KR20100111507A - Apparatus for quenching - Google Patents

Abstract

PURPOSE: A heat treatment apparatus which can heat-treat the inside of a long material with preventing slacking is provided to stably emit cooling water by locating an emitting unit on center. CONSTITUTION: A heat treatment apparatus comprises an inner cooling part(7). The inner cooling part comprises a base(17), a sliding sector(19), a supporting shaft(21), a emitting part(23) and a drooping preventing part. A rail(R) is arranged in the base upper side. The sliding sector moves to the progressive direction of a material(P). One end of the supporting shaft is connected to the sliding sector.

Description

Heat Treatment Equipment {APPARATUS FOR QUENCHING}

The present invention relates to a heat treatment apparatus, and more particularly, to a heat treatment apparatus that can prevent the deflection of the hollow shaft that may be generated during the heat treatment of the hollow shaft.

In general, a heat treatment apparatus using a high frequency, a medium frequency, or a low frequency is a device using a principle that generates high-temperature heat by generating a eddy current in the metal when a high-frequency, mid-frequency, or low-frequency current passes through the metal material.

In the heat treatment apparatus, after the material is heated by the coil, the material is rapidly cooled by the cooling water to form a hardened hardened layer on the surface of the material.

The heat treatment apparatus includes a transfer unit for transferring a material, a heating unit for heating the material transferred by the transfer unit, and a cooling unit for heat treatment by cooling the heated material.

Therefore, the material is conveyed by the conveying part and passed through the heating part, so that the material is heated, and this material can be heat treated by being rapidly cooled by the cooling water while passing through the cooling part.

Furthermore, when the material is a hollow pipe shape, both the inner and outer peripheral surfaces of the material may be heat treated by providing an inner cooling unit for cooling the inner peripheral surface of the material.

At this time, the inner cooling unit enters the inside of the material and heat-treats the inside of the material by spraying cooling water on the inner circumferential surface.

However, when the heat treatment device heats a long material, the length of the inner cooling part for heat-treating the inside of the material is also increased in proportion. In this case, the inner cooling part sags, and thus heat treatment is performed on the inside of the material. There is a problem that is hard to bear.

Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to provide a heat treatment apparatus having an inner cooling unit that can easily heat-treat the inside of a long material by preventing sagging.

In order to achieve the object of the present invention as described above, the present invention is a heat treatment apparatus having an inner cooling unit for heat-treating the inside of the hollow material, the inner cooling unit is a base on which the rail is disposed; A sliding part movably mounted on the rail to reciprocate in a direction of progress of the material; A support shaft having one end connected to the sliding part and having a cooling water passage formed therein; An injection unit provided at the front end of the support shaft to inject the coolant supplied through the passage into the material; And it is provided at the front end and the rear end on the support shaft to prevent the support shaft from sagging by pulling the front end includes a deflection prevention means that the spraying portion can stably spray cooling water into the inside of the material.

As described above, the heat treatment apparatus according to the embodiment of the present invention has an advantage that the spraying unit provided on the support shaft can stably spray the coolant to the inner circumferential surface of the material by preventing the support shaft from sagging by providing the deflection preventing means. .

In addition, by providing the eccentricity prevention means on the support shaft, there is an advantage that the injection unit can always spray the coolant in the center position.

Hereinafter, a heat treatment apparatus according to an embodiment of the present invention will be described in detail by the accompanying drawings.

As shown in Figures 1 to 3, the heat treatment apparatus proposed by the present invention includes a feed roller (1) for transferring the material (P); A heating part 3 for applying a frequency to the material P conveyed by the feed roller 1; An outer cooling unit 5 cooling the outer surface of the raw material P by spraying cooling water on the outer surface of the raw material P passing through the heating unit 3; An inner cooling part 7 which cools the inner surface of the raw material P by spraying cooling water on the inner surface of the raw material P is included.

In the heat treatment apparatus having such a structure, the feed roller 1 is connected to the drive unit (not shown) and rotated. Therefore, when the feed roller 1 is rotated, the material P seated on the feed roller 1 is transferred to the heating unit 3 in a rotating state.

