Intelligent carbonitriding heat treatment production equipment

Abstract

The invention relates to the technical field of carbonitriding heat treatment, and discloses intelligent carbonitriding heat treatment production equipment which comprises a bottom frame, a heating furnace, a carbonitriding main furnace, a quenching furnace, a pipeline assembly, a conveying rotating mechanism and a positioning assembly, wherein the heating furnace, the carbonitriding main furnace and the quenching furnace are fixedly mounted above the bottom frame, the pipeline assembly is arranged above the carbonitriding main furnace, and the conveying rotating mechanism and the positioning assembly are arranged above the bottom frame. The piston rod steel pipes of different specifications can be supported through the arranged conveying assembly, and the supporting device is composed of two sets of adjacent connecting rod handles on the same horizontal line and a plurality of arc-shaped supporting rods between the two connecting rod handles. Piston rod steel pipes of different specifications are placed above the supporting devices, piston rod steel pipes with large diameters are placed on the lower supporting device, and piston rod steel pipes with small diameters can be supported by the upper supporting device and the lower supporting device, so that the universality of equipment is improved, and the effect of improving product quality and consistency is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of carbonitriding heat treatment, and in particular to intelligent carbonitriding heat treatment production equipment. Background Art

[0002] Intelligent carbonitriding heat treatment production equipment is an advanced equipment that integrates modern information technology and automation technology, and is used for the surface treatment of metal materials. The equipment can automatically control key parameters such as temperature, time, and gas concentration to achieve precise management of the carbonitriding process, thereby improving the hardness, wear resistance, and fatigue resistance of the material. When the intelligent carbonitriding heat treatment production equipment is used for piston rod steel pipes, it can significantly improve the surface hardness, wear resistance, fatigue resistance, and corrosion resistance of the steel pipe.

[0003] The patent with announcement number CN220012773U discloses a carbonitriding heat treatment tool for anti-friction gaskets, including a support frame, a support limiter and a placement plate; the support limiter is pushed inward until its fixed section is completely placed in the first limit groove, and then the placement plate enters the interior of the support frame through the inlet and outlet of the support frame, and the annular groove of the placement plate is aligned with the limit sections of the three support limiters at the same height and lowered to the upper part of the limit section to accommodate the place The placement plate can be smoothly clamped and installed without manual alignment and pressing down, which greatly reduces the intensity of manual labor and correspondingly improves the assembly efficiency; the support limiter is installed on the limit slot, and the limit slot is opened on the connecting column, and the placement plate can be limited in horizontal height only by the support limiter, and the problem of the placement plate sliding up and down will not occur, thereby ensuring its connection stability.

[0004] The prior art has the following defects: Unable to adapt to piston rod steel pipes of various specifications: Piston rod steel pipes are usually used in hydraulic systems, and their specifications such as diameter, length, wall thickness and material type are different. The heating furnace and processing chamber of the existing equipment are fixed in size and cannot accommodate steel pipes of different lengths and diameters. The layout of the gas nozzle and heating element is fixed, which cannot meet the uniform processing requirements of steel pipes of different sizes. It is also unable to automatically identify and adjust process parameters, requiring frequent manual intervention, affecting production efficiency and quality. Therefore, it is necessary to set up a structure that can adapt to piston rod steel pipes of various specifications, improve the versatility of the equipment, enable it to process steel pipes of different sizes, reduce the frequency of equipment replacement, ensure the stability and uniformity of the processing process, and achieve the effect of improving product quality and consistency.

[0005] The piston rod steel pipe cannot rotate in the carbonitriding atmosphere, resulting in uneven local treatment: the conveyor belt of the existing device is generally fixed for transportation, and the piston rod steel pipe cannot be rotated during the transportation process, resulting in uneven distribution of carbon and nitrogen gas on the surface of the steel pipe, resulting in inconsistent thickness and composition of the carburizing layer, affecting the heat treatment effect. Therefore, it is necessary to set up a structure that can make the piston rod steel pipe rotate during transportation, so as to promote more uniform thickness and composition of the carbonitriding layer on the surface of the steel pipe, improve the overall hardness and wear resistance, and achieve the effect of improving production efficiency and product quality. Summary of the invention

[0006] In view of the problems that the existing technology cannot adapt to piston rod steel tubes of various specifications and the piston rod steel tubes cannot be rotated in the carbonitriding atmosphere, resulting in uneven local treatment, an intelligent carbonitriding heat treatment production equipment is proposed.

