Machining system and machining method for spline continuous brush plating of multiple heterogeneous coatings

Abstract

The invention discloses a machining system and a machining method for continuous brush plating of a spline with multiple heterogeneous coatings. The machining system comprises a spline clamping device, an automatic liquid feeding device, a profiling machining device and a control device. The spline clamping device comprises an index plate and a rotation driving mechanism; the profiling processing device comprises a profiling plating pen and a three-axis driving mechanism; the automatic liquid feeding device is used for conveying the activating liquid and the plating liquid to the tooth surfaces of the spline teeth of the spline and collecting the redundant plating liquid for cyclic utilization; the control device is used for controlling the rotation angle and the rotation time of the index plate and controlling the movement route, the speed and the time of the profiling plating pen so that the profiling plating pen can make relative friction movement in the axis direction of the spline, and electroplating brush machining of all spline teeth of the spline can be completed. According to the processing system, the surface quality of an electro-deposition coating can be improved, and the plating solution can be automatically replaced and recycled, so that the utilization rate of the solution for brush plating is improved, and waste is avoided.

Description

Technical Field

[0001] The invention belongs to the field of brush plating, and in particular relates to a processing system and a processing method for spline continuous brush plating of multi-layer heterogeneous coatings. Background Art

[0002] Surface coating technology is one of the important surface treatment methods to improve the performance and service life of splines. By coating the splines, the splines can obtain better wear resistance, surface hardness and corrosion resistance, thereby meeting the needs of various complex working conditions. When designing the coating for carburized 9310 steel splines, it was found that if only a single layer of coating was used, the coating would easily crack and fall off due to abnormal loads under complex working conditions such as alternating loads and large stress concentrations, resulting in spline connection failure, and thus failing to effectively protect the substrate itself. After using the first principle calculation method based on density functional theory and multiple experiments, a wear-reducing nickel-based nanoparticle composite coating system with better toughness and brush plating on the surface of carburized 9310 steel was selected. The coating system consists of special nickel, bright copper, bright nickel and nanoparticle nickel-based composite coatings from the layer closest to the substrate.

[0003] Brush plating is a common surface treatment and repair process for metal materials. It is one of the technologies for coating and repairing the spline surface. Its principle is to use an electrochemical method to use a plating pen soaked in plating solution as the anode to discharge and crystallize metal ions on the surface of the negative electrode (the plated spline) to form a metal coating. The plating pen is an insoluble anode, and the plating solution is a metal salt aqueous solution of an organic complex. During brush plating, the plating pen contacts the surface of the spline to be plated and moves continuously.

[0004] However, based on the prior art, the coating system can only be brush-plated on the spline by the traditional manual brush-plating method. Due to the inability to control the stability of the plating solution flow rate, the same contact area between the plating pen and the tooth surface each time, and other uncontrollable human factors, the thickness of the brush-plated coating may be uneven, the internal stress may increase, and the coating may have bubbles, wrinkles, cracks, and even peeling, which reduces the service life of the coating. In addition, the manual brush-plating spline also has the problems of low efficiency, high labor intensity, and waste of plating solution. In addition, the invention patent application with application publication number CN104032340A discloses a "metal parts brush plating system", which includes a motion control device and a plating tank. The motion control device provided on the bracket is equipped with a plating pen, and the plating pen includes an anode component, and the anode component is provided with an anode plate and bristles. The plated piece is placed in the plating tank, and the bristles arranged toward the plated surface of the plated piece are controlled by the motion control device. The plated surface of the plated piece and the plated surface of the plated piece are subjected to relative friction movement. During the relative friction movement, the plated surface of the plated piece is relative to the anode plate of the anode component. The method includes the following steps: installing the plating pen and the plated part; electrocleaning; strong activation; weak activation; and brush plating. However, the above device can only be used for brush plating outer circle, inner hole and plane parts, and cannot be used for brush plating splines with complex surface shapes.

[0005] The coating system used in brush plating is a multi-layer heterogeneous coating. In addition to two activation solutions, four different plating solutions are required for brush plating. If the plating solution is changed manually every time, the efficiency of brush plating will be reduced. The brush plating time of the bright nickel and nanoparticle nickel-based composite coating in the coating system used in brush plating is as long as half an hour. If it is not recycled, it will cause a certain degree of waste of plating solution.

