JPS5835578B2 - Rotary hardening equipment for annular bodies - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a quenching apparatus that rotates an annular body heated to a quenching temperature and rapidly cools the annular body while applying pressure to the outer surface of the annular body.

Conventionally, quenching of an annular body has been carried out by heating the annular body to a quenching temperature in a heating furnace, and then directly quenching the annular body with a quenching agent such as quenching oil.

In this quenching method, it was unavoidable that strain would occur during the heating and cooling process of the annular body, and that deformation would remain on the outer surface of the annular body after quenching.

Therefore, for annular bodies to be ground after quenching, extra grinding allowance is required to account for the amount of deformation caused by quenching, so the time required to process this extra grinding allowance is In addition, there were disadvantages such as the occurrence of defective products due to insufficient grinding allowance due to the occurrence of large abnormal deformation.

In addition, in the conventional method of hardening an annular body, in order to prevent deformation caused by hardening, appropriate jigs and equipment are used during the cooling process to harden any of the side, outer, and inner surfaces of the annular body to be hardened. A method of press hardening while pressurizing and straightening the surface is well known and has been put into practical use.

This press hardening method is effective when the annular body to be hardened is relatively small and mass produced.

However, in this case, the hardening performance of the annular body is affected by the design shape and processing accuracy of the jig used, and depending on the jig used, there may be a fatal decline in hardening performance, which poses a problem. there were.

In addition, when press hardening a large annular body, the jigs and equipment used become larger, which increases manufacturing costs, and in the case of high-mix, low-volume production, it takes a long time to replace and adjust jigs. However, this invention has disadvantages in operability, such as being time-consuming.In this invention, the annular body heated to the quenching temperature is placed on a mounting table, and the outer surface of the annular body is held between two drive rolls and one pressure roll. In this way, the annular body is rapidly cooled while being rotated and pressurized to prevent and correct deformation of the annular body, resulting in low processing costs, good operability, stable hardening quality, and continuous automatic hardening. The purpose of the present invention is to obtain a rotary hardening device for annular bodies.

Embodiments of the present invention will be described below based on the drawings.

1 and 2 are explanatory diagrams showing the entire apparatus of the present invention, which includes a quenching tank 1, a main body part 2, a loading part 3, and FIG.
and a main body movable mechanism 4.

There is a main body part 2 above the quenching tank 1, a loading part 3 in front of the side surface of the quenching tank 1, and a discharge chute 5 in the rear.

Two driving rolls 6.7 are located on the left side of the main body 2, and a pressure roll 9 that is movable laterally together with a slider 8 is located in the center.
To the right of the slider 8 is a main body support member 10 .

Between the drive roll 6.7 and the pressure roll 9 there is a mounting table 12 on which the annular body 11 is placed and movable in the same direction as the slider 8.

An electric motor 13 and an intermediate shaft 14 are located on the upper right side of the main body 2.

At the top of the front and rear sides of the quenching tank 1, there are a pair of bearings 16 and 17 that horizontally support the support shaft 15 fixed to the main body support member 10, and on the front side of the quenching tank 1 there is a main body movable piston 18. There is a main body movable cylinder 19 having a main body movable cylinder 19, and a main body movable mechanism 4 is formed by connecting a movable arm 20 at one end of a support shaft 15 and a main body movable piston 18 with a connecting pin 21.

There is a quenching agent 22 inside the quenching tank 1, and there is a supply port 23 and a discharge port 24 for the quenching agent 22 at the lower left side of the quenching tank 1 to keep the liquid level 25 of the quenching agent 22 constant. There is a partition wall 26 on the left side inside the quenching tank 1 for holding it in place.

At the top of the loading section 3 there are a loading button 27 and a discharge button 28 that are slidable perpendicular to the direction of movement of the slider 8.

In the quenching tank 1, a quenching agent 22 is supplied to a supply port 23 from a pump (not shown) separately provided outside the quenching tank 1.
When the liquid level 25 of the quenching agent 22 reaches the upper end of a partition wall 26 provided in the quenching tank 1, the quenching agent 22 overflows and is discharged from the discharge port 24.

The main body portion 2 will be described in detail as follows based on FIGS. 3 and 4.

The main body part 2 has four struts 30 in a direction perpendicular to the axial direction of a support shaft 15 fixed to the main body support member 10 with a key 29.
31゜32.33, each strut 30, 31, 32゜3
A main body support member 10 is fixed to the central part of 3, and a left side plate 34 and a right side plate 35 are respectively fixed to both ends thereof.

Between the main body support member 10 and the left side plate 34, there are support columns 30, 3.
A slider 8 that can be slid by fitting into L32, 33 is provided, and a boss 36 fixed to the slider 8 and a right side plate 3 are provided.
5 is connected to a pressurizing piston 38 of a pressurizing cylinder 37 fixed to the slider 8.
is designed to be slid.

