Tempering quenching equipment for front arm of forklift and heat treatment method

Abstract

The invention belongs to the technical field of heat treatment of front arms of forklifts, and relates to tempering and quenching equipment for front arms of forklifts and a heat treatment method.The tempering and quenching equipment comprises small part heat treatment furnaces including a small part quenching furnace, a first small part tempering furnace and a second small part tempering furnace; the small part quenching furnace, the first small part tempering furnace and the second small part tempering furnace are sequentially and linearly installed on the outer side of the horizontal guide rail, and the small part quenching furnace is located on the outer side, close to the quenching water tank, of the horizontal guide rail. The second small part tempering furnace is additionally arranged and combined with flexible movement of the manipulator on the horizontal guide rail, continuous tempering quenching treatment of small forklift front arm products is achieved, the production efficiency is improved, the continuous operation requirement of large-scale production is met, treatment operation of workpieces is facilitated through sequential linear arrangement of all the devices, and the working efficiency is improved. Continuous tempering quenching treatment is carried out through a special small quenching furnace and a special tempering furnace, the treatment temperature and time can be controlled more accurately, and therefore it is guaranteed that the material strength, hardness and abrasion resistance of the small forklift front arm product meet the design requirements.

Description

Technical Field

[0001] The invention relates to the technical field of heat treatment of a forklift forearm, and in particular to a tempering and quenching device and a heat treatment method for a forklift forearm. Background Art

[0002] In modern industrial manufacturing, forklifts are important logistics handling equipment, and their performance stability and durability are directly related to production efficiency and safety. Forklift forearms are key components for forklifts to bear heavy loads and perform lifting operations, and their material strength, hardness and wear resistance are extremely high. In order to meet these requirements, tempering and quenching treatment has become an indispensable part of the forklift forearm manufacturing process.

[0003] Traditional tempering and quenching equipment mostly adopts intermittent operation mode. When facing large-volume and heavy-weight forklift forearm products, the order pressure is relatively small, and because the processing time of large workpieces is long, intermittent operation can still cope with it. However, for small-volume and lightweight small forklift forearm products (referring to products with a height of less than 843mm, a length of less than 1820mm, and a thickness of less than 70mm, and those exceeding it are considered large pieces), since their order volume is usually large, efficient continuous operation is required to meet the quantity requirements. At this time, the intermittent operation mode is not only inefficient, but also cannot meet the continuous operation requirements of large-scale production. In addition, traditional material quenching is mostly placed neatly and directly placed in the quenching furnace by the operating machine. Because the materials are closely arranged, this is easy to cause the materials to stick to each other or quench unevenly during comprehensive quenching. Summary of the invention

[0004] In order to solve the technical problems that existing small forklift forearm products cannot operate continuously and are closely arranged during quenching, resulting in uneven quenching and adhesion, the present invention provides a tempering quenching equipment and a heat treatment method for a forklift forearm.

[0005] The technical solution of the present invention is realized by the following solution: a tempering and quenching device for a forklift forearm, comprising a mounting surface, an operating machine, a material preparation table, a small-piece heat treatment furnace, a large-piece heat treatment furnace and a discharge table, wherein two horizontal guide rails are arranged on the mounting surface, a quenching water tank is provided on the mounting surface between the two horizontal guide rails, the operating machine is installed on the two horizontal guide rails, and the material preparation table, the large-piece heat treatment furnace, the small-piece heat treatment furnace and the discharge table are arranged on the mounting surface in sequence along the horizontal guide rails; The small piece heat treatment furnace comprises a small piece quenching furnace, a first small piece tempering furnace and a second small piece tempering furnace, wherein the small piece quenching furnace, the first small piece tempering furnace and the second small piece tempering furnace are linearly installed on the outside of the horizontal guide rail in sequence, and the small piece quenching furnace is located on the outside of the horizontal guide rail close to the quenching water tank; The large-piece heat treatment furnace includes a large-piece quenching furnace. The large-piece quenching furnace and the small-piece quenching furnace both include a furnace body, a forearm adjustment mechanism, a plurality of split heating rooms and a plurality of lifting bosses. The furnace body is equipped with a forearm adjustment mechanism. Slide rails are arranged at the four corners inside the furnace body. The forearm adjustment mechanism is movably installed on the slide rails. The forearm adjustment mechanisms are connected to the servo motor through a ball screw. The plurality of split heating rooms are movably installed in the furnace body through a pushing cylinder. The plurality of lifting boss arrays are arranged at the bottom of the furnace body. The furnace body is equipped with a plurality of infrared positioning components. The plurality of infrared positioning components correspond one to one with the plurality of split heating rooms.