[0007] The present application provides an intelligent carbonitriding heat treatment production equipment, the purpose of which is to: improve the versatility of the equipment by setting up a conveying and rotating mechanism, so that it can process steel pipes of different sizes, reduce the frequency of equipment replacement, ensure the stability and uniformity of the processing process, and achieve the effect of improving product quality and consistency, and make the piston rod steel pipe rotate during the conveying process, so as to promote the carbonitriding layer thickness and composition on the surface of the steel pipe to be more uniform, improve the overall hardness and wear resistance, and achieve the effect of improving production efficiency and product quality.

[0008] The technical solution of the present invention is: an intelligent carbonitriding heat treatment production equipment, including a base frame, a heating furnace fixedly installed above the base frame, a carbonitriding main furnace and a quenching furnace, a pipeline assembly arranged above the carbonitriding main furnace, a conveying rotating mechanism and a positioning assembly arranged above the base frame, and a piston rod steel pipe arranged above the conveying rotating mechanism, the carbonitriding main furnace is arranged between the heating furnace and the quenching furnace, the conveying rotating mechanism includes two driving shafts rotatably connected to the inner wall of the base frame and symmetrically arranged, the outer walls of the two driving shafts are fixedly connected with two symmetrically arranged internal gears and two external gears, and a conveying assembly is arranged between the multiple internal gears and multiple external gears; The conveying assembly includes two conveyor belts that are transmission-connected between two internal gears and two external gears on the same side; the outer walls of the two conveyor belts are fixedly connected to a plurality of fixed seats; the inner walls of the plurality of fixed seats are rotatably connected to a rotating shaft; one end of the rotating shaft away from the fixed seat is fixedly connected to a rotating gear; and the side of the rotating gear away from the rotating shaft is fixedly connected to a connecting rod handle.

[0009] By adopting the above scheme, piston rod steel pipes of different specifications can be supported by a two-layer support device, which is composed of two groups of adjacent connecting rod handles on the same horizontal line and multiple arc-shaped support rods between the two connecting rod handles. Piston rod steel pipes of different specifications are placed on the upper part of the support device, and the larger diameter is placed on the lower support device, and the smaller diameter can be supported by both the upper and lower support devices. During transportation, the driving shaft drives the inner gear and the outer gear to rotate in the same direction, and the conveyor belt drives the piston rod steel pipe to be transported to the inside of the heating furnace through the fixed seat and the rotating shaft, thereby improving the versatility of the equipment, enabling it to handle steel pipes of different sizes, reducing the frequency of equipment replacement, ensuring the stability and uniformity of the processing process, and achieving the effect of improving product quality and consistency.

[0010] Furthermore, a plurality of arc-shaped support rods are fixedly connected between two of the connecting rod handles on the same horizontal line, a groove is provided between two adjacent arc-shaped support rods, and the piston rod steel pipe is provided between the arc-shaped support rods connected to two adjacent connecting rod handles.

[0011] By adopting the above scheme, through the arc-shaped support rod and the groove, the rotating gear connected to the rotating shaft will rotate during transportation, and drive the arc-shaped support rod to rotate in the same direction through the connecting rod handle, so that under the action of the arc-shaped support rod and the groove, the piston rod steel pipe rotates, thereby promoting the thickness and composition of the carbonitriding layer on the surface of the steel pipe to be more uniform, improving the overall hardness and wear resistance, and achieving the effect of improving production efficiency and product quality.