[0006] In addition, the invention patent application with application publication number CN201610038252 discloses "automated brush plating equipment", in which the plating solution supply and recovery system can replace the plating solution and recycle it, but has the following disadvantages: First, the structure is complex and the control of the system is cumbersome; Second, the recovered plating solution may be contaminated during the brush plating process or when flowing through the separator block and the recovery separator box, thereby affecting the quality of the coating. Summary of the invention

[0007] In order to overcome the shortcomings of the prior art, the present invention provides a processing system for spline continuous brush plating of multi-layer heterogeneous coatings. The processing system can realize high automation of continuous brush plating of multi-layer heterogeneous coatings, simplify operation, avoid uncontrollable human factors that may affect the quality of the coating, avoid the generation of bubbles, wrinkles, cracks, peeling and the like on the coating, thereby improving the surface quality of the electrodeposited coating, and at the same time realize automatic replacement of the plating solution and recycling, so as to improve the utilization rate of the solution used for brush plating and avoid waste.

[0008] The second object of the present invention is to provide a processing method for an automatic liquid feeding system for the above-mentioned spline continuous brush plating of multi-layer heterogeneous coatings.

[0009] The technical solution of the present invention to solve the above technical problems is:

[0010] A processing system for continuous brush plating of multi-layer heterogeneous coatings on a spline, comprising a spline clamping device for clamping a spline to be processed, an automatic liquid feeding device for conveying an activation liquid and a plating liquid to the key teeth of the spline, a profiling processing device for brush plating the key teeth of the spline, and a control device, wherein:

[0011] The spline clamping device comprises a dividing plate and a rotation driving mechanism for driving the dividing plate to rotate; wherein the spline to be processed is mounted on the dividing plate;

[0012] The profiling processing device comprises a profiling plating pen and a three-axis driving mechanism for driving the profiling plating pen to move along the X-axis, the Y-axis and the Z-axis;

[0013] When brush plating the activation solution, the spline is connected to the positive electrode of the DC power supply as an anode; the profiling plating pen is connected to the negative electrode of the DC power supply as a cathode; when brush plating the plating solution, the spline is connected to the negative electrode of the DC power supply as a cathode; the profiling plating pen is connected to the positive electrode of the DC power supply as an anode;

[0014] The automatic liquid feeding device is used to deliver the activation liquid and the plating liquid to the tooth surface of the spline, and collect the excess activation liquid and the plating liquid for recycling;

[0015] The control device is used to control the rotation angle and rotation time of the dividing plate, as well as the movement route, speed and time of the profiling plating pen, so as to cause the profiling plating pen to perform relative friction movement along the axial direction of the spline to complete the electroplating brush processing of all the key teeth of the spline.

[0016] Preferably, the three-axis driving mechanism includes a Z-axis driving mechanism for driving the contour plating pen to move along the Z-axis direction, a Y-axis driving mechanism for driving the Z-axis driving mechanism to move along the Y-axis direction, and an X-axis driving mechanism for driving the Y-axis driving mechanism to move along the X-axis direction, wherein the contour plating pen is installed on the driving end of the Z-axis driving mechanism.

[0017] Preferably, a clamp is provided between the profiling plating pen and the driving end of the Z-axis driving mechanism, and the clamp is rotatably connected to the driving end of the Z-axis driving mechanism via a rotating shaft, and the axial direction of the rotating shaft is parallel to the X-axis direction; the profiling plating pen is installed on the clamp.

[0018] Preferably, a processing groove is provided on the contour plating pen, the shape of the processing groove is the same as the shape of the key teeth of the spline to be processed, and can cover the tooth top surface of the key teeth and the tooth side surfaces on both sides thereof.

[0019] Preferably, the automatic liquid feeding device includes a water tank, a plating liquid tank, an activation liquid tank, a hydraulic pump, a collecting valve, a funnel, a liquid filter, a liquid diverter valve and a waste liquid tank, wherein the plating liquid tank, the activation liquid tank and the hydraulic pump are multiple; the inlets of the multiple hydraulic pumps are respectively connected to the water tank, the activation liquid tank and the plating liquid tank, and the outlets are respectively connected to the respective inlets of the collecting valve; the outlet of the collecting valve is connected to the top of the plated tooth surface in the spline through a pipeline; the funnel is located below the plated tooth surface in the spline, and the liquid outlet of the funnel is connected to the inlet of the liquid filter; the outlet of the liquid filter is connected to the inlet of the diverter valve; the outlet of the diverter valve is respectively connected to each brush plating solution tank and the waste liquid tank; the control device can control the switching of the hydraulic pump and the diverter valve at specific times and the outlet flow rate of the collecting valve.

