JP2003286519A - Induction hardening apparatus for cylinder block, and hardening method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an induction hardening apparatus for precisely and efficiently hardening a cylinder block. <P>SOLUTION: This induction hardening apparatus comprises a fixed work table 11 for mounting the cylinder block, a mobile position-measuring means 31 capable of measuring simultaneously several positions of the cylinder, and one or more mobile heating coils 23. The hardening method comprises measuring the position of the work cylinder with the position measuring means 31, placing the heating coil 23 at the spot to be quenched of the predetermined cylinder on the basis of measured coordinate values, and heating and quenching the inner surface of the cylinder. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a quenching part for forming a partially divided quenching layer on the inner surface of a cylinder used under a high load such as a cylinder block of a diesel engine. The present invention relates to an induction heating and quenching apparatus for a cylinder block, which heats and quenches by precisely controlling the relative position of the induction heating coil.

[0002]

2. Description of the Related Art The inner surface of a high-load cylinder such as a diesel engine is subjected to inner surface quenching to form a partial quench-hardened portion. For quenching the inner surface of such a cylinder block, the applicant has previously described in Japanese Patent Laid-Open No. 7-1
The induction heating coil and the induction hardening method described in JP 61461 and JP-A 7-272845 have been proposed.

In quenching by such induction heating, when the center of the cylinder and the induction heating coil are eccentric and the gap distance between the inner surface of the cylinder and the outer surface of the induction heating coil is different, a temperature difference is generated on the heating surface and the inner circumference of the cylinder is increased. In addition to unevenness in the shape of the quenching pattern, the depth of the quenching layer also becomes shallow. In order to eliminate this unevenness, it is necessary to set the position of the induction heating coil so that the center of the cylinder and the center of the induction heating coil coincide with each other in several tens of microns, and then heat quenching. However, in quenching a cylinder block having a plurality of cylinders, this setting requires a great deal of time, and mass production quenching is difficult.

In order to solve this, the present inventors have previously disclosed a precision induction heating heat treatment apparatus for cylinder blocks (Japanese Patent Laid-Open No. 8-225846). In this heat treatment apparatus, a heating coil is fixed and a work table on which a cylinder block is loaded is moved to sequentially heat and quench the cylinders of the cylinder block.

[0005]

However, in the quenching of the cylinder block described above, since the block is normally heated by quenching it in a cooling liquid tank filled with a cooling liquid, the above heat treatment apparatus requires a work table. There is a problem that the liquid surface of the cooling liquid tank in which the block is sunk when moving is wavy. To quench the next cylinder for this,
There is a problem in that it takes time after the wave on the liquid surface has settled down and the production capacity decreases.

In addition, the above quenching apparatus has a problem that it takes time to measure and quench because the quenching is performed while measuring the deviation of the cylinder position one by one.

Therefore, according to the present invention, the cooling liquid tank of the cylinder block is fixed, the measuring means and the heating coil are moved to suppress the ripple of the cooling liquid in the liquid tank, and the deviation of a plurality of cylinder positions is once. It is an object of the present invention to provide an induction heating and quenching apparatus and method for a cylinder block, which efficiently heats and quenches the cylinder block by measuring and quenching with.

[0008]

In order to achieve the above object, an induction heating and quenching apparatus for a cylinder block for quenching the inner surface of a cylinder according to the present invention is a fixed work for mounting a quenching cylinder block at a reference position. A table, a moving position measuring means for measuring the cylinder position of a block placed on the work table, a moving heating coil for inductively heating the inner surface of the cylinder, and a moving position measuring means based on the coordinate value measured by the position measuring means. A heating coil control means for heating the heating coil by locating the heating coil at a quenching point of a predetermined cylinder is provided.

