, the straightness of the stretch itself is very severely required. Therefore, the square pipe forming the tubular body to be the stretch is finished by a milling machine or the like. Therefore, an excessive load is applied to the square pipe itself, which becomes a stretch, and the pipe is bent, which adversely affects the processing accuracy.

Conventionally, a plurality of reinforcing ribs are fixed and disposed by welding or the like in advance in the longitudinal direction of a square pipe before machining in a hollow portion thereof in order to eliminate the above-mentioned adverse effects. The cost was high.

[0004]

However, in the conventional example described above, when the user uses the stretch,
A reinforcing rib is unnecessary because of its rigidity and the like, and there is a need to reduce the cost by eliminating the reinforcing rib.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and does not apply an excessive load to the cylindrical body during the processing of the cylindrical workpiece to be stretched, thereby preventing the cylindrical body from being stretched in the longitudinal direction. The present invention provides a fixing device and a fixing method for a cylindrical workpiece, which can fix the cylindrical body with a uniform clamping force, can finally eliminate unnecessary reinforcing ribs, and can realize a reduction in stretching cost. The purpose is to do.

[0006]

The present invention can solve the above-mentioned problems by providing the following constitution.

(1) A fixing device used when processing a cylindrical workpiece for forming a stretch which serves as a guide for horizontal movement positioning of an abutment positioning device used in a plate material processing machine such as a press brake, and a clamp portion. Comprising a plurality of fluid cylinders having, these plurality of fluid cylinders,
A control system for driving and controlling the plurality of fluid cylinders, dividing the plurality of fluid cylinders into two systems, an internal cylinder group and an external cylinder group, and allowing the clamp unit to protrude and retreat based on a command from the control system. The cylindrical body to be machined can be freely clamped / unclamped. During machining of the cylindrical body, the internal cylinder group is inserted and arranged inside the cylindrical body, and the external cylinder group is connected to the cylindrical body. A fixing device for fixing a cylindrical workpiece, wherein the fixing device is appropriately disposed around the outer periphery of the cylindrical member, and the cylindrical body is fixed and held appropriately and firmly during machining.

(2) The inner cylinder group is arranged symmetrically at a desired pitch on both left and right sides of a cylindrical body that becomes a jig base extending in the longitudinal direction, and the inner and outer cylinder groups are arranged via a clamp portion. The fixing device for a cylindrical workpiece according to the above item (1), wherein the fixing device is configured to be opposed to each other, and the stretch to be processed can be fixed and held appropriately and firmly from inside and outside.

(3) The cylindrical workpiece fixing device according to the above (1), wherein a hydraulic circuit is used for the control system.

(4) An apparatus for fixing a cylindrical workpiece according to the above (1), wherein a drive control of the fluid cylinder is performed by using a solenoid valve circuit as a control device of the control system.

(5) A method for fixing a cylindrical workpiece, which forms a stretch, which serves as a guide for positioning in the left-right direction of a butting positioning device used in a plate material processing machine such as a press brake. A plurality of fluid cylinders having a longitudinally extending jig base are arranged symmetrically at a desired pitch on both left and right sides of the jig base, as an inner cylinder group, and an outer cylinder group is arranged around the inner cylinder group, A control system for driving and controlling these inner and outer cylinder groups is provided, and these cylinder groups are divided into two systems, inner and outer, and the clamp portion can be freely retracted and retracted based on a command from the control system so that the workpiece can be clamped / unclamped freely. During machining of the workpiece, the internal cylinder group is inserted and disposed inside the cylindrical workpiece, and the external cylinder group is disposed around the outside of the workpiece. Yichun disposed, machined during fixing process of the tubular body workpieces, characterized in that formed by properly firmly fixed holding said workpiece.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below.

FIG. 1 is a block diagram showing an example of an overall configuration including a hydraulic circuit and a control system of a fixing device for a cylindrical workpiece according to the present invention, and FIG. 2A is a block diagram showing a cylindrical workpiece according to the present invention. Partially cutaway plan view showing the setting state of the object fixing device, (b)
FIG. 3 is a partially cutaway side view showing a setting state of a cylindrical workpiece fixing device according to the present invention, and FIG. 3 is an AA showing a setting state of the cylindrical workpiece fixing device according to the present invention. FIG. 4 is an enlarged cross-sectional explanatory view, FIG. 4 is a perspective view for explaining a configuration of a main part of a butting positioning device, and FIG. 5 is a perspective view showing a conventional example in which a reinforcing rib for preventing bending or the like during machining is attached. FIG. 6 is a perspective view, and FIG. 6 is an explanatory view showing another example when a fixed reference surface is provided.

A description will be given below with reference to the drawings.

In FIGS. 2A and 2B, the jig base is
A tubular body (stretch) that forms a square pipe on which the jig base is to be machined, having support portions at both ends, one support portion having a pivot axis, and the other support portion having a fixture. St
It can be opened and closed around the pivot axis to be inserted into the inside.

After the jig base is inserted and installed in the stretch St forming the square pipe, a plurality of internal cylinders provided on the left and right sides in the longitudinal direction of the jig base by the action of an electromagnetic pilot switching valve (solenoid valve) of a control system. Group 2 _in 1-2 _in n
(1 to n pieces), and external cylinder groups 2 _out 1 to 2 _out n arranged opposite to the clamp portion 1 of the internal cylinder 2
The (1 to n) clamps 1 perform a clamping operation (gripping operation) to appropriately and firmly hold the stretch St to be processed from inside and outside, and finish processing by a milling machine or the like as desired. It is configured so that it can be implemented.

