JPH09157753A - Work supporting mechanism used for quenching device for long-sized work and quenching device for long-sized work using the work supporting mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to execute quenching of a long-sized work from one end to the other end over the entire length. SOLUTION: The work supporting mechanism for rotatably supporting the long-sized work W has a first chuck 110L for holding one end WA of the long- sized work W, a second chuck for holding the other end WB of the long-sized W and supporting rollers for supporting the long-sized work W in midway. The first chuck is constituted not to hold the long-sized work W when the second chuck 110R holds the other end WB of the long-sized work W and the part to be held by the first chuck 110L is quenched. The second chuck 110R is constituted not to hold the long-sized work W when the first chuck 110L holds one end of the long-sized work W and the part held by the second chuck 110R is quenched.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a workpiece supporting mechanism used in a quenching device for a long workpiece capable of quenching from one end to the other end of a long workpiece, and a long workpiece using this supporting mechanism. Work hardening device

[0002]

2. Description of the Related Art A work supporting mechanism used in a conventional quenching apparatus for a long work will be described with reference to FIG. The quenching device for a long work is a device for forming a hardened layer on the surface of a long work such as a shaft or a ball screw. As shown in FIG. 6, a conventional long work quenching apparatus includes a work support mechanism 500 that rotatably supports a long work W. The work support mechanism 500 includes a chuck 510 that holds one end WA of a long work W, a work center 520 that supports the other end WB of the long work W, and the chuck 5 described above.
And a motor 530 that rotationally drives 10.

The chuck 510 is provided at the tip of the output shaft 531 of the motor 530, and the grip claw portion 511 is opened and closed by a hydraulic mechanism (not shown). Also,
The work center 520 faces the chuck 510 and supports the long work W together with the chuck 510.

[0004]

In the above-mentioned conventional work supporting mechanism, it is difficult to quench the supported long work W from one end WA to the other end WB. That is, in order to perform quenching from one end WA to the other end WB of the long work W, that is, the entire length, it is necessary to heat the entire length with the heating coil. This is because the WA is gripped by the chuck 510 and therefore that portion cannot be heated. Further, since both ends WA and WB of the long work W are always supported, there is a problem that the long work W is distorted due to expansion of the long work W due to heating.

The present invention was devised in view of the above circumstances, and is a work supporting mechanism used in a quenching device for a long workpiece capable of quenching a long workpiece from one end to the other end, that is, the entire length. Another object of the present invention is to provide a quenching device for long workpieces using this support mechanism.

[0006]

A work support mechanism used in a quenching apparatus for a long work according to the present invention is a work support mechanism for rotatably supporting a long work, and one end of the long work is A first chuck for gripping, a second chuck for gripping the other end of the long work, and a support roller for supporting the long work in the middle are provided, and the first chuck is the second chuck. Holds the other end of the long work, and if the portion to be held by the first chuck is quenched, the long work is not held and the second chuck is One chuck holds one end of a long work piece, and does not hold the long work piece when quenching is applied to a portion held by the second chuck.

Further, a quenching device for a long work according to the present invention is a quenching device for a long work for quenching a long work, and a work support mechanism for rotatably supporting the long work. A heating coil for heating the long work, a cooling jacket for cooling a portion heated by the heating coil, and a moving mechanism for relatively moving the heating coil and the cooling jacket from one end to the other end of the long work. And the work supporting mechanism includes a first work holding mechanism for holding one end of a long work.
Of the first chuck, a second chuck that holds the other end of the long workpiece, and a support roller that supports the long workpiece in the middle thereof. When the other end of the work is gripped and the portion to be gripped by the first chuck is hardened, the long work is not gripped, and the second chuck is the first chuck. Is configured to hold one end of the long work and not hold the long work when the portion held by the second chuck is quenched.