When induction hardening / quenching of the cylinder is carried out in the cooling liquid of the cooling tank when induction heating / quenching of the cylinder block is carried out, rapid hardening and rapid cooling can be carried out, so that reliable hardening can be carried out. The above-mentioned JP-A-8-22
The quenching apparatus disclosed in Japanese Patent No. 5846 is provided with a cooling bath for this purpose, and the cooling bath is moved to sequentially quench a plurality of cylinders. However, when the cooling tank is moved as described above, there is a problem that rapid continuous quenching cannot be performed because the cooling liquid is wavy.

Therefore, the present invention is characterized by moving the heating coil and fixing the cooling tank. That is, the induction heating and quenching apparatus for a cylinder block of the present invention fixes a work table on which a cooling tank in which the cylinder block is submerged is mounted, moves the position measuring means for measuring the cylinder position, and the induction heating coil to perform heating. Because it is quenched, the cooling tank does not move and there is no ripple of the cooling liquid. Therefore, rapid quenching is possible and the production capacity is improved.

Further, the position measuring means of the induction heating and quenching apparatus for a cylinder block of the present invention is equipped with a measuring head capable of simultaneously measuring two or more cylinder positions, and the heating is performed based on each cylinder position coordinate measured by the measuring head. The present invention is characterized by comprising heating coil control means for locating the coil at a quenching point of a predetermined cylinder.

In this way, the position measuring means measures the deviations of a plurality of cylinder positions at the same time, and the heating coil is positioned at the corresponding cylinder position according to the measured values, whereby the position of each cylinder can be measured. Compared with the conventional device in which the heating coil is located, the measurement time is significantly shortened and the production efficiency can be improved. For example, if the measuring heads are provided for the number of cylinders and the positional deviations of all the cylinders are measured at the same time, the measuring time and the heating coil moving time are several minutes longer than the conventional method of measuring the cylinders one by one and moving the heating coils. It can be shortened to 1.

Further, the induction heating and quenching apparatus for a cylinder block according to the present invention defines a plurality of heating coils to be inserted into a plurality of cylinders at the same time and a predetermined heating coil based on each cylinder position coordinate measured by the position measuring means. A heating coil control unit is provided which is located at a quenching point of a cylinder and switches and inputs electric power to a heating coil corresponding to the cylinder so that the quenching point is heated individually or simultaneously. is there.

That is, for example, two heating coils are provided and inserted into two cylinders, each heating coil is adjusted to a predetermined cylinder position based on the measurement value of the position measuring means, and the corresponding heating coil is switched. The two cylinders can be rapidly heated and quenched by inputting electric power. In this way, the time can be significantly shortened as compared with the case where a heating coil is inserted and extracted for each cylinder and heating and quenching is performed. In addition, when machining two cylinders by boring at the same time and there is little machining error,
When the deviation values of the cylinder positions are the same, the two cylinders can be simultaneously input to simultaneously heat and quench the two cylinders.

Further, in the induction heating and quenching apparatus for a cylinder block of the present invention, a fixed work table for mounting the quenching cylinder block at a reference position and an induction heating coil in the X direction parallel to the cylinder row of the block. X to reciprocate
An h table, a Yh table that reciprocates in the Y direction orthogonal to the X direction, a heating table that includes a Zh table that reciprocates in the Z direction of the cylinder axis, and coordinate storage means that measures and stores the position coordinates of the heating table. And a heating table control means for driving the heating table to position the induction heating coil at a quenching point of a predetermined cylinder, in order to easily achieve the above object.

Further, a fixed work table for mounting the quenching cylinder block at a reference position, and an Xm table for reciprocating position measuring means for measuring the position of the cylinder in the X direction parallel to the cylinder row of the block. A Ym table that reciprocates in the Y direction orthogonal to the X direction, a measurement table that includes a Zm table that reciprocates in the Z direction of the cylinder axis, and coordinate storage means that measures and stores the position coordinates of the measurement table, In order to easily achieve the above object, it is preferable to provide a measurement table control means for driving the measurement table to position the position measurement means at a quenching point of a predetermined cylinder.

