Rotary cup type electrostatic spraying electrode needle production device and production method

Abstract

The invention relates to the technical field of electrode needle production, and discloses a rotary cup type electrostatic spraying electrode needle production device which comprises a hot melting base and a pressing block mechanism, and the hot melting base is provided with a high-frequency heating coil used for melting brazing filler metal and a containing disc used for containing a copper base; the pressing block mechanism is hung above the placing disc through a supporting frame, the pressing block mechanism comprises a pressing block used for limiting the position of the spray point and a lifting servo mechanism, the pressing block is connected with the output end of the lifting servo mechanism, the lifting servo mechanism drives the pressing block to be close to or away from the placing disc in the vertical direction, and the high-frequency heating coil is located between the pressing block and the placing disc; the technical problems that in the prior art, when an electrode needle is manufactured, operation is complex, and production energy consumption is large are solved.

Description

Technical Field

[0001] The invention relates to the technical field of electrode needle production, and in particular to a rotary cup type electrostatic spraying electrode needle production device and a production method. Background Art

[0002] The rotary cup electrostatic spraying in the paint spraying process is an efficient and environmentally friendly coating technology. In the rotary cup electrostatic spraying, the workpiece to be coated (such as the car body) acts as the anode, grounded and connected to the positive electrode; while the rotary cup acts as the cathode, receiving the negative current from the high-voltage power supply. Based on the effects of electrostatic attraction and electric field force, when the paint is sent to the high-speed rotating rotary cup, the paint is diffused along the inner wall of the rotary cup under the action of centrifugal force to form a uniform film and flow to the mouth of the rotary cup. The paint flowing to the mouth of the rotary cup is also affected by the strong electric field force of the fine teeth on the edge of the rotary cup. The electric field force controls the movement direction of the paint particles, making the spray move regularly. Under the dual effects of centrifugal force and strong electric field, the paint is broken into extremely fine and charged droplets. These droplets quickly move to the surface of the workpiece with opposite polarity under the action of the electric field force, and are deposited on the surface of the workpiece to be coated, forming a uniform, flat, smooth and plump coating film.

[0003] Among the key components of the rotary cup electrostatic spraying, the electrode needles evenly distributed in a ring shape on the rotary cup play a vital role. These electrode needles are also called ring needles. On the same needle ring, the length of each electrode needle must be consistent to ensure that when the rotary cup rotates, each electrode needle can contact the paint at the same distance, thereby achieving uniform static electricity distribution. The center lines of each electrode needle on the same needle ring must be highly consistent to ensure that when the rotary cup rotates, each electrode needle can contact the paint at the same angle and position to enhance the atomization effect and deposition uniformity of the paint.

[0004] However, the production method of electrode needles is difficult to meet the above high-precision requirements. Electrode needles are usually composed of two parts: a copper base and a discharge needle. Figure 1 As shown, the copper base is a rotating body, and a blind hole for accommodating the discharge needle is arranged at its upper end along the axial direction. The bottom end of the discharge needle is a flat surface and inserted into the blind hole, and the upper end of the discharge needle is sharp. The manufacturing method of this type of electrode needle mostly uses copper molten casting technology to combine the copper base and the discharge needle.

[0005] This production method not only consumes a lot of energy, but also has a complicated operation process, requiring strict control of multiple parameters such as temperature, pressure and casting time. The slightest carelessness may lead to unstable product quality. More importantly, the potential safety hazards in the casting process cannot be ignored, such as copper molten splashing, mold explosion and other risks, which may cause harm to production personnel. Summary of the invention

[0006] The present invention aims to provide a rotary cup type electrostatic spraying electrode needle production device and production method to solve the technical problems of complex operation and high production energy consumption in the prior art when manufacturing electrode needles.

[0007] To achieve the above object, the present invention adopts the following technical scheme: a rotary cup type electrostatic spraying electrode needle production device, comprising a hot melt seat and a block pressing mechanism, the hot melt seat is provided with a high-frequency heating coil for melting the solder and a placement plate for placing the copper base;

[0008] The pressing block mechanism is suspended above the placement plate through a support frame. The pressing block mechanism includes a pressing block for limiting the position of the discharge needle and a lifting servo mechanism. The pressing block is connected to the output end of the lifting servo mechanism. The lifting servo mechanism drives the pressing block to approach or move away from the placement plate in the vertical direction. The high-frequency heating coil is located between the pressing block and the placement plate.