[0012] Furthermore, a rotating assembly is arranged between the two conveyor belts on the same side, and the rotating assembly includes a fixed rod arranged between a plurality of rotating gears, an upper rack is fixedly connected to the top of the fixed rod, and a lower rack is fixedly connected to the bottom of the fixed rod, the upper rack is meshed with a plurality of rotating gears connected to the outer gear, and the lower rack is meshed with a plurality of rotating gears connected to the inner gear.

[0013] Furthermore, a fixing frame is fixedly connected to one side of the fixing rod close to the external gear, and an outer wall of the fixing frame is fixedly connected to an inner wall of the base frame.

[0014] By adopting the above scheme, through the provided rotating assembly, during the conveying, the rotating gear connected to the rotating shaft will rotate along the upper rack or the lower rack of the fixed rod, achieving the effect of moving and rotating.

[0015] Furthermore, one of the driving shafts is fixedly connected to a servo motor by penetrating the base frame, and the servo motor is arranged outside the base frame.

[0016] By adopting the above scheme, the servo motor is provided to provide power.

[0017] Furthermore, the pipeline assembly includes a plurality of air pumps fixedly mounted on the outside of the base frame, the air inlet ends of the plurality of air pumps are connected with an air supply main pipe, the air outlet ends of the plurality of air pumps are all connected with a gas main pipe, the outer wall of the gas main pipe is connected with a plurality of gas branch pipes, the plurality of gas branch pipes are evenly distributed above the carbonitriding main furnace, and are connected with the interior of the carbonitriding main furnace.

[0018] By adopting the above scheme, through the set pipeline components, the carbonitriding main furnace evenly provides carbon and nitrogen atmosphere from the gas supply main pipe through the gas pump, gas main pipe and gas branch pipe to perform carbonitriding heat treatment on the moving and rotating piston rod steel pipe.

[0019] Furthermore, the positioning assembly includes an adjustable positioning seat fixedly mounted on one side of the base frame, and a telescopic cylinder fixedly mounted on the other side of the base frame, and the telescopic cylinder and the adjustable positioning seat are symmetrically arranged on both sides of the base frame.

[0020] Furthermore, a telescopic rod is sleeved on the output end of the telescopic cylinder, and a push rod is fixedly connected to one end of the telescopic rod close to the piston rod steel pipe, and a plurality of swing blocks are hinged at the bottom of the push rod.

[0021] By adopting the above scheme, a positioning component is set up, and in order to make the carbon and nitrogen gases released by the fixedly arranged gas nozzles and heating elements penetrate into the surface of the piston rod steel tube more evenly, the telescopic cylinder is operated before the piston rod steel tube enters the heating furnace. The output end of the telescopic cylinder drives the telescopic rod to move, and the piston rod steel tube is pushed onto the adjustable positioning seat through the push rod, so that the position of the piston rod steel tube is unified, which is convenient for the uniform penetration of carbon and nitrogen gas, and the swing block set at the bottom of the push rod can effectively avoid the collision of the push rod and the upper support device.

[0022] Beneficial effects of the present invention: 1. Through the provided conveying assembly, piston rod steel pipes of different specifications can be supported. The supporting device consists of two groups of two adjacent connecting rod handles on the same horizontal line and a plurality of arc-shaped supporting rods between the two connecting rod handles. Piston rod steel pipes of different specifications are placed on the upper part of the supporting device, and those with larger diameters are placed on the lower supporting device, while those with smaller diameters can be supported by both the upper and lower supporting devices. During transportation, the driving shaft drives the inner gear and the outer gear to rotate in the same direction, and the conveyor belt drives the piston rod steel pipe to be transported into the heating furnace through the fixed seat and the rotating shaft, thereby improving the versatility of the equipment, enabling it to handle steel pipes of different sizes, reducing the frequency of equipment replacement, ensuring the stability and uniformity of the processing process, and achieving the effect of improving product quality and consistency.

