JP2003247017A - Holder for heat treatment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a holder for heat treatment which unnecessitates any dimensional control of a holding member even in a supporting structure of multiple points exceeding three points, and be conveniently used for the heat treatment of a large thin-walled component. <P>SOLUTION: Balance type holding devices 12 (12A, 12B and 12C) are disposed at three points on a base 11. Each holding device 12 has a holding member 17 on both ends of a rocking arm 16, and rocks the rocking arm 16 according to the placement of a work W and brings all the holding members 17 on both ends into contact with a lower side of the work W, in particular, a part which is easily displaced by the self weight. Since the holding member 17 are reliably brought into contact with the work W even when the base 11 is thermally deformed, and adjustment of the height thereof is unnecessitated. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to quenching, tempering,
The present invention relates to a heat treatment jig used for various heat treatments such as solution heat treatment, annealing, and brazing.

[0002]

2. Description of the Related Art Generally, three-point support is effective for stably supporting a work as a product to be heat treated. For example, a thin large-sized part such as a die-cast aluminum body part (hereinafter referred to as a work). In the case of heat-treating (T6 treatment), since there is a risk that the workpiece deforms due to its own weight during the solution treatment, that is, so-called self-weight sag, it is necessary to support at more points. FIG. 8 shows a conventional heat treatment jig 1 used for T6 treatment of the work W, in which a large number (here, 6) of holding members 3 are arranged on a base 2 and the work is performed at multiple points. It has a structure that supports W.

[0003]

However, when the work W is supported at multiple points as described above, there is a possibility that all or some of the holding members 3 having more than three points do not come into contact with the work W. Conventionally, the respective holding members 3 are provided so that their heights can be adjusted, and their heights are adjusted so that all the holding members 3 contact the work W. In FIG. 8, the black-painted end face indicates the holding member 3 that requires height adjustment, that is, dimensional control. Conventionally, it takes a lot of man-hours and time to adjust them. , There was a problem. On the other hand, this type of heat treatment jig 1 is repeatedly used for heat treatment of the work W (T6 treatment),
Thermal deformation of the base 2 is unavoidable, and accordingly the holding member 3
The position (height) of will also change. For this reason, it is necessary to perform tedious dimension control for the holding member 3 every fixed number of times of use. However, when the work W is a die-cast aluminum body part, the required dimensional accuracy is about 0.5 mm, which is extremely strict. For this reason, this dimensional control occurs quite often, and this has been a major factor in raising the production cost. Incidentally, for example, Japanese Patent Laid-Open No. 56-165
In the 057 publication, a part of a holding portion (holding member) of a holding device arranged on a tray (base) is rotatably provided with respect to the tray, and other holding portions can be horizontally moved with respect to the tray. There is disclosed a heat treatment jig for suppressing the influence of thermal deformation of the tray on the holding member. However, since this heat treatment jig is provided in such a form that all of its holding members are directly placed on the tray,
When the tray deforms three-dimensionally, its installation height changes,
As a result, the above-mentioned dimensional control becomes necessary.

The present invention has been made in view of the above-mentioned problems of the prior art. The problem is that even if a supporting structure with more than three points is used, dimensional control of the holding member is unnecessary, and the thin wall It is to provide a heat treatment jig that can be conveniently used for heat treatment of large parts.

[0005]

In order to solve the above problems, the present invention provides a heat treatment jig in which a plurality of holding members for supporting a work are arranged on a base, and a part or all of the holding members are provided. It is characterized in that it is arranged on both ends of a swing arm provided on the base so as to be movable up and down. In the heat treatment jig configured as described above, the swing arm swings following the shape of the lower surface of the work, and the holding members at both ends of the swing arm reliably contact the work, so that dimensional control thereof is not necessary. The present invention may be configured such that at least one end of the swing arm is provided with a sub swing arm capable of swinging in the vertical direction, and holding members are arranged at both ends of the sub swing arm. In this case, , It is possible to support at more points. In the present invention, the swing arm and the sub swing arm may be balanced in a balance type. In this case, since the swing angle of the swing arm when the work is placed is small, The impact when the holding member comes into contact is reduced.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 and 2 show a first embodiment of the present invention. The heat treatment jig 10 according to the first embodiment is a heat treatment (T) of a work W, which is the thin and large die-cast aluminum body part described above.
6 processing), which supports the base 11 and the work W arranged at three positions on the base 11.
The base holding device 12 (12A, 12B, 12C) and three positioning means 13 (13A, 13B, 1) that are also arranged at three locations on the base 11 and position the work W.
3C).

