JPH0830207B2 - Induction induction hardening equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to an induction automatic quenching apparatus (hereinafter simply referred to as an induction hardening apparatus) for quenching long workpieces having the same diameter and different lengths in any order. .

<Prior Art> Conventionally, when there are works with the same diameter and different length, in order to quench these works with one induction hardening device, the works are divided into lengths in advance and the same length is used. Induction hardening is performed on all the workpieces, and then another length of workpiece is induction hardened.

<Problems to be Solved by the Invention> Therefore, it takes time and effort to classify the work.

The present invention was created in view of the above circumstances,
It is an object of the present invention to provide an induction hardening apparatus capable of automatically quenching a work having the same diameter and different length, without dividing the work and corresponding to the quenching specification of each work.

<Means for Solving the Problems> In order to solve the above problems, the device of the present invention is an induction hardening device for automatically quenching rod-shaped works having the same diameter and different lengths in random order, and the device is a work transfer mechanism. And a work holding / rotating mechanism, a quenching mechanism, and a control device. The work transfer mechanism includes a plurality of rows of fixed beams provided in parallel with the work axis, and the work beams so as not to interfere with the fixed beams. It has a plurality of rows of moving beams provided in parallel to the axis, and has a function of transferring a work on a fixed beam to a hardening fixed beam by moving the moving beam up and down and moving it back and forth in the transport direction, The quenching mechanism has a heating coil for quenching a work, a coil moving means for moving the heating coil in the axial direction of the work, and a heating coil position detecting means for detecting the position of the moved heating coil on the work. Oh The work holding / rotating mechanism includes a head center pin that holds one end of the work, a tail center pin that holds the other end, a moving distance detecting unit that detects a moving distance of the tail center pin to the work side, and a work rotating unit. The control device drives the work transfer mechanism, holds the work by the head center pin and the tail center pin, determines the work length based on the detection of the moving distance, and moves the heating coil to the quenching start point. The work quenching from the quenching start point to the quenching end point is controlled.

<Operation> When the work is conveyed to the fixed beam for quenching by the work conveyance mechanism and both ends of the work are held by the head center pin and the tail center pin, the movement distance of the tail center pin changes from the movement distance detection means. The length of the work that is detected and stored in the control device is known. Therefore, the quenching specification corresponding to the length of the work is called, and the heating coil moves to the tail center pin side according to this specification and temporarily stops at the quenching start point. Subsequently, the movement is started in the direction opposite to the heating coil (head center pin direction), and quenching is performed until the quenching end point is reached.

<Example> Hereinafter, an example of the present invention will be described with reference to the drawings.
1 to 4 are drawings for explaining one embodiment of the present invention. FIG. 1 is a front view, FIG. 2 is a plan view, and FIG. 3 is a side view of a work transfer mechanism. FIG. 4 is an explanatory view of the high-frequency heating coil. FIG. 4 (a) is a front view, FIG. 4 (b) is a side view, and FIG. 4 (c) is A-A in FIG. 4 (a).
FIG.

An induction hardening apparatus according to the present invention includes a work transfer mechanism,
A quenching mechanism that quenches the work, a work holding and rotating mechanism,
It is equipped with a control device.

First, the quenching mechanism will be described. The quenching mechanism includes a heating coil, a coil moving unit that moves the heating coil in the axial direction of the work, and a heating coil position detection unit that detects the position of the moved heating coil on the work.

In FIG. 1, reference numeral 902 is a top plate, which is supported by four columns 901 standing on a common base 900. Reference numeral 13 denotes a ball screw as a coil moving means, and the ball screw 13 is bridged between a pair of brackets 17a and 17b which are spaced from each other on the lower portion of the top plate 902. A rotary encoder 19 as a heating coil position detecting means for detecting the position of the heating coil on the ball screw 13 is attached to one end of the ball screw 13.