That is, by driving the heating table and the measuring table by separate tables, quick measurement and quenching and heating can be performed, so that the production capacity can be increased. Further, the heating table and the measuring table can be concentrated on one side of the fixed work table, but the heating table and the measuring table can be arranged on both sides of the fixed work table with the fixed work table interposed therebetween. Desirable for easy maintenance.

Further, since the reference member for verifying the set position of the position measuring means and the heating coil is provided on the fixed work table, the set position of the position measuring means and the heating coil is deviated at the start of the work or during the work. It is desirable to detect and deal with such problems early.

The reference member is a member in which a plurality of reference rings having an inner diameter substantially the same as that of the quenching cylinder are arranged in a line at intervals of the quenching cylinder, and the position measuring means measures the deviation of the inner diameter of the reference ring. It is desirable to use an inner diameter measuring device for the purpose of easily confirming the above position.

The induction heating coil is held on the Zh table so as to be rotatable in the θ direction, and the control means is provided with a control section for driving and controlling the rotation of the induction heating coil, so that a quenching layer having a mottled pattern is formed on the inner surface of the cylinder. Is desirable for forming.

Further, in the induction heating and quenching method for a cylinder block of the present invention, the master cylinder block is placed at the reference position of the fixed work table, and the position measuring means is moved to measure the cylinder position of the master block. , The induction heating coil is moved so that the center is aligned with the cylinder position to a set position, the quenching cylinder block is replaced with the master block and placed on the work table, and the quenching is performed by the position measuring means. A deviation from the set position of the cylinder is measured, the measured deviation value is corrected, the induction heating coil is positioned at the center of the cylinder, and induction heating quenching is performed.

In this way, the master block having the same shape as the hardened cylinder block is used to set the reference value, and only the cylinder position deviation of the hardened cylinder block placed on the work table is corrected, and the heating coil is heated. By locating and quenching, it is possible to set the position and quench very easily. At this time, since the quenching cylinder block is fixed and the position measuring means and the heating coil are moved, rapid quenching work can be performed.

The specific contents of this operation will be described in detail in the embodiment to be described later, but since the above-mentioned operations are automatically performed by the control means, the position of the quenching cylinder can be set easily and quickly. Accurate induction heating and quenching are possible.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be specifically described below with reference to an embodiment shown in the drawings. 1 is a front view of an induction heating and quenching apparatus for a cylinder block according to an embodiment of the present invention, FIG. 2 is a top view thereof, FIG. 3 is a view taken along line AA of FIG. 1, and FIG. 4 is a block diagram of control means. In the present embodiment, a case of the illustrated four cylinder cylinder block will be described. The same applies to the case of 6 cylinders and 8 cylinders.

1 to 3, a heating unit 5 and a measuring unit 6 are provided on both sides of a common base frame 10 with a work table 11 interposed therebetween. A quenching cylinder block (hereinafter referred to as a work block) is placed on the work table 11 in the center with the cylinder row in the X direction in the drawing. A cooling tank 41 for immersing the work block W in a cooling liquid is provided on the upper surface of the work table 11, the cooling liquid is supplied from a water injection pipe 43, and the overflowed liquid is discharged from an overflow pipe (not shown). The water is drained from the drain pipe 44 to the coolant tank 45. As a result, the work block W is induction-heated by energizing the heating coil 23 inserted in the cylinder while being immersed in the cooling liquid, and when the current in the induction heating coil is cut off, the work block W is immersed in the cooling liquid. It is cooled and the inner surface of the cylinder is quenched.

The work block W is provided with a reference hole,
The work block is placed at the reference position on the work table 11 by inserting a reference knock pin (not shown) provided on the bottom surface of the cooling tank 48 into the work block 11. Although not shown in the present embodiment, the work block W may be quench-cooled while being sprayed with the coolant on the quenching heating surface of the cylinder with or without being immersed in the coolant.

