JPS587421B2 - netsushiyorisouchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus in which heat treatment operations are controlled by a numerical control device, and which performs both machining and heat treatment operations on various workpieces.

Conventional machines that heat and forge wire rods as a combination of a processing machine and a heat treatment device, and a machine that injects an electrolytic solution onto the workpiece during cutting, and generates a discharge by passing an electric current between the workpiece and the discharge heating. Machines that perform heat treatment are known.

However, in a heading machine for wire rods, the workpieces and heating positions are limited.

Furthermore, methods using electrolytic solutions have the disadvantage that it is difficult to heat treat only a portion of the workpiece.

The object of the present invention is to perform mechanical processing on various workpieces and to automatically perform heat treatment on required portions of the workpieces under control using a numerical control device.

Another purpose is to automatically replace the heat treatment head according to the size and shape of various workpieces, thereby providing a diversified device.

Next, embodiments will be described with reference to the drawings.

In Fig. 1, a stocker 2 for materials, a lathe 3, and an intermediate processing machine 7 (when processing a shaft object, center drilling for grinding, key groove processing in the intermediate process between turning and final grinding) , a machine that performs processing as necessary, such as notch processing, is called an intermediate processing machine), a dimension measuring device 13, and a grinding machine 15.
and product stocker 18 and workpiece conveyance device 4, 6, 11,
12 and a control device for these machines, such as a numerical control device 16
and an electronic computer 17 are arranged.

Workpiece 1 sent to lathe 3 from material stocker 2
It is turned at this point and transferred to relay position 5 by unloader 4.
carried to.

At relay position 5, workpiece 1 is loaded onto loader 6 for intermediate processing machine 7.
give.

The loader 6 sends the received workpiece 1 to the support device 47 of the intermediate processing machine 7.

As shown in FIG. 3, this support device 47 can vertically support the workpiece 1, rotate the supported workpiece 1, and perform index positioning.

The turret tool rest of the intermediate processing machine 7 is arranged opposite to this support device 47, and has a revolving body 10 having a plurality of tool mounting surfaces.

This revolving body 10 is equipped with a heat treatment device, such as a coil 30 for induction hardening, in addition to a tool 19 for cutting the workpiece 1.

The revolving body 10 can rotate and index necessary tools or heat treatment equipment to the processing position.

Further, the turret tool rest is configured to be able to move forward and backward relative to the workpiece 1 supported by the support device 47, and to be movable parallel to the workpiece axis, so that it can be rotated or indexed, and the rotating body of the turret tool rest can be The turret is moved relative to the workpiece under the control of the numerical control device 16 to selectively index the desired location on the workpiece, and machining and hardening operations can be performed.

Thereafter, the workpiece is taken out from the intermediate processing machine 7 by the unloader 11 and placed on the conveyor 12.

The workpiece carried by the conveyor 12 has its dimensions measured by a dimension measuring device 13, and is then set on a grinding machine 15 by a loader 14.

After the grinding process, the workpiece is taken out by the loader 14, its dimensions are again measured, and the workpiece is sent to the product stocker 18 by the conveyor 12.

Each machine that performs these series of processing and the device that transports the workpiece is operated by a numerical control device 16, but an electronic computer 17 centrally controls this numerical control device.
is installed.

Note that a control device having a function similar to that of an electronic computer may be used, and it is also possible to perform not only quenching but also other heat treatments such as tempering and partial annealing by changing the heating temperature and cooling method. Furthermore, a forging machine can also be included in the series of mechanical devices.

In FIGS. 2 and 3, the center support device 4 for the workpiece 1
Reference numeral 7 may be a chuck, which grips the workpiece with claws 48 as shown in FIG. 3, and is also capable of rotation and indexing to the required angular position.

The rotating body 10 of the turret tool post is attached to the intermediate processing machine 7 and performs back-and-forth movement to approach and retreat from the workpiece 1, movement in the axial direction of the workpiece, and rotational indexing (including clamping) movement. It can be done.

