Safe metal heat treatment device

Abstract

The invention provides a safe metal heat treatment device, and relates to the technical field of metal heat treatment. Two first connecting blocks are welded to the top end face of the base, a cooling box is rotationally arranged on the two first connecting blocks through a connecting shaft, the cooling box is filled with cooling liquid, two second hydraulic cylinders are fixed to the bottom end face of the inner wall of the cooling box, and the extending ends of the two second hydraulic cylinders are fixed to the bottom end face of a first bearing base. The first bearing seat is of a concave plate-shaped structure. And the auxiliary assembly is arranged, so that the parts are effectively turned over and conveniently and rapidly unloaded. The first motor drives the first threaded rod to rotate to drive the second connecting block and the turning rake to reciprocate front and back, so that the part is turned, and the contact effect of the part and the cooling liquid is improved. During discharging, the second hydraulic cylinder stretches to enable the first bearing seat to be flush with the top end face of the cooling box, and then the parts can be easily pushed out through the turning rake.

Description

Technical Field

[0001] The invention relates to the technical field of metal heat treatment, and in particular to a safe metal heat treatment device. Background Art

[0002] When processing tubular parts, they need to be quenched. During quenching, the parts need to be heated and quickly cooled, and a heat treatment device is needed at this time.

[0003] After the parts are heated, the existing device needs to be transferred to the cooling pool for cooling through manual operation equipment. There is a risk of parts falling during the transfer, which increases safety hazards; the existing device cannot achieve sufficient contact between the parts and the cooling liquid during cooling, which reduces the quenching effect; during the entire quenching process, the existing device cannot achieve both part flipping and part unloading through the flipping structure.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a safe metal heat treatment device is provided to achieve a more practical purpose. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a safe metal heat treatment device to solve the problem that after the parts are heated, they need to be transferred to a cooling pool for cooling through manual operation equipment, and there is a risk of parts falling during the transfer, which increases safety hazards; the existing device cannot achieve sufficient contact between the parts and the cooling liquid during cooling, which reduces the quenching effect; the existing device cannot achieve both part flipping and part unloading through the flipping structure during the entire quenching process.

[0006] The present invention provides a safe metal heat treatment device, which specifically includes: a base; two first connecting blocks are welded on the top end surface of the base, a cooling box is arranged on the two first connecting blocks through a connecting shaft, the cooling box is filled with cooling liquid, two second hydraulic cylinders are fixed on the bottom end surface of the inner wall of the cooling box, the protruding ends of the two second hydraulic cylinders are fixed on the bottom end surface of the first receiving seat, the first receiving seat is a concave plate-shaped structure, the front end surface, rear end surface, left end surface and right end surface of the first receiving seat are respectively in contact with the front end surface, rear end surface, left end surface and right end surface of the inner wall of the cooling box, and the top end surface of the first receiving seat is in a rectangular array with through holes with a circular hole structure.

[0007] Furthermore, the rotational connection position between the first connecting block and the cooling box is on the left side of the center of the cooling box. A first hydraulic cylinder is fixed to the top surface of the base. The extended end of the first hydraulic cylinder is in contact with the right side of the bottom end surface of the cooling box. When the first hydraulic cylinder reciprocates and extends, the cooling box is in a reciprocating swinging state.

[0008] Furthermore, the left end face and the right end face of the inner wall of the cooling box are both provided with grooves in a linear array, and the grooves are semi-cylindrical groove structures, and the height of the grooves is higher than the height of the coolant level; two rectangular plate-shaped mounting plates are symmetrically welded on the bottom end face of the first receiving seat, and spring rods are welded on the outer side of each mounting plate in a linear array, and the spring rods on both sides are elastically in contact with the left end face and the right end face of the inner wall of the cooling box respectively.