Each holding device 12 has a column 14 standing on the base 11, a swing arm 16 supported on the column 14 by a shaft 15 so as to be vertically swingable, and the swing arm 16. And holding members 17 arranged at both ends of the. Here, the swing arm 16 is designed such that its longitudinal midpoint is supported by the shaft 15 so as to maintain a horizontal state at all times. Therefore, each holding device 12 is a dish of a general-purpose precision balance. It has a balance type structure in which a holding member 17 is arranged at a position. Each holding device 12 receives the work W on the holding members 17 at both ends of the swing arm 16, and at this time, the swing arm 16 swings in accordance with the shape of the lower surface of the work W, whereby the swing arm 16 moves. Holding members 17 at both ends of 16
Contacts the work W.

The holding device 12 is installed at the most stable position when the work W is supported at three points. In this case, the installation orientation of each holding device 12 is arbitrary, and is determined in consideration of the balance of the work W. In the first embodiment, one unit 12A of the holding devices 12 is arranged in the lateral direction of the work W, and the remaining two units 12B, 12C are arranged in the longitudinal direction of the work W. However, they may all be arranged in the same direction (short-side direction, long-side direction) or may be arranged inclined with respect to the short-side direction or the long-side direction. Further, the length of the swinging arm 16 that constitutes each holding device 12 is determined so that at least one or a plurality of the holding members 17 are located at a portion where the weight of the work W easily hangs.

On the other hand, the positioning means 13 has vertical ribs 18a or horizontal ribs 18b provided on the lower surface of the work W.
It is composed of a pair of sandwiching plates 19 capable of sandwiching (FIG. 2). Two of the positioning means 13 13A, 13B
Is for the short side for sandwiching the vertical rib 18a to position the work W in the short side direction, and the remaining one 13C is the horizontal rib 1
8b is sandwiched and the workpiece W is positioned in the longitudinal direction. In addition, the pair of sandwiching plates 19 constituting each positioning means 13 is provided with the holding device 1
The height is set so as not to interfere with the work W supported by 2.

Hereinafter, the heat treatment jig 1 configured as described above
The action of 0 will be described. When setting the work W on the heat treatment jig 10, the three positioning means 13 (13A,
13B, 13C) while positioning the work W in the short-side direction and the long-side direction, the work W is held by the three holding devices 1.
Place on top of 2. Then, the swing arm 16 in each holding device 12 swings following the shape of the lower surface of the work W. At this time, since the holding devices 12 are arranged at three locations on the base 11, each holding device 12 functions as a support point for supporting the work W at three points, and therefore, the swinging arms in each holding device 12 are supported. The load of the work W acts on 16 surely. As a result, the holding members 1 on both ends of the swing arm 16 are provided.
7 reliably contacts the lower surface of the work W, and as a result, the work W is in a state of being supported by the holding members 17 at six points.
Therefore, the work W does not sag by its own weight in the subsequent heat treatment (T6 treatment) due to the multipoint support. Further, even if the base 11 is thermally deformed due to repeated heat treatment, the swing arm 16 in each holding device 12 swings following the deformation, and thus each holding member 1 described above.
The state of 6-point support by 7 is maintained. That is, it is not necessary to manage the size (height adjustment) of the holding member 17 in advance, and it is not necessary to manage the size over time. Particularly in the first embodiment, since the intermediate point of the swing arm 16 in each holding device 12 is pivotally supported, the swing arm 16 is balanced left and right in a balance type. , The swing angle of each swing arm 10 when the work W is placed becomes small, and the holding member 17 is attached to the work W.
The impact caused by the contact with is reduced.