[0006] Preferably, the forearm adjustment mechanism comprises an electromagnetic clutch, a first cylinder, a second cylinder, a third cylinder and a fourth cylinder, the first cylinder, the second cylinder, the third cylinder and the fourth cylinder are relatively arranged on both sides of the furnace body, the telescopic ends of the first cylinder, the second cylinder, the third cylinder and the fourth cylinder are all provided with an electromagnetic clutch, and the servo motor drives the ball screw to be movably connected with the first cylinder, the second cylinder, the third cylinder and the fourth cylinder; The third cylinder and the fourth cylinder have the same structure. The third cylinder includes a horizontal push cylinder and a vertical push cylinder. The vertical push cylinder is fixedly installed on the telescopic end of the horizontal push cylinder. An electromagnetic clutch is installed on the telescopic end of the vertical push cylinder. The servo motor drives the ball screw to be movably connected with the horizontal push cylinder.

[0007] Preferably, a stirrer is installed in the quenching water tank, and the lifting boss is movably installed at the bottom of the furnace body through a lifting cylinder.

[0008] Preferably, the large-piece heat treatment furnace also includes a large-piece tempering furnace, the large-piece quenching furnace and the large-piece tempering furnace are linearly installed in sequence on the outside of the horizontal guide rail, the small-piece quenching furnace is located between the large-piece quenching furnace and the large-piece tempering furnace, and the large-piece quenching furnace and the small-piece quenching furnace are both located on the outside of the horizontal guide rail close to the quenching water. Preferably, a stirrer is installed in the quenching water tank.

[0009] The heat treatment method for the forklift forearm, the specific processing steps are: Step A: Prepare materials on the material preparation table and determine whether it is a large or small item based on the material preparation list; Step B: operating the machine to take the material; Step C: Processing of large or small items; Step D: The machine runs to the unloading platform to unload.

[0010] Preferably, the specific material taking step of step B comprises: b1, the manipulator moves horizontally on two horizontal guide rails; b2, the operator extends the material picking arm forward to pick up materials with the forklift's front arm.

[0011] Preferably, in step C, the specific steps of processing small items include: c1, operator loading small parts quenching furnace; c2, quenching; c3, after quenching, the operator takes the material and loads it to the quenching water tank for cooling; c4, after cooling is completed, the operating machine takes the material and loads it to the first small piece tempering furnace or the second small piece tempering furnace for tempering; c5, the small parts quenching furnace is emptied, and the operator repeats step B to take the material; c6, repeat steps c1 to c3; c7, the operating machine loads the material into the tempering furnace emptied in step c4 for tempering; c8, after tempering is completed, the operator takes the material and moves it to the unloading platform for unloading; c9, repeat the above steps.

[0012] Preferably, in the small piece processing in step C, the quenching time is 1.5 to 2 hours, the cooling time is 2 to 3 minutes, and the tempering time is 2 to 2.5 hours. Preferably, in step C, the specific steps of processing large items include: c101, operator loads large parts into quenching furnace for quenching; c102, after quenching, the operator takes the material and loads it to the quenching water tank for cooling; c103, after cooling, the operator takes the material and loads it to the large-piece tempering furnace for tempering; c104, unloading.

[0013] Preferably, in the large piece processing in step C, the quenching time is 2 to 3 hours, the cooling time is 3 to 5 minutes, and the tempering time is 3 to 4 hours.

[0014] Preferably, the quenching water tank is externally connected to a closed cooling tower with an operating temperature of 25-45°C.

[0015] In summary, the present invention has the following beneficial effects: 1. The present invention adjusts the quenched forklift forearm through the forearm adjustment mechanism in conjunction with the infrared positioning component corresponding to the split heating chamber, so that the position of the forklift forearm corresponds to the split heating chamber one by one. The forklift forearm material on the operating machine can be easily removed through the lifting boss, thereby reducing the unloading time. The split heating chamber heats the forklift forearm individually, and the lifting boss descends to form a plane during heating, thereby ensuring that each forklift forearm can obtain uniform and sufficient heating, effectively avoiding the adhesion of materials due to centralized heating and poor cooling treatment.