[0009] Furthermore, the protruding ends of the spring rods welded in a linear array are polished. After polishing, the protruding ends of the spring rods welded in a linear array are all arc-shaped structures. When the second hydraulic cylinder is extended, the spring rods on both sides are in a continuous elastic clamping state with the grooves on both sides respectively.

[0010] Furthermore, the first connecting block, the cooling box, the first hydraulic cylinder, the second hydraulic cylinder, the first receiving seat, the through hole, the mounting plate, the spring rod and the groove together constitute a cooling component; an auxiliary component is installed on the cooling box, and the auxiliary component is composed of a mounting seat, a guide rod, a second connecting block, a first threaded rod, a first motor and a turning rake, and an L-shaped mounting seat is fixed on the front end face of the cooling box, and two guide rods of cylindrical rod-like structure are welded on the rear end face of the mounting seat, and a second connecting block is slid on the two guide rods; a first threaded rod is rotatable on the mounting seat, and the first threaded rod is threadedly connected to the second connecting block, and a first motor is fixed on the front end face of the mounting seat, and the output shaft of the first motor is fixed to the second connecting block through a coupling.

[0011] Furthermore, the second connecting block is a rectangular block structure, and a turning rake is slidably arranged on the second connecting block, and the bottom end surface of the turning rake contacts with the top end surface of the first receiving seat.

[0012] Furthermore, a heat treatment component is installed on the base, and the heat treatment component consists of a frame, a heating box, a mounting frame, a heating tube, a placement barrel, a first gear, a second motor, a second gear and a force-bearing arm. The base is installed with a heat treatment component, and the heat treatment component is rotated on the frame through two rotating seats. There is a frame, and the frame is located on the left side of the cooling box. A heating box is fixed on the top surface of the frame, and two mounting frames are welded inside the heating box. Heating tubes are fixed on the two mounting frames in a circular array.

[0013] Furthermore, a rotating shaft is rotated on the heating box, and a placement bucket is welded to the right end of the rotating shaft, and tubular parts that need heat treatment are placed in the placement bucket; a first gear is welded on the rotating shaft; a second motor, a second gear and a force-bearing arm are fixed on the frame, a second motor is installed on the base, and a second gear is fixed on the output shaft of the second motor, and the second gear is meshed with the first gear.

[0014] Furthermore, the force-bearing arm is welded to the left end surface of the cooling box, and the upper end of the force-bearing arm is in contact with the top end surface of the frame.

[0015] Furthermore, a sealing assembly is installed on the heating box, and the sealing assembly is composed of a door panel, a third motor and a second threaded rod. A door panel is slid on the heating box, and the left end surface of the door panel is in contact with the right end surface of the placement barrel. The left end surface of the door panel and the right end surface of the placement barrel are polished. A third motor is fixed on the top surface of the heating box, and a second threaded rod is fixed on the output shaft of the third motor. The second threaded rod is threadedly connected to the door panel.

[0016] Compared with the prior art, the present invention has the following beneficial effects: Quenching stage: The equipment uses a unique cooling component design to significantly improve the quenching effect. On the one hand, the second hydraulic cylinder drives the first receiving seat to reciprocate up and down, so that a jet is formed at the through hole, which can not only improve the contact effect between the liquid and the tubular parts, but also enhance the flow rate of the liquid in the cooling box, so that the cooling liquid and the parts are in more full contact; on the other hand, the first hydraulic cylinder drives the cooling box to swing back and forth, which not only adjusts the position of the parts on the first receiving seat, but also further increases the flow rate of the liquid in the box, thereby improving the cooling effect. In addition, the continuous elastic clamping of the spring rod and the groove causes the first receiving seat to vibrate continuously, which helps to speed up the removal of moisture from the parts.

[0017] Parts turning and unloading: The setting of auxiliary components realizes effective turning and convenient unloading of parts. The first motor drives the first threaded rod to rotate, driving the second connecting block and the turning rake to move back and forth, thereby turning the parts and improving the contact effect between the parts and the cooling liquid. When unloading, the second hydraulic cylinder is extended to make the first receiving seat flush with the top surface of the cooling box, and then the turning rake can be used to easily push out the parts.

