A casting heat treatment device and process thereof

Abstract

The invention provides a casting heat treatment device and a process thereof, belonging to the field of heat treatment technology. The casting heat treatment device comprises a quenching box, a bracket and a driving member for driving the bracket to rise and fall. Guide rods with the top end extending out of the quenching box are fixedly installed at the four inner corners of the quenching box, and the bracket is slidably sleeved on the guide rods. The bracket comprises a mounting frame, two mounting plates, a driving assembly, a lower cleaning cylinder, an upper cleaning cylinder and a supporting roller. The four corners of the mounting frame are provided with vertical downward extensions, and rotating shafts are fixedly installed at both ends of the mounting plate. The two mounting plates are symmetrically arranged on both sides of the mounting frame and are rotatably sleeved on the extensions of the mounting frame through the rotating shafts. The lower cleaning cylinders have multiple and symmetrically rotatably sleeved on the opposite side walls of the two mounting plates, and can clean the impurities on the upper and lower surfaces of the casting and in the through hole during the quenching process, thereby avoiding the adhesion of an oxide layer to the surface of the casting after quenching, which affects the subsequent tempering effect.

Description

Technical Field

[0001] The invention belongs to the technical field of heat treatment, and in particular relates to a casting heat treatment device and a process thereof. Background Art

[0002] Casting processing refers to a manufacturing method of metal parts by pouring high-temperature molten metal liquid into a container and cooling it to form it. After the casting is formed, it needs to be heat treated. Heat treatment is an important link in the casting production process. Casting heat treatment mainly includes annealing, normalizing, quenching, tempering and adjustment. During the quenching process, the elements inside the material may react with oxygen to form oxidized impurities, thereby affecting the subsequent tempering and other heat treatment effects.

[0003] A Chinese patent with authorization announcement number CN221235628U discloses a casting processing quenching device, including a quenching tank and a lifting assembly arranged on one side of the quenching tank, the lifting assembly including a stud, a handle, a screw barrel, a filter plate and a filter hole, the inner surface of the stud is rotatably connected to one end of the stud, and the other end of the stud is fixedly mounted with the handle, and the surface of the stud is also threadedly connected to the screw barrel, and the surface of the screw barrel is also fixedly connected to the filter plate, and the surface of the filter plate is slidably connected to the inner surface of the quenching tank. The device can lift the impurities to the surface of the quenching liquid when metal impurities accumulate inside the quenching tank through the operation of the lifting assembly.

[0004] Existing casting heat treatment equipment is usually immersed in a cooling medium during quenching to achieve rapid cooling. The impact force and fluidity of the cooling medium may cause the oxide film to be peeled off or washed away, resulting in some oxidized impurities falling from the surface of the casting. The oxidized impurities are then cleaned, but the oxidized impurities that have not fallen off cannot be cleaned, resulting in an oxide layer attached to the surface of the casting after quenching, affecting the subsequent tempering effect. Summary of the invention

[0005] The purpose of the present invention is to provide a casting heat treatment device and a process thereof, aiming to solve the problem in the prior art that the unremoved oxidized impurities cannot be cleaned, resulting in an oxide layer adhering to the surface of the casting after quenching, affecting the subsequent tempering effect.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a casting heat treatment device, comprising a quenching box, a bracket and a driving member for driving the bracket to rise and fall, guide rods with the tops extending out of the quenching box are fixedly installed at the four corners inside the quenching box, and the bracket is slidably sleeved on the guide rods.

[0007] The bracket includes a mounting frame, two mounting plates, a driving assembly, a lower cleaning cylinder, an upper cleaning cylinder and rollers. The four corners of the mounting frame are provided with vertical downward extensions. Both ends of the mounting plates are fixedly installed with rotating shafts. The two mounting plates are symmetrically arranged on both sides of the mounting frame and are rotatably sleeved on the extensions of the mounting frame through the rotating shafts. The lower cleaning cylinder has multiple and symmetrically rotatably sleeved on the opposite side walls of the two mounting plates. The rollers are installed at one end of the lower cleaning cylinder away from the mounting plate. The upper cleaning cylinder is arranged in the air above the lower cleaning cylinder and is rotatably sleeved on the mounting plate. The driving assembly is arranged at the bottom of the side wall of the guide rod, and is used to drive the mounting plate to flip during the lifting and lowering process of the mounting plate, so that the casting slides between the rollers and the lower cleaning cylinder.