[0009] The principle and advantages of this scheme are: based on hot-melt brazing technology, by setting brazing material between the copper base and the discharge needle, and using a high-frequency heating coil to heat the brazing material to a molten state, the copper base and the discharge needle are firmly combined under the action of the brazing material; at the same time, the brazing material has liquid viscosity after melting, and the discharge needle is inserted into one end of the copper base with a blunt surface and a certain surface area, so that the discharge needle cannot sink to the bottom and directly contact the copper base, but is suspended in the liquid brazing material, and the discharge needle is pressed down and positioned by the pressing block mechanism to ensure that the copper base and the discharge needle are effectively combined. Among them, the lifting servo mechanism that drives the pressing block to move can be in various forms such as a servo cylinder, a four-degree electric cylinder, a screw lifting mechanism, and a linear module.

[0010] In actual application, the copper base is placed on the placement plate, and the solder and the discharge needle are placed into the copper base in turn, with the sharp end of the discharge needle facing upward; the lifting servo mechanism is driven by the control system to extend the output end, so that the pressing block is pressed down, and the high-frequency heating coil is started to heat the solder until the solder is melted; while the solder is melted, the pressing block is moved close to the placement plate in the vertical direction by gravity, so that the top of the discharge needle moves down to the preset position; the high-frequency heating coil is turned off, and the solder is completely cooled and solidified, and the combined electrode needle is taken out.

[0011] Compared with traditional casting technology, the hot melt brazing technology has a simpler operation process. There is no need to strictly control multiple parameters such as temperature, pressure and casting time. Only the power supply and duration of the high-frequency heating coil need to be controlled to accurately control the melting of the brazing material. Compared with casting technology, hot melt brazing technology has lower energy consumption and is conducive to energy conservation and emission reduction. It avoids safety hazards such as copper water sputtering and mold explosion in the traditional casting process, and improves the safety of production personnel. Through precise positioning and pressing, the quality of the electrode needle is ensured to be stable, which improves the overall quality and market competitiveness of the product.

[0012] Preferably, as an improvement, the bottom of the pressing block is provided with a positioning cone hole for accommodating the top of the discharge needle, the placement plate is provided with a positioning hole for accommodating the copper base, the positioning hole overlaps with the center line of the positioning cone hole, and the high-frequency heating coil is arranged around the solder.

[0013] The beneficial effect of this improvement is that when the center lines of the electrode needles on the same needle ring, i.e., the coaxiality of the copper base and the discharge needle is inconsistent or the lengths of the electrode needles are inconsistent, it will lead to uneven static distribution when the bell rotates, uneven coating thickness and orange peel phenomenon on the surface of the workpiece, which will reduce the overall quality and market competitiveness of the product.

[0014] According to the improved structure, the copper base is placed in the positioning hole of the placement plate to fix the position of the copper base. At the same time, when the pressing block moves downward, it is guided by the side slope of the positioning cone hole so that the top of the discharge needle coincides with the top of the positioning cone hole; the center lines of the positioning hole and the positioning cone hole overlap, so that the center lines of the electrode needle and the copper base overlap, ensuring the coaxiality and length consistency of the copper base and the discharge needle during the combination process; and the high-frequency heating coil is arranged around the solder, so that the high-frequency heating coil heats the solder circumferentially, improves the heating efficiency, and achieves uniform heating, thereby improving the product quality of the electrode needle.

[0015] Preferably, as an improvement, the support frame includes an upper platform, the lifting servo mechanism is fixedly mounted on the upper platform, the pressing block mechanism also includes an extension rod, a limit frame and a pressing block seat, the extension rod is sleeved outside the output end of the lifting servo mechanism and is slidably connected, a cavity for the output end of the lifting servo mechanism to move is provided in the extension rod, one end of the extension rod overlapping with the output end of the lifting servo mechanism is provided with a clamping assembly for preventing the output end of the lifting servo mechanism from slipping out of the extension rod, the other end of the extension rod passes through the upper platform and is fixed with a pressing block seat, and the pressing block is detachably mounted in the pressing block seat;

[0016] The limit frame is located between the lifting servo mechanism and the upper platform, the extension rod vertically passes through the limit frame, and a limit piece is installed on the extension rod section located in the limit frame. The limit piece includes a connecting part and an extension part. The connecting part is a ring sleeved on the extension rod, and the connecting part is detachably fixed on the extension rod. The extension part extends outward from the side of the connecting part, and a vertical bar hole is provided on the side of the limit frame for the extension part to pass through.

[0017] The upper platform is also provided with a proximity sensor for detecting the descending position of the pressing block, and the proximity sensor is located below the end of the extension component extending out of the limit frame.