A reference ring 36, which is a reference member, is fixed on the work table 11 in line with the cooling tank 41 and on the same line as the cylinder row of the work block W. The reference ring 36 has four rings of the same number and the same inner diameter as the cylinder of the work block arranged on the cylinder row line at the same intervals as the cylinder intervals.

Next, the heating unit 5 will be described. The heating X table (Xh table) 13 provided on the base frame 10 on the right side of the work table 11 in FIG.
A pulse motor 14 and a ball screw 15 reciprocally drive the rail 12 in the X direction in parallel with the cylinder row. Heating X
On a rail 16 provided on the table 13, a heating Y table (Yh table) 18 is driven by a driving device 17 such as a pulse motor 17 in a Y direction perpendicular to the X axis (orthogonal to the cylinder row).
Is driven back and forth.

A rail 19 is provided on a vertical frame 26 provided on the heating Y table 18, and a heating Z table (Zh table) 21 is provided on the rail 19 by a driving device 20 in the cylinder axis direction of the work block W (that is, the base frame). It is driven to reciprocate vertically. The heating Z table 21 has a power supply box 22 for storing a high frequency transformer
The induction heating coil 23 is supported on the power supply box 22 by the support shaft 24. As a result, the induction heating coil 23 moves in the cylinder axis direction (that is, perpendicular to the base frame) and is rotationally driven in the θ direction by the drive device 25. Although two induction heating coils 23 are shown in the figure, a case where there is one induction heating coil 23 will be described for simplification. Driving devices such as these pulse motors and driving means described later are driven by pulse signals sent from the control means 100.

Details of the induction heating coil 23 are omitted,
A coil shown in Japanese Patent Laid-Open No. 7-161461 is used to form a spot-patterned partially divided quenching layer on the inner surface of a cylinder.

Next, the measuring unit 6 will be described. The measurement unit 6 also has an XYZ configuration similar to that of the heating unit 5.
It consists of a table. That is, a measurement X table (Xm table) 53 provided on the base frame 10 on the side opposite to the heating unit 5 with the work table 11 sandwiched therebetween is mounted on the rail 52 by the pulse motor 51 and the ball screw 50 in parallel with the cylinder row in the X direction. Is driven back and forth. A measurement Y table (Ym table) 55 is mounted on a rail 54 provided on the measurement X table 53, and a drive device 56 such as a pulse motor is provided.
Are reciprocally driven in the Y direction (perpendicular to the cylinder row) at right angles to the X axis.

A rail 58 is provided on a vertical frame 57 provided on the measurement Y table 55, and a measurement Z table (Zm table) 59 is provided on the rail 58 by a driving device 60 in the cylinder axis direction of the work block W (that is, the base frame). It is driven to reciprocate vertically. These driving means are also driven by the pulse signal sent from the control means 100 like the heating unit.

A measuring box 33 is fixed to the Z table 59, and four inner diameter measuring devices 31 having an inner diameter measuring head 32 as a position measuring means are attached to the measuring box 33 in the same number as the number of cylinders. A stylus type electronic probe was used as the inner diameter measuring device 31. With such an inner diameter measuring device, the deviation in the X-Y directions can be easily measured, and as a result,
Cylinder positions at different points can be measured simultaneously.

The control means 100 shown in FIG.
1 and a storage unit 102, and controls the heating unit 5 and the measuring unit 6. The storage unit 102 stores the table coordinates of the heating Xh-Yh-Zh table position, the measured values of the table coordinates of the measured Xm-Ym-Zm table position, and the operating position in each stage of quenching of the cylinder block.

Based on the coordinate values stored in the storage unit 102, the control unit 101 determines the
Driving devices 14, 17, 20 for moving and rotating the heating Xh-Yh-Zh tables 13, 18, 21 and the induction heating coil 23 in a predetermined manner, and for moving the measurement Xm-Ym-Zm table and the inner diameter measuring device 31. , 25 and 51, 56, 6
It is designed to send a signal to 0 or the like.

