Piston rod surface alloy cladding processing equipment and process thereof

Abstract

The invention relates to the field of cladding machining, and discloses piston rod surface alloy cladding machining equipment and a process thereof.The piston rod surface alloy cladding machining equipment comprises a machining table, a clamp is installed on the machining table and used for clamping a piston rod to be machined, a mechanical arm is arranged on one side of the machining table, and a cladding head is arranged at the end of the mechanical arm; powder feeding guns are arranged on the two sides of the cladding head; an electric sliding rail is arranged on the machining table, the electric sliding rail and a piston rod to be machined are arranged in parallel, a preheating mechanism is arranged on the electric sliding rail and comprises a telescopic assembly and a preheating assembly, the telescopic assembly is installed on a sliding table of the electric sliding rail, the preheating assembly is installed on the telescopic assembly, and the preheating assembly is installed on the telescopic assembly. The preheating assembly is pushed by the telescopic assembly to get close to the to-be-machined piston rod, then the electric sliding rail drives the preheating mechanism to move, the to-be-machined piston rod is preheated in advance, the solidification time of a molten pool is prolonged, and protective gas can fully escape.

Description

Technical Field

[0001] The invention relates to the field of cladding processing, and in particular to a piston rod surface alloy cladding processing equipment and a process thereof. Background Art

[0002] As a pneumatic or hydraulic moving component, the piston rod can be formed with an alloy layer with excellent wear resistance on the surface of the piston rod by laser cladding technology, thereby significantly improving the wear resistance of the piston rod and extending its service life. It can also add corrosion-resistant alloy elements to the surface of the piston rod to improve the corrosion resistance of the piston rod in harsh environments. The laser-clad alloy layer usually has high heat resistance and can maintain stable performance in high temperature environments, which is especially important for piston rods that need to work under high temperature conditions.

[0003] During the use of the piston rod, the surface may have defects such as wear and scratches. Laser cladding technology can accurately repair these defects and restore the surface flatness and precision of the piston rod; during the laser cladding process, the high energy density of the laser beam can fully fuse the cladding material with the base material to form a dense metallurgical bonding layer, thereby improving the surface quality of the piston rod.

[0004] However, the existing alloy cladding processing equipment still has some defects. For example, during use, since high-pressure shielding gas is usually used as a carrier gas to transport metal powder during laser cladding, part of the shielding gas will enter the molten pool area; if these gases fail to escape in time when the molten pool solidifies, pores will form on the surface of the cladding layer; the heat accumulation effect will aggravate this phenomenon, causing the molten pool to continue to grow and become unstable, thereby increasing the possibility of pore formation. The presence of pores will significantly reduce the density and mechanical properties of the cladding layer. Therefore, this problem needs to be solved urgently. Summary of the invention

[0005] The purpose of the present invention is to provide a piston rod surface alloy cladding processing equipment and process thereof, so as to solve the technical problem that the protective gas fails to escape in time when the molten pool solidifies, and pores are formed on the surface of the cladding layer.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A piston rod surface alloy cladding processing equipment, comprising: a processing table, a clamp is installed on the processing table, the clamp is used to clamp the piston rod to be processed, a manipulator is arranged on one side of the processing table, a cladding head is arranged at the end of the manipulator, and powder feeding guns are arranged on both sides of the cladding head;

[0008] An electric slide is arranged on the processing table, and the electric slide is arranged parallel to the piston rod to be processed. A preheating mechanism is arranged on the electric slide, and the preheating mechanism includes a telescopic component and a preheating component. The telescopic component is installed on the slide table of the electric slide, and the preheating component is installed on the telescopic component. The preheating component is first pushed toward the piston rod to be processed by the telescopic component, and then the electric slide drives the preheating mechanism to move, so as to preheat the piston rod to be processed in advance.

[0009] Furthermore, the telescopic assembly includes an electric telescopic rod, the top of which is connected to the preheating assembly, and a movable unit is provided on one side of the preheating assembly, and the movable unit is used to cause the preheating assembly to reciprocate left and right.