[0018] The beneficial effect of this improvement is: the position of the limiter in the axial direction of the extension rod is preset, and the target height of the pressing block is accurately set by adjusting the position of the limiter. When the output end of the lifting servo mechanism moves downward, the extension rod will remain in place due to inertia, and the output end will further overlap in the extension rod, and there will be relative displacement between the output end and the extension rod; then the extension rod will move downward by gravity because it loses the upward pull of the output end; when the pressing block contacts the top of the discharge needle, the solder may not be completely melted at this time, and the pressing block has not reached the final downward position. At this time, the limiter does not trigger the proximity sensor, and the high-frequency heating coil continues to work; when the solder gradually melts and the pressing block gradually drops to the preset height, the proximity sensor will sense the approach of the extension part on the limiter, thereby triggering a signal. This signal can be used to accurately control the contact between the limiter and the upper platform, that is, the high-frequency heating coil stops heating when the pressing block reaches the final downward position, ensuring that the solder melting stage quickly enters the cooling stage, while avoiding the degradation of material performance or increased energy consumption that may be caused by overheating. This automated precise control not only improves production efficiency, but also ensures the stability and consistency of product quality.

[0019] Preferably, as an improvement, a cooling chamber is further provided below the hot melt seat, a container tank is placed in the cooling chamber, a coolant for cooling the solder is contained in the container tank, and the container tank is located below the placement plate;

[0020] The positioning hole is a vertical through hole, a translation servo mechanism is embedded in the hot melt seat, the output end of the translation servo mechanism moves close to or away from the placement disk in the horizontal direction, a translation groove is provided in the hot melt seat for the output end of the translation servo mechanism to move, and the end of the translation groove connects the positioning hole and the cooling chamber; when the output end of the translation servo mechanism is at the extension limit position, the end of the output end of the translation servo mechanism is located below the placement disk to block the positioning hole; when the output end of the translation servo mechanism is at the contraction limit position, the end of the output end of the translation servo mechanism is offset from the placement disk, and the positioning hole is in a through state.

[0021] The beneficial effect of this improvement is that the setting of the cooling chamber, especially the container tank filled with coolant, provides an instant and efficient cooling environment for the high-temperature combination (copper base and discharge needle). When the high-frequency heating coil is turned off and the welding is completed, there is no need for manual transfer. The control system drives the translation servo mechanism to shrink to the extreme position. The combination in the placement tray falls into the container tank due to the lack of bottom support. The combination is immersed in the coolant and cooled, thereby greatly shortening the cooling time. This automated cooling process not only improves production efficiency, but also reduces errors and delays that may be introduced by manual operation. During the vertical fall of the combination, the discharge needle will not be subjected to any impact or interference, avoiding the quality of the finished product caused by impact when the solder has not been completely cooled. The setting of the translation servo mechanism and the cooling chamber makes the entire device compact and efficient, further improving production efficiency and quality level.

[0022] Preferably, as an improvement, the solder is a silver alloy solder, there are multiple positioning holes and positioning cone holes, and the distribution of the multiple positioning holes and the multiple positioning cone holes is the same;

[0023] An internal threaded hole is provided on the side of the connecting part of the position-limiting member, the internal threaded hole of the connecting part communicates with the inner and outer sides of the circular ring of the connecting part, a first threaded hole is provided in the internal threaded hole of the connecting part, and the first screw is internally screwed to tighten the extension rod;

[0024] The inner side of the pressing block seat is provided with a fixing groove for accommodating the pressing block, and the side of the pressing block seat is provided with an internal threaded hole, the internal threaded hole of the pressing block seat connects the outside and the fixing groove, and a second screw is provided in the internal threaded hole of the pressing block seat, and the second screw is screwed inward to press the pressing block tightly.

[0025] The beneficial effect of this improvement is that the melting point of the silver alloy solder is lower than that of the copper base and the discharge needle, which means that during the welding process, the solder can melt and fill the gap faster to form a strong welding joint, and the copper base and the discharge needle will not be deformed due to heating. At the same time, since the distribution of multiple positioning holes and positioning cone holes is the same, multiple electrode needles on a single ring needle can be produced in the same batch, which not only improves production efficiency, but also ensures the consistency and accuracy of each electrode needle on a single ring needle during the welding process.

[0026] By adjusting the first screw and the second screw, the position of the limiter on the extension rod and the fixed state of the pressing block in the pressing block seat can be accurately controlled. This detachable fixing structure enables the operator to easily adjust or replace the limiter and the pressing block according to production requirements, thereby adjusting the overall length and coaxiality of the electrode needle finally produced. This provides great convenience for the production of electrode needles of different specifications.

[0027] Preferably, as an improvement, the high-frequency heating coil is electrically connected to a high-frequency power supply for providing high-frequency alternating current through a wire; the production device includes an automatic mode and a manual mode, and the lifting servo mechanism, the translation servo mechanism, the proximity sensor and the high-frequency power supply are all connected to the electrical signal of the control system for executing the automatic mode.

[0028] The beneficial effect of this improvement is that when high-frequency alternating current is transmitted to the high-frequency heating coil through the wire, the current forms a closed loop on the high-frequency heating coil, thereby generating a strong electromagnetic field and eddy current effect around the solder, achieving rapid heating. This high-frequency heating method not only improves the heating efficiency, but also ensures the uniformity and stability of heating, which helps to obtain better welding quality and finished product performance.