FIG. 3 shows a second embodiment of the present invention. The feature of the second embodiment is that one of the three balance-type holding devices 12 in the first embodiment is omitted and the holding device 1 is omitted.
Instead of 2A, a position-fixed holding member 20 is arranged on the base 11, and the holding member 20 and the remaining two holding devices 1 are arranged.
The point is that a relatively small work W ′ is supported at 5 points on 2B and 12C. In FIG. 3, the same parts as those shown in FIG. 1 are designated by the same reference numerals. Further, in FIG. 3, for convenience of description, the positioning means 13 in the first embodiment is omitted.

In the second embodiment, the base 1
Since the form in which the work W ′ is supported at three places on the first structure is the same as that in the first embodiment, the swing arms 16 in the two holding devices 12B and 12C are mounted depending on the placement of the work W ′. Oscillates, and the holding members 17 at both ends thereof surely contact the work W ′. That is, the work W ′ is supported at five points by the four holding members 17 in the two holding devices 12 </ b> B and 12 </ b> C and the holding member 20 that is fixed in position, thereby preventing the weight of the work W from hanging down. . Further, even if thermal deformation occurs in the base 11 due to repeated heat treatment, the swing arms 16 in the two holding devices 12B and 12C swing according to the deformation, so that the holding members 17 and 20 described above are used. The state of five-point support is maintained, and like the first embodiment, there is no need to perform dimensional control (height adjustment) of the holding member 17 in advance and over time. Which of the three balance-type holding devices 12 is to be replaced with the position-fixed holding member 20 is appropriately selected in consideration of the size of the work W ′, the weight balance, and the like. Further, the position-fixed holding member 20 may be provided so that its height can be adjusted like the holding member 3 (FIG. 8) in the conventional heat treatment jig 1.

FIG. 4 shows a third embodiment of the present invention. The feature of the third embodiment is that, out of the three balance-type holding devices 12 in the first embodiment, two holding devices 12 arranged in the longitudinal direction are provided.
For B and 12C, a balance-type sub-holding device 30 is provided in place of the holding member on one end side of the swing arm 16, and a relatively large work W ″ is attached to the holding device 12 and the sub-holding device 30. The sub-holding device 30 has substantially the same structure as the holding device 12 except that the holding device 12 is downsized, and the swing arm 16 of the holding device 12 is provided. Stand 3 at one end of the
1 and a swing arm (sub swing arm) 33 that is supported on the column 31 by a shaft 32 so as to be swingable in the vertical direction,
Holding members 34 arranged at both ends of the swing arm 33.
It consists of In this case, the holding device 12 has the shaft 15 so that the swinging arm 16 always maintains the horizontal state.
The support point by has been changed. In FIG. 4, the same parts as those shown in FIG. 1 are designated by the same reference numerals.
Further, in FIG. 4, the positioning means 13 in the first embodiment is omitted for convenience of description.

In the third embodiment, the base 1
Since the form in which the work W ″ is supported at three locations on the work piece 1 is the same as that in the first embodiment, the swinging of the three holding devices 12A, 12B, and 12C according to the placement of the work W ″. The arm 16 and the swing arm 33 in the sub-holding device 30 swing, and the holding members 17 and 34 at both ends of the swing work arm 33 work W ″.
Surely comes into contact with. That is, the work W ″ is supported at eight points by the holding member 17 in the three holding devices 12A, 12B and 12C and the holding member 33 in the sub holding device 30.
This prevents the weight of the work W from hanging down.
Further, even if the base 11 is thermally deformed by repeated heat treatments, the swing arms 16 and the sub swing arms 33 swing according to the deformation, so that the holding members 1 described above.
The state of 8-point support by 7, 34 is maintained, and the first,
As in the second embodiment, there is no need to perform dimensional control (height adjustment) of the holding members 17, 34 in advance and over time.