[0018] Heat treatment stage: The heat treatment component drives the second gear to mesh with the first gear through the second motor, driving the placement barrel to rotate, allowing the tubular parts to roll during the heating process, improving the uniformity and effect of heating. At the same time, the design of the force arm realizes the automatic transfer of parts from the heating box to the cooling box, avoiding manual operation and improving safety. Before the cooling box swings left and right, the second batch of heated parts are added to the placement barrel. During the swing of the cooling box, the second batch of heated parts can be rolled in the placement barrel, improving the heating efficiency of the second batch of parts, and the overall synergy effect is good.

[0019] Sealing design: The sealing component uses a third motor to drive the second threaded rod to realize the opening and closing of the door panel, which can not only seal the heating box but also seal the placement barrel, saving costs while ensuring the function of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0021] In the attached picture: Figure 1 It shows an axial structural schematic diagram of a safe metal heat treatment device according to the present invention; Figure 2 It shows a schematic diagram of the main structure of the safe metal heat treatment device according to the present invention; Figure 3 It is shown that according to the present invention Figure 1 Schematic diagram of the axial structure after rotation; Figure 4 It shows a schematic diagram of the axial structure of the safety metal heat treatment device according to the present invention after partial sectioning; Figure 5 It shows a schematic diagram of the main structure of the partially cut-away safety metal heat treatment device according to the present invention; Figure 6 It is shown that according to the present invention Figure 5 A schematic diagram of the enlarged structure at point A; Figure 7 It shows an axial structural schematic diagram of an auxiliary component according to the present invention; Figure 8 The figure shows an axial structural schematic diagram of a cooling component according to the present invention.

[0022] Reference numerals list 1. Base; 2. Cooling assembly; 201. First connecting block; 202. Cooling box; 203. First hydraulic cylinder; 204. Second hydraulic cylinder; 205. First receiving seat; 206. Through hole; 207. Mounting plate; 208. Spring rod; 209. Groove; 3. Auxiliary components; 301. Mounting seat; 302. Guide rod; 303. Second connecting block; 304. First threaded rod; 305. First motor; 306. Turning rake; 4. Heat treatment assembly; 401. frame; 402. heating box; 403. mounting frame; 404. heating tube; 405. placing barrel; 406. first gear; 407. second motor; 408. second gear; 409. force arm; 5. Sealing assembly; 501. Door panel; 502. Third motor; 503. Second threaded rod. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Unless otherwise defined, all terms (including technical and scientific terms) used in the embodiments of the present invention have the same meanings as commonly understood by those skilled in the art to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless the embodiments of the present invention clearly define such meanings.

[0025] The words "first", "second" and similar words used in the embodiments of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. The words "one", "one" or "the" and similar words do not indicate a quantity limitation, but indicate the existence of at least one. Similarly, the words "include" or "comprise" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. In the following description, the spatial and directional terms such as "upper", "lower", "front", "back", "top", "bottom", "vertical" and "horizontal" may be used to describe the embodiments of the present invention, but it should be understood that these terms are only for the convenience of describing the embodiments shown in the figures, and do not require the actual device to be constructed or operated in a specific orientation. In the following description, the use of terms such as "connect", "couple", "fix" and "attach" may refer to the direct connection between two elements or structures without other elements or structures, or may refer to the indirect connection between two elements or structures through an intermediate element or structure, unless otherwise clearly stated in this article.

