JPH0377254B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to an inner periphery of a cylindrical body in which a plurality of grooves are formed on the inner periphery, one of which is an open end surface and the other is a closed end surface with a handle. The present invention relates to a positioning device for positioning a cylindrical body using a positioning station before hardening a predetermined position on a surface using a hardening station.

(Prior art) Conventionally, in this type of inner circumferential surface hardening of a cylindrical body, when attempting to directly carry the cylindrical body into the quenching station and position it, the inner circumferential surface has a complicated shape, making it difficult to position it. Since there is a risk that the workpiece may come into contact with the heating coil and be damaged, a separate positioning station is provided, and a positioning piece (with an outer periphery that matches the shape of the open end surface of the cylindrical inner periphery) is placed on a table within the positioning station. (regardless of whether the outer circumference is continuous or discontinuous) are fixedly arranged, and manually lift the workpieces one by one, with the open end facing downward, and align the inner circumference with the outer circumference of the positioning piece placed on the table. After the positioning is completed, the handle of the cylindrical body is gripped by a chuck and carried to a quenching station, where it is quenched.

(Problems in the Prior Art) When lifting and positioning a heavy cylindrical body within a positioning station, the positioning process requires complicated and severe labor from the operator, which has been viewed as a problem.

(Object of the Invention) The present invention provides a method for hardening a predetermined position on the inner peripheral surface of a cylindrical body in which a plurality of grooves are formed on the inner peripheral surface, one of which is an open end surface and the other is a closed end surface with a handle, using a quenching station. The present invention was previously developed to solve the above-mentioned problems when positioning the cylinder with a positioning station, and provides a positioning device that can automatically position the cylinder without requiring any human intervention. The purpose is to

(Structure of the Invention) The structure of the present invention is as follows.
(2) An upper center shaft and a lower center shaft, which are arranged facing each other in the downward direction and can be raised and lowered by a driving source, respectively; It has an annular shape that is slightly larger than the inner diameter and is equipped with a mounting table that can be rotated by a rotational drive source. (4) The outer periphery of the lower center shaft in the proximal direction following the enlarged portion is a part of the flange formed close to the base. (5) The outer periphery of the lower tip of the sheath is supported by a compression coil spring whose shoulder is a spring seat and is crimped to the lower end face of the enlarged portion, and the lower center axis is covered by a slidable sheath. (6) The downward and upward displacement positions of the upper center axis and the lower center axis are set on the mounting table. Insert the tip into the center hole in the end face of the handle of the cylinder and the center hole in the bottom of the cylinder placed with the open end in contact with each other, or set the cylinder so that it can be placed on the mounting table without forcing it. (7) The rotational drive source is set to be driven only while the output signal of the detection mechanism that detects and outputs the case where the sheath slides on the lower center shaft and is in a relative downward displacement position continues. A positioning device in a quenching device is characterized by the following.

(Operation of the Invention) The present invention provides an apparatus for manufacturing a cylindrical body in which a plurality of grooves are formed on the inner circumferential surface, one of which is an open end surface and the other is a closed end surface with a handle, and the shaft center and the grooves are randomly positioned. Even when placed on a table, the tapered part formed at the tip of the enlarged part of the lower center shaft that moves upward aligns the axis of the cylinder when it enters the cylinder, and the lower center shaft slides. A positioning piece attached to a movably covering sheath displaces the sheath relatively downward when it is in a state where it is prevented from rising, and drives the rotary drive source, and when it is in a state where it can be raised, it moves the sheath by a spring force. The rotary drive source is stopped by returning from the relative downward displacement, and when the rotary drive source is driven, the mounting table is rotated to maintain the axial center of the cylinder on the mounting table with the upper center axis and the lower center axis, respectively. The bottom has the effect of sliding and rotating on the mounting table to align the grooves.

(Example) The positioning device in the quenching apparatus of the present invention is
The following is a detailed description of the embodiment shown in the figures.