[0010] Furthermore, the preheating assembly includes a preheating frame with a notch on the top, the notch is for the piston rod to be processed to enter, the cross-section of the preheating frame is arranged to be a concave structure, and a matching high-frequency heating module is slidably mounted on the preheating frame, and the high-frequency heating module forms a semi-enclosed state for the piston rod to be processed.

[0011] Furthermore, the movable unit includes an incomplete gear, a No. 1 arc-shaped rack and a No. 2 arc-shaped rack. A movable groove is opened on the top of the preheating frame. The No. 1 arc-shaped rack is fixedly arranged on the bottom surface of the high-frequency heating module, and the tooth portion of the No. 1 arc-shaped rack is located at the bottom, and the tooth portion of the No. 2 arc-shaped rack is located at the top, and the No. 1 arc-shaped rack and the No. 2 arc-shaped rack are meshed with the incomplete gear for transmission in turn, and both ends of the No. 2 arc-shaped rack are fixedly connected with a connecting frame, and the top ends of the two connecting frames are fixed on the side of the high-frequency heating module. The incomplete gear is connected to the driving member in transmission, and the driving member is installed on the slide table of the electric slide rail.

[0012] Furthermore, the arc length of the bottom surface of the high-frequency heating module is greater than the arc length of the top surface of the preheating rack.

[0013] Furthermore, an airflow impact unit is also provided on the preheating rack, and the airflow impact unit is used to perform airflow impact on the high-frequency heating module.

[0014] Furthermore, the airflow impact unit includes a high-pressure air pump, which is installed on the slide table of the electric slide rail. The high-pressure air pump is connected to the air nozzle through a telescopic air pipe. The air nozzle is installed on the top surface of the preheating rack. The air nozzle is tilted and the air outlet end of the air nozzle faces the piston rod.

[0015] Furthermore, an auxiliary air nozzle is provided on one side of the air nozzle, the auxiliary air nozzle faces the top surface of the high-frequency heating module, and a control valve is provided on the auxiliary air nozzle, the control valve is electrically connected to a proximity switch, the proximity switch is provided on the outer shell of the air nozzle, and a detection body is provided on the side of the high-frequency heating module. When the detection body moves into the sensing range of the proximity switch, the proximity switch is activated to open the control valve, and the auxiliary air nozzle discharges air toward the top surface of the high-frequency heating module.

[0016] Furthermore, a pull ring is sleeved on the top area of ​​the telescopic air tube, and the pull ring is divided into a left half ring and a right half ring. Slots are opened on the two end faces of the left half ring, and the two ends of the right half ring can be inserted into the corresponding slots. Both ends of the right half ring are arranged into a T-shaped structure to achieve the purpose that the end of the right half ring can slide in the slot but cannot escape from the slot. The two ends of the right half ring are connected to a nearby connecting frame through a pull rope, and the connecting frame is reciprocated by the left and right reciprocating deflection of the high-frequency heating module to form a reciprocating pull on the right half ring. A spring is connected between the bottom wall of the slot and the end of the right half ring, and the left half ring is fixed on the preheating frame.

[0017] A piston rod surface alloy cladding processing technology comprises the following steps:

[0018] S1. Clean the surface of the piston rod to be processed, and then send it into the drying room for drying to keep the surface of the piston rod dust-free and dry during processing;

[0019] S2, put the piston rod in S1 into the fixture, and after the telescopic assembly drives the preheating assembly to half-wrap the piston rod in advance, the electric slide rail drives the telescopic assembly and the preheating assembly to move from left to right to realize the sequential preheating of the piston rod body. After the preheating is completed, the telescopic assembly drives the preheating assembly to move downward, and then the electric slide rail drives the telescopic assembly and the preheating assembly to return to the initial position;

[0020] S3. The robot drives the cladding head to move to the position of the preheated piston rod to perform cladding processing in sequence. After the processing is completed, the piston rod is sent to the grinding and polishing process.