[0020] Preferably, it further comprises an ultrasonic vibrator, and the ultrasonic vibrator is connected to the plating liquid tank.

[0021] A method for processing a spline continuous brush plating multi-layer heterogeneous coating comprises the following steps:

[0022] Step S1: Install the spline to be processed on the indexing plate;

[0023] Step S2: the control device controls the indexing plate to rotate so that the tooth top surface of the first key tooth of the spline installed in the indexing plate is parallel to the ground; the automatic liquid feeding device feeds the activation liquid to the tooth surface of the first key tooth of the spline;

[0024] Step S3: the three-axis driving device drives the profiling plating pen to perform horizontal reciprocating linear motion along the axis direction of the spline to activate the tooth top surface of the first key tooth of the spline and the tooth side surfaces on both sides thereof. When the preset time is reached, the three-axis driving device drives the profiling plating pen to rise, so that the profiling plating pen is separated from the spline;

[0025] Step S4: The control device controls the indexing plate to rotate Wherein, z is the number of teeth; the top surface of the next key tooth is made to face the profiling plating pen, and the three-axis driving device drives the profiling plating pen to descend, and the profiling plating pen repeats the action of step S3 to activate the second key tooth of the spline until all the key teeth on the spline are activated;

[0026] Step S5: the control device controls the indexing plate to rotate, so that the tooth top surface of the first key tooth of the spline installed in the indexing plate moves to the processing station again; the automatic liquid feeding device feeds the first plating solution to the tooth surface of the first key tooth of the spline; then repeats steps S3 and S4, so that the first layer of plating of all the key teeth in the spline is brush-plated;

[0027] Step S6: Repeat step S5 to complete the brush plating of all coating layers of all the key teeth in the spline.

[0028] Preferably, during the brush plating process, the automatic liquid feeding device collects excess brush plating solution, filters it and reuses it.

[0029] Preferably, in step S1, before using the contour plating pen, it is necessary to wrap the contour plating pen with a layer of absorbent cotton of a preset thickness, and then wrap the outermost layer with a polyester cotton cover or an artificial wool cover, and all the contour plating pens should be wrapped with the wrapping material before using the first contour plating pen; the contour plating pen should be soaked with the activation liquid or the plating liquid before starting to move.

[0030] Preferably, before activation, the spline needs to be ultrasonically cleaned to remove impurities on the surface of the key teeth; before brush plating, insulating tape is used to stick to the two end surfaces of the spline.

[0031] A processing system and method for continuous brush plating of multi-layer heterogeneous coatings on splines, which is not limited to carburized 9310 steel splines and brush-plated nickel-based composite coatings, but also includes splines of various other steel types such as medium carbon steel, alloy steel, stainless steel, etc., brush-plated chromium-based, cobalt-based, copper-based and other coatings, and is not limited to spline-shaped workpieces.

[0032] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0033] 1. The driving accuracy of the three-axis driving device in the processing system of the spline continuous brush plating multi-layer heterogeneous coating of the present invention is as high as millimeter level, which can accurately control the moving distance of the profiling plating pen and indirectly control the force between the profiling plating pen and the spline to be within a reasonable range, thereby making the coating more dense, thereby improving the bonding force between the substrate and the coating, so as to improve the brush plating quality.

[0034] 2. The plating pen in the processing system of the spline continuous brush plating multi-layer heterogeneous coating of the present invention can adopt a contoured graphite electrode plating pen, which can match the shape of the electrode with the tooth surface of the spline to the greatest extent, making the tooth surface coating distribution more uniform, thereby improving the quality of the coating; at the same time, the limiting current density is increased, which can increase the plating speed.

[0035] 3. The processing system of the spline continuous brush plating multi-layer heterogeneous coating of the present invention adopts an automatic liquid feeding device, and utilizes a diverter and collector valve to deal with the brush plating of heterogeneous coatings using different brush plating solutions, thereby avoiding the problem of mixed contamination between different brush plating solutions, and has a simple structure and simple operation, and realizes the automatic liquid feeding of different brush plating solutions at a specific time and a set flow rate, thereby improving the efficiency of brush plating multi-layer heterogeneous coatings; at the same time, the brush plating solution is recycled to save the brush plating solution to the greatest extent, thereby improving the utilization rate of the brush plating solution; in addition, the provision of the liquid filter ensures that the recycled brush plating solution is not contaminated, ensures the purity of the brush plating solution, and guarantees the quality of the coating; in addition, the ultrasonic vibrator is in contact with the plating solution, which can maintain the dispersion of the plating solution, thereby preventing the plating solution from precipitating and affecting the coating quality.