[0026] Embodiment 1: As shown in the attached Figure 1 To Attachment Figure 8 As shown: The present invention provides a safe metal heat treatment device, comprising: a base 1; two first connecting blocks 201 are welded on the top surface of the base 1, a cooling box 202 is rotated on the two first connecting blocks 201 through a connecting shaft, the cooling box 202 is filled with cooling liquid, two second hydraulic cylinders 204 are fixed to the bottom end surface of the inner wall of the cooling box 202, the extended ends of the two second hydraulic cylinders 204 are fixed to the bottom end surface of the first receiving seat 205, the first receiving seat 205 is a concave plate-shaped structure, the front end surface, the rear end surface, the left end surface and the right end surface of the first receiving seat 205 are respectively connected to the front end surface, the rear end surface and the left end surface of the inner wall of the cooling box 202 The first receiving seat 205 contacts the right end surface of the inner wall, and the top surface of the first receiving seat 205 is in a rectangular array with through holes 206 with a circular hole structure. During use, the parts to be quenched are placed on the first receiving seat 205. At this time, the parts are in contact with the cooling liquid to realize the quenching step, and the second hydraulic cylinder 204 is driven to reciprocate and extend. The parts follow the first receiving seat 205 to reciprocate up and down. At this time, the through hole 206 is in a jet shape. The jet-like liquid can improve the contact effect with the tubular parts, and the jet-like liquid enhances the liquid flow rate of the cooling box 202, thereby improving the contact effect between the cooling liquid and the parts, and ultimately improving the quenching effect.

[0027] Among them, the rotational connection position between the first connecting block 201 and the cooling box 202 is on the left side of the center of the cooling box 202. A first hydraulic cylinder 203 is fixed to the top surface of the base 1. The protruding end of the first hydraulic cylinder 203 contacts the right side of the bottom surface of the cooling box 202. When the first hydraulic cylinder 203 reciprocates and extends, the cooling box 202 is in a reciprocating swinging state. Through the reciprocating swing of the cooling box 202, the position of the parts on the first receiving seat 205 can be adjusted, and at the same time, the speed of the liquid flow in the cooling box 202 can be increased, thereby ultimately improving the cooling effect of the parts.

[0028] Among them, the left end face and the right end face of the inner wall of the cooling box 202 are both provided with grooves 209 in a linear array, and the grooves 209 are semi-cylindrical groove structures, and the height of the grooves 209 is higher than the height of the cooling liquid level; two rectangular plate-shaped mounting plates 207 are symmetrically welded on the bottom end face of the first receiving seat 205, and the outer side of each mounting plate 207 is welded with spring rods 208 in a linear array, and the spring rods 208 on both sides are elastically contacted with the left end face and the right end face of the inner wall of the cooling box 202 respectively.

[0029] Among them, the protruding ends of the linear array-shaped welded spring rods 208 are all polished, and after polishing, the protruding ends of the linear array-shaped welded spring rods 208 are all arc-shaped structures. When the second hydraulic cylinder 204 is extended, the spring rods 208 on both sides are respectively in a continuous elastic clamping state with the grooves 209 on both sides. During the continuous elastic clamping process, the first receiving seat 205 is in a continuous vibration state. The continuous vibration of the first receiving seat 205 can accelerate the removal of moisture on the parts.

[0030] The first connecting block 201, the cooling box 202, the first hydraulic cylinder 203, the second hydraulic cylinder 204, the first receiving seat 205, the through hole 206, the mounting plate 207, the spring rod 208 and the groove 209 together constitute the cooling component 2; the cooling box 202 is equipped with an auxiliary component 3, which is composed of a mounting seat 301, a guide rod 302, a second connecting block 303, a first threaded rod 304, a first motor 305 and a turning rake 306. There is an L-shaped mounting seat 301, and two cylindrical rod-shaped guide rods 302 are welded to the rear end face of the mounting seat 301, and a second connecting block 303 is slidably arranged on the two guide rods 302; a first threaded rod 304 is rotatably arranged on the mounting seat 301, and the first threaded rod 304 is threadedly connected to the second connecting block 303; a first motor 305 is fixed to the front end face of the mounting seat 301, and the output shaft of the first motor 305 is fixed to the second connecting block 303 through a coupling.