On each tool mounting surface of the rotating body 10 of the turret tool post, machining tools 19, such as drills, end mills, milling cutters, etc., driven by a power source (not shown) are mounted on tool holders 1.
It is installed with 9.

In addition, a reversing device 20 for the workpiece 1 and an induction hardening head 21 that can be joined to a conductive part of a high frequency power supply device, which will be described later, are replaceably attached.

Note that the head 21 refers to everything including a substrate 29, a lead plate 31, a coil 30, and a shut 34, which will be described later.

After the workpiece 1 mounted at a predetermined position by the support device 47 is processed by the necessary tool 19, the induction hardening head 21, which is indexed to the same processing position, is hardened at the required location under the control of the numerical control device.

The induction hardening head 21 is the rotating body 10 of the turret tool post.
A plurality of them are attached to the workpiece 1, and the necessary one can be automatically determined and replaced according to the shape and size of the workpiece 1.

In this case, the structure is such that the induction hardening head 21 is energized and water is supplied for cooling only to the head 21 at a predetermined position.

Its structure will be explained with reference to FIG.

The rotating body 10 of the turret tool post has a fixed shaft (not shown) in the center thereof, and is configured to rotate around this fixed shaft.

A disk-shaped fixed plate 22 connected to the fixed shaft is connected to the rotating body 1
This fixed plate 22 has a radial water supply passage 27 that is opened at one location on the side surface on the processing position side.
have.

A ring 23 is rotatably attached around the fixed plate 22 while maintaining a seal against cooling water.

A bifurcated forked hawk 24 is attached to one location on the lower surface of the ring 23, and engages with a pin 25 protruding from the upper surface of the rotating body 10 while sandwiching the pin 25.

Therefore, when the revolving body 10 turns, the ring 23 is also rotated along with it.

The same number of cooling water passages 26 are radially bored in the ring 23 in correspondence with the tool mounting surface of the revolving body 10, and depending on the rotation when the revolving body 10 is indexed, one of the plurality of cooling water passages 26 is bored. Only the cooling water passage 26 indexed to the processing position communicates with the water supply passage 27 of the fixed plate 22.

Further, each of the cooling water passages 26 of the ring 23 is connected to a flexible tube (not shown), and this tube is connected to each tool holder 19 attached to the tool attachment surface of the revolving body 10.
It extends along the side of the tool to near the tip of the tool.

The structure of the induction hardening head 21 attached to the tool attachment surface of the revolving body 10 is as shown in FIG. 2 and FIG. An insulating plate 45 having a T-shaped cross section is attached to the outer side of the rising part of the insulating plate 45.
The substrates 29a and 2 of the induction hardening head 21 are divided into two parts.
9b is attached, and the boards 29a, 29b on both sides
The insulating plate 45 is in a closed state.

The substrates 29a and 29b have a shape as shown in FIG.

Further, lead plates 31a and 31b are removably attached to the missing parts of the substrates 29a and 29b on both sides, respectively.

The two legs of the hardening coil 30 are attached to each lead plate 31 while straddling these two lead plates 31a and 31b.
a and 31b.

As shown in FIG. 4, the coil 30 has an arcuate spiral shape facing the cylindrical workpiece, and one coil can be adapted to a certain extent for workpieces of different thicknesses.

These hardening heads 2 are attached to the rotating body 10 of the turret tool post.
1 are attached at a plurality of locations and are used for turning and indexing as necessary. However, if a coil of a different shape is required, only the lead plates 31a and 31b can be replaced.

At this time, the coil 30 is removed from the joint 32.

As shown in FIG. 3, a joint 33 is attached to the cooling water passage 26 of the ring 23 at a position corresponding to the induction hardening device.

A U-shaped jacket 34 that surrounds the workpiece is connected to this joint 33.

Further, the joint 33 is integrally attached above one of the substrates 29a.