[0008] The effect is that the upper cleaning cylinder and the lower cleaning cylinder can clean the residual oxidized impurities on the upper and lower surfaces of the shovel plate casting, thereby preventing the oxidized impurities from affecting the next step of tempering.

[0009] A connecting groove is provided at one end of the roller away from the mounting plate, a sliding shaft is slidably sleeved inside the connecting groove, and ends of the two sliding shafts close to each other extend out of the connecting groove and are connected with a universal joint.

[0010] The effect is that the connection strength of the two rollers can be ensured while avoiding affecting the turning of the rollers.

[0011] A transmission member a is connected between the multiple lower cleaning cylinders and the multiple upper cleaning cylinders, which is used to make the multiple lower cleaning cylinders rotate synchronously in the same direction and the multiple upper cleaning cylinders rotate synchronously in the same direction. A transmission member b is connected between one group of lower cleaning cylinders and upper cleaning cylinders, which is used to make the lower cleaning cylinders and the upper cleaning cylinders rotate synchronously in the opposite direction. One of the lower cleaning cylinders or the upper cleaning cylinder is driven to rotate by a motor.

[0012] The effect is that the multiple lower cleaning cylinders and the multiple upper cleaning cylinders can be guaranteed to rotate synchronously.

[0013] The driving assembly includes a U-shaped block, a gear, a first rack, a second rack and a locking member for limiting the rotation of the gear. The U-shaped groove of the U-shaped block opens vertically upward, the gear is fixedly mounted at one end of the rotating shaft and corresponds to the U-shaped groove, the first rack and the second rack are respectively located on two opposite inner walls of the U-shaped groove, there are two second racks and they are symmetrically arranged at the top and bottom of the inner wall of the U-shaped groove, and mounting grooves are opened on the two opposite inner walls of the U-shaped groove, the first rack and the second rack are horizontally slidably sleeved in the mounting grooves and elastic members are provided between the mounting grooves.

[0014] The locking member includes three fixed blocks, a transmission plate, a clamping member and a connecting member. The three fixed blocks are arranged on the side wall of the U-shaped block in the vertical direction and correspond to the three mounting grooves respectively. The top and bottom ends of the fixed blocks are inclined surfaces and the angle between them and the U-shaped block is an obtuse angle. The outer wall of one end of the rotating shaft close to the gear is provided with a plurality of clamping grooves evenly distributed along its circumference. The transmission plate is arranged on the side of the U-shaped block where the fixed block is installed. The clamping member is arranged on the transmission plate and one end is slidably sleeved in the clamping groove. The connecting member is arranged on the transmission plate and an elastic member is provided between the transmission plate and the extension part of the mounting frame, and the elastic member whose telescopic direction is perpendicular to the axis of the rotating shaft in the horizontal direction.

[0015] The effect is that it ensures that the rollers can be folded up and down in a set order, so that the workpiece can slide between the lower cleaning cylinder and the upper cleaning cylinder for cleaning, and slide into the rollers again after cleaning.

[0016] The bracket also includes a hole cleaning component, which includes a driving mechanism, a connecting plate, an elastic telescopic rod, a slide groove and a connecting shaft. The connecting plate is arranged in the air below the lower cleaning cylinder. There are multiple elastic telescopic rods and they are evenly and vertically arranged on the connecting plate. The telescopic ends of the elastic telescopic rods are located above the connecting plate. The slide groove is arranged on the mounting plate and below two adjacent lower cleaning cylinders. The slide groove is a closed groove connected end to end, and its upper part is a wavy groove. One end of the connecting shaft extends into the slide groove and is slidably connected to it, and the other end is fixedly connected to the connecting plate. The driving mechanism is arranged at one end of the mounting plate, and is used to drive the connecting plate to slide along the slide groove.