10 is a current transformer, this current transformer
10 is fixed on a flat plate 11 connected to a member 12 screwed to the ball screw 13 (however, the member 12 is not shown in FIG. 1 for the sake of simplicity). ing. And to support the weight of the transformer 10, a flat plate
A slider 15 is attached to the lower part of 11 and is slidably inserted into two guide rails 14 bridged between brackets 17a and 17b. (See Figure 2). 16 is a ball screw rotating motor, which is an L-shaped member 18
It is attached to the top plate 902 via. The forward and reverse rotations of the motor rotate the ball screw 13 to move the member 12, so that the heating coil 20 moves left and right along the axis of the work. The heating coil 20 is attached to the tip of the heating coil power supply conductor 21 led out from the secondary side of the current transformer 10.

Here, the heating coil in this embodiment will be described in detail with reference to FIG. In FIG. 4, reference numerals 22 and 22 are a pair of terminals. Lead port conductors 23 and 23 are connected to the lower portions of these terminals 22, and an annular conductor 26 is further connected. Numeral 25 is a connection hardware for supplying the cooling liquid. An insulating plate is provided between the terminals 22 and 22, between the lead port conductors 23 and 23, and between both ends of the annular conductor 26.
24 is interposed.

In order to circulate the cooling liquid (cooling liquid for cooling and quenching the annular conductor), the terminal 22 and the lead port conductor 23 have hollow portions (not shown), and the annular conductor 26 is shown in FIGS. 4 (a) and 4 (c). An annular hollow portion 27 as shown in FIG. 2 is provided, and one side surface of the annular conductor 26 is provided with a plurality of cooling liquid injection holes 28 that are electrically connected to the hollow portion 27. Although the annular conductor is shown as the coil main body as an example, the present invention is not limited to this, and a saddle type coil may be used as the coil main body.

Next, the work holding and rotating mechanism will be described. The work holding / rotating mechanism has a head center pin that holds one end of the work, a tail center pin that holds the other end, a moving distance detecting unit that detects a moving distance of the tail center pin to the work side, and a work rotating unit. ing.

Reference numeral 31 is a head center pin that holds one end of the work 100, and 32 is a head center that holds the head center pin 31. 34 is two parallel rods to which the slider 33 is slidably attached. Reference numeral 36 denotes a hydraulic cylinder, and the head center 32 moves back and forth in the axial direction of the work through a rod (not shown) that moves forward and backward by the hydraulic cylinder 36. The support member 35 is fixed on a base 903 provided on the common base 900 and bridges the rod 34. The head center pin 31 is inserted into the annular conductor 26 of the heating coil 20 so as not to come into contact with the annular conductor 26.

Next, the tail center pin side will be described. In FIG. 2, 43 is a hydraulic cylinder, 44 is a rod of the hydraulic cylinder 43, and a slider 42 is connected to the rod 44. Two parallel rods 41 are bridged between brackets 17a and 17b, and a slider 42 is slidably inserted in the rods 41. A tail center 45 is fixed below the slider 42, and a tail center pin 46 is fixed to the tip of the tail center 45. Reference numeral 48 is a moving distance detecting device as a moving distance detecting means for detecting a moving distance of the tail center pin 46 to the work side, and for example, a trade name “Vari Limit” is used. Reference numeral 47 is a cylinder as a work rotating means, and there is a rotary blade inside the cylinder, and the tail center pin 46 rotates by the rotation of the blade to rotate the work 100.

Next, the work transfer mechanism will be described. The work transfer mechanism in the embodiment has a fixed beam provided parallel to the work axis and a moving beam also provided parallel to the work axis so as not to interfere with the fixed beam. The work placed on the fixed beam is lifted by advancing and retreating to and is sequentially transferred to the front fixed beam. In the example,
The center fixed beam of the five rows is the quenching fixed beam, and the fixed beam on the right side of the drawing (Fig. 3) is for taking out the workpiece after quenching.