[0036] 4. The processing system for continuous brush plating of multi-layer heterogeneous coatings on splines of the present invention realizes a high degree of automation of the spline brush plating process, avoids uncontrollable human factors that may affect the quality of the coating, improves the stability of the spline brush plating process, avoids the generation of bubbles, wrinkles, cracks, peeling and the like on the spline coating, improves the surface quality of the spline coating and the service life of the spline, reduces the labor intensity of brush plating splines, and improves the efficiency of brush plating.

[0037] 5. The processing system of spline continuous brush plating multi-layer heterogeneous coating of the present invention can realize the rotation of the plated workpiece and the arbitrary linear or broken line movement of the contour plating pen within a given time in three-dimensional space through numerical control programming. It has a high degree of freedom. In addition to splines, other more complex workpieces can also be brush plated, which simplifies the operation and method of brush plating of complex workpieces and has universal applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 The present invention is a simplified structural diagram of a processing system for continuously brush-plating multi-layer heterogeneous coatings on splines.

[0039] Figure 2 It is a structural schematic diagram of a profile-plated pen.

[0040] Figure 3 Schematic diagram of brush plating internal splines.

[0041] Figure 4 This is the schematic diagram of the automatic liquid feeding device. DETAILED DESCRIPTION

[0042] The present invention is further described in detail below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0043] See also Figure 1-Figure 4The processing device for continuous brush plating of multi-layer heterogeneous coatings on splines of the present invention comprises a spline clamping device for clamping the spline to be processed, an automatic liquid feeding device for conveying activation liquid and brush plating solution to the key teeth 10 of the spline, a profiling processing device for brush plating the key teeth 10 of the spline, and a control device, wherein:

[0044] The spline clamping device comprises a dividing plate 5 and a rotation driving mechanism (the rotation driving mechanism may be a rotary motor) for driving the dividing plate 5 to rotate; wherein the spline to be processed is mounted on the dividing plate 5;

[0045] The profiling processing device includes a profiling plating pen 6 and a three-axis driving mechanism for driving the profiling plating pen 6 to move along the X-axis, the Y-axis and the Z-axis;

[0046] When brush plating the activation solution, the spline is connected to the positive electrode of the DC power supply 4 as an anode; the profiling plating pen 6 is connected to the negative electrode of the DC power supply 4 as a cathode; when brush plating the plating solution, the spline is connected to the negative electrode of the DC power supply 4 as a cathode; the profiling plating pen 6 is connected to the positive electrode of the DC power supply 4 as an anode;

[0047] The automatic liquid feeding device is used to deliver the activation liquid and the plating liquid to the tooth surface of the spline, and collect the excess activation liquid and the plating liquid for recycling;

[0048] The control device is used to control the rotation angle and rotation time of the dividing plate 5, as well as the movement route, speed and time of the profiling plating pen 6, so as to prompt the profiling plating pen 6 to perform relative friction movement along the axial direction of the spline to complete the electroplating brush processing of all the key teeth 10 of the spline.

[0049] See also Figure 1-Figure 4 The three-axis driving mechanism includes a Z-axis driving mechanism 1 for driving the profiling plating pen 6 to move along the Z-axis direction, a Y-axis driving mechanism 3 for driving the Z-axis driving mechanism 1 to move along the Y-axis direction, and an X-axis driving mechanism 2 for driving the Y-axis driving mechanism 3 to move along the X-axis direction, wherein the profiling plating pen 6 is installed on the driving end of the Z-axis driving mechanism 1, wherein a clamp 7 is arranged between the profiling plating pen 6 and the driving end of the Z-axis driving mechanism 1, and the clamp 7 is rotatably connected to the driving end of the Z-axis driving mechanism 1 through a rotating shaft, and the axial direction of the rotating shaft is parallel to the X-axis direction; the profiling plating pen 6 is installed on the clamp 7; by setting the rotating shaft, the clamp 7 and the profiling plating pen 6 installed on the clamp 7 can be caused to rotate around the X-axis.

[0050] In this embodiment, the X-axis driving mechanism 2, the Y-axis driving mechanism 3 and the Z-axis driving mechanism 1 may adopt existing devices, such as electric cylinders or pneumatic cylinders, or electric push rods.