[0023] 2. Through the arc-shaped support rod and groove, the rotating gear connected to the rotating shaft will rotate during transportation, and drive the arc-shaped support rod to rotate in the same direction through the connecting rod handle, so that under the action of the arc-shaped support rod and the groove, the piston rod steel tube rotates, thereby promoting the carbonitriding layer thickness and composition on the surface of the steel tube to be more uniform, improving the overall hardness and wear resistance, and achieving the effect of improving production efficiency and product quality.

[0024] 3. Through the positioning assembly, in order to make the carbon and nitrogen gases released by the fixed gas nozzles and heating elements penetrate into the surface of the piston rod steel tube more evenly, the telescopic cylinder is operated before the piston rod steel tube enters the heating furnace. The output end of the telescopic cylinder drives the telescopic rod to move, and the piston rod steel tube is pushed onto the adjustable positioning seat through the push rod, so that the position of the piston rod steel tube is unified, which is convenient for the uniform penetration of carbon and nitrogen gas. The swing block set at the bottom of the push rod can effectively avoid the collision between the push rod and the upper support device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 It is a top view of the main structure of the present invention; Figure 3 It is a structural schematic diagram of the pipeline assembly of the present invention; Figure 4 It is a partial structural schematic diagram of the drive shaft of the present invention; Figure 5 It is a partial structural schematic diagram of the internal gear and the external gear of the present invention; Figure 6 It is a partial structural schematic diagram of the conveying component of the present invention; Figure 7 It is a partial structural schematic diagram of the rotating assembly of the present invention; Figure 8 It is a schematic diagram of the state where piston rod steel tubes of different sizes are placed above the arc-shaped support rod of the present invention; Fig. 9 It is a partial structural schematic diagram of the adjustable positioning seat of the present invention; Fig.10 It is a partial structural schematic diagram of the telescopic cylinder of the present invention; Fig.11 It is a schematic diagram of the swing block of the present invention in different states.

[0026] In the figure: 1. Base frame; 2. Heating furnace; 3. Pipeline assembly; 31. Gas supply main pipe; 32. Gas delivery pump; 33. Gas delivery main pipe; 34. Gas delivery branch pipe; 4. Carbonitriding main furnace; 5. Quenching furnace; 6. Piston rod steel pipe; 7. Conveying and rotating mechanism; 71. Servo motor; 72. Drive shaft; 73. Internal gear; 74. External gear; 75. Conveying assembly; 751. Conveyor belt; 752. Fixed seat; 753. Rotating shaft; 754. Rotating gear; 755. Connecting rod handle; 756. Arc support rod; 757. Groove; 76. Rotating assembly; 761. Fixed frame; 762. Fixed rod; 763. Lower end rack; 764. Upper end rack; 8. Positioning assembly; 81. Adjustable positioning seat; 82. Telescopic cylinder; 83. Telescopic rod; 84. Push rod; 85. Swing block. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0028] Example 1, reference Figure 1 - Figure 8 , which is the first embodiment of the present invention, provides an intelligent carbonitriding heat treatment production equipment, including a base frame 1, a heating furnace 2 fixedly installed above the base frame 1, a carbonitriding main furnace 4 and a quenching furnace 5, a pipeline assembly 3 arranged above the carbonitriding main furnace 4, a conveying rotating mechanism 7 and a positioning assembly 8 arranged above the base frame 1, and a piston rod steel pipe 6 arranged above the conveying rotating mechanism 7, the carbonitriding main furnace 4 is arranged between the heating furnace 2 and the quenching furnace 5, the conveying rotating mechanism 7 includes two driving shafts 72 rotatably connected to the inner wall of the base frame 1 and symmetrically arranged, the outer walls of the two driving shafts 72 are fixedly connected with two symmetrically arranged internal gears 73 and two external gears 74, and a conveying assembly 75 is arranged between the multiple internal gears 73 and the multiple external gears 74.