It is connected to a communicating hole in the copper piece 40a, and the other mouth of this communicating hole is connected to the leg joint 32a of the coil 30.

Furthermore, the other leg joint 32b of the coil 30 has a copper piece 40b integrally attached above the other board 29b.
It is connected to the lower opening of the.

The other opening communicating with the lower opening of this copper piece 40b opens at the upper part of the copper piece 40b.

Therefore, the cooling water sent to the joint 33 is
At the same time, it passes through one copper piece 40a and circulates inside the coil 30 from the joint 32a to cool the coil itself.

The cooling water in this coil 30 then reaches the lower opening of the other copper piece 40b from the other joint 32b, passes through the channel in the copper piece 40b, and is discharged from the upper opening 40c of the copper piece 40b.

This water is directly applied to the substrate 29b, lead plates 31a, 31
b, and cools the substrates 29a, 29b and the lead plate 31.

A conductive member 35 is attached to the upper part of the fixed plate 22 on the processing position side via an elastic insulating member 35.

The lower part of the conductive member 36 is made particularly rigid in order to receive the force due to engagement with the induction hardening head 21 which is indexed and clamped.

A copper piece 38 having a power feeding convex portion 37 is attached.

Above the substrates 29a, 29b are the substrates 29a, 2.
Copper pieces 40a and 40b are integrally attached to 9b to provide rigidity.

The copper pieces 40a, 40b are provided with groove-shaped power receiving recesses 39 for receiving and engaging the protrusions 37.

The convex portion 37 and the concave portion 39 are adapted to engage when the induction hardening head 21 is indexed to a predetermined position by rotation indexing of the rotating body 10 of the turret tool post.

When performing rotation indexing, the rotating body 10 is first raised by an unclamping operation, and then rotated while maintaining this raised state.

When the turning is completed, the convex portion 37 fits into the concave portion 39, and then the rotating body 10 is lowered by a clamping operation.

The concave portion 39 is formed so that the concave portion 39 and the convex portion 37 do not interfere with each other when the turning is completed.

Furthermore, when the revolving body 10 completes its descent and the concave portion 39 and the convex portion 37 engage, the convex portion 37 is also formed in a dimension that allows it to be pushed down slightly in order to ensure contact and eliminate power supply loss. has been done.

When the convex portion 37 and the conductive member 36 are pushed down, the conductive member 36 is connected to the fixed plate 22 by an elastic insulating member 35 in order to absorb this amount of movement and prevent deformation of other members. It is installed by inserting the

The conductive member 36 is electrically connected to a current transformer box 41 fixedly placed on the back of the Klett tool rest.

In this case, the turret tool rest moves forward and backward and up and down with respect to the workpiece, so a fixed plate 22 is mounted on the upper part of the revolving body 10.
The conductive member 36 attached to will also move at the same time.

Therefore, in order to accommodate the vertical movement of the conductive member 36, two known rotatable joints 43 and 42 are provided at the upper and middle portions of the current transformer box 41.

In addition, in order to accommodate the forward and backward movement of the conductive member 36 with respect to the workpiece, an expandable and retractable member is provided by slidably fitting two sliding members 42a and 43a between the two joints 42 and 43. It uses a nesting mechanism.

Further, a pipe 44 for cooling the conductive members 36 is attached around the conductive members 36, and is covered with an aluminum cover 49.

This conductive member 36 and the copper piece 38 are composed of two plates with an insulating plate 45' inserted in the center and sandwiching the insulating plate 45' from both sides in order to conduct electricity between positive and negative poles. .

When the induction hardening head 21 attached to the rotating body 10 is indexed and positioned by indexing the rotating body 10, the insulating plate 45' of the conductive member 36 and the insulating plate 45 of the induction hardening head 21 are They are configured so that the directional phases match.

Furthermore, shielding plates 46 for preventing cooling water from scattering are attached to both outer sides of the jacket 34.

