JPH08206926A - Work pressure contact working method in composite work machine tool - Google Patents

Abstract

PURPOSE: To successively perform finishing work after works are integrally formed by working the works brought into pressure contact on the side of main spindle stands holding the integrally formed work. CONSTITUTION: Works W1 and W2 are gripped by chucks 3a and 3b of a first main spindle stand 2a and a second main spindle stand 2b, and the works W1 and W2 are worked. A main spindle of the first main spindle stand 2a and a main spindle of the second main spindle stand 2b are opposed to each other, and rotate in the opposite direction. Next, the second main spindle stand 2b is moved, and end surfaces of the works are brought into pressure contact with each other, and are integrally formed. Next, a grip of the work W1 by the first chuck 3a on the main spindle stand 2a side is released, and the works brought into pressure contact are moved in the direction for separating from the first main spindle stand 2a. Next, deburring B work and finishing work of the works, brought into pressure contact on the side of the second main spindle stand 2b holding the work brought into pressure contact, are performed by using a second cutter stand 5b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work pressure welding method for a composite machining machine tool, and more particularly to a machine tool having two spindles or a main spindle and a sub spindle.
The present invention relates to a work pressure welding method for a combined machining machine tool in which two workpieces (workpieces) that have been machined are respectively held by opposing spindles to perform pressure welding of the two workpieces and perform machining of integrated workpieces.

[0002]

2. Description of the Related Art Welded work pieces that have been machined by NC lathes or the like, or integrate the work pieces with a dedicated pressure welding machine, and then finish the work pieces that have been integrated with the NC lathe machine or the like. There is a processing method to make it. On the other hand, as a method of machining and integrating with one machine tool, in Japanese Unexamined Patent Application Publication No. 1-171735, "Working method of work in combined machining machine tool", a joint portion (male screw, A method has been proposed in which an internal thread is formed, and the headstock being gripped is relatively moved to approach it, and the work is screwed to integrate the assembled work. Further, in Japanese Patent Application Laid-Open No. 1-281836 “Holding method of work during heating and work holding jig used for the working”, the work of the concave portion is heated among the work whose end portions are made uneven, and this concave portion is heated. A method has been proposed in which a work is integrated by inserting a convex portion into the and performing shrinkage fitting (shrink fitting).

[0003]

By the way, in the case of integrating works by screwing as in the conventional case, it is necessary to form a connecting portion (male screw, female screw) in each work, and the connecting portion is formed. However, there is a problem that the machining time becomes longer and the work becomes larger. Also, when integrating by shrinkage fitting (shrink fitting), not only the number of steps for forming the uneven portion is required, but also a means for heating the work, a heat radiating means for radiating the amount of heat accumulated in the work holding jig, etc. There is also a problem in that it is necessary to provide the machine with means that are not originally necessary. The present invention has been made to solve the above-mentioned problems, and the work can be performed without removing the work from the machine tool once and without performing screw processing or uneven processing on the joint between the works. It is an object of the present invention to provide a work pressure welding method in a combined machining machine tool that can be integrated and can be subsequently subjected to finish machining.

[0004]

In order to solve the above-mentioned problems, the present invention has a base, and the base has first and second parts.
First and second headstocks for rotatably supporting the respective main spindles are provided so as to be relatively movable in the main spindle axis direction.
And a machining method in a combined machining machine tool provided with work holding means so as to face the end portions of the second spindle, respectively, holding the work in the respective work holding means of the first and second headstocks. , A step of machining each work, and rotating the respective spindles of the first and second headstocks in opposite directions while facing each other, and at least one of the first and second headstocks. The step of moving the headstock relatively in the spindle axis direction so that the works are pressed by a predetermined amount, and press-contacting the end faces of the works, and the rotation of each of the first and second headstock spindles. The step of stopping and the work holding means on either the first headstock side or the second headstock side is released, and the pressed work separates from the released headstock. From at least one of the first headstock side and the second headstock side, and the step of processing the press-worked work on the headstock side holding the work. The present invention provides a work pressure welding method for a multi-task machine tool. Further, according to the present invention, in the step of press-contacting, the condition of the press-contacting is commanded by a spindle speed, a pushing margin, and a headstock feed speed, and the workpiece press-contacting method in the multi-task machine tool according to claim 1. It was done.

[0005]

With the above construction, since the workpieces gripped by the opposing spindles in the multi-tasking machine tool are machined respectively, the workpieces can be pressed together to machine the integrated workpieces. Work can be integrated reliably and in a short time without removing it from the machine and without screwing or processing uneven parts on the joint between the works, and after the integration, finish processing can be continued. . That is, since a series of processes of machining, press contact, and machining can be easily performed while holding the workpiece on the multi-tasking machine tool, a large number of process integration can be achieved.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a work pressure welding method for a combined machining machine tool according to the present invention will be described with reference to the drawings. FIG. 1 is a flow chart of a work pressure welding process according to the present invention. FIG. 2 is an explanatory view of the work machining process of the present invention.
1 is a multi-tasking machine tool. 2a is the first headstock, 2b
Is a second spindle headstock, and rotatably supports the first spindle 7a and the second spindle 7b, respectively. Reference numeral 3a is a first work holding means (first chuck) provided at the front end of the first spindle 7a, and holds the first work W ₁ . 3b is the second spindle 7b
The second work holding means (second chuck) provided at the front end of the second work grips the second work W ₂ . 5a is a first tool post for mounting a tool and processing the first work W ₁ , 5b
Is a second tool post for mounting a tool and processing the second work W ₂ . The first tool rest 5a moves with respect to the spindle 7a in the spindle axis direction (Z ₁ direction) and in the X ₁ direction orthogonal to the Z ₁ direction by a servo motor, a ball screw, or the like not shown. Second
The headstock 2b in the spindle axial direction (Z ₂ direction), the servomotor second tool rest 5b are not shown in the X ₂ direction perpendicular to the Z ₂ direction, to move the ball screw or the like. Combined processing machine tool 1
Is capable of processing the first work W ₁ by the first turret 5a and the second work W ₂ by the second turret 5b simultaneously or separately. FIG. 3 is an explanatory diagram of the pressure welding step of the present invention, and FIG. 4 is an explanatory diagram of finishing processing after the work is integrated. 3 and 4 have the same contents as those in FIG. 2, the same reference numerals are given.