[0051] See also Figure 1-Figure 4 , the shaft diameter part of the spline is clamped by the indexing plate 5 to realize the positioning of the spline, and the spline can be controlled by the control device or manually controlled to rotate around the shaft diameter at any angle; specifically, before brush plating, the indexing plate 5 is adjusted by the control device or manually adjusted to make the tooth top surface of the first key tooth 10 of the spline parallel to the ground, and the brush plating program is numerically programmed by the control device, and the rotation angle of the indexing plate 5 is set, so that the spline automatically rotates after each key tooth 10 is brush-plated. This causes the tooth top surface of the next key tooth 10 to be opposite to the contour plating pen 6 so that the next key tooth 10 can be brush plated. In this embodiment, the number of teeth to be plated is 21, so the dividing plate 5 should be set to rotate at an angle of 17.14° after brush plating of each key tooth 10 is completed.

[0052] See also Figure 2 The graphite electrode 601 on the profiling plating pen 6 is provided with a processing groove, the shape of the processing groove is the same as the shape of the key tooth 10 of the spline to be processed, and can cover the tooth top surface of the key tooth 10 and the tooth side surfaces on both sides thereof;

[0053] In this embodiment, the profiling plating pen 6 is designed according to the shape and size of the spline tooth 10. The profiling part is on the side end of the graphite electrode 601 of the profiling plating pen 6, which can cover one tooth top surface and the tooth side surfaces on both sides of the spline tooth 10, and the meshing clearance with the spline should be 2mm-5mm, which is the thickness of the electrode wrapping layer; in practice, the length of the graphite electrode 601 along the pen handle direction should be greater than the width of the spline tooth 10, so that when the profiling plating pen 6 makes horizontal reciprocating linear motion along the spline shaft diameter relative to the plated tooth surface, the plated tooth surface can always be opposite to a part of the graphite electrode 601, so as to ensure the relative uniformity of the electrodeposition current density, thereby ensuring the brush plating quality of the plated spline.

[0054] like Figure 3 As shown, the length of the profiling plating pen 6 in the direction perpendicular to the ground should be smaller than the top circle diameter of the internal spline 9 to be plated, and sufficient height space should be left for lifting the profiling plating pen 6 after each spline 10 is brush-plated. If the size of the spline to be plated is too small, it will make it difficult to profile the graphite electrode 601. In this case, a profiling titanium sheet can be used instead of the graphite electrode 601.

[0055] In this embodiment, the number of the profiling plating pens 6 should be the same as the number of types of brush plating solutions. Different brush plating solutions use different profiling plating pens 6. Before using the profiling plating pen 6, it is necessary to wrap the profiling plating pen 6 with a layer of absorbent cotton of appropriate thickness, and then wrap it with a polyester cotton cover or an artificial wool cover on the outermost layer. All the profiling plating pens 6 should be wrapped with wrapping materials before using the first profiling plating pen 6. The profiling plating pen 6 can be replaced in time when the next step of brush plating is carried out. The profiling plating pen 6 should be soaked with the brush plating solution before starting to move. In this embodiment, 4 profiling plating pens 6 should be prepared, which are used for No. 1 activation solution, No. 2 activation solution, bright copper solution and other nickel metal solutions respectively.

[0056] In practice, the control device can control the dividing plate 5 through CNC programming to rotate the spline around the shaft diameter to any angle, edit the brush plating route and speed of the contour plating pen 6 through CNC programming, and accurately control the brush plating time by editing the route, speed and number of cycles, so that the contour plating pen 6 can perform any straight line or broken line motion at any speed in three-dimensional space within the set time, thereby realizing high-precision automatic brush plating of the spline.

[0057] In the brush plating of special nickel plating, in order to obtain a good quality plating layer, the total brush plating time is 1 minute, the brush plating speed is 150mm / s, so the total distance of the plating pen movement is s=150×60=9000 (mm), the brush plating route is a horizontal reciprocating linear motion, because the spline tooth 10 is 40mm wide, the length of the profiling electrode along the pen handle is designed to be 60mm, in order to ensure that the profiling electrode can always cover the entire key tooth 10 when the profiling plating pen 6 is horizontally reciprocating, the one-way one-way motion distance of the profiling plating pen 6 is set to 10mm, and the single round-trip motion distance is 20mm, so the number of cycles is n=9000 / 20=450 times; in practice, the motion path of the profiling plating pen 6 can also be programmed in the computer software, and then the edited program is imported into the control device with a U disk.