[0016] 2. By adding a second small-piece tempering furnace and combining the flexible movement of the manipulator on the horizontal guide rail, continuous tempering and quenching treatment of small-piece forklift forearm products can be achieved, which improves production efficiency and meets the continuous operation needs of large-scale production. Continuous tempering and quenching treatment is carried out through special small-piece quenching furnaces and tempering furnaces, and the processing temperature and time can be controlled more accurately, thereby ensuring that the material strength, hardness and wear resistance of small-piece forklift forearm products meet the design requirements.

[0017] 3. The quenching time of the small parts quenching furnace plus the cooling time of the quenching water tank is less than the tempering time of the tempering furnace. Therefore, the quenching and tempering processes can be carried out in parallel, so that the production cycle of the entire heat treatment process can be shortened. By alternately using two tempering furnaces, it can be ensured that after the quenching and cooling of the small parts forklift forearm of one batch is completed, after the tempering treatment in one tempering furnace, the quenching and cooling of the small parts forklift forearm of the second batch can be carried out immediately. When the other tempering furnace is tempering, the first tempering furnace has been tempered. At this time, the third batch of production can be carried out immediately, thereby realizing continuous operation production, ensuring that there will be no long-term idleness in the entire production process, and improving the throughput of the production line.

[0018] 4. By arranging the material preparation table, large piece processing furnace, small piece processing furnace and unloading table in a linear sequence, the small piece and large piece processing processes are parallel and partially overlapped in time. When the manipulator is in an idle state in the small piece processing process, it can be immediately used for large piece processing, thereby reducing the idle time of the equipment and realizing the optimal allocation of small and large piece processing resources.

[0019] 4. The agitator installed in the quenching water tank ensures the uniformity of cooling, while the external closed cooling tower ensures that the quenching water tank operates within a stable temperature range (25-45°C), further improving the heat treatment effect and product consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the local structure of quenching of the present invention; Figure 3 It is a schematic diagram of the overall process of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the furnace assembly of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the furnace assembly of the present invention from the main perspective; Figure 6 It is a schematic diagram of the internal structure of the furnace body of the present invention.

[0021] Description of reference numerals: 1. manipulator; 2. forklift forearm; 3. small-piece heat treatment furnace; 31. small-piece quenching furnace; 32. first small-piece tempering furnace; 33. second small-piece tempering furnace; 4. large-piece heat treatment furnace; 41. large-piece quenching furnace; 42. large-piece tempering furnace; 5. horizontal guide rail; 6. material preparation platform; 7. unloading platform; 8. quenching water tank; 10. mixer; 11. Furnace body; 12. Forearm adjustment mechanism; 121. Electromagnetic clutch; 122. First cylinder; 123. Second cylinder; 124. Third cylinder; 125. Fourth cylinder; 13. Split heating room; 14. Push cylinder; 15. Infrared positioning assembly; 16. Ball screw; 17. Slide rail; 18. Lifting boss; 19. Lifting cylinder. DETAILED DESCRIPTION

[0022] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments.

[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure. The present invention is further described in detail below in conjunction with the accompanying drawings.

[0024] Example 1: A tempering and quenching device for a forklift forearm, such as Figure 1-Figure 2As shown, it includes a mounting surface, a manipulator 1, a material preparation table 6, a small-piece heat treatment furnace 3, a large-piece heat treatment furnace 4 and a discharge table 7. Two horizontal guide rails 5 are arranged on the mounting surface. A quenching water tank 8 is provided on the mounting surface between the two horizontal guide rails 5. The manipulator 1 is installed on the two horizontal guide rails 5. The material preparation table 6, the large-piece heat treatment furnace 4, the small-piece heat treatment furnace 3 and the discharge table 7 are arranged on the mounting surface in sequence along the horizontal guide rails 5. The manipulator 1 preferably adopts a 3-ton manipulator 1, and its upper stroke is 400m. m, the effective working area is 8*3.5m, the maximum load capacity is 3000kg, the manipulator 1 moves horizontally between the two horizontal guide rails 5, the large-piece heat treatment furnace 4 and the small-piece heat treatment furnace 3 are both located between the preparation platform 6 and the unloading platform 7, the effective working area of ​​the quenching water tank 8 is 6*4*2m, and the effective volume is 38m³. Since the maximum load capacity of the manipulator 1 is 3000kg, the maximum load capacities of the large-piece heat treatment furnace 4, the small-piece heat treatment furnace 3 and the quenching water tank 8 are all 3000kg.