This mechanism will be described in more detail. First, in FIG. 1, 904 is a base on which a fixed beam is mounted. That is, 51, 52 and 53 are fixed beams provided parallel to the axis of the work 100, and V blocks 51a, 52a and 53a for mounting the work 100 on the fixed beams 51, 52 and 53. Is installed.

As shown in FIG. 3, the fixed beams 51, 52, and 53 are arranged at equal intervals in a plurality of rows (five rows in the drawing) in the direction orthogonal to the axis of the work 100, that is, in the conveyance direction of the work 100. Here, in the drawing, the central fixed beam 53 is a quenching fixed beam. That is, the fixed beam is directly below the center pin, and therefore the work 100 placed on the fixed beam 53 is in a position to be held by the center pin.

Returning to FIG. 1 again, 69, 69, 69 are three moving beams, and these moving beams 69, 69, 69 are provided on the flat plate 68 at positions where they do not interfere with the fixed beams 51, 52, 53. Has been. V blocks 69a, 69a, 69a for mounting the work 100 are also mounted on the moving beams 69, 69, 69, and arranged in four rows at equal intervals. Considering the transportation of the work 100, this distance is the same as the distance between the fixed beams.

The flat plate 68 is directly connected to the rod 66 of the hydraulic cylinder 65, and is moved up and down by the operation of the hydraulic cylinder 65. Further, the hydraulic cylinder 65 is attached to the slider 62, and the slider 62 is guided by guide rails 61, 61 bridged between the brackets 905, 905 to move in the carrying direction by the operation of the hydraulic cylinder 63 (advance and retreat of the rod 64). I am trying to do it. 67, 67 are the hydraulic cylinders
It is a guide rail for 65. Further, 55 is a proximity switch mounted on the V blocks of all the fixed beams, and this proximity switch 55 detects that the work 100 is placed on the fixed beam.

Reference numeral 80 denotes a control device which operates the work transfer mechanism, holds the work by a center pin, determines the length of the work 100, and controls the heating coil based on the quenching specifications corresponding to the work length stored in the control device. It has the functions of moving to the tail center pin side and controlling the hardening of the work.

 Next, the operation of this embodiment will be described.

It is assumed that the slider 62 is located on the leftmost side as shown in FIG. 3, and therefore the moving beam 69 is also located on the leftmost side as shown.

In FIG. 3, the leftmost V blocks 51a, 52a,
When the work 100 is placed on the 53a, the proximity switch 55 detects the placement of the work 100 and sends a signal to the control device 80.

The controller 80 receives the signal and operates the hydraulic cylinder 65 to lift the work 100. That is, the work 100 rides on the leftmost V block 69a.

Next, the hydraulic cylinder 63 operates to move the slider 62 to the right by one pitch, and the hydraulic cylinder 65 is moved to transfer the work 100 onto the second fixed beam from the left.

In the same manner, the work 100 is placed on all fixed beams.

When the proximity switch 55 provided therein detects that the work 100 is placed on the quenching fixed beam, the controller 80 operates the cylinder 36 to advance the head center 32, that is, the head center pin 31 by a predetermined distance. (To the left in FIG. 1), the cylinder 43 is operated to move the tail center 4
5, the tail center pin 46 forward (right in Fig. 1)
Then, the tail center pin 46 is inserted into the concave portion at the end of the work 100, and the work 100 is held by both center pins.

At this time, since the control device 80 stores the positions of the sliders 33 and 42 before the start of the movement, when the movement distance detecting device 48 knows the movement distance of the slider 42, the work 10
The length of 0 can be determined.

The control device 80 is the work 100 held by the center pin.
In order to form a hardened layer over a predetermined range, the heating coil moving motor 16 is started and the ball screw 13 is rotated,
The heating coil 20 is moved forward (moved to the left in FIG. 1) to the quenching start point of the workpiece 100 via the slider 15, and is temporarily stopped.