[0058] Specifically, the automatic brush plating process is as follows: the program is started, and the profiling plating pen 6 performs horizontal reciprocating linear motion on the tooth top surface and the tooth side surfaces on both sides of one of the spline teeth 10 along the axial direction. When the brush plating time of the spline tooth 10 is reached, the profiling plating pen 6 rises, and the indexing plate 5 rotates. The tooth top surface of the next key tooth 10 is made to face the profiling plating pen 6, and then the profiling plating pen 6 is lowered, and the profiling plating pen 6 repeats the above action to brush plate the next key tooth 10, until the brush plating of the last key tooth 10 is completed, and the program ends; wherein, when the plated spline is an external spline 8, the key tooth 10 being brush plated should be located at the top of the spline, that is, Figure 1 When the plated spline is an internal spline 9, the key tooth 10 being brush plated should be located at the bottom of the spline, as shown in Figure 3When each key tooth 10 is brush-plated in the setting procedure and the profiling plating pen 6 is lifted, the profiling plating pen 6 should be avoided from contacting the other tooth surfaces of the inner spline to avoid bumping and damaging the spline.

[0059] In practice, the activation time is generally 30-50 seconds. If each key tooth 10 is continuously brush plated for 30-50 seconds before the next key tooth 10 is brush plated, the key tooth 10 brush plated first may have been oxidized or unable to maintain the activation state after all the key teeth 10 are brush plated. Therefore, during the activation process, the continuous brush plating time of a single key tooth 10 should be reduced and the number of brush plating times of each key tooth 10 should be increased according to the number of teeth. In this embodiment, two activation solutions are preferably used, each activation solution is activated for 15 seconds, and the total activation time is 30 seconds. It is found through experiments that after activation, The substrate surface remains active and non-oxidized for about 1 minute. Since the number of teeth is 21, the single brush plating time for each key tooth 10 is set to 2.5 seconds. The spline needs to rotate n=30 / 2.5=12 circles, and each key tooth 10 is brush plated 12 times to ensure the total activation time. The continuous brush plating time of each key tooth 10 in the brush plating after activation should be consistent with the activation setting to ensure that each key tooth 10 is brush-plated with the coating in the activated state. When each key tooth 10 is covered with the coating, the continuous brush plating time of a single key tooth 10 can be extended.

[0060] In addition, ultrasonic cleaning of the plated spline before activation can remove impurities on the surface of the plated tooth surface, which can improve the bonding strength between the plating layer and the plated tooth surface and improve the quality of the plating layer. In addition, insulating tape is used to stick to the two end faces of the spline before brush plating to prevent a small amount of plating from being deposited on the end faces.

[0061] See also Figure 4 The automatic liquid feeding device includes a water tank, a plating liquid tank, an activation liquid tank, a hydraulic pump, a collecting valve, a funnel, a liquid filter, a liquid dividing valve, an ultrasonic vibrator and a waste liquid tank, wherein the plating liquid tank, the activation liquid tank and the hydraulic pump are multiple; the inlets of the multiple hydraulic pumps are respectively connected to the water tank, the activation liquid tank and the plating liquid tank, and the outlets are respectively connected to the respective inlets of the collecting valve; the outlet of the collecting valve is connected to the top of the plated tooth surface in the spline through a pipeline; the funnel is located below the plated tooth surface in the spline, and the liquid outlet of the funnel is connected to the inlet of the liquid filter; the outlet of the liquid filter is connected to the inlet of the diverter valve; the outlet of the diverter valve is respectively connected to each brush plating solution tank and the waste liquid tank; the ultrasonic vibrator is connected to the plating liquid tank; the control device can control the switching of the hydraulic pump and the diverter valve at a specific time and the outlet flow rate of the collecting valve.

[0062] During operation, the hydraulic pump corresponding to the selected brush plating solution (including activation solution and plating solution) is turned on, and the brush plating solution passes through the corresponding inlet of the collecting valve, flows out from the outlet of the collecting valve at a flow rate set by the control device and falls on the plated tooth surface, and the brush plating solution falling from the plated spline flows through the funnel, the liquid filter and the inlet of the diverter valve. If the brush plating solution needs to be recycled, it flows back to the brush plating solution tank from the outlet of the diverter valve connected to the brush plating solution tank, otherwise it flows to the waste liquid tank from the outlet of the diverter valve connected to the waste liquid tank; since the activation time of each activation solution is only about 5 minutes, the activation solution can be directly discharged to the waste liquid tank without recycling; the outlet of the diverter valve is set to 5, which are respectively connected to four brush plating solution tanks and one waste liquid tank; before changing different brush plating solutions, the components and pipelines from the collecting valve to the diverter valve need to be cleaned with clean water at a larger flow rate, and the cleaned waste water is passed to the waste liquid tank to ensure that the recycled brush plating solution is not contaminated.