[0017] The driving mechanism includes a limit piece, a lead screw, a slider and a motor. Extension parts are provided at both ends of the mounting plate. The limit piece is arranged in the air below the connecting plate and the two ends are respectively mounted on the extension parts on both sides of the mounting plate. The motor is a forward and reverse motor and is mounted on the mounting plate. One end of the lead screw is rotatably mounted on the extension part on one side of the mounting plate, and the other end is drivingly connected to the output shaft of the motor. There are two sliders and they are symmetrically arranged on both sides of the connecting plate and in conflict with it. The sliders are slidably sleeved on the limit piece and are threadedly connected to the lead screw.

[0018] The effect is that the oxidized impurities on the inner wall of the through hole of the workpiece can be cleaned.

[0019] A circulation component is installed on the outer wall of the quenching box for circulating and cooling the cooling medium in the quenching box. A spray component is installed on one of the guide rods and is arranged parallel to the axis of the roller for flushing the roller during the unloading process after the shovel quenching is completed.

[0020] The effect is that the surface of the workpiece after quenching can be rinsed, and the impurities brushed off by the lower cleaning cylinder and the upper cleaning cylinder are washed down from the surface of the workpiece.

[0021] The present invention also includes a casting heat treatment process, and the process is as follows:

[0022] Step 1: Clean the shovel casting to ensure that the surface of the casting is clean and free of oil, rust and sand. Then check whether the casting has defects such as cracks, pores, etc., and repair it if necessary.

[0023] Step 2: Preheat the shovel casting, place the shovel casting into the heating furnace, and slowly heat it to between 200 and 400 degrees.

[0024] Step 3: Heat and keep the shovel casting warm. Quickly heat the casting to between 840 and 920 degrees and keep it at this temperature for a certain period of time.

[0025] Step 4: Cool the shovel casting. Transfer the shovel casting from the heating furnace to the bracket, and drive the shovel casting down to the quenching box for cooling. During this period, the oxidized impurities on its surface are cleaned by the lower cleaning cylinder and the upper cleaning cylinder 25.

[0026] Step 5: Temper the shovel plate casting. Unload the shovel plate casting after cooling and temper it. Heat the casting to between 150 and 650 degrees, keep it warm for a period of time, and then cool it.

[0027] Step 6: Clean and inspect the shovel casting to remove the oxidized impurities remaining after heat treatment, and check whether the shovel casting has defects such as deformation and cracks after heat treatment.

[0028] The effect is that by using this process to heat treat the casting, the oxidized impurities generated on the surface of the casting can be removed during the quenching process, thereby ensuring the effect of the subsequent tempering.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] During the quenching process, impurities on the upper and lower surfaces of the casting and in the through holes can be cleaned, thereby avoiding the adhesion of an oxide layer on the surface of the casting after quenching, which affects the subsequent tempering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0032] Figure 1 It is a schematic structural diagram of the casting heat treatment device in the present invention;

[0033] Figure 2 It is a structural schematic diagram of the quenching device in the present invention;

[0034] Figure 3 is a schematic structural diagram of the bracket assembly in the present invention;

[0035] Figure 4is a schematic side view of a partial cross-section of the bracket of the present invention;

[0036] Figure 5 for Figure 4 A schematic diagram of the enlarged structure at A in the middle;

[0037] Figure 6 It is a structural schematic diagram of the bracket folding driving mechanism in the present invention;

[0038] Figure 7 It is a front cross-sectional schematic diagram of the bracket folding drive mechanism in the present invention;

[0039] Figure 8 It is a structural schematic diagram of the bracket locking mechanism in the present invention;

[0040] Fig. 9 It is a structural schematic diagram of the casting cleaning mechanism in the present invention;

[0041] Fig.10 It is a schematic diagram of the main structure of the mounting plate in the present invention;

[0042] Fig.11 It is a schematic diagram of the transmission structure of the conveying roller in the present invention.