Hereinafter, the operation of quenching a cylinder block having four cylinders with a cylinder interval of A by the induction heating and quenching apparatus having the above-mentioned configuration will be described.

The operation of the induction heating and quenching apparatus of the present invention is as follows.
It is divided into a preparatory stage for setting the position coordinates of each cylinder bore of the master block M and a position coordinate of the induction heating coil, and a quenching stage of induction heating and quenching for measuring the position coordinates of each cylinder bore of the work block W.

FIG. 5 is a flow chart of the process of setting the coordinate of the cylinder position of the master block M and the position coordinate of the induction heating coil in the preparation stage, and FIG. 6 is the measurement of the position coordinate of each cylinder bore of the work block W and the induction heating quenching. It is a flowchart of.

[Preparation Stage] The operation of the preparation stage will be described with reference to FIG. It is assumed that the four inner diameter measuring heads 32 are already mounted on the measuring box 33 in parallel with the cylinder row with the interval A. The measurement head 32 is attached by inserting the measurement head 32 into the four rings at the position of the reference ring 36 and measuring the center deviation.
Since the two can be correctly attached by fixing them, the details of the attaching method are omitted.

First, a master block M having the same shape as the work block W is placed at a reference position on a fixed work table with the cylinder line parallel to the X axis (STEP 1).

The measurement Xm-Ym-Zm table is moved (STEP 2), and the four measuring heads 32 are inserted into the four cylinders of the master block so as to substantially coincide with the centers of the cylinders, and the Xm-Ym table coordinates at that position are set. The value is (Xm
0, Ym0) (STEP 3). Then, the deflection of all the first, second, third, and fourth cylinders of the measuring head 32 is set to 0 (STEP 4). As a result, the center of each cylinder is set to 0 point.

Next, the measurement Xm-Ym-Zm table is moved to the reference member position (STEP 5), the four inner diameter measuring heads 32 are inserted into the four reference rings 36, and the measurement table Xm- at that position is set. Set the coordinate value of Ym to (Xms, Ym
s) (STEP 6). Then, the shake amounts in the XY directions of the centers of the first, second ... Nth reference rings measured by the measuring head 32 are (ms1a, ms1b), (ms2a, ms2).
b), ... (msna, msnb) (STEP
7). By storing this coordinate value and the shake amount,
It is possible to check whether or not the measuring head is displaced at the beginning or the middle of the work.

When the setting of the measuring head is completed, measurement Xm-
Move the Ym-Zm table to the standby position (STEP
8).

Subsequently, the position of the heating coil is set. Move the heating Xh-Yh-Zh table (STEP 9),
The heating coil 23 is inserted into the first cylinder of the master cylinder so that the centers thereof coincide with each other, that is, the deflection amount of the measuring head 32 is set to 0, and the coordinate values of the coincident point table Xh-Yh are set to (Xh1, Yh1) ( STEP10).

The heating Xm-Ym-Zm table is moved (STEP 11), the heating coil 23 is sequentially inserted into the second to nth cylinders of the master cylinder, and the coordinate values of the heating Xh-Yh table whose centers coincide with each other are set as follows. Each (Xh
2, Yh2) ... (Xhn, Yhn) (STEP1
2).

Next, the heating Xh-Yh table is used as the reference member 3.
1 (STEP 13), the heating coil 23 is inserted into the first ring of the reference ring 36, and the centers thereof are matched, that is, the deflection amount of the heating coil 23 is set to 0, and the heating table Xh- at the matching point. Set the coordinate value of Yh to (Xhs, Y
hs) (STEP 14). By storing these coordinate values, it is possible to check whether or not the heating coil is displaced at the start or midway of the work.

When the setting of the heating coil is completed, the heating Xh
-Move the Yh table to the standby position (STEP 15),
Loading and unloading master blocks from the work table (STE
P16).