Reference numeral 10 in FIG. 1 indicates the entire apparatus of the embodiment, T indicates a table, and H indicates a through hole of a predetermined inner diameter formed in the table T. On the table T
In the downward direction, an upper center shaft 1 and a lower center shaft 2 whose respective axes are perpendicular lines passing through the center of the through hole H are arranged at predetermined positions so as to face each other. The upper center shaft 1 and the lower center shaft 2 can be moved forward and backward by drive sources, for example cylinders, indicated as C1 and C2, respectively.

Reference numeral 3 denotes a mounting table having an annular shape and arranged on the upper surface of the table T with the above-mentioned perpendicular line as the center. The inner diameter of the upper surface of the mounting table 3 is formed to be slightly larger than the inner diameter of the open end surface of the cylindrical body W to be processed. The mounting table 3 is
For example, the leg portion 3a is provided with a leg portion 3a extending opposite to the inner circumferential wall of the peripheral edge Te which is provided upright on the upper surface of the table T so as to surround the circumferential edge of the through hole H. A ball bearing BB is inserted between it and the peripheral wall. Also, the mounting table 3
A ring-shaped gear 3b is fitted on the outer periphery of the intermediate portion of the
It is fixed and meshes with a drive gear rotationally driven by a rotational drive source indicated as D. Therefore, the mounting table 3 can be rotated if driven by the rotational drive source D.

The lower center shaft 2 has a predetermined range of outer circumference excluding a predetermined length portion at the tip portion, which has a larger diameter than the outer diameter of the main body 21;
It is formed in an enlarged portion 22 that is slidable on the inner circumferential surface of the cylindrical body W. A tapered portion 221 is formed at the distal end portion of the enlarged portion 22 .

A predetermined range of the outer periphery of the main body 21 in the proximal direction of the lower center shaft 2 that is in contact with the enlarged portion 22 is covered with a sheath 5 . The sheath 5 is capable of sliding on the outer periphery of the lower center shaft 2, and has a predetermined spring inserted between its lower end surface and the shoulder of the flange 23 provided toward the base of the lower center shaft 2. It is supported by a compression coil spring 6 having a constant constant so as to come into contact with the enlarged portion 22 under normal conditions. In addition, the outer diameter of the sheath 5 is set to be the same as the outer diameter of the enlarged portion 22 at least in a predetermined range from the tip, and the outer circumference of this portion has a groove corresponding to the shape and arrangement position of the groove Wd on the inner circumferential surface of the cylindrical body W. Multiple positioning pieces 7
is installed. For example, if three grooves Wd are formed at 120° intervals on the inner peripheral surface of the cylindrical body W to be processed, three grooves Wd are formed on the outer periphery of the sheath 5, each having a cross section that matches the shape of the grooves Wd. Positioning piece 7
If the sheath 5 is installed at 120° intervals and four grooves Wd are formed at 90° intervals, there will be grooves on the outer periphery of the sheath 5.
Four positioning pieces 7 having a cross section matching the shape of Wd are installed at 90° intervals.

In addition, the reference angle position at which the positioning piece 7 is attached is as follows:
It is determined by the relative positional relationship between the positioning station where the positioning device is placed and the quenching station, and the cylindrical body, which is carried into the quenching station by gripping the handle Ws with a chuck, is connected to the heating coil, axis, and groove in the quenching station. Needless to say, the positions should be set so as to appropriately face each other.

A skirt indicated as 51 is fixed to the sheath 5 so as to cover the outer periphery of the compression coil spring 6, and its proximal end is bent outward to form a projection 5.
On the other hand, a plate-shaped support member shown as 24 is fixedly arranged near the base of the lower center shaft 2, and a detection mechanism 8, For example, a proximity switch or the like is held and arranged, and the detection mechanism 8 and the protrusion 511 of the skirt 51 are opposed to each other so that they are engaged.