[0043] In the figure: 1, quenching box; 11, guide rod; 12, spray assembly; 13, circulation assembly; 2, bracket; 21, mounting frame; 22, mounting plate; 221, rotating shaft; 23, driving assembly; 231, U-shaped block; 232, gear; 233, mounting groove; 234a, first rack; 234b, second rack; 235, fixing block; 236, transmission plate; 237, clamping member; 238, connecting member; 239, clamping groove; 24, lower cleaning member Washing drum; 25. Upper cleaning drum; 26. Support roller; 261. Connecting groove; 262. Sliding shaft; 263. Universal joint; 27. Transmission member a; 28. Transmission member b; 29. ​​Hole cleaning assembly; 291. Limiting member; 292. Lead screw; 293. Sliding block; 294. Connecting plate; 295. Elastic telescopic rod; 296. Forward and reverse motor; 297. Sliding groove; 298. Connecting shaft; 3. Driving member; 4. Heating furnace; 5. Tempering furnace; 6. Unloading rack. DETAILED DESCRIPTION

[0044] 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.

[0045] See also Figure 1-Figure 11The present invention provides the following technical solutions: a casting heat treatment device, comprising a quenching box 1 for heat treatment, a bracket 2 for transferring castings into the quenching box 1, and a driving member 3 for driving the bracket 2 to rise and fall, wherein the four corners inside the quenching box 1 are fixedly mounted with guide rods 11 with the tops extending out of the quenching box 1, and the bracket 2 is mounted on the guide rods 11 and connected thereto in an up-and-down sliding manner.

[0046] refer to Figure 2 and Figure 3 As shown, the bracket 2 includes a mounting frame 21, two mounting plates 22, a driving assembly 23, a lower cleaning cylinder 24, an upper cleaning cylinder 25 and a roller 26. The mounting frame 21 is slidably sleeved on the guide rod 11. The four corners of the mounting frame 21 are provided with vertical downward extensions. Both ends of the mounting plate 22 are fixedly installed with a rotating shaft 221. The two mounting plates 22 are symmetrically arranged on both sides of the mounting frame 21 and are rotatably sleeved on the extension of the mounting frame 21 through the rotating shaft 221. The lower cleaning cylinder 24 has multiple and symmetrically rotatably sleeved on the two mountings. On the side walls opposite to the plate 22, the number of rollers 26 is the same as that of lower cleaning cylinders 24 and they are respectively installed at one end of the multiple lower cleaning cylinders 24 away from the mounting plate 22. The number of upper cleaning cylinders 25 is the same as that of the lower cleaning cylinders 24 and they are respectively arranged above the multiple lower cleaning cylinders 24 in the air and rotatably sleeved on the mounting plate 22. The driving assembly 23 is arranged at the bottom of the side wall of the guide rod 11, and is used to drive the rotating shaft 221 and the mounting plate 22 to rotate during the lifting and lowering process of the mounting plate 22, so that the casting slides between the rollers 26 and the lower cleaning cylinders 24.

[0047] The driving member 3 is a motor and is mounted on one of the guide rods 11 , and a lead screw is fixedly mounted on the output shaft thereof, and the lead screw is threadedly connected to the mounting frame 21 .

[0048] refer to Fig.11 As shown, a transmission member a27 is connected between the multiple lower cleaning cylinders 24 and the multiple upper cleaning cylinders 25, and the transmission member a27 is preferably a chain. A transmission member b28 is connected between one group of lower cleaning cylinders 24 and upper cleaning cylinders 25, and the transmission member b28 is preferably a gear, so that the multiple lower cleaning cylinders 24 and the multiple upper cleaning cylinders 25 rotate synchronously in opposite directions, and one of the lower cleaning cylinders 24 or the upper cleaning cylinder 25 is driven to rotate by a motor.

[0049] refer to Figure 4 and Figure 5 As shown, a connecting groove 261 is formed at one end of the roller 26 away from the mounting plate 22 , a sliding shaft 262 is slidably sleeved inside the connecting groove 261 , and one end of two opposite sliding shafts 262 both extend out of the connecting groove 261 and are connected to a universal joint 263 .