The measurement table coordinates are Xm0 and Ym.
When the deflection amount of the measuring head is 0 and the heating head is 0, the heating table has coordinate values (Xh1, Yh1), (Xh2, Yh2), ...
hn, Yhn) so that the heating coil is positioned at the quenching position of a predetermined cylinder by being sequentially driven to move.
00, the storage unit 102 and the control unit 101 are set. (ST
EP17). The preparatory step is completed by performing the above operation.

[Quenching Stage] Next, the quenching stage will be described with reference to FIG. First, the measurement and heating table is at the standby position (STEP 18). Place the hardened block (hereinafter referred to as the work block) at the reference position on the fixed work table with the cylinder line parallel to the X axis (STE).
P19). At this time, the positions of the cylinder bores of the work block W are located at substantially the same positions as the cylinder bores of the master block M described above, but the positions are slightly displaced due to the mounting accuracy and the accuracy of the individual work block machining. Induction heating and quenching with high accuracy cannot be performed using the position coordinates of each cylinder of the master block.
Therefore, it is necessary to correct the deviation between the positions of the master block and the work block. The operation will be described below.

When the start switch 105 is turned on (STEP 20), measurement X is performed by the signal of the control means 100.
The m-Ym table moves from the standby position to the coordinates Xm0 and Ym0 (STEP 21), and the measuring head 32 is inserted into the four cylinders of the work cylinder (STEP 22), 4
The shake of each cylinder is simultaneously measured by the individual measuring heads 321 to 324. The measured shake amounts at the centers of the first, second, third, and fourth cylinders are (ma1, mb1), (ma2, mb2), ... (Ma) in the X and Y directions, respectively.
(n, mbn) (STEP 23). When the measurement of the shake of each cylinder is completed, the measurement Xm-Ym table moves to the standby position (STEP 24).

As described above, in the quenching apparatus of the present invention, the positions of a plurality of cylinders are measured at the same time, so that the measuring time is greatly shortened and the work efficiency is improved as compared with the conventional case of measuring each cylinder. .

When the work cylinder position measurement is completed, the heating Xh-Yh table displays the coordinate values (Xh1 + ma1, Yh).
1 + mb1) (STEP 25). The Zh table moves at this position and the heating coil 23 is inserted into the first work cylinder (STEP 26). This places the heating coil in the center of the cylinder. Here, the heating coil 23 is energized to heat and quench the first cylinder for quenching (STEP 27).

In this quench cooling, since the work block W is induction-heated in the cooling liquid in the cooling tank 41,
When the power is turned off after the electric heating, the heating section is immediately cooled by the cooling liquid. Thereby, rapid cooling after induction heating can be performed, and a hardened layer having high hardness can be efficiently obtained.

When the quenching of the first work cylinder is completed (STEP 28), the heating coil 23 is extracted from the first work cylinder (STEP 29).

Similarly, the second to n-th work cylinders are sequentially quenched (STEPs 30 to 34). When all the cylinders have been quenched, the heating Xh-Yh table moves to the standby position (STEP 35). These actions are
All are automatically performed by the pulse signal control of the control unit 101. When the quenching is completed, the start switch 105 is turned off (STEP 36), the work block is unloaded from the work table (STEP 37), and the quenching is completed.

In the above process, when the start switch 105 is turned on in STEP 20, the water injection pipe 4
The cooling liquid is injected into the cooling tank 41 from 1 and the cooling liquid is discharged from the drainage pipe 44 when the quenching is completed in STEP 33, but the description thereof is omitted.

During quenching of each of the above-mentioned cylinders, the work cooling bath is fixed, the inner diameter measuring device and the heating coil move, and the quenching operation is performed to stabilize the liquid level in the cooling bath. The work efficiency can be improved.

In the above-mentioned quenching of the inner surface of the cylinder, when a plurality of rows of partial quenching layers having a mottled pattern are formed on the inner surface of the cylinder, heating is performed by the driving device 25 using a heating coil as disclosed in JP-A-7-161461. The coil is at a predetermined angle
By rotating and quenching, the prescribed uneven quenching layer can be obtained.