Above lower center shaft 2, sheath 5, skirt 5
1. Regarding the configuration and arrangement relationship between the protrusion 511 and the detection mechanism 8, when the drive source C2 is driven to displace the lower center shaft 2 upward or downward, the support member 24 is fixed to the lower center shaft 2. Therefore, the detection mechanism 8 follows the displacement, and therefore the detection mechanism 8 is also displaced, but since the skirt 51 and the lower center shaft 2 are both fixed to the displacing sheath 5, the engagement relationship between the detection mechanism 8 and the protrusion 511 is maintained. Although it will be maintained. On the other hand, for example, the positioning piece 7 attached to the sheath 5
When the sheath 5 is pressed downward, the sheath 5 slides on the outer circumference of the lower center shaft 2 while compressing the compression coil spring 6 and is displaced downward, and the skirt 51 fixed to the sheath 5 also follows the displacement. However, the detection mechanism 8, which is held via an arm 81 by the support member 24 fixed to the lower center shaft 2, is not displaced relative to the lower center shaft 2. , the engagement relationship between the detection mechanism 8 and the protrusion 511 is released.

Thus, the output signal of the detection mechanism 8 is inputted to the rotational drive source D by, for example, a circuit in which a reversing element is inserted. It is set so that the stopped state is maintained and, conversely, the rotational drive source D is driven without any engagement relationship between the detection mechanism 8 and the protrusion 511.

In other words, the setting is such that the drive is performed only while the output signal of the detection mechanism that detects and outputs the case where the sheath 5 slides with respect to the lower center shaft 2 and is in a relative downward displacement position continues.

Furthermore, when the upper center shaft 1 is displaced downward and the lower center shaft 2 is displaced upward, the respective tips are placed on the end surface of the handle Ws of the cylindrical body W placed on the mounting table 3 with the open end surface in contact with it. A cylindrical body W is installed in each of the center hole Wc1 and the center hole Wc2 on the bottom surface Wb.
The cylindrical body W is inserted so as to hold the axial center of the cylindrical body W without applying strong pressure.

Furthermore, the upper center axis 1 and the lower center axis 2
Each tip is center hole Wc1 and center hole
The point in time when each of Wc2 is inserted is at least the point in time when the tip of the upper center shaft 1 is inserted into the center hole Wc1, and the point in time when the tip of the lower center shaft 2 is inserted into the center hole.
It is preferable to set the timing to be a little earlier than the time when it is inserted into Wc2.

The case where the above embodiment device 10 is used to position a cylindrical body W having a plurality of grooves on its inner circumferential surface, one of which is an open end surface and the other is a closed end surface with a handle, is shown in FIGS. 2a and 2b. This is explained below.

First, the upper center shaft 1 and the lower center shaft 2 are set at an upper displacement position and a lower displacement position, respectively, and the cylindrical body W is placed on the mounting table 3 with the open end surface facing downward. In this state, the axis of the cylinder W and the grooves on the inner peripheral surface may be arranged in random directions. Subsequently, each of the drive sources C1 and C2 is driven, and the upper center shaft 1 and the lower center shaft 2 are respectively displaced downward and upward. In the process of rising, the lower center shaft 2 first enters the tip and then the tapered portion 221 into the cylindrical body W from the open end surface of the cylindrical body W. At this point, the tip of the upper center shaft 1 has not yet reached the center hole Wc1 of the handle Ws of the cylindrical body W. Therefore, as the lower center shaft 2 enters the cylindrical body W with the tapered portion 221 in the front,
The cylindrical body W placed on the mounting table 3 with its axis being randomly moved by sliding its open end edge on the upper surface of the mounting table 3, and following the tapered part 221, the cylindrical body W is placed on the mounting table 3.
2 enters into the cylindrical body W, it is in a state of being penetrated by the lower center shaft 2, and as a result, the axis of the cylindrical body W becomes coaxial with the axis of the lower center shaft 2. The upper center shaft 1 and the lower center shaft 2 each continue to further move downward and upward, and the tips of both center shafts 1 and 2 are inserted into the center holes C1 and C2 of the cylinder W, and the ends of both center shafts 1 and 2 are inserted into the center holes C1 and C2 of the cylinder W. The movement is stopped, and the cylindrical body W is held on the mounting table 3 between the upper center shaft 1 and the lower center shaft 2, which share the same axis, to such an extent that it is not pressed against the mounting table 3.