[0008]

1 is a schematic configuration diagram of a work supporting mechanism used in a long work quenching apparatus according to an embodiment of the present invention, and FIG. 2 is a long view according to an embodiment of the present invention. FIG. 3 is a schematic configuration diagram for explaining the operation of the work supporting mechanism used in the work hardening apparatus, and FIG. 3 illustrates the operation of the work supporting mechanism used in the long work hardening apparatus according to the embodiment of the present invention. FIG. 4 is a schematic configuration diagram for explaining the operation of a work support mechanism used in the long workpiece quenching apparatus according to the embodiment of the present invention, and FIG. 5 is a schematic view illustrating the operation using this work support mechanism. It is a schematic perspective view of the heating coil used for the shaku work hardening apparatus.

The work supporting mechanism used in the quenching apparatus for a long work according to the embodiment of the present invention is a work supporting mechanism 100 for rotatably supporting the long work W, and one end of the long work W. When the WA or the other end WB is hardened, the long work W is supported by a portion other than the hardened portion.

First, the work support mechanism 100 includes a first chuck 110L for gripping one end WA of a long work W.
And a second chuck 110R that holds the other end WB of the long work W, and two support rollers 120L and 120R that support the long work W midway.

The first chuck 110L is provided at the tip of the output shaft 113L of the first motor 112L. The first chuck 110L is configured to open and close the grip claw portion 111L by a hydraulic mechanism (not shown). The first motor 112L is installed on the first slide base 114L. The first slide base 114L is configured to slide along the axis of the output shaft 113L by a hydraulic cylinder (not shown). Therefore, the first chuck 110
L is configured to slide along the axis of the output shaft 113L, that is, the axis of the long work W.

On the other hand, the second chuck 110R is provided at the tip of the output shaft 113R of the second motor 112R. The second chuck 110R is configured to open and close the grip claw portion 111R by a hydraulic mechanism (not shown). Also, the second motor 112R is
It is installed on the slide stand 114R. This second
The slide base 114R is configured to slide along the axis of the output shaft 113R by a hydraulic cylinder (not shown).

The first chuck 110L and the second chuck 110R are installed on one base 130. That is, as shown in FIG. 1, the first slide base 114L and the second slide base 114R face each other with a distance corresponding to the length of the long work W to be quenched. It is slidably installed on 130.

Between the first slide base 114L and the second slide base 114R and the base 130,
An absorption mechanism configured to move along the axial direction of the long work W is provided. This absorbing mechanism is for preventing the long work W from being distorted due to the expansion of the long work W.

The absorption mechanism is provided with the first slide base 11
4L and the base 130, the second slide base 114R
A play in the sliding direction is provided between the base 130 and the base 130, and the expansion of the long work W causes each slide table 114 to move.
It is configured to move L and 114R.

Two support rollers 120L are provided between the first slide base 114R and the second slide base 114L.
120R is provided. This support roller 120L,
120R supports the middle of the long work W to be quenched, and as shown in FIG. 1, two rollers 121 having the same diameter (only one is shown in FIG. 1). When,
It has a support base 122 that rotatably supports the roller 121.

The support rollers 120L and 120R are installed on the base 130, and the hydraulic cylinder 1
23L and 123R enable vertical movement. That is, the support rollers 120L and 120R
The long work W is supported in the raised state, and the long work W is not supported in the lowered state.

Next, the work supporting mechanism 10 as described above.
The configuration of the entire quenching device for long workpieces using No. 0 will be described with reference to FIGS. In addition to the above-described work supporting mechanism 100, this quenching device for long workpieces includes a heating coil 200 that heats a long workpiece W, and this heating coil 20.
Cooling jacket 300 for cooling the part heated by 0
And a moving mechanism 400 for moving the heating coil 200 and the cooling jacket 300 from one end WA of the long work W to the other end WB.

As shown in FIG. 5, the heating coil 200 is of a so-called semi-open saddle type that is capable of straddling a long work W. The heating coil 200 is, for example, a copper square pipe formed into a curved shape, and cooling water for cooling the heating coil 200 circulates inside.