[0029] Reference Figure 6 - Figure 8 The conveying assembly 75 includes two conveying belts 751 which are transmission-connected between two inner gears 73 and two outer gears 74 on the same side. The outer walls of the two conveying belts 751 are fixedly connected with a plurality of fixed seats 752. The inner walls of the plurality of fixed seats 752 are rotationally connected with a rotating shaft 753. One end of the rotating shaft 753 away from the fixed seat 752 is fixedly connected with a rotating gear 754. The side of the rotating gear 754 away from the rotating shaft 753 is fixedly connected with a connecting rod handle 755.

[0030] Specifically, two driving shafts 72 are arranged at both ends of the base frame 1, and a complete conveying channel is formed by the internal gear 73, the external gear 74 and the conveying assembly 75, and is divided into an inner conveying channel and an outer conveying channel, so that the conveying channel is layered and can better adapt to piston rod steel pipes 6 of different specifications.

[0031] By setting up a two-layer support device, piston rod steel pipes 6 of different specifications can be supported. The support device is composed of two groups of two adjacent connecting rod handles 755 on the same horizontal line and a plurality of arc-shaped support rods 756 between the two connecting rod handles 755. Piston rod steel pipes 6 of different specifications are placed on the upper part of the support device, and the larger diameter is placed on the lower support device, and the smaller diameter can be supported by both the upper and lower support devices. During transportation, the driving shaft 72 drives the inner gear 73 and the outer gear 74 to rotate in the same direction, and the conveyor belt 751 drives the piston rod steel pipe 6 to be transported to the inside of the heating furnace 2 via the fixed seat 752 and the rotating shaft 753, thereby improving the versatility of the equipment, enabling it to process steel pipes of different sizes, reducing the frequency of equipment replacement, ensuring the stability and uniformity of the processing process, and achieving the effect of improving product quality and consistency.

[0032] Reference Figure 6 A plurality of arc-shaped support rods 756 are fixedly connected between two connecting rod handles 755 on the same horizontal line, a groove 757 is provided between two adjacent arc-shaped support rods 756 , and the piston rod steel tube 6 is provided between the arc-shaped support rods 756 connected by two adjacent connecting rod handles 755 .

[0033] By means of the arc-shaped support rod 756 and the groove 757, the rotating gear 754 connected to the rotating shaft 753 will rotate during the conveying, and drive the arc-shaped support rod 756 to rotate in the same direction through the connecting rod handle 755, so that under the action of the arc-shaped support rod 756 and the groove 757, the piston rod steel tube 6 rotates, thereby promoting the thickness and composition of the carbonitriding layer on the surface of the steel tube to be more uniform, improving the overall hardness and wear resistance, and achieving the effect of improving production efficiency and product quality.

[0034] Reference Figure 7 A rotating assembly 76 is arranged between the two conveyor belts 751 on the same side. The rotating assembly 76 includes a fixed rod 762 arranged between multiple rotating gears 754. The top of the fixed rod 762 is fixedly connected with an upper rack 764, and the bottom of the fixed rod 762 is fixedly connected with a lower rack 763. The upper rack 764 is meshed with multiple rotating gears 754 connected to the external gear 74, and the lower rack 763 is meshed with multiple rotating gears 754 connected to the internal gear 73. The fixed rod 762 is fixedly connected to a fixed frame 761 on one side close to the external gear 74, and the outer wall of the fixed frame 761 is fixedly connected to the inner wall of the base frame 1.

[0035] Specifically, the fixed rod 762 is fixedly installed on the base frame 1 through the fixed frame 761, does not contact the conveying assembly 75, and does not affect the conveying of the upper and lower conveyor belts 751. The upper rack 764 and the lower rack 763 connected to the fixed rod 762 will drive the upper and lower rotating gears 754 to move in the opposite direction.

[0036] By setting the rotating assembly 76, during the conveying, the rotating gear 754 connected to the rotating shaft 753 will rotate along the upper end rack 763 or the lower end rack 764 of the fixed rod 762, playing the role of moving and rotating.

[0037] Reference Figure 4 One of the driving shafts 72 is fixedly connected to a servo motor 71 by penetrating the base frame 1 , and the servo motor 71 is arranged outside the base frame 1 .