By the way, during the upward movement of the lower center shaft 2, the positioning piece 7 attached to the sheath 5, which is intended to enter the cylindrical body W following the enlarged portion 22 of the lower center shaft 2, happens to be on the mounting table 3. When the position is aligned with the groove Wd formed on the inner peripheral surface of the cylindrical body W, the positioning piece 7 also moves along the groove Wd on the inner peripheral surface as the lower center shaft 2 rises. The sheath 5 slides upward, so that the sheath 5 is connected to the lower center axis 2
, the engagement relationship between the detection mechanism 8 and the protrusion 511 is maintained, the mounting table 3 does not rotate, and the cylindrical body W on the mounting table 3 is aligned with the upper center axis. The tips of each of the lower center shafts 1 and 2 are inserted into the center hole Wc1 and the center hole Wc2, and the axis alignment of the cylindrical body W and the alignment of the grooves are simultaneously completed, and the positioning is completed.

However, while the lower center shaft 2 is rising, the position of the groove Wd formed in the inner circumferential surface of the cylinder W on the mounting table 3 and the position of the cylinder following the enlarged part 22 of the lower center shaft 2 are different. When the position of the positioning piece 7 that is intended to enter the body W is different from the position of the positioning piece 7, which is the majority of cases, the positioning piece 7 does not rise following the lower center axis 2 due to the discrepancy in the position. sheath 5
The open end surface edge of the cylinder W contacts the upper end surface of the positioning piece 7, and the upper center shaft 1 is inserted into the center hole C1 of the cylinder W to press the cylinder W in the direction of the mounting table 3. Since the positioning piece 7 is prevented from rising, neither the lower center shaft 2 nor the sheath 5 can rise, and the sheath 5 is pressed through the positioning piece 7 and moves against the spring force of the compression coil spring 6 to lower the lower center shaft 2. The main body 22 is slid downward on the outer periphery of the main body 22, and is displaced downward relative to the lower center axis 2, as shown in FIG. 2a. The relative downward displacement position of the sheath 5 is
The engagement relationship between the protrusion 511 and the detection mechanism 8 that has been maintained up to now will be canceled, and the sheath 5
An output signal from the detection mechanism 8 that detects that the rotational drive source D is in a relatively downward displacement position drives the rotational drive source D.
The rotational drive of the rotational drive source D rotates the mounting table 3 via the drive gear 4, and the rotation of the mounting table 3 is performed by inserting the tip into the center holes Wc1 and Wc2, and softening it by both the center shafts 1 and 2. The cylindrical body W held between the two is slid and rotated with its open end surface in contact with the upper surface of the mounting table 3. When the groove Wd on the inner circumferential surface of the cylindrical body W comes into alignment with the positioning piece 7 due to the rotation,
The prevention of rising of the positioning piece 7 is released, and as a result, the sheath 5 slides the positioning piece 7 into the groove Wd by the spring force of the compression coil spring 6, and the sheath 5 itself also moves around the outer periphery of the lower center shaft 2. It slides elastically and rises, and as shown in FIG. 2b, the engagement relationship between the protrusion 511 of the skirt 51 and the detection mechanism 8 is restored, and in response, the rotational drive source D stops driving. , the rotation of the mounting table 3 is stopped, and the cylindrical body W on the mounting table 3 whose rotation is stopped is inserted into the groove on the inner circumferential surface.
This means that the Wd is positioned so that it occupies a position that appropriately faces the heating coil in the quenching station.

(Other Embodiments) In the above embodiment, the legs 3 of the mounting table 3 are connected to the through holes H.
In this example, the mounting table 3 is configured to be rotatable via a ball bearing BB and a peripheral edge formed on the top surface of the table so as to surround the periphery of the table. As long as it has a rotatable configuration, the cylindrical body W on the mounting table 3 can be slid on the mounting table 3 while being centrally supported by the tips of the upper center shaft 1 and the lower center shaft 2, as in the embodiment. Since it has the action of moving and rotating, the same effect as the embodiment is brought about.