[0025] The quenching water tank 8 is located on the side where the treatment furnace is arranged. The small-piece heat treatment furnace 3 includes a small-piece quenching furnace 31, a first small-piece tempering furnace 32 and a second small-piece tempering furnace 33. The small-piece quenching furnace 31, the first small-piece tempering furnace 32 and the second small-piece tempering furnace 33 are linearly installed on the outside of the horizontal guide rail 5 in sequence. The small-piece quenching furnace 31 is located on the outside of the horizontal guide rail 5 close to the quenching water tank 8. By adding the second small-piece tempering furnace 33 to the production line, the continuous operation of the small-piece forklift forearm 2 is improved, and the small-piece quenching furnace 31 is completed. Operation, after cooling, transferred to the first small piece tempering furnace 32, at this time the operating machine 1 is in an idle state, the small piece quenching furnace 31 is also in an empty state, and then the operating machine 1 returns to the material taking platform to take materials for the second time, and performs the second furnace operation, and after cooling, transfers to the second small piece tempering furnace 33. At this time, the forklift forearm 2 in the first small piece tempering furnace 32 has been tempered and unloaded, thus starting the third furnace operation, and the operation is continuous in sequence. After adding the second small piece tempering furnace 33, the entire heat treatment process becomes more compact and efficient.

[0026] The large-piece heat treatment furnace 4 also includes a large-piece tempering furnace 42. The large-piece quenching furnace 41 and the large-piece tempering furnace 42 are linearly installed in sequence on the outside of the horizontal guide rail 5. The small-piece quenching furnace 31 is located between the large-piece quenching furnace 41 and the large-piece tempering furnace 42. The large-piece quenching furnace 41 and the small-piece quenching furnace 31 are both located on the outside of the horizontal guide rail 5 close to the quenching water tank 8. A plurality of raised supports are provided on the material preparation table 6 and the unloading table 7. The plurality of raised support arrays are arranged at intervals to facilitate the insertion of the lowering and picking arm of the operating machine 1 for lifting and picking.

[0027] like Figure 1-Figure 2As shown, a stirrer 10 is installed in the quenching water tank 8. The stirrer 10 is bottom-mounted. The large quenching furnace 41 and the small quenching furnace 31 are close to the quenching water tank 8, which is convenient for quickly cooling the materials after quenching. The stirrer 10 can promote the circulation and mixing of water flow. The stirrer 10 has a power of 11kw and controls the flow direction of the quenching medium to make the medium temperature in the quenching tank uniform, effectively improve the cooling capacity of the quenching medium, and improve the quenching effect. The quenching water tank 8 is also equipped with a liquid level detector and a constant temperature detector, which can not only automatically monitor and adjust the water level in the water tank, but also detect in real time and through an external The control cabinet automatically performs water inlet and water replenishment operations to ensure that the water level is always maintained within the preset safety range during the quenching operation, effectively avoiding equipment damage or poor quenching effect caused by too low water level. At the same time, constant temperature detection accurately controls the quenching water temperature and stabilizes it within the quenching temperature range required by the process, thereby ensuring the consistency and high quality of the quenched parts. The control cabinet is equipped with an emergency stop button, which can quickly cut off the power supply or stop operation in case of emergencies, effectively preventing the accident from expanding, protecting the personal safety of operators and the stable operation of equipment, and making the equipment safer and more reliable.