[0031] Among them, the second connecting block 303 is a rectangular block structure, and a turning rake 306 is slid on the second connecting block 303. The bottom end surface of the turning rake 306 contacts the top surface of the first receiving seat 205. When turning the parts, the first motor 305 is driven to rotate reciprocatingly, and the first threaded rod 304 rotates reciprocatingly under the drive of the first motor 305. Under the reciprocating drive of the first threaded rod 304, the second connecting block 303 and the turning rake 306 move back and forth, and the turning of the parts can be realized at this time, which improves the contact effect between the parts and the cooling liquid, and also improves the flow effect of the liquid; when unloading, the second hydraulic cylinder 204 is driven to extend until the bottom end surface of the inner wall of the first receiving seat 205 is flush with the top surface of the cooling box 202. At this time, the first motor 305 is driven to rotate again, and the parts can be pushed out by the turning rake 306 to realize unloading.

[0032] Among them, a heat treatment component 4 is installed on the base 1, and the heat treatment component 4 consists of a frame 401, a heating box 402, a mounting frame 403, a heating tube 404, a placement barrel 405, a first gear 406, a second motor 407, a second gear 408 and a force-bearing arm 409. A heat treatment component 4 is installed on the base 1. The heat treatment component 4 is rotated by two rotating seats on the frame 401. The frame 401 is located on the left side of the cooling box 202. A heating box 402 is fixed on the top surface of the frame 401. Two mounting frames 403 are welded inside the heating box 402. Heating tubes 404 are fixed on the two mounting frames 403 in a circular array.

[0033] Among them, a rotating shaft is rotated on the heating box 402, and a placing bucket 405 is welded to the right end of the rotating shaft, and tubular parts that need heat treatment are placed in the placing bucket 405; a first gear 406 is welded on the rotating shaft; a second motor 407, a second gear 408 and a force arm 409 are fixed on the frame 401, and a second motor 407 is installed on the base 1. A second gear 408 is fixed on the output shaft of the second motor 407, and the second gear 408 is meshed with the first gear 406. When the parts are heated, the power of the second gear 408 is turned on to drive the second motor 407 to rotate. Under the meshing transmission of the second gear 408 and the first gear 406, the placing bucket 405 can be rotated, and the tubular parts can be rolled at this time, thereby improving the heating effect of the tubular parts.

[0034] Among them, the force arm 409 is welded to the left end face of the cooling box 202, and the upper end of the force arm 409 contacts the top surface of the frame 401. When the cooling box 202 swings to the left, the frame 401 is tilted to the right. At this time, the tubular parts automatically fall into the first receiving seat 205, without the need for manual transfer, which is safer.

[0035] Embodiment 2: On the basis of embodiment 1, it also includes: a sealing component 5 is installed on the heating box 402, and the sealing component 5 is composed of a door panel 501, a third motor 502 and a second threaded rod 503. A door panel 501 is slid on the heating box 402, and the left end surface of the door panel 501 is in contact with the right end surface of the placement bucket 405. The left end surface of the door panel 501 and the right end surface of the placement bucket 405 are polished. A third motor 502 is fixed on the top surface of the heating box 402, and a second threaded rod 503 is fixed on the output shaft of the third motor 502. The second threaded rod 503 is threadedly connected to the door panel 501. When the door panel 501 is opened and closed, the third motor 502 can be driven to rotate clockwise or counterclockwise, and the sealing of the heating box 402 and the sealing of the placement bucket 405 can be achieved through the door panel 501, which saves costs.