A pressure roll bracket 39 is fixed to the side surface of the slider 8, and a pressure roll 9 having a cylindrical outer surface rotatable about a pressure roll shaft 40 supported by the pressure roll bracket 39 is attached. .

There are two drive roll brackets 4L4 on the side of the left side plate 34.
2 is fixed and each drive roll bracket 41.4
Drive rolls 6.7 each having a cylindrical outer surface rotatable with respect to drive roll shafts 43 and 44 supported by the drive rolls 2 and 2 are mounted, and spur gears 45 and 46 are mounted on the lower end surface of each drive roll 6.7. Each is fixed.

Further, a housing 48 supporting a rotatable gear shaft 41 is fixed to the side surface of the left side plate 34, and a spur gear 49 fixed to the upper end of the gear shaft 47 is connected to a fixed flat gear on each drive roll 6.7. They mesh with gears 45 and 46, respectively, and a bevel gear 50 is fixed to the lower end of the gear shaft 41.

Three bearings 51, 52, and 53 are attached to the lower parts of the left side plate 34, the main body support member 10, and the right side plate 35, respectively, and support a drive shaft 54, and a gear shaft is provided at both ends of the drive shaft 54. A bevel gear 55 and a chain gear 56 that mesh with a bevel gear 50 fixed to 47 are respectively attached.

An electric motor 13 having a chain gear 58 is mounted on a mounting plate 57 fixed to the upper part of the right side plate 35.

As shown in FIGS. 2 and 5, a pair of bearings 59 and 60 for supporting the intermediate shaft 14 are mounted on the mounting plate 57, and chain gears 61 and 62 are fixed to both ends of the intermediate shaft 14, respectively. The chain gear 58 of the electric motor 13 and the intermediate shaft 14
The chain gears 61 of the intermediate shaft 14 and the chain gear 56 of the drive shaft 54 are connected by a chain 64.

Drive shaft 54 is therefore driven by electric motor 13 via chain 63 and chain 64 .

In FIG. 3, between the left side plate 34 and the slider 8 is a holder 6 that can fit and slide on the two lower columns 32 and 33.
5 is provided, and a mounting table 12 is fixed on the holder 65.

A compression spring 66 is interposed between the holder 65 and the slider 8, and the holder 65 and the slider 8 are connected by a shaft 6γ.

One end of the shaft 67 is fixed to the slider 8, and the other end is fixed to the holder 6.
5, the slider 8 can approach the holder 65 when the holder 65 is fixed and the slider 8 is slid in the direction of the holder 65 against the compression spring 66. It looks like this.

In order to reduce the contact area between the mounting table 12 and the annular body 11, several grooves 68 are cut into the upper surface of the mounting table 12.

When the holder 65 slides together with the slider 8, the cylindrical outer surfaces of the drive roll 6°7 and the pressure roll 9 and the mounting table 12
As shown in FIG. 1, cutout grooves 69, 70, and 71 are provided in the mounting table 12, respectively, to prevent them from coming into contact with each other.
A stopper 72 for positioning the mounting table 12 is attached to the left side plate 34.

As shown in FIG. 2, the main body movable mechanism 4 has a main body movable cylinder 19 fixed to the front side surface of the quenching tank 1, and the main body movable piston 18 can move up and down.

The movable arm 20 fixed to the support shaft 15 is rotated with respect to the line of the support shaft 15 by the operation of the main body movable piston 18, so that the main body portion 2 is rotated together with the support shaft 15.

The loading section 3 will be described in detail as follows based on FIGS. 5 and 6.

Two guide grooves 7 are formed on the upper fixing plate 74 of the main body 73 of the loading section.
5. 1 with γ6 and guide grooves 77 and 78 respectively
A pair of button bushing guides 79.80 are mounted, the plate-shaped charging bushing 27 in the upper guide groove 75.77 of the bushing guide 79.80, and the plate-shaped discharge bushing 28 in the bushing guide 79.80. 80 lower guide groove 76.78
They are each guided so that they can slide.

As shown in FIG. 1, the charging bushing 21 and the discharging bushing 28 have respective tip portions 81 and 82 formed in a square shape.

A charging bracket 84 having an elongated hole 83 is attached to the lower surface of the charging busher 27, and a discharge bracket 86 having an elongated hole 85 is attached to the lower surface of the ejecting busher 28.

There is a mounting plate 87 at the bottom of the loading section main body 73.
A pair of brackets 89 and 90 that support both ends of the fixed shaft 88 are fixed on the shaft 7, respectively.

Two pinions 93 and 94 having bushings 91 and 92, respectively, are fitted onto the fixed shaft 88.

Each pinion 93, 94 is meshed with two racks 96, 97 provided via a fixing plate 95 on the mounting plate 87, respectively.