[0038] The servo motor 71 is provided to provide power.

[0039] Reference Figure 3 The pipeline assembly 3 includes a plurality of gas pumps 32 fixedly installed on the outside of the base frame 1, the gas inlet ends of the plurality of gas pumps 32 are connected with a gas supply main pipe 31, the gas outlet ends of the plurality of gas pumps 32 are connected with a gas supply main pipe 33, the outer wall of the gas supply main pipe 33 is connected with a plurality of gas branch pipes 34, the plurality of gas branch pipes 34 are evenly distributed above the carbonitriding main furnace 4, and are connected with the interior of the carbonitriding main furnace 4.

[0040] Specifically, the gas supply main pipe 31 is connected to an external carbon-nitrogen generator, the gas delivery pump 32 controls the capacity and output speed of the carbon-nitrogen gas, and the gas delivery branch pipe 34 can evenly deliver the carbon-nitrogen gas to the carbonitriding main furnace 4 .

[0041] Through the provided pipeline assembly 3, the carbonitriding main furnace 4 is provided with a carbon-nitrogen atmosphere uniformly by the gas supply main pipe 31 through the gas pump 32, the gas main pipe 33 and the gas branch pipe 34, so as to perform carbonitriding heat treatment on the piston rod steel pipe 6 in motion and rotation.

[0042] During use, piston rod steel pipes 6 of different specifications can be supported by a two-layer support device, which is composed of two groups of two adjacent connecting rod handles 755 on the same horizontal line and a plurality of arc-shaped support rods 756 between the two connecting rod handles 755. Piston rod steel pipes 6 of different specifications are placed on the upper part of the support device, with the larger diameter placed on the lower support device, and the smaller diameter can be supported by both the upper and lower support devices, thereby improving the versatility of the equipment, enabling it to process steel pipes of different sizes, reducing the frequency of equipment replacement, ensuring the stability and uniformity of the processing process, and achieving the effect of improving product quality and consistency. Then, the servo motor 71 is operated, and the output shaft of the servo motor 71 drives the inner gear 73 and the outer gear 74 to rotate in the same direction via the drive shaft 72, and the conveyor belt 751 drives the piston rod steel pipe via the fixed seat 752 and the rotating shaft 753 6 is transported to the inside of the heating furnace 2. During the transportation, the rotating gear 754 connected to the rotating shaft 753 will rotate along the upper rack 763 or the lower rack 764 of the fixed rod 762, and drive the two adjacent arc-shaped support rods 756 to rotate in the same direction through the connecting rod handle 755, so that under the action of the arc-shaped support rods 756 and the groove 757, the piston rod steel pipe 6 rotates, thereby promoting the carbonitriding layer thickness and composition on the surface of the steel pipe to be more uniform, improving the overall hardness and wear resistance, and achieving the effect of improving production efficiency and product quality. After being heated by the heating furnace 2, the piston rod steel pipe 6 is continuously transported to the carbonitriding main furnace 4. The carbonitriding main furnace 4 is provided with a carbonitriding atmosphere uniformly by the gas supply main pipe 31 through the gas pump 32, the gas supply main pipe 33 and the gas supply branch pipe 34, and the moving and rotating piston rod steel pipe 6 is subjected to carbonitriding heat treatment, and finally removed after quenching in the quenching furnace 5.

[0043] Example 2, reference Fig.10 - Fig.11 , which is the second embodiment of the present invention, and which is different from the first embodiment in that: Fig.10 The positioning assembly 8 includes an adjustable positioning seat 81 fixedly mounted on one side of the base frame 1, and a telescopic cylinder 82 fixedly mounted on the other side of the base frame 1. The telescopic cylinder 82 and the adjustable positioning seat 81 are symmetrically arranged on both sides of the base frame 1. A telescopic rod 83 is sleeved on the output end of the telescopic cylinder 82. A push rod 84 is fixedly connected to one end of the telescopic rod 83 close to the piston rod steel pipe 6. A plurality of swing blocks 85 are hinged at the bottom of the push rod 84.