[0050] refer to Figure 6-Figure 8As shown, the driving assembly 23 includes a U-shaped block 231, a gear 232, a first rack 234a, a second rack 234b and a locking member. The gear 232 is located in the U-shaped groove of the U-shaped block 231 and is fixedly installed at one end of the rotating shaft 221. The opening direction of the U-shaped groove of the U-shaped block 231 is vertically upward. The first rack 234a and the second rack 234b are respectively located on two opposite inner walls of the U-shaped groove. One side of the teeth of the first rack 234a and the second rack 234b is an inclined surface, and the other side is a vertical surface. The vertical surface of the teeth of the first rack 234a is located on the lower side. The second rack 234b has two and is symmetrically arranged on the top and the inner wall of the U-shaped groove. The bottom, wherein the vertical surface of the teeth of the second rack 234b at the top of the inner wall of the U-shaped groove is located on the lower side, and mounting grooves 233 for mounting the first rack 234a and the second rack 234b are provided on the two opposite inner walls of the U-shaped groove, and the first rack 234a and the second rack 234b are both horizontally slidably sleeved in the mounting groove 233, and elastic members are provided between the first rack 234a, the second rack 234b and the mounting groove 233, and the elastic members are preferably springs, wherein the first rack 234a is located between the two second racks 234b in the vertical direction, and a locking member is provided on one side of the extension portion of the mounting frame 21, for limiting the rotation of the gear 232.

[0051] The locking member includes three fixing blocks 235, a transmission plate 236, a clamping member 237 and a connecting member 238. The three fixing blocks 235 are arranged on the side wall of the U-shaped block 231 in the vertical direction and correspond to the first rack 234a and the two second racks 234b respectively. The top and bottom ends of the fixing blocks 235 are both inclined surfaces and the angle between them and the U-shaped block 231 is greater than 90 degrees. The outer wall of one end of the rotating shaft 221 close to the gear 232 is provided with a plurality of slots 239 evenly distributed along its circumference. The plate 236 is arranged on one side of the U-shaped block 231 on which the fixed block 235 is installed. The side of the transmission plate 236 close to the U-shaped block 231 is an arc surface. One end of the clamping member 237 is slidably sleeved in the slot 239, and the other end is fixedly connected to the transmission plate 236. The connecting member 238 is fixedly installed on one end of the transmission plate 236 close to the extended portion of the mounting frame 21 and an elastic member is provided between the connecting member 238 and the extended portion of the mounting frame 21. The elastic member is retracted in the horizontal direction and is perpendicular to the axis of the rotating shaft 221. The elastic member is a spring.

[0052] refer to Figure 3 , Figure 4 , Fig. 9 and Fig.10As shown, the bracket 2 also includes a hole cleaning component 29 arranged in the air below the lower cleaning cylinder 24, and the hole cleaning component 29 includes a driving mechanism, a connecting plate 294, an elastic telescopic rod 295, a slide 297 and a connecting shaft 298. The connecting plate 294 is arranged in the air below the lower cleaning cylinder 24, and there are multiple elastic telescopic rods 295. The fixed ends of the multiple elastic telescopic rods 295 are evenly installed on the connecting plate 294, and their telescopic ends are located above the connecting plate 294 and point to the shovel plate. The slide 297 is arranged on the mounting plate 22 and is located below two adjacent lower cleaning cylinders 24. The slide 297 is a closed groove connected end to end, and its upper part is a wavy groove. The connecting shaft 298 is arranged on a side of the connecting plate 294 close to the slide 297, and one end of the connecting shaft 298 extends into the slide 297 and is slidably connected thereto. The driving mechanism is arranged at one end of the mounting plate 22, and is used to drive the connecting plate 294 and the connecting shaft 298 to slide along the slide 297.

[0053] The driving mechanism includes a limit member 291, a lead screw 292, a slider 293 and a forward and reverse motor 296. Extension parts are provided at both ends of the mounting plate 22. The limit member 291 is arranged in the air below the connecting plate 294, and the two ends are respectively installed on the extension parts on both sides of the mounting plate 22. The forward and reverse motor 296 is installed on the extension part on one side of the mounting plate 22. One end of the lead screw 292 is rotatably installed on the extension part on the other side of the mounting plate 22, and the other end is connected to the output shaft of the forward and reverse motor 296. There are two sliders 293 symmetrically arranged on both sides of the connecting plate 294 and in conflict with the connecting plate 294. The slider 293 is slidably sleeved on the limit member 291 and is threadedly connected to the lead screw 292.