[0021] Beneficial effects of the present invention:

[0022] (1) The present invention uses a movable preheating mechanism. On the one hand, the immediate preheating part is small, so the energy consumption is small, which plays a role in saving energy. On the other hand, the position can be changed in real time to adapt to various preheating requirements. Even when the piston rod is partially repaired, it can still be applied. In comparison, it has a wider range of applications and can shorten the interval from preheating to cladding processing, so as to maximize the preheating effect, thereby extending the solidification time of the molten pool, thereby preventing the problem of pores caused by the failure of the protective gas to escape in time.

[0023] (2) The present invention drives the incomplete gear through a driving member. The rotating incomplete gear first meshes with the tooth portion of the No. 1 arc-shaped rack, thereby driving the high-frequency heating module connected to the No. 1 arc-shaped rack to slide to one side. When it moves to a certain distance, the incomplete gear disengages from the No. 1 arc-shaped rack, thereby meshing with the No. 2 arc-shaped rack below, allowing the incomplete gear to drive the No. 2 arc-shaped rack to return and slide. Since the No. 2 arc-shaped rack is connected to the high-frequency heating module on the top through the connecting frame, the high-frequency heating module returns to its initial position under the action of the No. 2 arc-shaped rack. The incomplete gear is alternately meshed with the No. 1 arc-shaped rack and the No. 2 arc-shaped rack in turn to achieve a left and right reciprocating deflection effect, so that the high-frequency heating module under deflection fills the preheating risk caused by the original gap, further enhances the uniformity of piston rod preheating, and improves the preheating effect of the piston rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0026] Figure 2 for Figure 1 A three-dimensional schematic diagram from another angle;

[0027] Figure 3 It is a schematic diagram of the three-dimensional structure of the telescopic component in the present invention;

[0028] Figure 4 It is a schematic diagram of the structure of the air nozzle and the auxiliary air nozzle in the present invention;

[0029] Figure 5 It is a process step diagram of the present invention;

[0030] Figure 6 It is a schematic structural diagram of the pull ring in the present invention.

[0031] Description of the drawings: 1. Processing table; 2. Fixture; 3. Manipulator; 4. Cladding head; 5. Powder feeding gun; 6. Electric slide rail; 7. Preheating mechanism; 71. Telescopic assembly; 711. Electric telescopic rod; 712. Movable unit; 7121. Incomplete gear; 7122. No. 1 arc rack; 7123. No. 2 arc rack; 7124. Movable groove; 7125. Connecting frame; 7126. Driving member; 72. Preheating assembly; 721. Preheating frame; 722. High-frequency heating module; 73. Air flow impact unit; 731. High-pressure air pump; 732. Telescopic air pipe; 733. Air nozzle; 734. Auxiliary air nozzle; 735. Control valve; 736. Proximity switch; 737. Detection body; 8. Pull ring; 81. Left half ring; 82. Right half ring; 83. Slot; 84. Pull rope; 85. Spring. DETAILED DESCRIPTION

[0032] 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.

[0033] See also Figure 1-Figure 6 As shown, the present invention is a piston rod surface alloy cladding processing equipment, comprising: a processing table 1, a fixture 2 is installed on the processing table 1, the fixture 2 is used to clamp the piston rod to be processed, a manipulator 3 is arranged on one side of the processing table 1, a cladding head 4 is arranged at the end of the manipulator 3, and powder feeding guns 5 are arranged on both sides of the cladding head 4; wherein, the fixture 2 is a prior art, as long as it can realize the clamping and limiting of the piston rod, the conventional selection of those skilled in the art can be obtained, and it will not be repeated here;

[0034] The processing table 1 is provided with an electric slide rail 6, which is arranged parallel to the piston rod to be processed. The electric slide rail 6 is provided with a preheating mechanism 7, which includes a telescopic component 71 and a preheating component 72. The telescopic component 71 is installed on the slide of the electric slide rail 6, and the preheating component 72 is installed on the telescopic component 71. The preheating component 72 is first pushed toward the piston rod to be processed by the telescopic component 71, and then the electric slide rail 6 drives the preheating mechanism 7 to move, so as to preheat the piston rod to be processed in advance.