[0029] In automatic mode, the production unit can perform automated production according to preset procedures and parameters, greatly improving production efficiency and quality stability. Although the automatic mode provides an efficient production method, in some cases, operators may need to intervene or adjust manually. Therefore, the introduction of manual mode can ensure that the production unit can be flexibly controlled manually when necessary to meet specific production needs or solve unexpected problems. This combination of automatic and manual control makes the production unit more flexible and practical.

[0030] By switching between automatic and manual modes, operators can arrange production processes reasonably according to the complexity and urgency of production tasks. This helps optimize the use efficiency of production resources, reduce waste and delays in the production process, and thus improve overall production efficiency.

[0031] The present application also discloses a method for producing a rotary cup electrostatic spraying electrode needle, comprising: placing a solid solder and the bottom end of a discharge needle into the hole of a copper base in sequence, heating and melting the solder between the discharge needle and the copper base, and adjusting and limiting the position of the discharge needle and the copper base during the melting of the solder; when the discharge needle and the copper base have been adjusted and limited to the target position, stopping heating the solder.

[0032] The principle and advantages of this scheme are: This scheme adopts the principle of brazing for production. Brazing is a welding method that achieves connection by heating the brazing material below the melting point of the base material, using the liquid brazing material to wet the surface of the base material, fill the joint gap and diffuse with the base material. In this scheme, the solid brazing material is placed in the hole of the copper base and contacts the bottom end of the discharge needle. When the brazing material is heated to a molten state, it wets and fills the gap between the discharge needle and the copper base, and then cools and solidifies to form a strong connection.

[0033] During the melting of the solder, the positions of the discharge needle and the copper base are adjusted and limited to ensure that the relative position between them meets the design requirements. When the position adjustment is completed, the heating is stopped and the solder is allowed to cool and solidify, thereby completing the production of the electrode needle. The use of solid solder instead of copper water casting makes the melting of the solder more controllable during operation. This helps to accurately control the heating time and temperature, thereby ensuring the quality and stability of the brazing process. Since the melting point of the solder is lower than the melting point of copper, high-temperature copper water will not be generated during the heating process, reducing safety risks such as burns and fires. Compared with the production method of preparing copper water, this solution only melts the solder during the combination, without heating the entire copper base to the melting point of copper. This significantly reduces energy consumption and improves production efficiency. By accurately controlling the brazing process, it is possible to ensure that a good metallurgical bond is formed between the discharge needle and the copper base, thereby improving the connection strength. Since the brazing process is relatively simple and easy to control, the relative position and angle between the discharge needle and the copper base can be adjusted as needed to meet the production needs of different products.

[0034] Preferably, as an improvement, a method for producing a rotary cup type electrostatic spraying electrode needle using the rotary cup type electrostatic spraying electrode needle production device comprises:

[0035] S1. In manual mode, manually adjust the translation servo mechanism to the limit position close to the placement plate, and place three or more electrode needles of standard length on the placement plate, and then manually adjust the lifting servo mechanism to the lower limit position; loosen the second screw, adjust the position of the pressing block, so that the top of the electrode needle is aligned with the top of the positioning cone hole, and tighten the second screw to lock the position of the pressing block;

[0036] S2. Loosen the first screw to release the limiter, adjust the axial position of the limiter on the extension rod so that the bottom end of the extended part of the limiter contacts the upper platform, and then tighten the first screw to fix the relative position of the limiter on the extension rod; restore the lifting servo mechanism to the upper limit position, and take out the finished electrode needle in the placement tray.

[0037] The beneficial effect of this improvement is that in manual mode, by placing three or more standard length electrode needle products on the placement plate and adjusting the position of the pressing block so that its top is aligned with the top of the positioning cone hole, the consistency of the positioning holes and the positioning cone holes in the area where the electrode needle products are not placed can be ensured. This adjustment method can effectively avoid production errors caused by misalignment between the positioning holes and the positioning cone holes, and improve the production accuracy of the electrode needles.

[0038] By placing finished electrode needles of standard length in advance and adjusting them, the step of individually positioning each electrode needle during the production process can be omitted, thereby simplifying the production preparation process and improving production efficiency. The adjustment method before trial production can ensure that the production equipment is in the best condition before formal production, reduce production fluctuations caused by improper equipment adjustment, and improve production stability and reliability.