The heating unit 3 includes: an electrode unit 10 connected to a frequency oscillator; The material P may pass therethrough and is connected to the electrode part 10 to receive a frequency from the frequency oscillator and include a heating coil 12 for heating the material P.

Therefore, when a frequency is applied to the material P from the heating coil 12, the material P may be heated to a predetermined temperature.

In this case, the frequency may include not only a high frequency but also a middle frequency or a low frequency.

In addition, the outer cooling unit 5 has one or more cooling water inlets 15 to which cooling water is supplied, and cooling water jets 13 arranged in an annular shape to spray the introduced cooling water.

Therefore, the outer side cooling part 5 can rapidly cool the whole area of the raw material P by spraying cooling water on the surface of the raw material P heated at a predetermined temperature.

As a result, by cooling water is injected into the outer surface of the material (P) it can be quenched and heat treated.

On the other hand, the inner cooling unit (7) and the base (17); A rail (R) disposed above the base (17); A sliding part (19) movably mounted on the rail (R) and capable of reciprocating in the traveling direction of the material (P); A support shaft 21 having one end connected to the sliding part 19 and having a cooling water passage 34 formed therein; An injection unit 23 provided at the front end of the support shaft 21 to inject the cooling water supplied through the passage 34 into the material P; It is provided at the front end and the rear end on the support shaft 21 to prevent the support shaft 21 from sagging by pulling the front end so that the injection unit 23 can stably cool the cooling water into the material (P). Sag prevention means (41) which can be included.

In the inner cooling unit 7 having such a structure, the rails R are supported by support frames 27 provided at the front and rear ends of the base 17, respectively.

And, the sliding unit 19 and the sliding bar 29 is movably coupled to the rail (R); A plate 31 provided above the sliding bar 29; It includes a protrusion bar 33 protruding on the plate 31.

At this time, the sliding bar 29 is coupled to the rail (R) by a linear motor method. That is, when the linear motor M is driven, the sliding bar 29 is moved a predetermined distance along the rail R forward and backward.

The front limit switch S1 and the rear limit switch S2 are disposed at the front end and the rear end of the rail R, respectively.

Therefore, the sliding bar 29 is limited to the forward and backward distance by the front limit switch (S1) and the rear limit switch (S2) during the forward and backward movement.

In addition, the protrusion bar 33 protrudes upward from the plate 31, and the support shaft 21 protrudes from the front surface thereof.

Therefore, when the sliding portion 19 is moved back and forth, the support shaft 21 and the injection portion 23 is moved forward and backward to move forward or backward into the material (P).

A passage 34 is formed inside the support shaft 21, and the passage 34 is connected to a cooling water supply tank (not shown). Therefore, the cooling water supplied from the cooling water supply tank is supplied to the injection portion 23 through this passage 34.

In addition, the injection unit 23 includes a cooling water inlet pipe 35 connected to the passage 34 of the support shaft 21, and a cooling water injection hole 36 arranged in an annular shape to inject the introduced cooling water.

Therefore, the cooling water injected through the cooling water injection hole 36 may be cooled on the entire surface by being sprayed on the inner surface S of the raw material P. FIG.

At this time, the injection unit 23 is in a state capable of moving forward and backward by the sliding unit 19. Therefore, when the sliding part 19 moves forward, the spraying part 23 also moves forward, so that cooling water can be injected to the inner circumferential surface S of the raw material P in the tip direction, and the sliding part 19 moves backward. In this case, by cooling the injection unit 23 also, the cooling water can be injected to the inner circumferential surface S of the raw material P in the rearward direction.

At this time, the material (P) as shown in Figure 1, is supported by a pair of feed rollers (1) in a state of rotating and the linear movement forward and backward along the traveling direction of the material (P).

Therefore, the cooling water injected from the cooling water injection port 36 may uniformly cool the entire inner surface S of the material P.

As a result, the inner surface S of the raw material P is hardened to a predetermined strength or more, so that the wear of the inner surface S may be minimized even when the concrete is transported at a high speed / high pressure state.