Each rack 96, 97 is guided by two sets of rack guides 98, 99 and rack guides 100 and 101, respectively, so that it can slide on the fixed plate 95, and as shown in FIG. Discharge cylinder 1 fixed to plate 87
The piston 103 of 02 and the piston 105 of the charging cylinder 104 are respectively connected to the ends of each rack 96,97.

Each end of an arm 106 , 107 is fixed to each pinion 93 , 94 , and each arm 106 , 107 is connected to the rack 93 by actuation of a piston 103 of a discharge cylinder 102 and a piston 105 of a charge cylinder 104 .
．． 97 and pinions 93 and 94 to rotate relative to the fixed shaft 88, respectively.

Each arm 106, 107 has a roller shaft 108.10 at each end different from the end at which it is fixed to the pinion 93.94.
9 are attached to each roller shaft 108, 1.
Rollers 110 and 111 are loosely fitted into the rollers 09, respectively.

The roller 110 is inserted into the elongated hole 85 of the ejection bracket 86, and the roller 111 is inserted into the elongated hole 83 of the charging bracket 84. When each arm 106, 107 rotates about the fixed shaft 88, the ejection button 28 and the charging bushing 27 are slid through rollers 110 and 111, respectively.

Reference numerals 112 and 113 are limit switches for confirming the forward and backward positions of the charging button 27, and are respectively attached to the loading section main body 73.

A portal-shaped frame 116 having a pair of shutter guides 114 and 115 is provided on the end of the bushing guide 79, 80 near the quenching tank 1, and a piston 11γ is provided in the upper part of the frame 116. Shutter cylinder 118
is permanently installed.

The piston 117 of the shutter cylinder 118 and the shutter plate 119 are connected by a pin 120.
7, the shutter plate 119 moves to the shutter guide 114,
You can go up and down by being guided by 115.

Note that, as shown in FIG. 8, a long hole 121 is formed in the upper fixing plate T4 so that the charging bracket 84 can pass through when the charging button 2T and the discharge button 28 move forward or backward.
Elongated holes 122 are provided in the ejection button 28, and elongated holes 123 are provided in the upper fixing plate 74 so that the ejection bracket 86 can pass therethrough.

The operation of the apparatus of the present invention constructed as described above will be explained as follows.

The annular body 11 heated to the quenching temperature is first supplied to the loading section 3 and placed on the discharge button 28 .

When the operating cycle is started, the piston 117 of the shutter cylinder 118 is actuated and the shutter plate 119 begins to rise.

The piston 105 of the charging cylinder 104 and the piston 103 of the discharge cylinder 102 start operating at the same time at the rising end of the shutter plate 119. The ejection button 28 slides and moves forward toward the mounting table 12 at the same time.

When the charging button 27 and the discharge button 28 move forward, the annular body 11 that has already been rotary hardened is placed on the mounting table 1.
2, the annular body 11 is sent from the mounting table 12 to the ejection chute 5 while pushing the outer surface of the annular body 11 with the V-shaped end 82 of the ejection bushing 28, and is placed on the ejection bushing 28. The placed annular body 11 is transferred to a predetermined position above the mounting table 12.

Next, when the forward end of the charging bushing 27 and the discharge bushing 28 is confirmed by the limit switch 112, the charging bushing 21 is stopped at the forward position for a certain period of time preset by a timer (not shown) or the like. , ejection cylinder 102
The piston 103 operates in the opposite direction to release the discharge button 28.
begins to retreat.

When the ejection bushing 28 is retracted, the annular body 11 on the ejection bushing 28 is held by the V-shaped end 81 of the stationary charging bushing 27, and the annular body 11 is held on the ejection bushing. 28 onto the mounting table 12.

Next, the charging button 2T, which has been temporarily stopped, moves backward as the piston 105 of the charging cylinder 104 operates in the opposite direction, and the limit switch 113 confirms the backward position.

Next, in response to the confirmation signal from the limit switch 113, the piston 117 of the shutter cylinder 118 is activated to lower the shutter plate 119, and at the same time, the pressure piston 38 is activated to cause the holder 65 to slide together with the slider 8, causing the left side plate 34 to slide.
move forward in the direction of

As the holder 65 moves forward, the annular body 11 on the mounting table 12 simultaneously moves in the direction of the left side plate 34, and when the outer surface of the annular body 11 comes into contact with each cylindrical outer surface of the drive roll 6.7, it stops moving. 12 further advances in the direction of the left side plate 34 together with the slide 8 by the operation of the pressurizing piston 38 until it comes into contact with the stopper 72.