[0044] During use, in order to make the carbon and nitrogen gas released by the fixed layout gas nozzle and heating element more uniformly penetrate into the surface of the piston rod steel tube 6, the telescopic cylinder 82 is operated before the piston rod steel tube 6 enters the heating furnace 2, and the output end of the telescopic cylinder 82 drives the telescopic rod 83 to move, and the piston rod steel tube 6 is pushed onto the adjustable positioning seat 81 through the push rod 84, so that the position of the piston rod steel tube 6 is unified, which is convenient for the uniform penetration of carbon and nitrogen gas, and the swing block 85 set at the bottom of the push rod 84 can effectively avoid the collision between the push rod 84 and the upper end support device. The rest of the structure is the same as that of Example 1.

[0045] Working principle of the present invention: During operation, piston rod steel pipes 6 of different specifications can be supported by a two-layer support device, which consists of two groups of adjacent two connecting rod handles 755 on the same horizontal line and a plurality of arc-shaped support rods 756 between the two connecting rod handles 755. Piston rod steel pipes 6 of different specifications are placed on the upper part of the support device, with those with larger diameters placed on the lower support device, and those with smaller diameters can be supported by both the upper and lower support devices, thereby improving the versatility of the equipment, enabling it to process steel pipes of different sizes, reducing the frequency of equipment replacement, ensuring the stability and uniformity of the processing process, and achieving the effect of improving product quality and consistency.

[0046] In order to make the carbon and nitrogen gases released by the fixedly arranged gas nozzles and heating elements penetrate into the surface of the piston rod steel tube 6 more evenly, the telescopic cylinder 82 is operated before the piston rod steel tube 6 enters the heating furnace 2. The output end of the telescopic cylinder 82 drives the telescopic rod 83 to move, and the piston rod steel tube 6 is pushed onto the adjustable positioning seat 81 through the push rod 84, so that the position of the piston rod steel tube 6 is unified, which is convenient for the uniform penetration of the carbon and nitrogen gas. The swing block 85 set at the bottom of the push rod 84 can effectively avoid the collision between the push rod 84 and the upper end support device.

[0047] Then, the servo motor 71 is operated, and the output shaft of the servo motor 71 drives the inner gear 73 and the outer gear 74 to rotate in the same direction via the driving shaft 72. The conveyor belt 751 then drives the piston rod steel pipe 6 to be transported to the inside of the heating furnace 2 via the fixed seat 752 and the rotating shaft 753. During the transportation, the rotating gear 754 connected to the rotating shaft 753 will rotate along the upper rack 763 or the lower rack 764 of the fixed rod 762, and drive the two adjacent arc support rods 756 to rotate in the same direction via the connecting rod handle 755. Therefore, under the action of the arc support rod 756 and the groove 757, the piston rod steel pipe 6 rotates, thereby promoting the carbonitriding layer thickness and composition on the surface of the steel pipe to be more uniform, improving the overall hardness and wear resistance, and achieving the effect of improving production efficiency and product quality.

[0048] After being heated by the heating furnace 2, the piston rod steel pipe 6 is further transported to the carbonitriding main furnace 4. The carbonitriding main furnace 4 is provided with a carbon-nitrogen atmosphere uniformly by the gas supply main pipe 31 through the gas pump 32, the gas main pipe 33 and the gas branch pipe 34, and the moving and rotating piston rod steel pipe 6 is subjected to carbonitriding heat treatment, and finally removed after quenching in the quenching furnace 5.