Next, while returning the heating coil 20 in the opposite direction, a high-frequency current of a predetermined magnitude is applied to the heating coil 20 and the cooling liquid is injected from the cooling liquid injection hole 28 of the heating coil 20. When the annular conductor 26 of the heating coil 20 reaches the quenching end point, the high-frequency current is cut off, and the high-frequency power source and the solenoid valve (not shown) of the quenching coolant system are controlled so as to finish the injection of the coolant.

<Effects of the Invention> As described above, the induction hardening apparatus of the present invention includes a work transfer mechanism, a hardening mechanism, a work holding and rotating mechanism,
A control device is provided, and the length of the work is determined by detecting the movement distance of the tail center pin as it moves to the work side. Further, it has means for moving the heating coil in the axial direction of the work and heating coil position detection means for detecting the position of the moved heating coil on the work. Further, the control device drives the work transfer mechanism as described above, moves the tail center pin to the work side, and detects the moving distance from the moving distance detecting means, thereby determining the length of the work, and the control device Move the heating coil to the tail center pin side based on the quenching specification corresponding to the length of the work stored in the inside,
The heating coil position detection means places the heating coil at the quenching start point of the workpiece, and while quenching the workpiece according to the stored quenching specifications, moves the heating coil to the head center pin side to the quenching end point. are doing.

Therefore, the induction hardening apparatus of the present invention, when quenching a plurality of long-sized workpieces having different lengths, even if the type of workpieces sequentially supplied to the induction hardening apparatus is at random, it is for each workpiece. Quenching can be performed automatically according to the quenching specifications of the work.

[Brief description of drawings]

1 to 4 are drawings for explaining one embodiment of the present invention. FIG. 1 is a front view, FIG. 2 is a plan view, and FIG. 3 is a side view of a work transfer mechanism. FIG. 4 is an explanatory view of the high-frequency heating coil. FIG. 4 (a) is a front view, FIG. 4 (b) is a side view, and FIG. 4 (c) is A-A in FIG. 4 (a).
FIG. 10 …… Current transformer 13 …… Ball screw 16 …… Ball screw rotating motor 19 …… Rotary encoder 20 …… Heating coil 31 …… Head center pin 46 …… Tail center pin 48 …… Movement distance detection means 100 …… Workpiece

Front page continuation (72) Inventor Yukisa Kuribayashi 4-16, Obara, Yao-shi, Osaka Prefecture Fuji Electronics Industry Co., Ltd. (56) Reference JP-A-52-133814 (JP, A) JP-A-57-126922 ( JP, A) JP 57-140826 (JP, A) JP 55-36248 (JP, B2)

Claims (1)

[Claims] 1. An induction hardening apparatus for automatically quenching rod-shaped works having the same diameter and different lengths in random order, said apparatus comprising a work transfer mechanism, a work holding and rotating mechanism, a hardening mechanism, and a controller. The work transfer mechanism has a plurality of rows of fixed beams provided parallel to the work axis and a plurality of rows of movable beams provided parallel to the work axis so as not to interfere with the fixed beams. , Has a function of transferring the work on the fixed beam to the fixed beam for quenching by moving the moving beam up and down and moving back and forth in the transport direction, and the quenching mechanism includes a heating coil for quenching the work and a heating coil. Coil moving means for moving in the axial direction of the work,
The heating coil position detecting means for detecting the position of the moved heating coil on the work, the work holding and rotating mechanism, a head center pin holding one end of the work, a tail center pin holding the other end, A moving distance detecting means for detecting a moving distance of the tail center pin to the work side and a work rotating means are provided, and the control device drives the work conveying mechanism, holds the work by the head center pin and the tail center pin, It is characterized by controlling the determination of the length of the work based on the detection of the movement distance, the movement of the heating coil to the quenching start point, and the work quenching from the quenching start point to the quenching end point. Induction hardening equipment.