[0028] like Figure 4-Figure 6As shown, the large-piece heat treatment furnace 4 includes a large-piece quenching furnace 41. The large-piece quenching furnace 41 and the small-piece quenching furnace 31 both include a furnace body 11, a forearm adjustment mechanism 12, a plurality of split heating rooms 13 and a plurality of lifting bosses 18. The forearm adjustment mechanism 12 is installed on the furnace body 11. Slide rails 17 are provided at the four corners of the furnace body 11. The forearm adjustment mechanism 12 is movably installed on the slide rails 17. The forearm adjustment mechanism 12 is connected to the servo motor through a ball screw 16. The plurality of split heating rooms 13 are movably installed in the furnace body 11 through a push cylinder 14. The plurality of lifting bosses 18 are arranged in an array on the furnace body 11 bottom, a plurality of infrared positioning components 15 are installed in the furnace body 11, and the plurality of infrared positioning components 15 correspond to the plurality of split heating rooms 13 one by one. The split heating rooms 13 are equipped with electromagnetic heating tubes. The large-piece quenching furnace 41 and the small-piece quenching furnace 31 have the same overall structure except for the size and heating power. When the manipulator 1 brings the raw materials of the forklift forearm 2 into the furnace body 11, the raw materials on the manipulator 1 are lifted by the lifting boss 18. When the manipulator 1 moves to unload the materials, the lifting boss 18 rises and moves relatively, which effectively reduces the unloading time, thereby improving the efficiency of the entire production line. The furnace body 11 has four A slide rail 17 is installed at the corner, and the servo motor drives the ball screw 16 to drive the forearm adjustment mechanism 12 to move horizontally on the furnace body 11, and cooperates with infrared to adjust the position so that it corresponds to multiple split heating rooms 13. The heating of the split heating room 13 is larger than the forearm 2 of the forklift so that the cover buckle can be quenched. When quenching, the lifting boss 18 is recovered to restore the bottom surface of the furnace body 11 to a flat surface. Multiple split heating rooms 13 are pushed down by the push cylinder 14 to cover the forearm 2 of the forklift. One split heating room 13 is driven by two push cylinders 14, and the two push cylinders 14 are located at the split heating room. The two ends of the hot room 13 provide a balancing force to avoid shaking or tilting during heating or moving, ensuring the stability and safety of the equipment. The lifting boss 18 is movably installed at the bottom of the furnace body 11 through the lifting cylinder 19. The lifting cylinder 19 is installed inside the furnace body 11. The lifting boss 18 is arranged in an array. The bottom surface of a single lifting boss 18 is connected to the telescopic ends of multiple lifting cylinders 19, pushing the lifting boss 18 to rise. When quenching is completed and the operating machine 1 takes the material, the lifting boss 1 rises to lift the forklift front arm 2, and the operating machine 1 material taking arm is inserted to take the material.

[0029] The forearm adjustment mechanism 12 includes an electromagnetic clutch 121, a first cylinder 122, a second cylinder 123, a third cylinder 124 and a fourth cylinder 125. The first cylinder 122, the second cylinder 123, the third cylinder 124 and the fourth cylinder 125 are relatively arranged on both sides of the furnace body 11, which is convenient for adsorption and stable adjustment of the forearm 2 of the forklift. The telescopic ends of the first cylinder 122, the second cylinder 123, the third cylinder 124 and the fourth cylinder 125 are all provided with an electromagnetic clutch 121, and the servo motor drives the ball screw 16 to be movably connected with the first cylinder 122, the second cylinder 123, the third cylinder 124 and the fourth cylinder 125, so as to slide There are four rails 17 arranged at four corners, the number of servo motors is preferably four, and the number of ball screws 16 is also preferably four, which respectively drive the corresponding cylinders to move horizontally, and the electromagnetic clutch 121 is used for adsorption and clamping. Because the cylinders are relatively arranged, the total number of cylinders is eight, and the electromagnetic clutch 121 can quickly and reliably adsorb the forearm through electromagnetic action; when it needs to be released after reaching the position, the electromagnetic connection can also be quickly disconnected to achieve rapid separation of the forearm, thereby improving the flexibility and efficiency of adjustment. The third cylinder 124 and the fourth cylinder 125 have the same structure. The third cylinder 124 includes a horizontal push cylinder and a vertical push cylinder. The vertical push cylinder is fixedly installed on the telescopic end of the horizontal push cylinder. The telescopic end of the vertical push cylinder is installed with an electromagnetic clutch 121. The servo motor drives the ball screw 16 to be movably connected with the horizontal push cylinder. The horizontal push cylinder is driven by the ball screw 16, thereby driving the vertical push cylinder to move horizontally. When the telescopic end of the horizontal push cylinder is pushed, the vertical push cylinder can move left and right, and then the telescopic end of the vertical push cylinder drives the electromagnetic clutch 121 to extend, and the forearm of the forklift is adsorbed and adjusted. The first cylinder 122 and the second cylinder 123 are on the same horizontal line, and the third cylinder 124 and the fourth cylinder are located at the same level. Below the cylinder 125, the third cylinder 124 and the fourth cylinder 125 are located on the same horizontal line and work together without affecting each other. The first cylinder 122 is located below the third cylinder 124, and the second cylinder 123 is located below the fourth cylinder 125. When processing large items, the first cylinder 122 and the third cylinder 124 cooperate to grab and adjust, and the second cylinder 123 and the fourth cylinder 125 cooperate to grab and adjust, and jointly undertake the tasks of grabbing and adjusting, thereby improving the overall processing capacity and efficiency of the system. When processing small items, each cylinder can work independently without interfering with each other, thereby realizing optimal allocation and efficient utilization of resources.