[0054] A circulation component 13 is installed on the outer wall of the quenching box 1 for circulating and cooling the cooling medium of the quenching box 1. A spray component 12 is installed on one of the guide rods 11 and is arranged parallel to the axis of the roller 26 for flushing the shovel during the unloading process after the quenching is completed.

[0055] The implementation principle of the embodiment of the present invention is as follows: during the heat treatment of the shovel plate, the feeding mechanism conveys the shovel plate to be treated to the roller 26, the driving member 3 drives the mounting frame 21 and the mounting plate 22 to descend, and the casting is immersed in the quenching box 1 for quenching treatment. At this time, part of the oxidized impurities on the surface of the shovel plate are washed away by the impact force and fluidity of the cooling medium (refer to Figure 7-Figure 9) As the mounting plate 22 descends, the gear 232 begins to fall into the U-shaped groove of the U-shaped block 231. When the gear 232 contacts the first rack 234a and the second rack 234b, the transmission plate 236 contacts the fixed block 235 at the same time and slides to its vertical surface through the inclined surface at the top of the fixed block 235. At this time, the transmission plate 236 drives the clamping member 237 to move right, so that the clamping member 237 slides out of the clamping groove 239 to release the lock of the gear 232 and the rotating shaft 221. The gear 232 first contacts the inclined surface of the teeth of the second rack 234b and the first rack 234a located at the top of the inner wall of the U-shaped groove in turn. At this time, the gear 232 presses the two racks into the mounting groove 233. The gear 232 continues to descend and contacts the vertical surface of the second rack 234b located at the bottom of the inner wall of the U-shaped groove. Under the action of the second rack 234b, the gear 232 begins to drive the mounting plate 22 to rotate. (Refer to Figure 4 and Figure 5 ) Since the two rollers 26 are connected by the sliding shaft 262 and the universal joint 263, the two mounting plates 22 drive the lower cleaning cylinder 24, the upper cleaning cylinder 25 and the rollers 26 mounted thereon to flip upward, so that the shovel casting on the roller 26 slides into between the lower cleaning cylinder 24 and the upper cleaning cylinder 25, and the lower cleaning cylinder 24 and the upper cleaning cylinder 25 rotate synchronously in the opposite direction and clean the oxidized impurities remaining on the upper and lower surfaces of the shovel casting. (Refer to Figure 4 and Figure 5 ) At the same time, the forward and reverse motor 296 drives the lead screw 292 to rotate. Since the slider 293 is threadedly connected to the lead screw 292, as the lead screw 292 rotates, the slider 293 drives the connecting plate 294 to move along the slide groove 297 under the action of the connecting shaft 298. At this time, as the connecting plate 294 moves, the telescopic end of the elastic telescopic rod 295 slides along the lower surface of the shovel plate, and when it moves to the through hole, it extends into the through hole. When the connecting shaft 298 moves to the wavy end of the slide groove 297, the connecting plate 294 drives the elastic telescopic rod 295 to reciprocate up and down under the action of the connecting shaft 298, so that the telescopic end of the elastic telescopic rod 295 that extends into the through hole of the shovel plate cleans the oxidized impurities on the inner wall of the through hole.

[0056] After the cleanup is complete, (ref. Figure 7-Figure 9) The mounting plate 22 rises under the drive of the mounting frame 21. At this time, the gear 232 first contacts the inclined surface of the teeth of the second rack 234b at the lower position and presses it into the mounting groove 233. As the mounting plate 22 continues to rise, the gear 232 contacts the vertical surface of the teeth of the first rack 234a and rotates under the action of the first rack 234a. At this time, the two mounting plates 22 drive the lower cleaning cylinder 24, the upper cleaning cylinder 25 and the roller 26 installed thereon to flip downward, so that the shovel plate casting between the lower cleaning cylinder 24 and the upper cleaning cylinder 25 slides onto the roller 26. 22 continues to rise, the gear 232 contacts the vertical surface of the teeth of the second rack 234b at a high position, and rotates under the action of the first rack 234a. At this time, the two mounting plates 22 drive the lower cleaning cylinder 24, the upper cleaning cylinder 25 and the roller 26 installed thereon to flip upward, so that the lower cleaning cylinder 24, the upper cleaning cylinder 25 and the roller 26 are in a horizontal state, the mounting plate 22 continues to rise to the highest point, and brings the shovel plate out of the quenching box 1, the roller 26 rotates to transport the shovel plate to the unloading mechanism, and at the same time, when the shovel plate enters the unloading mechanism, the spray assembly 12 rinses its upper and lower surfaces.