[0036] The specific usage and function of this embodiment are as follows: The first hydraulic cylinder 203 is driven to retract, and the cooling box 202 tilts to the right. Under the push of the force arm 409, the frame 401 tilts to the left. The third motor 502 is driven to rotate to open the door panel 501, and the tubular parts are placed in the placement bucket 405. The third motor 502 is driven to rotate to close the door panel 501. The power supply of the heating tube 404 is turned on, and the second motor 407 is driven to rotate. Under the meshing transmission of the second gear 408 and the first gear 406, the placement bucket 405 can be rotated. At this time, it can be realized The tubular parts roll; after heating, they need to be kept at a constant temperature for a period of time, and then the tubular parts need to be cooled quickly. During the rapid cooling, the third motor 502 is driven to rotate to open the door panel 501, the first hydraulic cylinder 203 is driven to extend, the cooling box 202 tilts to the left, and the frame 401 tilts to the right. At this time, the tubular parts fall into the first receiving seat 205, and the parts come into contact with the cooling liquid to achieve the quenching step. The second hydraulic cylinder 204 is driven to reciprocate and extend, and the parts follow the first receiving seat 205 to reciprocate up and down At this time, the through hole 206 is in a jet shape for rapid cooling; at the same time, the first hydraulic cylinder 203 is driven to reciprocate and expand, and the cooling box 202 swings back and forth to accelerate cooling. At the same time, the tubular parts can be added to the placement barrel 405 for heat treatment. In this process, the parts can be heated by reciprocating movement in the placement barrel 405; the first motor 305 is driven to reciprocate, and the first threaded rod 304 is reciprocated under the drive of the first motor 305. The two connecting blocks 303 and the turning rake 306 move back and forth, and the parts can be turned over at this time; when unloading, the second hydraulic cylinder 204 is driven to extend, and the spring rod 208 is continuously elastically engaged with the grooves 209 on both sides. During the continuous elastic engagement process, the first receiving seat 205 vibrates continuously to achieve dehydration of the parts; when unloading, when the bottom end surface of the inner wall of the first receiving seat 205 is flush with the top surface of the cooling box 202, the first motor 305 is driven to rotate, and the parts can be pushed out by the turning rake 306 to achieve unloading.

[0037] The above are only specific implementations of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and the protection scope of the present disclosure shall be based on the protection scope of the claims.

Claims

1. A safe metal heat treatment device, characterized in that: include: A base (1); two first connection blocks (201) are welded on the top surface of the base (1); a cooling box (202) is rotatably mounted on the two first connection blocks (201) via a connecting shaft; the cooling box (202) is filled with cooling liquid; two second hydraulic cylinders (204) are fixed to the bottom end surface of the inner wall of the cooling box (202); the extended ends of the two second hydraulic cylinders (204) are fixed to the bottom end surface of a first receiving seat (205); the first receiving seat (205) is a concave plate-shaped structure; the front end surface, the rear end surface, the left end surface and the right end surface of the first receiving seat (205) are respectively connected to the cooling box (20 2), the top end surface of the first receiving seat (205) is provided with through holes (206) of a circular hole structure in a rectangular array; the rotational connection position of the first connecting block (201) and the cooling box (202) is to the left of the center of the cooling box (202); a first hydraulic cylinder (203) is fixed to the top end surface of the base (1), the extended end of the first hydraulic cylinder (203) is in contact with the right side of the bottom end surface of the cooling box (202), and when the first hydraulic cylinder (203) reciprocates and extends, the cooling box (202) is in a reciprocating swinging state.

2. A safe metal heat treatment device as claimed in claim 1, characterized in that: The left end face and the right end face of the inner wall of the cooling box (202) are both provided with grooves (209) in a linear array, and the grooves (209) are semi-cylindrical groove-shaped structures, and the height of the grooves (209) is higher than the height of the cooling liquid surface; two rectangular plate-shaped mounting plates (207) are symmetrically welded to the bottom end face of the first receiving seat (205), and the outer side of each mounting plate (207) is welded with spring rods (208) in a linear array, and the spring rods (208) on both sides are in elastic contact with the left end face and the right end face of the inner wall of the cooling box (202) respectively.