[0030] Example 2: A heat treatment method for a forklift forearm, such as Figure 1-Figure 3 As shown, the following steps are included: Step A: The material preparation station 6 prepares the material and determines whether it is a large or small item according to the material preparation list; The staff transports the forged forklift front arm 2 to the material preparation table 6 and determines in advance whether the forklift front arm 2 material to be quenched and tempered is a large piece or a small piece according to the material unloading list.

[0031] Step B: operating machine 1 to take material; b1, the manipulator 1 moves horizontally on two horizontal guide rails 5; b2, the manipulator 1 extends the material-retrieving arm forward to allow the forklift front arm 2 to retrieve the material.

[0032] The travel power of the manipulator 1 is 3kw, which not only ensures sufficient power to support the machine to move smoothly and quickly on the horizontal guide rail 5, but also avoids unnecessary energy waste. The oil pump power is 11kw, which provides a strong hydraulic power for the manipulator 1, so that the material-retrieving arm can be extended quickly and stably to retrieve materials.

[0033] Step C: Processing of large or small items; In step C, the specific steps of small piece processing include: c1, operating machine 1 loading small parts quenching furnace 31; c2, quenching; c3, after quenching is completed, the operating machine 1 takes the material and puts it into the quenching water tank 8 for cooling; c4, after cooling is completed, the operating machine 1 takes the material and loads it to the first small piece tempering furnace 32 or the second small piece tempering furnace 33 for tempering; c5, the small-piece quenching furnace 31 is emptied, and the operating machine 1 repeats step B to take out the material; c6, repeat steps c1 to c3; c7, the operating machine 1 loads the material into the tempering furnace emptied in step c4 for tempering; c8, after tempering is completed, the operating machine 1 takes the material and moves it to the unloading platform 7 for unloading; c9, repeat the above steps.

[0034] The operating machine 1 transports the material to the small piece quenching furnace 31 for quenching, and the quenching time is 1.5 to 2 hours. After the quenching is completed, the operating machine 1 takes the material out of the small piece quenching furnace 31, and then moves it to the quenching water tank 8. The material taking arm descends and enters the quenching water tank 8 for cooling. The cooling time is 2 to 3 minutes. After the cooling is completed, the material is transferred to the first small piece tempering furnace 32 or the second small piece tempering furnace 33 for tempering. The tempering time is 2 to 2.5 hours. At this time, one tempering furnace is idle. When the material is tempered, the small piece quenching furnace 31 and the operating machine are idle. Machines 1 are all in an idle state. At this time, the operator 1 goes to the material preparation table 6 to pick up materials, repeats the above steps, and quenches the materials in the second furnace. After quenching and cooling, the materials are transported to the tempering furnace that was idle during the tempering of the first furnace for tempering. Then the operator 1 starts the third furnace loading and quenching. At this time, the forklift forearm 2 of the first furnace has been tempered and is unloaded. In this way, continuous operations are repeated, which reduces waiting time, significantly improves the processing capacity and efficiency of the overall production line, shortens the production cycle, and thus reduces the order backlog problem caused by the long production cycle.

[0035] When the material is being tempered, the small piece quenching furnace 31 and the operating machine 1 can simultaneously preheat and load the next batch of materials, making full use of resources. At the same time, by rationally scheduling the use of the two tempering furnaces, it is ensured that there is always one tempering furnace in an idle state to receive new tempering tasks at any time, further improving work efficiency.

[0036] Small parts quenching furnace 31 heating power: 240kw, effective working area: 1.9*2.69*0.7m, maximum heating speed: ≤2.5h, rated temperature: 900℃, maximum fork L: 1670mm.

[0037] The first small piece tempering furnace 32 and the second small piece tempering furnace 33 have the same structure, heating power: 125kw, effective working area: 1.9*2.6*0.7m, maximum loading capacity: 3000kg, maximum heating speed: ≤2.5h, maximum fork L: 1670mm, rated temperature: 600℃.