[0035] The telescopic assembly 71 includes an electric telescopic rod 711 , the top of which is connected to the preheating assembly 72 , and a movable unit 712 is provided on one side of the preheating assembly 72 , and the movable unit 712 is used to cause the preheating assembly 72 to reciprocate left and right.

[0036] The preheating assembly 72 includes a preheating frame 721 with a notch on the top, the notch is for the piston rod to be processed to enter, the cross section of the preheating frame 721 is set to a concave structure, and a matching high-frequency heating module 722 is slidably installed on the preheating frame 721, and the high-frequency heating module 722 forms a semi-enclosed state for the piston rod to be processed. In order to solve the problem in the prior art that the protective gas fails to escape in time when the molten pool solidifies, forming pores on the surface of the cladding layer, the present invention sets a preheating mechanism 7 to preheat the piston rod before the piston rod is laser clad, so as to extend the solidification time of the molten pool, so that the protective gas can escape in time and reduce the probability of pores; specifically:

[0037] Before the powder feeding gun 5 and the cladding head 4 are used to clad the piston rod surface, the preheating frame 721 is pushed upward by the electric telescopic rod 711 until the high-frequency heating module 722 on the preheating frame 721 coincides with the center of the piston rod. At this time, the preheating mechanism 7 is ready, and then the high-frequency heating module 722 is started to preheat the piston rod. During the preheating, the electric slide rail 6 drives the entire preheating mechanism 7 to move slowly on one side, thereby gradually preheating the entire rod body of the piston rod. At the same time, the cladding head 4 clads the piston rod that has just been preheated, thereby maintaining the preheating and melting The cladding processing action can achieve the maximum preheating effect. At the same time, compared with the overall preheating, the movable preheating mechanism 7, on the one hand, has a small immediate preheating part, so it consumes less energy and plays a role in saving energy. On the other hand, it can change its position in real time to adapt to various preheating needs. Even when the piston rod is partially repaired, it can still be used. Comparatively speaking, it has a wider range of applications and can shorten the interval from preheating to cladding processing, so as to maximize the preheating effect, thereby extending the solidification time of the molten pool, thereby preventing the porosity problem caused by the failure of the protective gas to escape in time.

[0038] The movable unit 712 includes an incomplete gear 7121, a first arc-shaped rack 7122 and a second arc-shaped rack 7123. A movable groove 7124 is opened at the top of the preheating frame 721. The first arc-shaped rack 7122 is fixedly arranged on the bottom surface of the high-frequency heating module 722, and the tooth portion of the first arc-shaped rack 7122 is located at the bottom, and the tooth portion of the second arc-shaped rack 7123 is located at the top. The first arc-shaped rack 7122 and the second arc-shaped rack 7123 are meshed and transmitted with the incomplete gear 7121 in turn. Both ends of the second arc-shaped rack 7123 are fixedly connected with a connecting frame 7125, and the top ends of the two connecting frames 7125 are fixed on the side of the high-frequency heating module 722. The incomplete gear 7121 is connected to the driving member 7126 in transmission, and the driving member 7126 is installed on the slide table of the electric slide rail 6.