The workpiece 1 having the above structure is sent from the loader 6 to the support device 47 of the intermediate processing machine 7, and is supported vertically by the support device 47, and is rotated or angularly indexed by commands from the control device 16.

Then, in response to a command from the control device 16, the rotating body 1 of the turret tool post is
0 is pivoted and the required machining tool 19 is brought into the machining position.

At this time, the control device 16 is instructed to operate a cooling water device (not shown), and cooling water is jetted from the flexible tube toward the tool indexed to the processing position.

Next, the turret tool rest moves forward with respect to the workpiece 1, and cutting is performed.

After various cutting processes are performed by moving the turret tool rest back and forth and indexing the rotating body 10 in this way, the rotating body 10
When the induction hardening head 21 is indexed and positioned at the processing position by the rotation indexing, the induction hardening head 21
The cooling water passage 26 of the ring 23 corresponding to the cooling water passage 26 communicates with the water supply passage 27 of the fixed plate 22, and
Cooling water spouts out from the top of a.

Further, when a confirmation signal for indexing the induction hardening head 21 to the processing position is sent to the control device 16, the control device 16 sends a command to the current transformer box 41 to energize it.

Thereafter, the induction hardening head 21 performs rotary hardening of the workpiece and fixed position hardening by indexing the angle of the workpiece while controlling its approach to the workpiece 1, hardening feed rate, axial movement, etc., by the control device 16.

In addition, when hardening parts of a workpiece that differ greatly in size and shape, the quenching head 21 having the hardening coil 30 corresponding to the size and shape of the workpiece can be indexed and replaced by rotating and indexing the rotating body 10 of the turret tool rest. Then, perform the quenching work.

As described above, since changes in the relative relationship between the workpiece and the heat treatment head are controlled by a numerical control device, it is possible to partially harden any part of the workpiece, and in addition, the positioning of the hardening coil with respect to the hardened area and the hardening speed can be adjusted. can be easily and reliably controlled, allowing accurate and efficient hardening.

In addition, it is possible to automatically index and replace machining tools and hardening coils with numerical values corresponding to various workpieces, making it possible to perform machining and heat treatment at the same position in the machining flow, reducing idle time without changing the work flow. The improvement in work efficiency is extremely large.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a diagram showing centralized control of multiple machine tools, Fig. 2 is a plan view of the turret revolving body, and Fig. 3 is a partially sectional view with the cover removed. FIG. 4 is a three-dimensional view of the quenching coil, and FIG. 5 is an enlarged plan view of the main parts, with cooling water passages omitted. FIG. 6 is a perspective view of the substrate 29b. 1... Workpiece, 3... Lathe, 10...
...Turret tool post rotating body, 15...Grinding machine, 16...Numerical control device, 17...
・Electronic computer, 19... Processing tools, 21...
...Heat treatment (induction hardening) head, 47...
・Workpiece support device.

Claims (1)

[Claims] 1. A rotating body is mounted on each of a plurality of tool mounting surfaces and can be rotated and indexed, and has cooling water means for communicating cooling water to the tool indexed to the processing position. In a numerically controlled machine tool equipped with a turret tool post that is movable in the axial direction of the workpiece and that is movable in the axial direction of the workpiece, at least one of the plurality of tool mounting surfaces of the revolving body is An induction hardening head 21 has a hardening coil 30 attached to one location, and is attached to the induction hardening head 21 so as to surround the hardening coil 30, and when the hardening head 21 is indexed to a processing position, the cooling A jacket that communicates with the water means and spouts out cooling water is attached to the non-rotating part of the turret tool post via an elastic insulating member 38, and is indexed to the processing position by rotation indexing of the rotating body 10. a conductive member 36 that engages with the induction hardening head 21;
Without removing the workpiece 1 once attached to the support device 47, the rotating body 10 is rotated and indexed to replace the cutting tool 19, the induction hardening head 21 is indexed to the machining position, and the cutting process is continued. A numerically controlled machine tool that can perform heat treatment on any part of a workpiece.