[0057] refer to Figure 1 As shown, the present invention also includes a casting heat treatment process, which specifically includes the following steps:

[0058] Step 1: Clean the shovel casting to ensure that the surface of the casting is clean and free of oil, rust and sand. Then check whether the casting has defects such as cracks, pores, etc., and repair it if necessary.

[0059] Step 2: Preheat the shovel plate casting, put the shovel plate casting into the heating furnace 4, and slowly heat it to between 200 and 400 degrees.

[0060] Step 3: Heat and keep the shovel casting warm. Quickly heat the casting to between 840 and 920 degrees and keep it at this temperature for a certain period of time.

[0061] Step 4: Cool the shovel plate casting. Transfer the shovel plate casting from the heating furnace 4 to the bracket 2, and drive the shovel plate casting down to the quenching box 1 for cooling. During this period, the oxidized impurities on its surface are cleaned by the lower cleaning cylinder 24, the upper cleaning cylinder 25 and the hole cleaning component 29.

[0062] Step 5: Temper the shovel plate casting. After cooling, the shovel plate casting is transferred to the tempering furnace 5 through the unloading rack 6, and the casting is heated to between 150 and 650 degrees, kept warm for a period of time, and then cooled.

[0063] Step 6: Clean and inspect the shovel casting to remove the oxidized impurities remaining after heat treatment, and check whether the shovel casting has defects such as deformation and cracks after heat treatment.

[0064] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A casting heat treatment device, comprising a quenching box, characterized in that: It also includes a bracket and a driving member for driving the bracket to rise and fall. The four corners of the interior of the quenching box are fixedly installed with guide rods whose tops extend out of the quenching box, and the bracket is slidably sleeved on the guide rods. The bracket includes a mounting frame, two mounting plates, a driving assembly, a lower cleaning cylinder, an upper cleaning cylinder and a roller. The four corners of the mounting frame are provided with vertical downward extensions. Both ends of the mounting plate are fixedly mounted with rotating shafts. The two mounting plates are symmetrically arranged on both sides of the mounting frame and are rotatably sleeved on the extensions of the mounting frame through the rotating shafts. The lower cleaning cylinder has multiple and symmetrically rotatably sleeved on the opposite side walls of the two mounting plates. The roller is installed at one end of the lower cleaning cylinder away from the mounting plate. The upper cleaning cylinder is arranged above the lower cleaning cylinder in the air and is rotatably sleeved on the mounting plate. The driving assembly is arranged at the bottom of the side wall of the guide rod and is used to drive the mounting plate to flip during the lifting process of the mounting plate, so that the casting slides between the roller and the lower cleaning cylinder. The driving assembly includes a U-shaped block, a gear, a first rack, a second rack and a locking member for limiting the rotation of the gear. The U-shaped groove of the U-shaped block opens vertically upward, the gear is fixedly mounted at one end of the rotating shaft and corresponds to the U-shaped groove, the first rack and the second rack are respectively located on two opposite inner walls of the U-shaped groove, the second rack has two and is symmetrically arranged at the top and bottom of the inner wall of the U-shaped groove, the two opposite inner walls of the U-shaped groove are both provided with mounting grooves, the first rack and the second rack are both horizontally slidably sleeved in the mounting grooves and an elastic member is provided between the first rack and the second rack; The locking member includes three fixed blocks, a transmission plate, a clamping member and a connecting member. The three fixed blocks are arranged on the side wall of the U-shaped block in the vertical direction and correspond to the three mounting grooves respectively. The top and bottom ends of the fixed blocks are inclined surfaces and the angle between them and the U-shaped block is an obtuse angle. The outer wall of one end of the rotating shaft close to the gear is provided with a plurality of clamping grooves evenly distributed along its circumference. The transmission plate is arranged on the side of the U-shaped block where the fixed block is installed. The clamping member is arranged on the transmission plate and one end is slidably sleeved in the clamping groove. The connecting member is arranged on the transmission plate and an elastic member is arranged between the extension part of the mounting frame and the elastic direction is perpendicular to the axis of the rotating shaft in the horizontal direction. A connecting groove is provided at one end of the roller away from the mounting plate, a sliding shaft is slidably sleeved inside the connecting groove, and ends of the two sliding shafts close to each other extend out of the connecting groove and are connected with a universal joint; A transmission member a is connected between the multiple lower cleaning cylinders and the multiple upper cleaning cylinders, which is used to make the multiple lower cleaning cylinders rotate synchronously in the same direction and the multiple upper cleaning cylinders rotate synchronously in the same direction. A transmission member b is connected between one group of lower cleaning cylinders and upper cleaning cylinders, which is used to make the lower cleaning cylinders and the upper cleaning cylinders rotate synchronously in the opposite direction. One of the lower cleaning cylinders or the upper cleaning cylinder is driven to rotate by a motor.