[0039] In the present invention, although the piston rod is allowed to easily enter and exit the high-frequency heating module to improve the convenience of preheating operation, the notch portion always has the defect of no preheating. Therefore, in order to preheat the piston rod evenly, a movable unit 712 is provided. The incomplete gear 7121 is first driven by the driving member 7126. The rotating incomplete gear 7121 first meshes with the tooth portion of the first arc-shaped rack 7122, thereby driving the high-frequency heating module 722 connected to the first arc-shaped rack 7122 to slide to one side. When it moves to a certain distance, the incomplete gear 7121 disengages from the first arc-shaped rack 7122, thereby meshing with the second arc-shaped rack 7123 below, allowing the incomplete gear 7121 to drive the second arc-shaped rack 7123 to return and slide. 23 is connected with the high-frequency heating module 722 at the top through the connecting frame 7125, so under the action of the second arc-shaped rack 7123, the high-frequency heating module 722 returns to the initial position again, and the alternating meshing transmission of the incomplete gear 7121 with the first arc-shaped rack 7122 and the second arc-shaped rack 7123 in turn makes the high-frequency heating module 722 realize the effect of left and right reciprocating deflection under the alternating meshing transmission of the incomplete gear 7121, the first arc-shaped rack 7122 and the second arc-shaped rack 7123, so that the high-frequency heating module 722 under deflection fills the preheating risk caused by the original gap, further enhances the uniformity of the preheating of the piston rod, and improves the preheating effect of the piston rod; the arc length of the bottom surface of the high-frequency heating module 722 is greater than the arc length of the top surface of the preheating frame 721.

[0040] The preheating frame 721 is also provided with an airflow impact unit 73, which is used to perform airflow impact on the high-frequency heating module 722. The airflow impact unit 73 includes a high-pressure air pump 731, which is mounted on the slide of the electric slide rail 6, and the high-pressure air pump 731 is connected to an air nozzle 733 through a telescopic air pipe 732. The air nozzle 733 is mounted on the top surface of the preheating frame 721, and the air nozzle 733 is tilted, and the air outlet end of the air nozzle 733 faces the piston rod. A secondary air nozzle 734 is provided on one side of the air nozzle 733, and the secondary air nozzle 734 faces the top surface of the high-frequency heating module 722. A control valve 735 is provided on the secondary air nozzle 734, and the control valve 735 is electrically connected to a proximity switch 736. The proximity switch 736 is provided on the outer shell of the air nozzle 733. A detection body 737 is provided on the side of the high-frequency heating module 722. When the detection body 737 moves into the sensing range of the proximity switch 736, the proximity switch 736 is activated to open the control valve 735, and the secondary air nozzle 734 exhausts air to the top surface of the high-frequency heating module 722.

[0041] In order to prevent the formation of an impurity layer on the surface of the piston rod during the preheating process, the present invention requires a synchronous impact on the surface of the piston rod during preheating. The high-pressure gas discharged from the exhaust nozzle of the high-pressure air pump 731 is used to impact the surface of the piston rod. Once an impurity layer appears on the surface of the piston rod, it will be impacted and fall off by the high-pressure gas and fall on the high-frequency heating module 722. The impurity layer will automatically separate from the high-frequency heating module 722 under the action of its own left and right reciprocating deflection, and will not interfere with the subsequent preheating of the high-frequency heating module 722. In order to increase the falling speed of the impurity layer, the airflow of the auxiliary air nozzle 734 is used to impact the impurity layer when the high-frequency heating module 722 is deflected to a certain angle. The dual action ensures that the impurity layer falls as much as possible to prevent adverse effects on the subsequent high-frequency heating module 722.

[0042] A pull ring 8 is sleeved on the top area of ​​the telescopic air tube 732, and the pull ring 8 is divided into a left half ring 81 and a right half ring 82. Slots 83 are opened on the two end faces of the left half ring 81, and the two ends of the right half ring 82 can be inserted into the corresponding slots 83. Both ends of the right half ring 82 are arranged in a T-shaped structure to achieve the purpose that the end of the right half ring 82 slides in the slot 83 but cannot escape from the slot 83. The two ends of the right half ring 82 are connected to a nearby connecting frame 7125 through a pull rope 84, and the connecting frame 7125 is reciprocated by the high-frequency heating module 722 to form a reciprocating pull on the right half ring 82. A spring 85 is connected between the inner bottom wall of the slot 83 and the end of the right half ring 82, and the left half ring 81 is fixed on the preheating frame 721.