In the above embodiment, the case where one heating coil is provided has been described, but the case where two heating coils are provided as shown in FIGS. 2 and 3 will be described. Here, the heating coil is arranged to be inserted into the first and third cylinders or the second and fourth cylinders.

The two heating coils 23, 23 'are inserted into the first and third cylinders, and first, the heating coil 23 is moved according to the measurement value of the first cylinder of the measuring head 32, and the first
It is placed in the center of the cylinder and electric power is input to the heating coil 23 to heat and quench the first cylinder.

Next, the heating coil 23 'is moved in correspondence with the measured value of the third cylinder of the measuring head 32, placed at the center of the third cylinder, and the power is switched to the heating coil 23' to input the third cylinder. Heat and quench. At this time, the two coils are quenched with the heating coil inserted without being extracted from the cylinders.

Similarly, the second and fourth cylinders are quenched. By doing so, since quenching of two cylinders is performed without repeating insertion / extraction of the heating coil only by switching the power, the quenching time can be further shortened.

Further, when the machining accuracy of the cylinder block and the mounting accuracy are high and the deflection amounts of the two cylinders of the measuring head 32 are equal, the two coils are simultaneously energized to quench the two cylinders simultaneously. You can also do it.

As described above, the induction heating and quenching apparatus of the present invention can be mass-produced and quenched because the operation of the quenching step is automatically controlled by the control unit 101 and the storage unit 102 of the control means 100. Is. Further, since the centers of the cylinder bores of the cylinder block and the induction heating coil are accurately set, there is little difference in circumferential spacing, and unevenness may occur even in the case of a partial hardening layer having a mottled pattern formed on the inner surface of the cylinder. Absent.

Further, since the cooling bath of the work table is fixed, continuous quenching can be efficiently performed, and the position of all cylinders can be measured once by providing a plurality of position measuring means. It will be more efficient. Further, the production efficiency is further improved by heating and quenching by providing a plurality of heating coils and switching the input of electric power.

[0066]

As described above, according to the induction heating and quenching apparatus for a cylinder block of the present invention, it is possible to perform quenching with high accuracy and efficiency, and it is possible to mass-produce the quenching work of the cylinder block and to reduce the work cost. Can be reduced.

[Brief description of drawings]

FIG. 1 is a front view of an induction heating and quenching apparatus for a cylinder block according to an embodiment of the present invention.

FIG. 2 is a top view of FIG.

FIG. 3 is an AA view of FIG.

FIG. 4 is a block diagram of a control unit according to the embodiment of the present invention.

FIG. 5 is a flowchart showing the steps of the operation of the preparation stage of the induction heating and quenching apparatus according to the embodiment of the present invention.

FIG. 6 is a flow chart showing the steps of an induction heating and quenching apparatus according to an embodiment of the present invention during a quenching stage.

[Explanation of symbols]

5 heating unit, 6 measuring unit, 10 base frame, 11 work table, 12 rails, 13
Heating X table, 14 pulse motor, 15 ball screw, 16 rail, 17 drive device, 18 heating Y table, 19 rail, 20 drive device, 21 heating Z table, 22 power supply box, 23 induction heating coil,
24 support shaft, 25 rotation drive device, 26 vertical frame, 30 rail, 31 inner diameter measuring device (position measuring means),
32 measuring head, 33 measuring box, 36 reference ring (reference member), 41 cooling tank, 43 water injection pipe,
44 Drain pipe 45 Coolant tank, 51 Pulse motor, 52 Rail, 53 Measuring X table, 54
Rail, 55 measuring Y table, 56 driving device, 57
Vertical frame, 58 rails, 59 measuring Z table,
60 drive device, 100 control means, 101 control unit,
102 storage unit, 104 operation switch, 105 start switch, M master block, W work block

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 3K059 AA09 AB04 AB09 AC37 AC62                       AD03 AD04 AD35 AD40 BD17                       CD75                 4K042 AA25 BA13 DA01 DB01 DD03                       DF01 EA01