3. A safe metal heat treatment device as claimed in claim 2, characterized in that: The extended ends of the linear array-shaped welded spring rods (208) are polished, and after polishing, the extended ends of the linear array-shaped welded spring rods (208) are all arc-shaped structures. When the second hydraulic cylinder (204) is extended, the spring rods (208) on both sides are in a continuous elastically engaged state with the grooves (209) on both sides.

4. A safe metal heat treatment device as claimed in claim 3, characterized in that: The first connecting block (201), the cooling box (202), the first hydraulic cylinder (203), the second hydraulic cylinder (204), the first receiving seat (205), the through hole (206), the mounting plate (207), the spring rod (208) and the groove (209) together form a cooling component (2); an auxiliary component (3) is mounted on the cooling box (202); the auxiliary component (3) is composed of a mounting seat (301), a guide rod (302), a second connecting block (303), a first threaded rod (304), a first motor (305) and a turning rake (306); the cooling box ( An L-shaped mounting seat (301) is fixed to the front end face of the mounting seat (302), two cylindrical rod-shaped guide rods (302) are welded to the rear end face of the mounting seat (301), and a second connecting block (303) is slidably mounted on the two guide rods (302); a first threaded rod (304) is rotatably mounted on the mounting seat (301), and the first threaded rod (304) is threadedly connected to the second connecting block (303); a first motor (305) is fixed to the front end face of the mounting seat (301), and an output shaft of the first motor (305) is fixed to the second connecting block (303) via a coupling.

5. A safe metal heat treatment device as claimed in claim 4, characterized in that: The second connecting block (303) is a rectangular block structure. A turning rake (306) is slidably mounted on the second connecting block (303). The bottom end surface of the turning rake (306) contacts the top end surface of the first receiving seat (205).

6. A safe metal heat treatment device as claimed in claim 5, characterized in that: A heat treatment component (4) is installed on the base (1), and the heat treatment component (4) is composed of a frame (401), a heating box (402), a mounting frame (403), a heating tube (404), a placement bucket (405), a first gear (406), a second motor (407), a second gear (408) and a force-bearing arm (409). The heat treatment component (4) is installed on the base (1), and the heat treatment component (4) has a frame (401) that rotates on the frame (401) through two rotating seats, and the frame (401) is located on the left side of the cooling box (202). A heating box (402) is fixed on the top surface of the frame (401), and two mounting frames (403) are welded inside the heating box (402), and the heating tubes (404) are fixed on the two mounting frames (403) in a ring array.

7. A safe metal heat treatment device as claimed in claim 6, characterized in that: A rotating shaft is rotatably mounted on the heating box (402), a placement barrel (405) is welded to the right end of the rotating shaft, and tubular parts to be heat treated are placed in the placement barrel (405); a first gear (406) is welded to the rotating shaft; a second motor (407), a second gear (408) and a force-bearing arm (409) are fixed to the frame (401), a second motor (407) is installed on the base (1), a second gear (408) is fixed to the output shaft of the second motor (407), and the second gear (408) is meshed with the first gear (406).

8. A safe metal heat treatment device as claimed in claim 7, characterized in that: The force-bearing arm (409) is welded to the left end surface of the cooling box (202), and the upper end of the force-bearing arm (409) is in contact with the top end surface of the frame (401).

9. A safe metal heat treatment device as claimed in claim 8, characterized in that: The heating box (402) is provided with a sealing assembly (5), which is composed of a door panel (501), a third motor (502) and a second threaded rod (503). A door panel (501) is slidably mounted on the heating box (402), the left end surface of the door panel (501) is in contact with the right end surface of the placement barrel (405), the left end surface of the door panel (501) and the right end surface of the placement barrel (405) are both polished, a third motor (502) is fixed to the top end surface of the heating box (402), the second threaded rod (503) is fixed to the output shaft of the third motor (502), and the second threaded rod (503) is threadedly connected to the door panel (501).

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