[0038] In step C, the specific steps of large-item processing include: c101, operator 1 loads large parts into quenching furnace 41 for quenching; c102, after quenching, the operating machine 1 takes the material and puts it into the quenching water tank 8 for cooling; c103, after cooling, the operator 1 takes the material and loads it to the large-piece tempering furnace 42 for tempering; c104, unloading.

[0039] The quenching time is 2 to 3 hours, the cooling time is 3 to 5 minutes, and the tempering time is 3 to 4 hours. Due to the large volume and weight of large materials, the quenching, cooling and tempering processes require more energy consumption, and the large forklift forearm 2 can still cope with it by intermittent work. Therefore, in order to reduce energy loss, large-piece processing still adopts intermittent work.

[0040] like Figure 3 As shown, since the small and large piece processing processes are parallel and partially overlapped in time, when the operating machine 1 is in an idle state in the small piece processing process, it can be immediately used for large piece processing, thereby reducing the idle time of the equipment. The parallel operation mode significantly improves the utilization rate and production efficiency of the heat treatment equipment, shortens the production cycle, and realizes the optimal allocation of small and large piece processing resources through reasonable scheduling and flexible use of the operating machine 1, avoiding the waste of resources caused by waiting for a certain link to be completed, making the entire production process more compact and efficient.

[0041] Large piece quenching furnace 41 heating power: 265kw, effective working area: 2.75*3.12*0.7m, maximum heating speed: ≤2.5h, maximum fork L: 2440mm, rated temperature: 900℃.

[0042] Large piece tempering furnace 42 heating power: 140kw, effective working area: 2.75*3.12*0.7m, maximum heating speed: ≤2.5h, maximum fork L: 2440mm, rated temperature: 600℃.

[0043] Step D: The operating machine 1 runs to the unloading platform 7 to unload.

[0044] The quenching water tank 8 is externally connected to a closed cooling tower with an operating temperature of 25-45°C and a water pump power of 7.5kw. Within this temperature range, the quenching tank can maintain a relatively stable temperature, reduce the problem of inconsistent quenching effects caused by temperature fluctuations, and help improve the hardness and wear resistance of the quenched workpiece while reducing the risk of deformation and cracking.

[0045] The parts and equipment all adopt conventional models in the prior art, and the circuit connections adopt conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this manual belong to the prior art known to professional and technical personnel in this field.

[0046] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A tempering and quenching equipment for forklift forearms, characterized in that: It comprises a mounting surface, an operating machine (1), a material preparation table (6), a small-piece heat treatment furnace (3), a large-piece heat treatment furnace (4) and a material unloading table (7), wherein two horizontal guide rails (5) are arranged on the mounting surface, a quenching water tank (8) is provided on the mounting surface between the two horizontal guide rails (5), the operating machine (1) is mounted on the two horizontal guide rails (5), and the material preparation table (6), the large-piece heat treatment furnace (4), the small-piece heat treatment furnace (3) and the material unloading table (7) are arranged in sequence on the mounting surface along the horizontal guide rails (5); The small-piece heat treatment furnace (3) comprises a small-piece quenching furnace (31), a first small-piece tempering furnace (32) and a second small-piece tempering furnace (33), wherein the small-piece quenching furnace (31), the first small-piece tempering furnace (32) and the second small-piece tempering furnace (33) are linearly installed in sequence on the outside of a horizontal guide rail (5), and the small-piece quenching furnace (31) is located on the outside of the horizontal guide rail (5) close to the quenching water tank (8); The large-piece heat treatment furnace (4) comprises a large-piece quenching furnace (41). The large-piece quenching furnace (41) and the small-piece quenching furnace (31) both comprise a furnace body (11), a forearm adjustment mechanism (12), a plurality of split heating chambers (13) and a plurality of lifting bosses (18). The furnace body (11) is provided with a forearm adjustment mechanism (12). Slide rails (17) are provided at four corners inside the furnace body (11). The forearm adjustment mechanism (12) is movably mounted on the slide rails (17). The forearm adjustment mechanism (12) is connected to a servo motor via a ball screw (16). The plurality of split heating chambers (13) are movably mounted in the furnace body (11) via a push cylinder (14). The plurality of lifting bosses (18) are arranged in an array at the bottom of the furnace body (11). The furnace body (11) is provided with a plurality of infrared positioning components (15). The plurality of infrared positioning components (15) correspond one to one to the plurality of split heating chambers (13).