The sag preventing means 41 includes a first fixing table 38 disposed at the front end of the support shaft 21, a second fixing table 40 disposed at the rear end of the supporting shaft 21, and the first and A connecting member 42 for pulling the first fixing rod 38 by connecting the second fixing rods 38 and 40 and a support provided on the base 17 to support the support shaft 21 to prevent sagging. The unit 70 is included.

In the sag-preventing means having such a structure, the first fixing stand 38 has a first fastening hole (h1) is formed, the first bolt (B1) is fastened to the first fastening hole (h1) is the connection member ( One end of 42) is connected. In this case, when the first bolt B1 is rotated clockwise and counterclockwise, the first bolt B1 is advanced back and forth at a predetermined distance.

In addition, a second fastening hole h2 is formed in the second fixing stand 40, and a second bolt B2 is fastened to the second fastening hole h2 to connect the other end of the connection member 42. .

In this case, when the second bolt B2 is rotated clockwise and counterclockwise, the second bolt B2 is advanced back and forth at a predetermined distance.

Therefore, by adjusting the distance by rotating the first and second bolts (B1, B2), the tension of the connecting member 42 can also be adjusted.

In this case, the connecting member 42 includes a material having a tension, and preferably includes a wire.

Therefore, the connecting member 42 can prevent the support shaft 21 from sagging by pulling the first fixing stand 38 to a constant tension.

In this way, the connection member 42 can be prevented from sagging by pulling the support shaft 21, it is possible to smoothly cool the inside of the material (P) even when the material (P) is long.

In addition, the support part 70 is preferably provided in pairs, a support plate 72 supporting a support shaft, a piston 76 connected to the support plate 72, and the piston 76. It includes a cylinder 74 for driving the up and down.

The support plate 72 may have a V-shape to efficiently support the support shaft 21. However, the support plate 72 is not limited to the V-shape, and may be deformed into various shapes such as a flat shape.

In addition, the cylinder 74 preferably includes a hydraulic cylinder, and when driven, the piston 76 may be moved up and down.

Therefore, when the support shaft 21 is inserted into the material P, the piston 76 is lowered and the support plate 72 is separated from the support shaft 21 so that only the connecting member 42 is used. The support shaft 21 is supported.

And when the support shaft 21 has moved backward and separated from the inside of the raw material P, the support plate 72 will support the support shaft 21 by raising the piston 76. As shown in FIG.

In this way, the support part 70 can prevent sag by appropriately supporting the support shaft 21 as the support shaft 21 moves forward and backward.

Of course, even when the support shaft 21 is inserted into the material P, the piston 76 may be raised as necessary so that the support plate 72 may support the support shaft.

On the other hand, the support shaft 21 is provided with an eccentric prevention means 44 for preventing the support shaft 21 from being eccentric.

That is, as shown in Figures 3 and 4, the eccentricity prevention means 44 and the insertion tube 46 is inserted into the support shaft 21; A plurality of brackets 48 fixed to the outside of the insertion tube 46 and disposed to be separated by a predetermined angle in a pair; It includes an elastic portion (50, 69) hingedly supported by a plurality of brackets 48 and elastically contacting the inner circumferential surface of the material (P).

The insertion tube 46 has a diameter larger than the diameter of the support shaft 21 can be inserted into the support shaft 21.

The plurality of brackets 48 are arranged such that a pair of brackets 48 are separated from each other by a predetermined distance. Elastic portions 50 and 69 are elastically disposed between the pair of brackets 48.

At this time, the plurality of brackets 48 are preferably arranged at three angles 120 degrees in the radial direction.

The elastic parts 50 and 69 include a pair of elastic members, that is, the first elastic member 50 and the second elastic member 69 disposed at a predetermined distance from the first elastic member 50. The first and second elastic members 50 and 69 are hingedly fixed to the bracket 48 by hinge pins 74.

Accordingly, the first and second elastic members 50 and 69 are elastically rotatable about the hinge pin 74.

As a result, when the second elastic member 69 is in contact with the irregularities formed on the inner circumferential surface of the raw material P in the process of moving the elastic portions 50 and 69 along the inner circumferential surface of the raw material P, the second The elastic member 69 moves inward, and the first elastic member 50 moves relatively outward.