[0049] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. An intelligent carbonitriding heat treatment production equipment, comprising a base frame (1), a heating furnace (2) fixedly mounted above the base frame (1), a carbonitriding main furnace (4) and a quenching furnace (5), a pipeline assembly (3) arranged above the carbonitriding main furnace (4), a conveying and rotating mechanism (7) and a positioning assembly (8) arranged above the base frame (1), and a piston rod steel pipe (6) arranged above the conveying and rotating mechanism (7), wherein the carbonitriding main furnace (4) is arranged between the heating furnace (2) and the quenching furnace (5), and is characterized in that: The conveying rotating mechanism (7) comprises two driving shafts (72) rotatably connected to the inner wall of the base frame (1) and symmetrically arranged, the outer walls of the two driving shafts (72) are fixedly connected to two symmetrically arranged internal gears (73) and two external gears (74), and a conveying assembly (75) is arranged between the plurality of internal gears (73) and the plurality of external gears (74); The conveying assembly (75) comprises two conveying belts (751) which are transmission-connected between two inner gears (73) and two outer gears (74) on the same side; the outer walls of the two conveying belts (751) are fixedly connected to a plurality of fixing seats (752); the inner walls of the plurality of fixing seats (752) are rotationally connected to a rotating shaft (753); one end of the rotating shaft (753) away from the fixing seat (752) is fixedly connected to a rotating gear (754); and one side of the rotating gear (754) away from the rotating shaft (753) is fixedly connected to a connecting rod handle (755).

2. The intelligent carbonitriding heat treatment production equipment according to claim 1 is characterized in that: A plurality of arc-shaped support rods (756) are fixedly connected between two connecting rod handles (755) on the same horizontal line, a groove (757) is provided between two adjacent arc-shaped support rods (756), and the piston rod steel tube (6) is provided between the arc-shaped support rods (756) connected to the two adjacent connecting rod handles (755).

3. The intelligent carbonitriding heat treatment production equipment according to claim 2 is characterized in that: A rotating assembly (76) is arranged between the two conveyor belts (751) on the same side, and the rotating assembly (76) comprises a fixed rod (762) arranged between a plurality of rotating gears (754), an upper rack (764) is fixedly connected to the top of the fixed rod (762), and a lower rack (763) is fixedly connected to the bottom of the fixed rod (762), the upper rack (764) meshes with a plurality of rotating gears (754) connected to the outer gear (74), and the lower rack (763) meshes with a plurality of rotating gears (754) connected to the inner gear (73).

4. The intelligent carbonitriding heat treatment production equipment according to claim 3 is characterized in that: A fixing frame (761) is fixedly connected to one side of the fixing rod (762) close to the external gear (74), and an outer wall of the fixing frame (761) is fixedly connected to an inner wall of the bottom frame (1).

5. The intelligent carbonitriding heat treatment production equipment according to claim 1 is characterized in that: One of the driving shafts (72) is fixedly connected to a servo motor (71) by penetrating the base frame (1); the servo motor (71) is arranged outside the base frame (1).

6. The intelligent carbonitriding heat treatment production equipment according to claim 1 is characterized in that: The pipeline assembly (3) comprises a plurality of air delivery pumps (32) fixedly mounted on the outside of the base frame (1); the air inlet ends of the plurality of air delivery pumps (32) are connected to an air supply main pipe (31); the air outlet ends of the plurality of air delivery pumps (32) are all connected to an air delivery main pipe (33); the outer wall of the air delivery main pipe (33) is connected to a plurality of air delivery branch pipes (34); the plurality of air delivery branch pipes (34) are evenly distributed above the carbonitriding main furnace (4) and are connected to the interior of the carbonitriding main furnace (4).

7. The intelligent carbonitriding heat treatment production equipment according to claim 1 is characterized in that: The positioning assembly (8) comprises an adjustable positioning seat (81) fixedly mounted on one side of the base frame (1), and a telescopic cylinder (82) fixedly mounted on the other side of the base frame (1); the telescopic cylinder (82) and the adjustable positioning seat (81) are symmetrically arranged on both sides of the base frame (1).

8. The intelligent carbonitriding heat treatment production equipment according to claim 7 is characterized in that: The output end of the telescopic cylinder (82) is sleeved with a telescopic rod (83), one end of the telescopic rod (83) close to the piston rod steel tube (6) is fixedly connected to a push rod (84), and the bottom of the push rod (84) is hinged with a plurality of swing blocks (85).

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