2. The tempering and quenching equipment for a forklift forearm according to claim 1, characterized in that: The forearm adjustment mechanism (12) comprises an electromagnetic clutch (121), a first cylinder (122), a second cylinder (123), a third cylinder (124) and a fourth cylinder (125); the first cylinder (122), the second cylinder (123), the third cylinder (124) and the fourth cylinder (125) are arranged on both sides of the furnace body (11) in a relative manner; the telescopic ends of the first cylinder (122), the second cylinder (123), the third cylinder (124) and the fourth cylinder (125) are provided with an electromagnetic clutch (121); the servo motor drives the ball screw (16) to be movably connected with the first cylinder (122), the second cylinder (123), the third cylinder (124) and the fourth cylinder (125); The third cylinder (124) and the fourth cylinder (125) have the same structure. The third cylinder (124) comprises a horizontal push cylinder and a vertical push cylinder. The vertical push cylinder is fixedly mounted on the telescopic end of the horizontal push cylinder. The telescopic end of the vertical push cylinder is equipped with an electromagnetic clutch (121). The servo motor drives the ball screw (16) to be movably connected to the horizontal push cylinder.

3. The tempering and quenching equipment for a forklift forearm according to claim 1, characterized in that: A stirrer (10) is installed in the quenching water tank (8), and the lifting boss (18) is movably installed on the bottom of the furnace body (11) via a lifting cylinder (19).

4. The tempering and quenching equipment for a forklift forearm according to claim 1, characterized in that: The large-piece heat treatment furnace (4) further comprises a large-piece tempering furnace (42); the large-piece quenching furnace (41) and the large-piece tempering furnace (42) are linearly installed in sequence on the outside of the horizontal guide rail (5); the small-piece quenching furnace (31) is located between the large-piece quenching furnace (41) and the large-piece tempering furnace (42); and the large-piece quenching furnace (41) and the small-piece quenching furnace (31) are both located on the outside of the horizontal guide rail (5) close to the quenching water tank (8).

5. A heat treatment method for a forklift forearm, characterized in that: The forklift forearm is heat treated by the tempering and quenching equipment of the forklift forearm according to claim 2, comprising the following processing steps: Step A: Material preparation table (6) Prepare materials and determine whether they are large or small items based on the material preparation list; Step B: operating machine (1) to take material; Step C: Processing of large or small items; Step D: The operating machine (1) moves to the unloading platform (7) to unload the material.

6. A heat treatment method for a forklift forearm according to claim 4, characterized in that: The specific material taking steps of step B include: b1, the manipulator (1) moves horizontally on two horizontal guide rails (5); b2, the manipulator (1) extends the material-retrieving arm forward to allow the forklift front arm (2) to retrieve the material.

7. A heat treatment method for a forklift forearm according to claim 5, characterized in that: In step C, the specific steps of processing small items include: c1, the operating machine (1) loads the small parts quenching furnace (31); c2, quenching; c3, after quenching is completed, the operating machine (1) takes the material and loads it to the quenching water tank (8) for cooling; c4, after cooling is completed, the operating machine (1) takes the material and loads it into the first small piece tempering furnace (32) or the second small piece tempering furnace (33) for tempering; c5, the small-piece quenching furnace (31) is emptied, and the operating machine (1) repeats step B to take out the material; c6, repeat steps c1 to c3; c7, the operating machine (1) loads the material into the tempering furnace emptied in step c4 for tempering; c8, after tempering is completed, the operating machine (1) takes the material and moves it to the unloading platform (7) for unloading; c9, repeat the above steps.

8. A heat treatment method for a forklift forearm according to claim 6, characterized in that: In the small piece processing of step C, the quenching time is 1.5 to 2 hours, the cooling time is 2 to 3 minutes, and the tempering time is 2 to 2.5 hours.

9. A heat treatment method for a forklift forearm according to claim 6, characterized in that: In step C, the specific steps of large-item processing include: c101, the operating machine (1) loads the large-scale quenching furnace (41) for quenching; c102, after quenching is completed, the operating machine (1) takes the material and loads it to the quenching water tank (8) for cooling; c103, after cooling is completed, the operating machine (1) takes the material and loads it to the large-piece tempering furnace (42) for tempering; c104, unloading.

10. A heat treatment method for a forklift forearm according to claim 9, characterized in that: In the large piece processing of step C, the quenching time is 2 to 3 hours, the cooling time is 3 to 5 minutes, and the tempering time is 3 to 4 hours.

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