[0043] The present invention forms a periodic traction on the pull rope 84 through the process of the connecting frame 7125 reciprocatingly deflecting left and right with the high-frequency heating module 722, and utilizes the traction force of the pull rope 84 to drive the right half ring 82 to contract toward the left half ring 81, thereby squeezing the telescopic air pipe 732, so that the flow radius in the telescopic air pipe 732 is squeezed. On the one hand, it can achieve a relative reduction in the pipe diameter, increase the pressure of the gas ejection, and achieve a more efficient airflow impact effect, without the need to frequently change the power of the air pump to prevent damage to the air pump. On the other hand, it can be linked with the high-frequency heating module swinging to the upper left position, so that when the high-frequency heating module reaches the left high point, the auxiliary air nozzle 734 and the pressurized gas are opened at the same time, so as to realize the blowing away of the impurity layer under the dual action, and minimize the problem of impurity layer residue.

[0044] A piston rod surface alloy cladding processing technology comprises the following steps:

[0045] S1. Clean the surface of the piston rod to be processed, and then send it into the drying room for drying to keep the surface of the piston rod dust-free and dry during processing;

[0046] S2, put the piston rod in S1 onto the fixture 2, after the telescopic assembly 71 drives the preheating assembly 72 to half-wrap the piston rod in advance, the electric slide rail 6 drives the telescopic assembly 71 and the preheating assembly 72 to move from left to right to realize the sequential preheating of the piston rod body, after the preheating is completed, the telescopic assembly 71 drives the preheating assembly 72 to move downward, and then the electric slide rail 6 drives the telescopic assembly 71 and the preheating assembly 72 to return to the initial position;

[0047] S3, the robot 3 drives the cladding head 4 to move to the position of the preheated piston rod to perform cladding processing in sequence. After the processing is completed, the piston rod is sent to the grinding and polishing process.

[0048] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A piston rod surface alloy cladding processing equipment, comprising: A processing table (1), wherein a clamp (2) is installed on the processing table (1), and the clamp (2) is used to clamp the piston rod to be processed. A manipulator (3) is arranged on one side of the processing table (1), and a cladding head (4) is arranged at the end of the manipulator (3), and powder feeding guns (5) are arranged on both sides of the cladding head (4); The invention is characterized in that an electric slide rail (6) is arranged on the processing table (1), the electric slide rail (6) is arranged parallel to the piston rod to be processed, a preheating mechanism (7) is arranged on the electric slide rail (6), and the preheating mechanism (7) comprises a telescopic component (71) and a preheating component (72), the telescopic component (71) is installed on the slide table of the electric slide rail (6), and the preheating component (72) is installed on the telescopic component (71), the preheating component (72) is first pushed toward the piston rod to be processed by the telescopic component (71), and then the electric slide rail (6) drives the preheating mechanism (7) to move, so as to preheat the piston rod to be processed in advance.

2. The piston rod surface alloy cladding processing equipment according to claim 1, characterized in that: The telescopic component (71) comprises an electric telescopic rod (711), the top of which is connected to the preheating component (72), and a movable unit (712) is provided on one side of the preheating component (72), the movable unit (712) being used to cause the preheating component (72) to reciprocate left and right.

3. The piston rod surface alloy cladding processing equipment according to claim 2, characterized in that: The preheating assembly (72) comprises a preheating frame (721) with a notch on the top, the notch is for the piston rod to be processed to enter, the cross section of the preheating frame (721) is arranged to be a concave structure, and a matching high-frequency heating module (722) is slidably mounted on the preheating frame (721), and the high-frequency heating module (722) forms a semi-enclosed state for the piston rod to be processed.

4. The piston rod surface alloy cladding processing equipment according to claim 3, characterized in that: The movable unit (712) comprises an incomplete gear (7121), a first arc-shaped rack (7122) and a second arc-shaped rack (7123); a movable groove (7124) is provided on the top of the preheating rack (721); the first arc-shaped rack (7122) is fixedly arranged on the bottom surface of the high-frequency heating module (722); the teeth of the first arc-shaped rack (7122) are located at the bottom; the teeth of the second arc-shaped rack (7123) are located at the top; and the first arc-shaped rack (7124) is fixedly arranged on the bottom surface of the high-frequency heating module (722); The rack (7122) and the second arc-shaped rack (7123) are meshed with the incomplete gear (7121) in turn for transmission. Both ends of the second arc-shaped rack (7123) are fixedly connected with a connecting frame (7125). The top ends of the two connecting frames (7125) are fixed on the side surfaces of the high-frequency heating module (722). The incomplete gear (7121) is transmission-connected with a driving member (7126), and the driving member (7126) is mounted on the slide table of the electric slide rail (6).