[0039] Preferably, as an improvement, it also includes:

[0040] S3, placing the solder and the discharge needle into the copper base in sequence and assembling them into a combination, inserting the combination into the positioning hole of the placement slot, pressing the start button to start production in the automatic mode, the lifting servo mechanism is driven by the control system to extend the output end, the output end of the lifting servo mechanism releases the lifting restriction on the extension rod, and the extension rod moves downward by gravity, and at the same time, the control system enables the high-frequency power supply to power the high-frequency heating coil, and then the high-frequency heating coil heats the solder in the placement tray to melt it;

[0041] When the limit piece moves down with the pressure block and triggers the proximity sensor, the proximity sensor sends a high level to the control system. The control system starts a delay of 1s and then stops the high-frequency power supply to the high-frequency heating coil. When the high-frequency heating coil stops heating the solder of the combination, the control system drives the translation servo mechanism to shrink to the limit position. The combination in the placement plate falls into the container slot due to the lack of bottom support. The combination is immersed in coolant and cooled. The production of a single electrode needle is completed. The control system drives the lifting servo mechanism to shrink to the upper limit position and the translation servo mechanism to extend to the limit position close to the placement plate, and waits for the next start button to be pressed.

[0042] The beneficial effect of this improvement is that when the proximity sensor is triggered, the limiter may not have fully contacted the upper platform. By introducing a control strategy with a delay of 1 second, it can be ensured that the pressing block has enough time to reach the final downward position. Delay control can reduce problems such as poor welding or inconsistent electrode needle length caused by the pressing block not falling into place, thereby improving the production accuracy and consistency of the electrode needle. By accurately controlling the delay time, it can ensure that each link in the production process is closely connected, avoid the disorder of production rhythm, and improve the overall production efficiency.

[0043] Preferably, as an improvement, S4, take out the coupling in the container slot, measure the overall length of the coupling and the coaxiality of the copper base and the discharge needle, and compare whether the overall length and coaxiality meet the finished electrode needle standard; if the coupling meets the finished electrode needle standard, repeat S3 to mass produce the electrode needles; if the coupling does not meet the finished electrode needle standard, fine-tune the position of the limiter and the pressing block in manual mode, and execute S3-S4 again.

[0044] The beneficial effect of this improvement is that by optimizing the trial production process and the formal production process, waste and duplication of labor in the production process can be reduced, thereby reducing production costs. At the same time, a stable production process and high-quality products also help to improve market competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a half-section view of the copper base and discharge needle.

[0046] Figure 2 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention.

[0047] Figure 3 It is a front view of an embodiment of the present invention.

[0048] Figure 4 It is a left view of an embodiment of the present invention.

[0049] Figure 5 for Figure 4 Section view along section line AA. DETAILED DESCRIPTION

[0050] The following is further described in detail through specific implementation methods:

[0051] The figure marks in the drawings of the specification include: hot melt seat 1, copper base 2, discharge needle 3, placement plate 4, high-frequency heating coil 5, support rod 6, upper platform 7, lifting cylinder 8, extension rod 9, limit frame 10, pressure block seat 11, pressure block 12, limit member 13, micro-motion sensor 14, first screw 15, second screw 16, cooling chamber 17, container slot 18 and translation cylinder 19.

[0052] Example

[0053] Basically as attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 as well as Figure 5 As shown, a rotary cup type electrostatic spraying electrode needle production device and production method, wherein the rotary cup type electrostatic spraying electrode needle production device includes: a hot melt seat 1 and a pressing block 12 mechanism, a copper base 2, a solder, and a discharge needle 3 are sequentially combined to form a combination, the combination is placed on the hot melt seat 1 for heating and combination, the pressing block 12 mechanism is suspended above the combination, and the discharge needle 3 of the combination is pressed down to a preset height, so that after heating is completed, the relative positions of the fixed copper base 2 and the discharge needle 3 meet the finished product specifications.

[0054] The hot melt seat 1 is provided with a high-frequency heating coil 5 and a placement plate 4. The placement plate 4 is provided with a plurality of positioning holes, and the copper base 2 can be inserted and temporarily stored in the positioning holes. The high-frequency heating coil 5 is an open ring structure with parallel rods. The high-frequency heating coil 5 includes an open ring part and a parallel rod part. The open ring part is a circular open ring, and one side of the circular open ring is provided with an unclosed opening. The parallel rod part is two parallel rod-shaped structures extending from the open end of the open ring part. The open ring and the parallel rod part are integrated together by seamless connection or welding to form an integral structure.

[0055] The open ring end of the high-frequency heating coil 5 is located above the placement tray 4 and circumferentially surrounds the multiple combinations inserted in the placement tray 4. The parallel rod end of the high-frequency heating coil 5 is fixedly connected to the hot melt seat 1 through the mounting seat. The parallel rod end of the high-frequency heating coil 5 is electrically connected to the high-frequency power supply through a wire, and the high-frequency power supply provides high-frequency alternating current to the high-frequency heating coil 5, so that the high-frequency heating coil 5 heats the combination.