The heating coil 200 includes a semi-circular heating conductor 210 having a substantially semi-circular shape, a pair of arc-shaped heating conductors 220 having a substantially 1/4 circular arc shape, and a pair of power feeds attached to the arc-shaped heating conductor 220. Conductor 230 and semi-circular heating conductor 210
And a pair of linear heating conductors 240 connecting the arc-shaped heating conductors 220 with each other.

On the other hand, the cooling jacket 300 is for injecting the cooling liquid L for cooling the long work W heated by the heating coil 200 onto the long work W, and is a storage tank at a high position (not shown). The cooling liquid L stored in is supplied.

The heating coil 200 and the cooling jacket 300 described above are attached to the moving portion 410 of the moving mechanism 400, as shown in FIG. This moving mechanism 400
Is a moving part 410 attached to the heating coil 200.
And a guide means 420 for guiding the moving part 410 from one end WA to the other end WB of the long work W, and the moving part 41.
Drive unit 430 for moving 0 along the guide means 420.

The heating coil 200 is a cooling jacket 300.
It is provided on the other end WB side of the longer work W. This is for quenching the long work W when the moving part 410 moves from the one end WA side of the long work W to the other end WB side. That is, the cooling liquid from the cooling jacket 300 is jetted to the portion heated by the heating coil 200.

Further, the moving means 410 has a guide means 4
A female screw 411 corresponding to the ball screw of 20 is formed. The driving unit 430 is configured to rotate the guide means 420, which is a ball screw, at a constant speed. The drive unit 430 is provided with a gear shift mechanism (not shown) so that the moving speed of the moving unit 430 can be appropriately changed depending on the size of the long work W or the like.

The operation of the quenching device for a long work thus constructed will be described. First, the long work W to be quenched is placed on the two support rollers 120L and 120R, and the long work W is moved by the second chuck 110R.
Grasp the other end WB. In this case, the first chuck 11
As shown in FIG. 2, 0L does not grip one end WA of the long work W, and the first slide base 114L is a predetermined distance between the first chuck 110L and one end WA of the long work W. Is retreating to a position that opens a space.

In this state, the second motor 112R is driven to rotate the long work W around the shaft center at a constant rotation speed. Therefore, the long work W is supported by the two support rollers 120L and 120R and is rotationally driven by the second motor 112R.

In this state, one end WA of the long work W is not gripped by the first chuck 110L, that is, is exposed. Here, the heating coil 200 is in a position to heat one end WA of the long work W. A high frequency current is supplied to the heating coil 200 from a high frequency power source (not shown) to heat one end WA of the long work W.

The moving mechanism 400 moves the moving section 410 from one end WA of the long work W toward the other end WB.
The cooling liquid L is jetted from the cooling jacket 300 toward the heated portion, that is, the one end WA of the long work W. As a result, one end WA of the long work W is quenched.

By moving the moving unit 410, the heating coil 2
When 00 is separated from one end WA of the long work W, the first chuck 110L holds one end WA of the long work W.
That is, the first slide base 114L advances toward the long work W, and one end WA of the long work W is gripped by the first chuck 110L.

In this way, the first chuck 110L
And second chuck 110R and two support rollers 120
The moving part 410 moves along the long work W supported by L and 120R, and the long work W is sequentially quenched. At this time, the second motor 112R is rotated in synchronization with the rotation of the first motor 112L.

When the heating coil 200 reaches the position of the supporting roller 120L, as shown in FIG.
The hydraulic cylinder 123L retracts 0L to a position where the long work W is not supported. This is because when the support roller 120L is in contact with the heated portion, it is not heated to a predetermined temperature and the cooling liquid L jetted from the cooling jacket is not disturbed. When this portion is quenched, the support roller 120L returns to the original position and supports the long work W again.

Further, the heating coil 200 is attached to the support roller 12
When reaching the 0R position, the support roller 120R is retracted by the hydraulic cylinder 123R to a position where the long work W is not supported. This is because when the support roller 120R is in contact with the heated portion, it is not heated to a predetermined temperature and the cooling liquid L jetted from the cooling jacket is not disturbed. When this portion is quenched, the support roller 120R returns to the original position and supports the long work W again.