5. The piston rod surface alloy cladding processing equipment according to claim 4, characterized in that: The arc length of the bottom surface of the high-frequency heating module (722) is greater than the arc length of the top surface of the preheating rack (721).

6. The piston rod surface alloy cladding processing equipment according to claim 4, characterized in that: The preheating rack (721) is also provided with an airflow impact unit (73), and the airflow impact unit (73) is used to perform airflow impact on the high-frequency heating module (722); the airflow impact unit (73) comprises a high-pressure air pump (731), and the high-pressure air pump (731) is installed on the slide table of the electric slide rail (6); the high-pressure air pump (731) is connected to the air nozzle (733) through a telescopic air pipe (732); the air nozzle (733) is installed on the top surface of the preheating rack (721), and the air nozzle (733) is inclined, and the air outlet end of the air nozzle (733) faces the piston rod.

7. The piston rod surface alloy cladding processing equipment according to claim 6, characterized in that: A secondary air nozzle (734) is provided on one side of the air nozzle (733), the secondary air nozzle (734) faces the top surface of the high-frequency heating module (722), and a control valve (735) is provided on the secondary air nozzle (734), the control valve (735) is electrically connected to a proximity switch (736), the proximity switch (736) is provided on the outer shell of the air nozzle (733), and a detection body (737) is provided on the side of the high-frequency heating module (722), when the detection body (737) moves into the sensing range of the proximity switch (736), the proximity switch (736) is activated to open the control valve (735), and the secondary air nozzle (734) discharges air toward the top surface of the high-frequency heating module (722).

8. The piston rod surface alloy cladding processing equipment according to claim 7, characterized in that: The top area of ​​the telescopic air tube (732) is sleeved with a pull ring (8), and the pull ring (8) is divided into a left half ring (81) and a right half ring (82). Slots (83) are provided on the two end faces of the left half ring (81), and the two ends of the right half ring (82) can be inserted into the corresponding slots (83). Both ends of the right half ring (82) are arranged in a T-shaped structure, so that the end of the right half ring (82) can slide in the slot (83) but cannot be separated from the slot. For the purpose of (83), the two ends of the right half ring (82) are connected to a nearby connecting frame (7125) through a pull rope (84), and the connecting frame (7125) is reciprocated by the high-frequency heating module (722) to form a reciprocating pull on the right half ring (82). A spring (85) is connected between the inner bottom wall of the slot (83) and the end of the right half ring (82), and the left half ring (81) is fixed on the preheating frame (721).

9. A piston rod surface alloy cladding processing technology, the technology is applicable to the piston rod surface alloy cladding processing equipment according to any one of claims 1 to 8, characterized in that: The steps include: S1. Clean the surface of the piston rod to be processed, and then send it into the drying room for drying to keep the surface of the piston rod dust-free and dry during processing; S2, the piston rod in S1 is placed on the fixture (2), the telescopic component (71) drives the preheating component (72) to half-wrap the piston rod in advance, and the electric slide rail (6) drives the telescopic component (71) and the preheating component (72) to move from left to right to realize sequential preheating of the piston rod body, after the preheating is completed, the telescopic component (71) drives the preheating component (72) to move downward, and then the electric slide rail (6) drives the telescopic component (71) and the preheating component (72) to return to the initial position; S3, the robot (3) drives the cladding head (4) to move to the position of the preheated piston rod to perform cladding processing in sequence. After the processing is completed, the piston rod is sent to the grinding and polishing process.

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