[0056] The pressing block 12 mechanism is suspended above the placement plate 4 through a support frame, and the support frame includes a support rod 6 and an upper platform 7. The support rod 6 is vertically arranged on the hot melt seat 1 away from the placement plate 4. The base of the support rod 6 is fixedly welded to the hot melt seat 1, and the upper platform 7 is detachably fixed on the support rod 6, so that the upper platform 7 is parallel to the hot melt seat 1. The specific structure of the upper platform 7 fixed on the support rod 6 is: a hole for the support rod 6 to pass through is provided on the upper platform 7, and an internal threaded hole communicating with the hole is also provided on the side of the upper platform 7. The screw is rotated from the internal threaded hole to extend into the hole and abut against the support rod 6. The relative position of the upper platform 7 and the support rod 6 is fixed by the static friction between the support rod 6, the screw and the inner wall of the hole.

[0057] The pressing block 12 mechanism includes a lifting cylinder 8, an extension rod 9, a limit frame 10, a pressing block seat 11 and a pressing block 12. The piston rod of the lifting cylinder 8 is arranged vertically downward, the extension rod 9 is sleeved outside the end of the piston rod and is slidably connected, the extension rod is in the shape of a hollow tube, and a cavity is provided in the extension rod for the piston rod of the lifting cylinder 8 to move, and one end of the extension rod 9 overlapping with the piston rod of the lifting cylinder 8 is provided with a clamping assembly for preventing the output end of the lifting servo mechanism from slipping out of the extension rod. The clamping assembly is that the overlapping end of the extension rod 9 is provided with a first clamping edge extending inward, and the end of the piston rod of the lifting cylinder 8 is a second clamping edge extending outward. The inner diameter of the first clamping edge is smaller than the outer diameter of the second clamping edge, so that the end of the piston rod of the lifting cylinder 8 cannot fall out of the cavity in the extension rod 9. The upper platform 7 is provided with a lifting hole for the extension rod 9 to pass through, and the lifting hole is in the shape of a downwardly extending hole tube. A limit frame 10 is also provided between the lifting cylinder 8 and the upper platform 7 , and a pressure block seat 11 is fixedly installed at the end of the extension rod 9 located below the upper platform 7 , and a pressure block 12 is detachably fixed in the pressure block seat 11 .

[0058] A limit member 13 is fixedly installed on the extension rod 9 section in the limit frame 10. The limit member 13 includes a connecting member and an extension member. The connecting member is a circular ring sleeved on the extension rod 9. An internal threaded hole is provided on the side of the circular ring. The internal threaded hole connects the inner side and the outer side of the circular ring. The first screw 15 passes through the internal threaded hole and is screwed inwardly against the extension rod 9 to fix the limit member 13 to the extension rod 9. The extension member is symmetrically arranged on both sides of the connecting member, and the connecting member and the extension member are integrally formed. Symmetrical strip holes are provided on both sides of the limit frame 10 for the extension member to pass through; the strip holes of the limit frame 10 are vertically arranged so that the extension member can only move vertically along the strip holes.

[0059] The end of the extension part extending out of the limit frame 10 is bent downward, and the upper platform 7 is also equipped with a micro-motion sensor 14, which is located below the end of the extension part extending out of the limit frame 10. When the piston rod of the lifting cylinder 8 extends downward, the extension rod 9 moves downward, and then the extension part of the limit member 13 moves down along the bar hole to approach the micro-motion sensor 14. When the limit member 13 drops to a certain height, the limit member 13 triggers the micro-motion sensor 14, and the micro-motion sensor 14 sends a high level to the control system. The micro-motion sensor 14 can be a magnetic induction contact sensor, an optical proximity sensor, etc., for example, the DS-PG series, the MSE-LED10 series, etc.

[0060] The pressing block seat 11 is provided with a fixing groove for accommodating the pressing block 12, and the side of the pressing block seat 11 is provided with an internal threaded hole, which connects the outside and the fixing groove, and a second screw 16 is provided in the internal threaded hole, and the second screw 16 presses the pressing block 12 from the outside to the inside through the internal threaded hole to achieve fixation. The bottom of the pressing block 12 is provided with a plurality of positioning cone holes, which are opposite to the positioning holes on the placement plate 4, and the positioning cone holes contact and press down the discharge needle 3 floating on the surface of the molten solder.

[0061] A cooling chamber 17 is further provided below the hot melt seat 1 , in which a container tank 18 is placed. The container tank 18 is filled with a coolant for cooling the combined parts. The container tank 18 is located below the placement tray 4 .