On the contrary, when the first elastic member 50 moves inward, the second elastic member 69 moves inward.

Therefore, by the hinge method, the first elastic member 50 or the second elastic member 69 comes into contact with the inner circumferential surface S of the raw material P, so that the support shaft 21 has a center point O of the raw material P. ) May be disposed.

When describing the elastic portion 50, 69 in more detail, the first elastic member 50 is a spring member 59, the lower end of which is supported on the outer peripheral surface of the insertion tube 46; A bearing 61 provided at an upper end 55 of the spring member 59 and elastically supported on an inner circumferential surface S of the material P; The bearing case 63 is provided in the plurality of brackets 48 to support the bearing 61.

In addition, the spring member 59 has a lower end 57 elastically supported on the outer circumferential surface of the insertion tube 46, and the upper end 55 is in contact with the lower portion of the bearing 61. At this time, the bearing 61 is supported by the bearing case 63.

Therefore, the spring member 59 presses the bearing 61 to the outside, whereby the bearing 61 can elastically contact the inner circumferential surface of the raw material (P).

The second elastic member 69 also has the same shape as the first elastic member 50. That is, the bearing 70 and the bearing case 72 is elastically supported by the spring.

At this time, the first and second elastic members 50 and 69 are positioned at the same length D from the center of the insertion tube 46.

Therefore, since the injection part 23 is located at the center point O by the support shaft 21, the cooling water may be uniformly sprayed on the inner circumferential surface of the material P.

When the injection part 23 is moved back and forth along the inner circumferential surface of the raw material P, when the bearing 70 of the second elastic member 69 contacts the unevenness formed on the inner circumferential surface of the raw material P, 2, the bearing 70 of the elastic member 69 may be elastically contracted into the case 63 by contacting the raw material (P).

At this time, the second elastic member 69 moves inwardly, and the first elastic member 50 moves outwardly.

On the contrary, when the first elastic member 50 moves inward, the second elastic member 69 moves inward.

As a result, in this manner, each bearing 61 is properly brought into contact with the inner circumferential surface S of the work piece P, so that the support shaft 21 can be disposed at the center point O of the work piece P. As shown in FIG.

Hereinafter, the process of the heat treatment in the state to prevent the sag of the material by the inner cooling device will be described in more detail.

In a state where the hollow material P is seated on the feed roller 1, the hollow material P is transferred to the heating coil 23 while rotating by the feed roller 1 while rotating.

When the material P passes inside the circular heating coil 23, a frequency is applied from the heating coil 23 to the material P so that the material P can be heated to a predetermined temperature. have.

As described above, after the raw material P is heated to a constant temperature while passing through the heating unit 3, the raw material P is sprayed with the cooling water on the surface of the raw material P by the outer cooling unit 5 to obtain the raw material ( The entire area of P) can be cooled rapidly.

In addition, the inner surface S of the raw material P is cooled by the inner cooling unit 7, and at the same time, sagging of the raw material P can be prevented.

That is, as the sliding bar 19 of the sliding part 19 is advanced along the rail R by the linear motor method, the support shaft 21 is inserted into the material P.

At this time, since the injection unit 23 is provided at the tip of the support shaft 21, the injection unit 23 is also inserted into the material P.

Therefore, the coolant supplied through the passage 34 of the support shaft 21 is sprayed on the inner circumferential surface of the raw material P through the spraying unit 23, so that the inner circumferential surface of the raw material P may be heat treated.

At this time, the support shaft 21 is supported by the deflection preventing means 41 can be prevented from sagging. That is, since one end of the connecting member 42 is connected to the second fixing stand 40, and the front end of the connecting member 42 is connected to the first fixing stand 38, the connecting member 42 is connected to the first fixing stand 38. The holder 38 is being pulled out.

Therefore, since the support shaft 21 is supported by the connecting member 42, sag can be prevented.

In this way, the cooling water can be injected in a stable state by the injection unit 23 injects the cooling water to the inner circumferential surface of the raw material (P) in the state that the support shaft 21 is prevented from sagging.

In addition, the eccentric prevention means 44 is provided on the support shaft 21 so that the coolant can be injected while the spraying unit 23 maintains its center position.