[0063] Experiments have shown that the following are preferred processing parameters for different brush plating solutions when using the spline continuous brush plating multi-layer heterogeneous coating processing method of the present invention in this embodiment:

[0064]

[0065] See also Figure 1-Figure 4 The processing method of spline continuous brush plating multi-layer heterogeneous coating of the present invention comprises the following steps:

[0066] Step S1: Install the spline to be processed on the indexing plate 5;

[0067] Step S2: The control device controls the indexing plate 5 to rotate so that the tooth top surface of the first key tooth 10 of the spline installed in the indexing plate 5 is parallel to the ground; the automatic liquid feeding device feeds the activation liquid to the tooth surface of the first key tooth 10 of the spline;

[0068] Step S3: the three-axis driving device drives the profiling plating pen 6 to make horizontal reciprocating linear motion along the axial direction of the spline to realize brush plating on the tooth top surface and the tooth side surfaces on both sides of the first key tooth 10 of the spline. When the preset time is reached, the three-axis driving device drives the profiling plating pen 6 to rise, so that the profiling plating pen 6 is separated from the spline;

[0069] Step S4: the control device controls the indexing plate 5 to rotate (360°) / Z, where z is the number of teeth; the tooth top surface of the next key tooth 10 is opposite to the profiling plating pen 6, and the three-axis driving device drives the profiling plating pen 6 to descend, and the profiling plating pen 6 repeats the action of step S3 to activate the second key tooth 10 of the spline until all the key teeth 10 on the spline are activated;

[0070] Step S5: the control device controls the indexing plate 5 to rotate, so that the tooth top surface of the first key tooth 10 of the spline installed in the indexing plate 5 moves to the processing station again; the automatic liquid feeding device feeds the first brush plating solution to the tooth surface of the first key tooth 10 of the spline; then repeats steps S3 and S4, so that the first layer of brush plating of all the key teeth 10 in the spline is completed;

[0071] Step S6: Repeat step S5 to complete the brush plating of all coating layers of all the key teeth 10 in the spline.

[0072] Finally, the processing device and method for continuous brush plating of multi-layer heterogeneous coatings on splines of the present invention are not limited to the splines of carburized 9310 steel and brush-plated nickel-based composite coatings, but also include splines of various other types of steel such as medium carbon steel, alloy steel, stainless steel, etc., brush-plated chromium-based, cobalt-based, copper-based and other coatings, and are not limited to spline-shaped workpieces.

[0073] The above is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited to the above content. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A processing system for spline continuous brush plating of multi-layer heterogeneous coatings, characterized in that: The invention comprises a spline clamping device for clamping the spline to be processed, an automatic liquid feeding device for conveying activation liquid and plating liquid to the key teeth of the spline, a profiling device for brush plating the key teeth of the spline, and a control device, wherein: The spline clamping device comprises a dividing plate and a rotation driving mechanism for driving the dividing plate to rotate; wherein the spline to be processed is mounted on the dividing plate; The profiling processing device comprises a profiling plating pen and a three-axis driving mechanism for driving the profiling plating pen to move along the X-axis, the Y-axis and the Z-axis; When brush plating the activation solution, the spline is connected to the positive electrode of the DC power supply as an anode; the profiling plating pen is connected to the negative electrode of the DC power supply as a cathode; when brush plating the plating solution, the spline is connected to the negative electrode of the DC power supply as a cathode; the profiling plating pen is connected to the positive electrode of the DC power supply as an anode; The automatic liquid feeding device is used to deliver the activation liquid and the plating liquid to the tooth surface of the spline, and collect the excess activation liquid and the plating liquid for recycling; The control device is used to control the rotation angle and rotation time of the dividing plate, as well as the movement route, speed and time of the profiling plating pen, so as to cause the profiling plating pen to perform relative friction movement along the axial direction of the spline to complete the electroplating brush processing of all the key teeth of the spline.

2. The processing system for continuous brush plating of multi-layer heterogeneous coatings on splines according to claim 1 is characterized in that: The three-axis driving mechanism includes a Z-axis driving mechanism for driving the contour plating pen to move along the Z-axis direction, a Y-axis driving mechanism for driving the Z-axis driving mechanism to move along the Y-axis direction, and an X-axis driving mechanism for driving the Y-axis driving mechanism to move along the X-axis direction, wherein the contour plating pen is installed on the driving end of the Z-axis driving mechanism.