[0062] The positioning hole of the placement plate 4 is a vertical through hole, and a translation cylinder 19 is embedded in the hot melt seat 1. The piston rod of the translation cylinder 19 moves toward or away from the placement plate 4. A translation groove is provided in the hot melt seat 1 to accommodate the movement of the piston rod of the translation cylinder 19, and the end of the translation groove communicates with the positioning hole and the cooling chamber 17. When the piston rod of the translation cylinder 19 is at the extension limit position, the end of the piston rod of the translation cylinder 19 is located directly below the placement plate 4 to block the positioning hole; when the piston rod of the translation cylinder 19 is at the contraction limit position, the end of the piston rod of the translation cylinder 19 is offset from the placement plate 4, and the positioning hole is in a through state.

[0063] The plurality of positioning holes on the placement plate 4 are evenly distributed in a multi-layer nested ring shape. In this embodiment, there are eight positioning holes.

[0064] The solder is a silver alloy, and the melting point of the silver alloy solder is lower than that of the copper base 2 and the discharge needle 3. The height of the open ring part of the high-frequency heating coil 5 is located at the height of the solder inserted into the placement tray 4, so that the high-frequency heating coil 5 concentrates on heating the solid solder to melt it into a liquid state. After the solder is melted, it has liquid viscosity, and the discharge needle 3 has a certain surface area at one end of the copper base 2, so that the discharge needle 3 cannot sink to the bottom and directly contact the copper base 2, but is suspended in the liquid solder. After the pressing block 12 is in place, all the electrode needles in the placement tray 4 maintain the same height under the action of the placement tray 4 and the pressing block 12.

[0065] The rotary cup type electrostatic spraying electrode needle production device includes two modes: automatic and manual. When the production device is in automatic mode, the lifting cylinder 8, the translation cylinder 19, the micro-motion sensor 14 and the high-frequency power supply for providing electric energy to the electrically heated metal parts are all controlled by the control system.

[0066] The production method of the rotary cup type electrostatic spraying electrode needle includes:

[0067] S1. In manual mode, manually adjust the translation cylinder 19 to the limit position close to the placement plate 4, and place three or more electrode needles of standard length on the placement plate 4, and then manually adjust the lifting cylinder 8 to the lower limit position; loosen the second screw 16, adjust the position of the pressing block 12, so that the top of the electrode needle is aligned with the top of the positioning cone hole, and tighten the second screw 16 to lock the position of the pressing block 12;

[0068] S2. Loosen the first screw 15 to release the limiter 13, and adjust the axial position of the limiter 13 along the extension rod 9. At this time, the extension rod 9 is only supported by the electrode needle, and the final downward position of the pressing block is limited by the length of the standard electrode needle. Adjust the bottom end of the extended part of the limiter 13 to contact the upper platform 7, and then tighten the first screw 15 to fix the relative position of the limiter 13 on the extension rod 9; restore the lifting cylinder 8 to the upper limit position, and the extension rod 9 is lifted up with the end of the piston rod of the lifting cylinder 8, and the finished electrode needle in the placement tray 4 is taken out.

[0069] S3, put the solder and the discharge needle 3 into the blind hole of the copper base 2 in sequence and combine them into a combination, insert the combination into the positioning hole of the placement slot, press the start button to produce in the automatic mode, the lifting cylinder 8 is driven by the control system to extend the piston rod, the lifting cylinder 8 releases the lifting of the extension rod 9, so that the extension rod 9 moves downward with gravity, and the pressing block 12 is pressed down accordingly, at the same time, the control system enables the high-frequency power supply to power the high-frequency heating coil 5, and then the high-frequency heating coil 5 heats the solder in the placement plate 4 to melt it;

[0070] The pressing block 12 moves downward to contact the top of the discharge needle of the coupling. If the solder is not completely melted at this time, the pressing block 12 cannot reach the final downward position, and the high-frequency heating coil 5 continues to work; as the solder gradually melts, the pressing block 12 and the limiter 13 move further downward.

[0071] When the limiter 13 moves down to a certain height with the pressing block 12, the limiter 13 triggers the micro-motion sensor 14, and the micro-motion sensor 14 sends a high level to the control system. The control system starts a delay of 1s and then stops the high-frequency power supply to the high-frequency heating coil 5. During this 1s, the pressing block 12 moves down to the final downward position, and the limiter 13 contacts the upper platform 7; when the high-frequency heating coil 5 stops heating the solder of the combination, the control system drives the translation cylinder 19 to shrink to the limit position, and the combination in the placement plate 4 falls into the container groove 18 due to the lack of bottom support force. The combination is immersed in the coolant and cooled, and the single electrode needle production is completed. The control system drives the lifting cylinder 8 to shrink to the upper limit position and the translation cylinder 19 to extend to the limit position close to the placement plate 4, and waits for the next start button to be pressed; wherein, during the shrinkage process of the lifting cylinder 8, the piston rod of the lifting cylinder 8 slides relatively in the extension rod 9 until the second clamping edge of the lifting cylinder 8 contacts the first clamping edge of the extension rod 9, and the piston rod of the lifting cylinder 8 pulls the extension rod 9 up together.