It should be noted that the present invention does not specify the number of supporting points, and, for example, one of the holding devices 12B and 12C in the second embodiment (FIG. 3) is further fixed in position. A four-point support structure is obtained by replacing the holding member, or a ten-point support structure is obtained by setting the sub-holding devices 30 at both ends of the swing arm 16 in the third embodiment (FIG. 4). can do. However, if the balance-type holding device 12 is installed at more than four locations, the holding member 17 that does not come into contact with the work W may be generated, so the number of locations should not exceed three. Further, the present invention is
It is not always necessary to balance the swinging arms 16 and 33 in each holding device 12 in a balance balance type. In this case, the swinging arms 16 and 33 are provided on the side surfaces of the swinging arms 16 and 33 so as to be arranged in the longitudinal direction thereof. The swinging fulcrum can be easily changed by selecting one of the plurality of through holes and passing the shaft 15 or by forming the swinging arms 16 and 33 to be telescopically expandable. it can.

[0016]

[Example] As the work W, as shown in FIG.
= 1150 mm, maximum width B = 350 mm, plate thickness t = 2 mm for die cast center pillars made of aluminum alloy, which is the first embodiment (FIG. 1).
The heat treatment (T6 treatment) was performed by supporting the heat treatment jig 10 having substantially the same structure as that of 6 points, and the dimension was measured before and after the heat treatment at the preset measurement points along the outer periphery of the work W. Then, the number of measurement work n is 30 (n =
30) as shown in FIG. 6, the variation ΔX and the variation (3) of the average value due to the heat treatment at each measurement point.
The variation ΔS of σ) was investigated. For comparison, FIG.
The conventional heat treatment jig 1 shown in Fig. 6 is used to support six workpieces W of the same kind, and the same heat treatment is performed. In the same manner as above, the average value variation ΔX and variation (3σ) variation ΔS are investigated. FIG. 7 shows the results of the above-mentioned investigation. From this, it can be seen that the result of heat treatment using the heat treatment jig 10 according to the present invention is higher than that of heat treatment using the conventional heat treatment jig 1. Both the change amount ΔX of the value and the change amount ΔS of the variation (3σ) are obviously small.

[0017]

As described above, according to the heat treatment jig of the present invention, since the holding member is arranged on the swinging arm which is vertically movable on the base, the number of points exceeds three points. Even if it is supported by, the dimensional control of the holding member becomes unnecessary, and it can be conveniently used for heat treatment of thin and large parts, which greatly contributes to the reduction of production cost.

[Brief description of drawings]

FIG. 1 is a perspective view schematically showing the structure and usage of a heat treatment jig with six-point support according to a first embodiment of the present invention.

FIG. 2 is a side view showing the structure and usage of the heat treatment jig shown in FIG.

FIG. 3 is a perspective view schematically showing the structure and usage of a five-point supporting heat treatment jig that is a second embodiment of the present invention.

FIG. 4 is a perspective view schematically showing the structure and usage of a heat treatment jig with 10-point support according to a third embodiment of the present invention.

FIG. 5 is a plan view schematically showing a work and a heat treatment jig used in an example of the present invention.

FIG. 6 is an explanatory diagram showing contents of data processing in the embodiment of the present invention.

FIG. 7 is a graph showing the examination results in the example of the present invention in comparison with the conventional example.

FIG. 8 is a perspective view schematically showing a conventional heat treatment jig and its usage mode.

[Explanation of symbols]

11 base 12 (12A, 12B, 12C) holding device 13 (13A, 13B, 13C) Positioning means 14 props 15 axes 16 swing arm 17 Holding member 20 Holding member (fixed) 30 Sub holding device 33 Swing arm (sub swing arm) 34 Holding member of sub holding device W, W ', W "work

Claims (3)

[Claims] 1. A heat treatment jig in which a plurality of holding members for supporting a work are arranged on a base, and a part or all of the holding members of a swing arm provided on the base so as to be vertically movable. A heat treatment jig characterized by being arranged at both ends. 2. A sub-oscillating arm is provided at least at one end of the oscillating arm so as to be able to oscillate in a vertical direction, and holding members are arranged at both ends of the sub-oscillating arm. The heat treatment jig described in. 3. An oscillating arm and a sub-oscillating arm are balance-balanced.
The heat treatment jig described in.