Further, in the above embodiment, the presence or absence of an engagement relationship is caused between the protrusion 511 formed on the skirt 51 and the detection mechanism 8 that is displaced together with the lower center shaft 2,
An example has been given in which the drive of the rotational drive source D is controlled in accordance with this. A light source is fixed to the outside of the sheath 5 at one end, while a detection mechanism 8 such as a photoelectric converter is disposed at the other end of the through hole in place of the proximity switch of the embodiment, and the detection mechanism 8 detects whether light is received or not. is configured to detect the sliding of the sheath 5 to detect a relative displacement position as soon as the engagement relationship between the predetermined position of the sheath 5 and the detection mechanism 8 is maintained. The drive may be controlled, and the type of detection means does not matter as long as any detection means can achieve the same effect as the embodiment.

(Effects of the Invention) According to the present invention, the cylindrical body has a plurality of grooves on the inner circumferential surface, one of which is an open end surface and the other is a closed end surface with a handle.
Prior to quenching in the quenching station,
Since the positions of the shaft center and the groove on the inner peripheral surface are automatically positioned in the positioning station so as to appropriately face the heating coil in the quenching station, there is no need for positioning station personnel, and complete automation is achieved. It is prized for its great effects.

[Brief explanation of drawings]

Fig. 1 is a partially sectional front view of an embodiment of the positioning device in the quenching apparatus of the present invention, Fig. 2a is a partially sectional front view showing the main part in the mid-positioning state by the embodiment device, and Fig. 2b is the positioning device. FIG. 3 is a partially sectional front view showing the main parts upon completion. W...Cylinder, Wd...Groove, Ws...Handle, 10...
Positioning device, T... table, H... through hole,
1... Upper center axis, 2... Lower center axis, 22
... Ampullae section, 221 ... Tapered section, 23 ... Flange section, C1 ... Drive source for upper center axis, C2 ... Drive source for lower center axis, 3 ... Mounting table, D ... Rotation drive source, 6... Compression coil spring, 5... Sheath,
7...Positioning piece, 8...Detection mechanism.

Claims (1)

[Claims] 1. Prior to hardening a predetermined position on the inner peripheral surface of a cylinder in which a plurality of grooves are formed on the inner peripheral surface, one of which is an open end surface and the other is a closed end surface with a handle, in a hardening station. , when positioning the cylindrical body with a positioning station, the positioning device uses a perpendicular line passing through the center of a through hole formed in the table in the positioning station with a predetermined inner diameter as an axis in the upper and lower directions of the table. An upper center axis and a lower center axis are arranged opposite to each other and can be raised and lowered by a driving source, respectively, and an upper center axis and a lower center axis are arranged on the top surface of the table, and the inner diameter centered on the perpendicular line is slightly larger than the inner diameter of the open end surface of the cylinder. The lower center shaft has a predetermined annular shape and a mounting table that can be rotated by a rotational drive source, and the lower center shaft has a predetermined range of outer circumference excluding a predetermined length portion of the tip, and a slideable outer diameter on the inner circumferential surface of the cylindrical body. The outer periphery of the lower center shaft in the base direction, which continues to the enlarged part, is formed into a compression coil spring with a shoulder formed in the vicinity of the base serving as a spring seat. The lower center shaft is supported and crimped onto the lower end surface of the enlarged portion, and the lower center shaft is covered by a slidable sheath. A plurality of positioning pieces are attached, and the downward and upward displacement positions of the upper center shaft and the lower center shaft are set on the end surface of the handle of the cylinder, which is placed with its open end surface in contact with the mounting table. The tip is inserted into a certain center hole and the center hole on the bottom surface, and the cylinder is set so as to be able to be placed on the mounting table without forcing it, and the rotational drive source is
1. A positioning device for a quenching device, characterized in that the sheath is set to be driven only while the output signal of a detection mechanism that detects and outputs a case where the sheath is in a relative downward displacement position while sliding on a lower center shaft continues. 2. A patent claim in which the detection mechanism is disposed so as to be displaceable following the displacement of the lower center shaft, and the sliding of the sheath is detected as soon as a predetermined position of the sheath and the detection mechanism maintain a mating relationship. A positioning device in the quenching apparatus according to item 1. 3. The positioning device in a quenching apparatus according to claim 2, wherein the detection mechanism is a proximity switch. 4. The positioning device in a hardening apparatus according to claim 2, wherein the detection mechanism is a photoelectric converter.