A drive circuit may be selected for the control system in accordance with appropriate conditions such as hydraulic pressure and pneumatic pressure.

The operation will be described below with reference to the configuration and the drawings.

For example, in a plate processing machine such as a press brake.
Left and right positioning of the butting positioning device B / G used
The straightness of the cylindrical body which becomes the stretch St for movement
When finishing with a milling machine
FIG. 2 shows a jig base of the apparatus for fixing a cylindrical workpiece according to the present invention.
(B) As shown in FIG.
Swivel to open one side, and from the opened fixture side,
Insert the tubular body that will be the stretch St to be worked on,
After the insertion, stretch St together with the jig base
The lower side of the back stretch touches and supports the stretch support
Then, the jig base is fixed by the jig base fixture.
Then, as shown in FIG. 2 (a) and FIG.
2_in1-2_inExternal cylinder group 2 according to the arrangement of n_out 
1-2_{ou t} n, drive the hydraulic pump, and
Hydraulic series through an ilot switching valve (solenoid valve)
The fluid cylinder 2 composed of
The lamp unit 1 is made to protrude at the same time as
Stretch St to be machined properly from inside and outside
It is held and milled or otherwise machined.

When the desired machining is completed, the clamp portion 1 retreats into the fluid cylinder 2 by the action of the electromagnetic pilot switching valve (solenoid valve) of the control system, and then the fixture of the jig base is removed. By turning the jig base, the fixture side is opened, the processed stretch St is removed, and the jig base can be mounted on the butting positioning device.

That is, since the inner and outer cylinder groups constituted by the fluid cylinders function as "reinforcing ribs", the bending of the stretch due to the load at the time of finishing by a milling machine or the like can be prevented. It is possible to complete a stretch with no high precision.

As shown in FIG. 6, by eliminating one side of the external cylinder group and using a fixed reference plane, it is possible to improve the positioning accuracy of the cylindrical body. good.

[0023]

As described above, according to the present invention,
The tubular body can be fixed with an even clamping force in the longitudinal direction of the tubular body without applying an excessive load to the tubular body during processing of the tubular body to be stretched, and finally unnecessary reinforcement Work such as welding and attaching ribs can be saved,
This has the effect that the cost of stretching can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an overall configuration example including a hydraulic circuit and a control system of a fixing device for a cylindrical workpiece according to the present invention.

FIG. 2A is a partially broken plan view showing a setting state of a fixing device for a cylindrical workpiece according to the present invention, and FIG.
Partially cutaway side view showing a setting state of a fixing device for a cylindrical workpiece according to the present invention.

FIG. 3 is an enlarged explanatory sectional view taken along the line AA showing the setting state of the fixing device for the cylindrical workpiece according to the present invention;

FIG. 4 is a perspective view for explaining a configuration of a main part of a butting positioning device.

FIG. 5 is a perspective view showing a conventional example in which a reinforcing rib for preventing bending or the like during machining is attached.

FIG. 6 is an explanatory view showing another example when a fixed reference plane is provided.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Clamp part 2 Fluid cylinder 2 _in 1-2 _in n Internal cylinder group 2 _out 1-2 _out n External cylinder group B / G Butt positioning device St Cylindrical body (stretch)

Claims (5)

[Claims] 1. A fixing device for use in machining a cylindrical workpiece that forms a stretch that serves as a guide for laterally moving and positioning an abutting positioning device used in a plate material processing machine such as a press brake. Comprising a plurality of fluid cylinders, comprising a plurality of fluid cylinders, and a control system for driving and controlling the plurality of fluid cylinders, dividing the plurality of fluid cylinders into two systems, an internal cylinder group and an external cylinder group, Based on a command from the control system, the clamp portion can be freely retracted and clamped / unclamped for the cylindrical body to be machined, and the internal cylinder group is placed inside the cylindrical body during machining of the cylindrical body. The external cylinder group is appropriately disposed around the outer periphery of the cylindrical body, and the cylindrical body is fixed and held appropriately and firmly during machining. An apparatus for fixing a cylindrical workpiece. 2. The internal cylinder group is disposed symmetrically at a desired pitch on both left and right sides of a cylindrical body serving as a jig base extending in a longitudinal direction, and the internal and external cylinder groups are mutually connected via a clamp portion. 2. The fixing device for a cylindrical workpiece according to claim 1, wherein the fixing device is configured so as to be able to appropriately and firmly hold a stretch to be processed from inside and outside. 3. The fixing device for a cylindrical workpiece according to claim 1, wherein a hydraulic circuit is used for the control system. 4. The fixing device for a cylindrical workpiece according to claim 1, wherein a drive control of the fluid cylinder is performed by using a solenoid valve circuit as a control device of the control system. 5. A method for fixing a cylindrical workpiece, which forms a stretch serving as a guide for horizontal movement positioning of a butting positioning device used in a plate material processing machine such as a press brake, at the time of processing, wherein a clamp portion is provided. A plurality of fluid cylinders having a plurality of fluid cylinders are arranged symmetrically at a desired pitch on both left and right sides of a jig base extending in the longitudinal direction to form an inner cylinder group, and an outer cylinder group is arranged around the inner cylinder group. A control system for driving and controlling the inner and outer cylinder groups is provided. These cylinder groups are divided into two systems, inner and outer, and a clamp section can be freely retracted and retracted based on a command of the control system so that a workpiece can be clamped and unclamped. When machining a workpiece, the internal cylinder group is inserted and disposed inside the cylindrical workpiece, and the external cylinder group is appropriately disposed around the outside of the workpiece. And fixing the workpiece properly and firmly during machining.