When the pressure piston 38 further operates after the mounting table 12 contacts the stopper 72, since the holder 65 and the shaft 67 are loosely fitted, the slider 8 moves forward while compressing the compression spring 66, and the pressure roll 9 The outer cylindrical surface of the annular body 11 comes into contact with the outer surface of the annular body 11 on the mounting table 12, and the outer surface of the annular body 11 comes to be held between the cylindrical outer surfaces of the two drive rolls 6.7 and the pressure roll 9, While being pressed by the pressure roll 9, the annular body 11 is simultaneously placed on the mounting table 12 by the drive roll 6.7.
The annular body 11 is rotated while the lower end surface of the annular body 11 is sliding.

Next, the main body movable piston 18 operates, and the main body portion 2 rotates with respect to the support shaft 15.

As the main body 2 rotates, the annular body 11 on the mounting table 12 is immersed in the quenching agent 22 in the quenching tank 1 while being rotated and pressurized by the drive roll 6.7 and the pressure roll 9. ,
At the immersed position 11' of the annular body 11 shown in FIG. 2, the main body 2 stops rotating.

Next, when the annular body 11 is rotated and pressurized at the immersion position 11' in the quenching tank 1 and cooled by the quenching agent 22 for a preset time, the movable piston 18 of the main body operates in the opposite direction and descends. ,
The main body part 2 rotates about the support shaft 15, returns to the restoring position, and stops with the upper surface of the mounting table 12 in a horizontal state.

Next, the pressurizing piston 38 operates in reverse and the slider 8 begins to move back.

When the slider 8 retreats, the pressure roll 9 first separates from the outer surface of the annular body 11, and after the holder 65 and the slider 8 are reconnected by the shaft 6T via the compression spring 66, the annular body on the mounting table 12 11 is a holder 65 and a slider 8
At the same time, it retreats and leaves the drive roll 6.7.

At the retreating end of the slider 8, the annular body 11 on the mounting table 12 stops, completing the operating cycle of the device of the present invention.

In Example 1, when the annular body is immersed in the quenching agent in the quenching bath and cooled, a body movable mechanism is used that rotates the body with respect to the support shaft. It is also possible to use an elevating mechanism that moves up and down in a direction perpendicular to the liquid level of the quenching agent.

In addition, while the annular body is being cooled while being rotated and pressurized in the quenching agent inside the quenching tank, a device that directly injects the quenching agent supplied under pressure from a pump outside the quenching tank onto the annular body. When used in combination, the cooling effect is improved and the quenching quality becomes more stable.

Furthermore, it is also possible to provide two different levels of pressurization by switching the fluid circuit supplied to the pressurizing cylinder for pressurizing the outer surface of the annular body during pressurization while rotating the annular body.

As explained above, the present invention includes a quenching tank, a main body installed at the top of the quenching tank, and a loading section for supplying and discharging an annular body heated to a quenching temperature to and from the main body. ,
It consists of a main body movable mechanism that rotates and pressurizes the annular body supplied to the main body while immersing it in the quenching agent in the quenching tank. a pressure roll having a cylindrical outer surface capable of moving in a radial direction toward the center of the annular body outer surface to apply pressure to the annular body outer surface; By using a rotary hardening device for annular bodies, which is composed of a movable mounting table and It has the advantage of stable hardening quality and continuous automatic hardening.

[Brief explanation of drawings]

The drawings show an embodiment of the rotary hardening apparatus for annular bodies according to the present invention, in which FIG. 1 is a plan view, FIG. 2 is a partially cutaway front view, and FIG. 3 is taken along A-A in FIG. 1. Main part sectional view along the line, 4th
The figure is an enlarged sectional view of the main part taken along the line B-B in Fig. 3, Fig. 5 is a sectional view taken along the line C-C in Fig. 2, and Fig. 6 is an enlarged sectional view of the main part taken along the line D-D in Fig. 5. Figure 8 is E of Figure 5.
- A plan view of the main part along line E, Figure 8 is F-F in Figure 5.
FIG. 3 is a rear view of the main parts seen along the line in the direction of the arrow. 1...Quenching tank, 2...Main body, 3...
... Loading section, 4 ... Main body movable mechanism, 6, 7
... Drive roll, 9 ... Pressure roll,
11... Annular body, 12... Mounting table, 2
2...Quenching agent.

Claims (1)

[Claims] 1. A quenching tank, a main body installed on the top of this quenching tank,
A loading section that supplies and discharges the annular body heated to the quenching temperature to and from the main body, and the annular body supplied to the main body is immersed in the quenching agent in the quenching tank while being rotated and pressurized. The main body includes a drive roll having two cylindrical outer surfaces that circumscribe the outer surface of the annular body and rotate the annular body, and a drive roll that moves in a radial direction toward the center of the outer surface of the annular body. A pressure roll having a cylindrical outer surface capable of applying pressure to the outer surface of the annular body, and a mounting table on which the annular body is placed and movable in the same direction as the pressure roll are provided to prevent and correct deformation of the annular body. A rotary hardening device for annular bodies, which is characterized by hardening while heating.