Claims (10)

[Claims] 1. An induction heating and quenching apparatus for a cylinder block for quenching the inner surface of a cylinder, comprising: a fixed work table for placing the quenching cylinder block at a reference position;
The moving position measuring means for measuring the cylinder position of the block placed on the work table, the moving heating coil for induction heating the inner surface of the cylinder, and the heating coil based on the coordinate values measured by the position measuring means. An induction heating and quenching apparatus for a cylinder block, comprising: heating coil control means for heating at a quenching point of a predetermined cylinder. 2. The position measuring means comprises a measuring head capable of simultaneously measuring two or more cylinder positions, and heating for positioning the heating coil at a quenching point of a predetermined cylinder based on respective cylinder position coordinates measured by the measuring head. A coil control means is provided, The coil control means is provided.
Induction heating and quenching apparatus for cylinder block according to. 3. A plurality of heating coils to be inserted into a plurality of cylinders at the same time, and the heating coil is positioned at a quenching point of a predetermined cylinder based on the cylinder position coordinates measured by the position measuring means. 2. An induction heating and quenching apparatus for a cylinder block according to claim 1, further comprising heating coil control means for switching and inputting electric power to a heating coil corresponding to the cylinder so as to be individually or simultaneously heated. . 4. A fixed work table for mounting a quenching cylinder block at a reference position, an Xh table for reciprocating an induction heating coil in the X direction parallel to the cylinder row of the block, and an Xh table orthogonal to the X direction. A Yh table that reciprocates in the Y direction, a heating table that includes a Zh table that reciprocates in the Z direction of the cylinder axis, and coordinate storage means that measures and stores the position coordinates of the heating table.
The induction heating and quenching apparatus for a cylinder block according to claim 1, further comprising: heating table control means that drives the heating table to position the induction heating coil at a quenching point of a predetermined cylinder. 5. A fixed work table for mounting a quench-hardened cylinder block at a reference position, and an Xm table for reciprocally moving position measuring means for measuring the position of the cylinder in the X direction parallel to the cylinder row of the block. A Ym table that reciprocates in the Y direction orthogonal to the X direction, a measurement table that includes a Zm table that reciprocates in the Z direction of the cylinder axis, and coordinate storage means that measures and stores the position coordinates of the measurement table, The induction heating and quenching apparatus for a cylinder block according to claim 4, further comprising: a measurement table control unit that drives a measurement table to position the position measuring unit at a quenching point of a predetermined cylinder. 6. The induction heating and quenching device for a cylinder block according to claim 5, wherein the heating table and the measuring table are arranged on both sides of the fixed work table. 7. The induction heating and hardening apparatus for a cylinder block according to claim 5, wherein a reference member for verifying the set positions of the position measuring means and the heating coil is provided on the fixed work table. 8. The reference member comprises a member in which a plurality of reference rings having substantially the same inner diameter as the quenching cylinder are arranged in a row at intervals of the quenching cylinder, and the position measuring means has a deviation of the inner diameter of the reference ring. The induction heating and quenching apparatus for a cylinder block according to claim 7, characterized in that the apparatus comprises an inner diameter measuring device for measuring. 9. The induction heating coil is held on the Zh table so as to be rotatable in the θ direction, and the control means includes a control unit for driving and controlling the rotation of the induction heating coil. An induction heating and quenching device for a cylinder block according to item 3. 10. A master cylinder block is placed at a reference position of a fixed work table, the position measuring means is moved to measure the cylinder position of the master block, and the induction heating coil is moved to center the cylinder position. To the set position, the hardened cylinder block is replaced with the master block and placed on the work table, and the position measuring means measures the deviation of the hardened cylinder from the set position. An induction heating and quenching method for a cylinder block, characterized by correcting the measured deviation value and positioning an induction heating coil at the center of the cylinder for induction heating and quenching.