When the moving part 410 moves to reach the other end WB of the long work W, the grip claw portion 111R of the second chuck 110R releases the long work W, and the second motor operates. Stop rotation drive. At the same time, the second slide base 114R is retracted by a hydraulic cylinder (not shown) to a position where the grip claw portion 111R does not contact the other end WB of the long work W.

The other end WB of the long work W is not gripped by the second chuck 110R as shown in FIG. 4, so that this portion can be heated by the heating coil 200. It has become. After heating the other end WB of the long work W in this state, the cooling jacket 300
Then, the cooling liquid L is injected to quench it.

In the above-described embodiment, the heating coil 20 is used.
0 and the cooling jacket 300 are moved by the moving mechanism 400, but the present invention is not limited to this. In short, the heating coil 200 and the cooling jacket 30
Since 0 means that it can be moved relative to the long work W, the heating coil 200 and the cooling jacket 300
May be fixed and the long work W may be moved. For this purpose, the base 130 itself in the above-described embodiment may be movable along the axis of the long work W.

If the heating coil 200 and the cooling jacket 300 are movable and the base 130 is movable, the moving distance between the two can be shortened, which is preferable.

Further, in the above-described embodiment, when quenching is performed in the middle of the long work W, the long work W is held by the first chuck 110L and the second chuck 110R. However, if both ends WA and WB are gripped, distortion may occur due to expansion of the long work W due to heating. Therefore, expansion of the long work W in the axial direction is absorbed and strain is generated. There is an absorption mechanism that prevents it from occurring.

As described above, in order to prevent the strain due to the expansion of the long work W from occurring, there are the following means in addition to the above-mentioned absorbing mechanism. That is, long work W
Both ends WA and WB are not gripped at the same time, and one of them is always in a free state (chuck 110L, 110
The state where it is not gripped by R) is set. Then, even if the long work W expands, one of them is free so that no distortion occurs.

[0039]

The work supporting mechanism used in the quenching apparatus for a long work according to the present invention is a work supporting mechanism for rotatably supporting a long work, and quenching the end of the long work. When it is applied, the long work is supported by the part other than the end part.

According to this work supporting mechanism, when quenching is applied to the end of the long work, the long work is supported by a portion other than the end, so that the long work is To the other end can be quenched.

The work supporting mechanism is a work supporting mechanism for rotatably supporting the long work, and holds the first chuck for holding one end of the long work and the other end of the long work. A second chuck and a support roller for supporting the long work in the middle are provided, and the first chuck is such that the second chuck holds the other end of the long work, and the first chuck When the portion to be gripped is hardened, the long work is not gripped, and the second chuck is such that the first chuck grips one end of the long work. When the portion gripped by the chuck is hardened, the long work is not gripped.

Therefore, even when one end or the other end of the long work is quenched, the long work is supported by the support roller. Therefore, support for long workpieces is sufficient,
Long work pieces are not distorted.

The work supporting mechanism is a work supporting mechanism for rotatably supporting a long work, and holds the first chuck for holding one end of the long work and the other end of the long work. The second chuck is provided with a support roller for supporting the long work in the middle thereof, and an absorption mechanism for absorbing expansion of the long work caused by heating the long work. Therefore, even if the long work is supported at one end and the other end, the long work is not distorted due to expansion accompanying heating of the long work.

On the other hand, this long work quenching apparatus is a long work quenching apparatus for quenching a long work, and includes a work supporting mechanism for rotatably supporting the long work, and a long work quenching device. A heating coil for heating the work, a cooling jacket for cooling the portion heated by the heating coil, and a moving mechanism for relatively moving the heating coil and the cooling jacket from one end to the other end of the long work. When the one end portion of the long work piece is quenched, the work supporting mechanism supports the long work piece at a portion other than the end portion. Therefore, according to the quenching device for a long work, quenching can be sufficiently performed from one end to the other end of the long work.