That is, the bearings 61 and 70 of the first and second elastic members 50 and 69 of the eccentric prevention means 44 elastically contact the inner circumferential surface of the raw material P, respectively.

When the injection part 23 is moved back and forth along the inner circumferential surface of the raw material P, when the bearing 70 of the second elastic member 69 contacts the unevenness formed on the inner circumferential surface of the raw material P, the bearing By contacting the material P 70, it can be elastically retracted into the case 63.

At this time, the second elastic member 69 moves inwardly, and the first elastic member 50 moves outwardly.

On the contrary, when the first elastic member 50 moves inward, the second elastic member 69 moves inward.

As a result, in this manner, each bearing 61, 70 is properly brought into contact with the inner circumferential surface S of the work piece P, so that the support shaft 21 can be arranged at the center point O of the work piece P. .

Therefore, when the injection part 23 is eccentric due to external impact or irregularities on the inner circumferential surface in the process of the injection part 23 moving forward and backward along the longitudinal direction in the inside of the material P, the first and the second By the hinge movement of the elastic members 50 and 69, the injection part 23 can always inject the coolant in the center position.

1 is a plan view showing a heat treatment apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view illustrating the heat treatment apparatus illustrated in FIG. 1.

3 is a view illustrating an internal structure of the heat treatment apparatus shown in FIG. 2.

4 is a perspective view showing the eccentric prevention means shown in FIG.

5 is a view showing a state in which the support shaft is located in the center of the inside by the eccentric prevention means shown in FIG.

Claims (8)

In the heat treatment apparatus provided with the inner cooling unit for heat-treating the inside of the hollow material, The inner cooling unit is a base on which a rail is disposed; A sliding part movably mounted on the rail to reciprocate in a direction of progress of the material; A support shaft having one end connected to the sliding part and having a cooling water passage formed therein; An injection unit provided at a tip of the support shaft and having a coolant injection hole for injecting the coolant supplied through the passage into the material; And And a deflection prevention means provided at the front and rear ends of the support shaft to prevent the support shaft from sagging by pulling the tip so that the spraying part can stably spray cooling water into the material. The method of claim 1, The sliding part and the sliding bar is movably coupled to the rail by a linear motor method; A plate provided on an upper portion of the sliding bar; And a protrusion bar protruding from the plate and having one end of the support shaft connected thereto. The method of claim 1, The deflection preventing means includes a first member disposed at the front end of the support shaft, a second anchor disposed at the rear end of the support shaft, and a connection member for pulling the first anchor by connecting the first and second anchors; And a support portion provided on the base to prevent sag by supporting the support shaft. The method of claim 3, wherein The first fixing rod is formed with a first fastening hole, the first bolt is fastened to the first fastening hole so that one end of the connecting member is connected, and the second fastening stand is formed with a second fastening hole, and the second fastening hole is formed. Heat treatment device, characterized in that the second bolt is fastened to the hole is connected to the other end of the connecting member. The method of claim 3, wherein The support portion includes a support plate for supporting the support shaft, a piston connected to the support plate, and a cylinder for driving the piston up and down. The method of claim 1, Eccentricity prevention means is provided on the support shaft so that the injection portion is located in the center, the eccentric prevention means is inserted into the insertion tube, the support shaft is inserted, and fixed to the outside of the insertion tube to form a pair And a plurality of brackets disposed to be separated by a predetermined angle, and an elastic part supported by the plurality of brackets and elastically contacting the inner circumferential surface of the material. The method of claim 6, The elastic part includes a first elastic member, a second elastic member disposed at a predetermined distance from the first elastic member, and a hinge pin for hingeably connecting the first and second elastic members to the bracket. The first and second elastic members include a spring member having a lower end supported on an outer circumferential surface of the insertion tube, a bearing provided on an upper portion of the spring member to be elastically supported on an inner circumferential surface of the material, and provided in the plurality of brackets. Heat treatment apparatus comprising a case for supporting each. The method of claim 1, A front limit switch and a rear limit switch are disposed at the front and rear ends of the rail, respectively, and the sliding part moves between the front and rear limit switches.

Images