Next, the operation of the present invention will be described with reference to the flow chart of the work pressure welding process of FIG. 1st headstock 2
a and chucks 3a and 3 of the second headstock 2b, respectively.
Hold workpieces W ₁ and W ₂ on b and
₁ and W ₂ are processed using the first turret 5a and the second turret 5b (step S1). First headstock 2a and second
Each spindle of the spindle stock 2b is rotated in the same direction (arrow direction in FIG. 3). That is, the spindle of the first headstock 2a and the second spindle
The headstock 2b and the main spindle of the headstock 2b face each other and rotate in the opposite direction (step S2). Then, the second headstock 2
Move b. Then, the workpiece end faces are pressed against each other and integrated (step S3). When pressure contact is performed as shown in FIG. 3, burrs B are generated on the pressure contact surface. For example, diameter 15
When pressing a stainless steel round bar work of about mm, the spindle of the first headstock 2a is rotated at 400 rpm and the spindle of the second headstock 2b is rotated at 5000 rpm,
The pressing force (thrust) of the first headstock 2a is about 350 kg. This pressing time is about 10 seconds. In addition,
The pressing force is 20 m of the feed rate of the moving shaft (second headstock 2b).
It can be obtained under the conditions of m / min and a pressing margin of 2 mm. It should be noted that the numerical values of the spindle rotational speed and the thrust (feed speed, pushing margin) are merely examples, and are not limited to the numerical values of each condition. That is, the numerical value of each condition is changed at any time depending on the material of the work, the pressure contact area, the bonding strength, etc.
The pressure welding step may be performed.

Next, the spindle of the first headstock 2a is set to free run (step S4), and the first and second headstocks 2a, 2a,
The rotation of each spindle 2b is stopped (step S5). First
The gripping of the work W ₁ by the first chuck 3a on the headstock 2a side is released, and the pressed work is moved in a direction away from the first headstock 2a (step S6). Then, as shown in FIG. 4, a burr B removing process and a finishing process of the work pressed against the second headstock 2b side holding the pressed work are performed using the second tool rest 5b (step S6), the process of the present invention ends. The combined machining machine tool of the present invention may be a machine tool having a main spindle, a sub-spindle, and a tool rest. The work held by the main spindle side chuck and the work held by the sub-spindle side chuck may be subjected to the pressure welding step. In addition, the second headstock 2
Although b is explained as a moving machine tool, it is not limited to this. It suffices that the first main spindle and the second main spindle or the main main spindle and the sub main spindle are relatively movable in the main spindle axis direction.

[0009]

As described above, according to the present invention,
In a multi-tasking machine tool, the workpieces gripped by the opposing spindles are machined, respectively, and then the workpieces are pressed into contact with each other, so that the integrated workpieces can be machined. The workpieces can be integrated reliably and in a short time without performing screwing or unevenness processing on the joint between the workpieces, and after the integration, finishing can be continued. That is, processing →
Since a series of processes from pressure welding to machining can be easily performed while holding the workpiece on the multi-tasking machine tool, a large number of process integrations can be achieved.

[Brief description of drawings]

FIG. 1 is a flow chart of a work pressure welding process in a combined machining machine tool of the present invention.

FIG. 2 is an explanatory diagram of a work processing step according to the present invention.

FIG. 3 is an explanatory diagram of a pressure welding step of the present invention.

FIG. 4 is an explanatory diagram of processing (finishing) after integrating the workpieces.

[Explanation of Codes] 1 ... Multi-task machine tool 2a ... 1st spindle stock 2b ... 2nd spindle stock 3a ... 1st work holding means (1st chuck) 3b ... 2nd work holding means (2nd chuck) 5a ... 1 tool post 5b ... second tool rest 7a ... first spindle 7b ... second spindle W ₁ ... first work W ₂ ... second work

Claims (2)

[Claims] 1. A substrate is provided with a first substrate and a second substrate.
First and second headstocks for rotatably supporting the respective main spindles are provided so as to be relatively movable in the main spindle axis direction.
And a machining method in a combined machining machine tool provided with work holding means so as to face the end portions of the second spindle, respectively, wherein the work is held by the respective work holding means of the first and second headstocks. , A step of machining each work, and rotating the respective spindles of the first and second headstocks in opposite directions while facing each other, and at least one of the first and second headstocks. A step of moving the headstock relatively in the spindle axis direction so that the works are pressed by a predetermined amount, and press-contacting the work end surfaces with each other; and rotating the respective spindles of the first and second headstocks. The step of stopping and the work holding means on either the first headstock side or the second headstock side is released, and the press-contacted work is separated from the released headstock. Moving at least one of the first headstock side and the second headstock side in the direction, and processing the pressure-welded work on the headstock side holding the work. A work pressure welding method for a multi-task machine tool, comprising: 2. The work pressure welding method for a multi-task machine tool according to claim 1, wherein, in the pressure welding step, the pressure welding condition is instructed by a spindle rotation speed, a pushing margin, and a headstock feed speed.