3. The processing system for continuous brush plating of multi-layer heterogeneous coatings on splines according to claim 2 is characterized in that: A clamp is provided between the profiling plating pen and the driving end of the Z-axis driving mechanism. The clamp is rotatably connected to the driving end of the Z-axis driving mechanism via a rotating shaft, and the axial direction of the rotating shaft is parallel to the X-axis direction; the profiling plating pen is installed on the clamp.

4. The processing system for continuous brush plating of multi-layer heterogeneous coatings on splines according to claim 1 is characterized in that: The profiling plating pen is provided with a processing groove, the shape of which is the same as the shape of the key teeth of the spline to be processed, and can cover the tooth top surface of the key teeth and the tooth side surfaces on both sides thereof.

5. The processing system for continuous brush plating of multi-layer heterogeneous coatings on splines according to claim 1 is characterized in that: The automatic liquid feeding device includes a water tank, a plating liquid tank, an activation liquid tank, a hydraulic pump, a collecting valve, a funnel, a liquid filter, a liquid diverter valve and a waste liquid tank, wherein the plating liquid tank, the activation liquid tank and the hydraulic pump are multiple; the inlets of the multiple hydraulic pumps are respectively connected to the water tank, the activation liquid tank and the plating liquid tank, and the outlets are respectively connected to the respective inlets of the collecting valve; the outlet of the collecting valve is connected to the top of the plated tooth surface in the spline through a pipeline; the funnel is located below the plated tooth surface in the spline, and the liquid outlet of the funnel is connected to the inlet of the liquid filter; the outlet of the liquid filter is connected to the inlet of the diverter valve; the outlet of the diverter valve is respectively connected to the respective brush plating solution tanks and the waste liquid tank; the control device can control the switching of the hydraulic pump and the diverter valve at specific times and the outlet flow rate of the collecting valve.

6. The processing system for continuous brush plating of multi-layer heterogeneous coatings on splines according to claim 5, characterized in that: It also includes an ultrasonic vibrator, which is connected to the plating liquid tank.

7. A processing method for a processing system for continuous brush plating of multi-layer heterogeneous coatings on splines according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step S1: Install the spline to be processed on the indexing plate; Step S2: the control device controls the indexing plate to rotate so that the tooth top surface of the first key tooth of the spline installed in the indexing plate is parallel to the ground; the automatic liquid feeding device feeds the activation liquid to the tooth surface of the first key tooth of the spline; Step S3: the three-axis driving device drives the profiling plating pen to perform horizontal reciprocating linear motion along the axis direction of the spline to activate the tooth top surface of the first key tooth of the spline and the tooth side surfaces on both sides thereof. When the preset time is reached, the three-axis driving device drives the profiling plating pen to rise, so that the profiling plating pen is separated from the spline; Step S4: The control device controls the indexing plate to rotate Wherein, z is the number of teeth; the top surface of the next key tooth is made to face the profiling plating pen, and the three-axis driving device drives the profiling plating pen to descend, and the profiling plating pen repeats the action of step S3 to activate the second key tooth of the spline until all the key teeth on the spline are activated; Step S5: the control device controls the indexing plate to rotate, so that the tooth top surface of the first key tooth of the spline installed in the indexing plate moves to the processing station again; the automatic liquid feeding device feeds the first plating solution to the tooth surface of the first key tooth of the spline; then repeats steps S3 and S4, so that the first layer of plating of all the key teeth in the spline is brush-plated; Step S6: Repeat step S5 to complete the brush plating of all coating layers of all the key teeth in the spline.

8. The method for processing a spline continuous brush plating multi-layer heterogeneous coating according to claim 7, characterized in that: During the brush plating process, the automatic liquid feeding device collects the excess brush plating solution, filters it and reuses it.

9. The method for processing a spline continuous brush plating multi-layer heterogeneous coating according to claim 8, characterized in that: In step S1, before using the profiling plating pen, it is necessary to wrap the profiling plating pen with a layer of absorbent cotton of a preset thickness, and then wrap it with a polyester cotton cover or an artificial wool cover on the outermost layer. All the profiling plating pens should be wrapped with the wrapping material before using the first profiling plating pen; the profiling plating pen should be soaked with the activation liquid or the plating liquid before starting to move.

10. The method for processing a spline continuous brush plating multi-layer heterogeneous coating according to claim 8, characterized in that: Before activation, the spline needs to be ultrasonically cleaned to remove impurities on the surface of the key teeth; before brush plating, use insulating tape to stick to the two end faces of the spline.

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