Further, the work supporting mechanism in the quenching apparatus for a long work has a first chuck for holding one end of the long work and a second chuck for holding the other end of the long work. A support roller for supporting the long work in the middle thereof, and the first chuck has a second chuck gripping the other end of the long work, and a portion to be gripped by the first chuck. When quenching is applied to the long work, the long work is not gripped, and the second chuck is gripped by the second chuck because the first chuck grips one end of the long work. It is configured not to grip the long work when the portion is quenched. Therefore, according to the quenching device for a long work, quenching can be sufficiently performed from one end to the other end of the long work.

Further, when the work supporting mechanism of such a long work quenching apparatus is provided with an absorbing mechanism for absorbing expansion of the long work caused by heating of the long work,
Even if the long work is supported by the one end and the other end, the long work is not distorted due to the expansion accompanying the heating of the long work.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a work support mechanism used in a quenching device for a long work according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram illustrating an operation of a work supporting mechanism used in the long work quenching apparatus according to the embodiment of the present invention.

FIG. 3 is a schematic configuration diagram illustrating an operation of a work support mechanism used in the long work quenching apparatus according to the embodiment of the present invention.

FIG. 4 is a schematic configuration diagram illustrating an operation of a work support mechanism used in the long work quenching apparatus according to the embodiment of the present invention.

FIG. 5 is a schematic perspective view of a heating coil used in a long work quenching apparatus using this work supporting mechanism.

FIG. 6 is a schematic configuration diagram of a work supporting mechanism used in a conventional quenching device for long work.

[Explanation of symbols]

 100 work support mechanism 110L first chuck 110R second chuck W long work WA one end (of long work) WB another end (of long work)

Claims (6)

[Claims] 1. In a work supporting mechanism for rotatably supporting a long work, when quenching is applied to an end of the long work, the work other than the end is used to support the long work. A work support mechanism used in a quenching device for long workpieces. 2. A work supporting mechanism for rotatably supporting a long work, a first chuck holding one end of the long work, a second chuck holding the other end of the long work, and a long work. A support roller for supporting the work in the middle thereof, and the first chuck has a second chuck that holds the other end of the long work, and When quenching is performed, the long work is not gripped, and the second chuck is a portion where the first chuck grips one end of the long work and is gripped by the second chuck. A work supporting mechanism used in a quenching device for long workpieces, characterized in that it does not grip a long workpiece when it has been quenched. 3. A work supporting mechanism for rotatably supporting a long work, a first chuck holding one end of the long work, a second chuck holding the other end of the long work, and a long work. 3. A quenching device for a long workpiece according to claim 1, further comprising: a support roller for supporting the workpiece in the middle thereof, and an absorption mechanism for absorbing expansion of the long workpiece caused by heating the long workpiece. Work support mechanism used for. 4. A quenching device for quenching a long workpiece, comprising a workpiece support mechanism for rotatably supporting the long workpiece, a heating coil for heating the long workpiece, and a heating coil for heating the workpiece. A cooling jacket for cooling the heated portion and a moving mechanism for relatively moving the heating coil and the cooling jacket from one end to the other end of the long work are provided, and the work supporting mechanism is provided for the long work. A quenching device for long workpieces, wherein when quenching is applied to one end, the long workpiece is supported by a portion other than the end. 5. The work supporting mechanism comprises: a first chuck for holding one end of a long work, a second chuck for holding the other end of the long work, and a support roller for supporting the long work midway. And the first chuck comprises:
When the second chuck holds the other end of the long work and the portion to be held by the first chuck is hardened, the long work is not held and the second work is performed. The chuck is characterized in that the first chuck holds one end of the long work piece and does not hold the long work piece when the portion held by the second chuck has been hardened. The quenching device for long workpieces according to claim 4. 6. The quenching device for a long workpiece according to claim 4 or 5, wherein the work supporting mechanism includes an absorbing mechanism that absorbs expansion of the long workpiece caused by heating the long workpiece. A quenching device for long workpieces.