2. A casting heat treatment device according to claim 1, characterized in that: The bracket also includes a hole cleaning component, which includes a driving mechanism, a connecting plate, an elastic telescopic rod, a slide groove and a connecting shaft. The connecting plate is arranged in the air below the lower cleaning cylinder. There are multiple elastic telescopic rods and they are evenly and vertically arranged on the connecting plate. The telescopic ends of the elastic telescopic rods are located above the connecting plate. The slide groove is arranged on the mounting plate and below two adjacent lower cleaning cylinders. The slide groove is a closed groove connected end to end, and its upper part is a wavy groove. One end of the connecting shaft extends into the slide groove and is slidably connected thereto, and the other end is fixedly connected to the connecting plate. The driving mechanism is arranged at one end of the mounting plate for driving the connecting plate to slide along the slide groove.

3. A casting heat treatment device according to claim 2, characterized in that: The driving mechanism includes a limit piece, a lead screw, a slider and a forward and reverse motor. Both ends of the mounting plate are provided with extension parts. The limit piece is arranged in the air below the connecting plate and both ends are respectively mounted on the extension parts on both sides of the mounting plate. The forward and reverse motor is mounted on the mounting plate. One end of the lead screw is rotatably mounted on the extension part on one side of the mounting plate, and the other end is drivingly connected to the output shaft of the forward and reverse motor. There are two sliders which are symmetrically arranged on both sides of the connecting plate and in conflict with it. The sliders are slidably sleeved on the limit piece and are threadedly connected to the lead screw.

4. A casting heat treatment device according to claim 1, characterized in that: The outer wall of the quenching box is installed with a circulation component for circulating and cooling the cooling medium of the quenching box. A spray component is installed on one of the guide rods and is arranged parallel to the axis of the roller for flushing the roller during the unloading process after the shovel quenching is completed.

5. A casting heat treatment process, characterized in that: The casting heat treatment device as claimed in claim 1 is used, and the process is as follows: Step 1: Clean the shovel casting to ensure that the casting surface is clean and free of oil, rust and sand, and then check whether the casting has defects such as cracks and pores; Step 2: Preheat the shovel casting, put the shovel casting into the heating furnace, and slowly heat it to between 200 and 400 degrees; Step 3: Heat and keep the shovel casting warm, and quickly heat the casting to between 840 and 920 degrees; Step 4: Cool the shovel casting, transfer the shovel casting to the bracket, and drive the shovel casting down to the quenching box for cooling. During this period, the oxidized impurities on its surface are cleaned by the lower cleaning cylinder and the upper cleaning cylinder; Step 5: Temper the shovel casting, unload the cooled shovel casting and temper it, heat the casting to between 150 and 650 degrees, and then cool it; Step 6: Clean and inspect the shovel casting to remove the oxidized impurities remaining after heat treatment, and check whether the shovel casting has deformation and crack defects after heat treatment.

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