[0072] S4. Take out the combination in the container groove 18, measure the overall length of the combination and the coaxiality of the copper base 2 and the discharge needle 3, and compare whether the overall length and coaxiality meet the finished electrode needle standard; if the combination meets the finished electrode needle standard, repeat S3 to mass produce electrode needles; if the combination does not meet the finished electrode needle standard, fine-tune the position of the limiter 13 and the pressing block 12 in manual mode, and execute S3-S4 again.

[0073] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. Rotary cup type electrostatic spraying electrode needle production device, characterized by: It includes a hot melt seat and a pressing block mechanism. The hot melt seat is provided with a high-frequency heating coil for melting the solder and a placement plate for placing the copper base. The pressing block mechanism is suspended above the placement plate through a support frame. The pressing block mechanism includes a pressing block for limiting the position of the discharge needle and a lifting servo mechanism. The pressing block is connected to the output end of the lifting servo mechanism. The lifting servo mechanism drives the pressing block to approach or move away from the placement plate in the vertical direction. The high-frequency heating coil is located between the pressing block and the placement plate.

2. The rotary cup type electrostatic spraying electrode needle production device according to claim 1 is characterized in that: The bottom of the pressing block is provided with a positioning cone hole for accommodating the top of the discharge needle, the placement plate is provided with a positioning hole for accommodating the copper base, the positioning hole overlaps with the center line of the positioning cone hole, and the high-frequency heating coil is arranged around the solder.

3. The rotary cup type electrostatic spraying electrode needle production device according to claim 2 is characterized in that: The support frame includes an upper platform, the lifting servo mechanism is fixedly mounted on the upper platform, the pressing block mechanism also includes an extension rod, a limit frame and a pressing block seat, the extension rod is sleeved outside the output end of the lifting servo mechanism and is slidably connected, a cavity for the output end of the lifting servo mechanism to move is provided in the extension rod, one end of the extension rod overlapping with the output end of the lifting servo mechanism is provided with a clamping assembly for preventing the output end of the lifting servo mechanism from slipping out of the extension rod, the other end of the extension rod passes through the upper platform and is fixed with a pressing block seat, and the pressing block is detachably mounted in the pressing block seat; The limit frame is located between the lifting servo mechanism and the upper platform, the extension rod vertically passes through the limit frame, and a limit piece is installed on the extension rod section located in the limit frame. The limit piece includes a connecting part and an extension part. The connecting part is a ring sleeved on the extension rod, and the connecting part is detachably fixed on the extension rod. The extension part extends outward from the side of the connecting part, and a vertical bar hole is provided on the side of the limit frame for the extension part to pass through. The upper platform is also provided with a proximity sensor for detecting the descending position of the pressing block, and the proximity sensor is located below the end of the extension component extending out of the limit frame.

4. The rotary cup type electrostatic spraying electrode needle production device according to claim 3 is characterized in that: A cooling chamber is also provided below the hot melt seat, in which a container tank is placed, and a coolant for cooling the solder is contained in the container tank, and the container tank is located below the placement plate; The positioning hole is a vertical through hole, a translation servo mechanism is embedded in the hot melt seat, the output end of the translation servo mechanism moves close to or away from the placement disk in the horizontal direction, a translation groove is provided in the hot melt seat for the output end of the translation servo mechanism to move, and the end of the translation groove connects the positioning hole and the cooling chamber; when the output end of the translation servo mechanism is at the extension limit position, the end of the output end of the translation servo mechanism is located below the placement disk to block the positioning hole; when the output end of the translation servo mechanism is at the contraction limit position, the end of the output end of the translation servo mechanism is offset from the placement disk, and the positioning hole is in a through state.

5. The rotary cup type electrostatic spraying electrode needle production device according to claim 4 is characterized in that: The solder is a silver alloy solder, there are a plurality of positioning holes and positioning cone holes, and the distribution of the plurality of positioning holes and the plurality of positioning cone holes is the same; An internal threaded hole is provided on the side of the connecting part of the position-limiting member, the internal threaded hole of the connecting part communicates with the inner and outer sides of the circular ring of the connecting part, a first threaded hole is provided in the internal threaded hole of the connecting part, and the first screw is internally screwed to tighten the extension rod; The inner side of the pressing block seat is provided with a fixing groove for accommodating the pressing block, and the side of the pressing block seat is provided with an internal threaded hole, the internal threaded hole of the pressing block seat connects the outside and the fixing groove, and a second screw is provided in the internal threaded hole of the pressing block seat, and the second screw is screwed inward to press the pressing block tightly.

6. The rotary cup type electrostatic spraying electrode needle production device according to claim 5 is characterized in that: The high-frequency heating coil is electrically connected through a wire to provide a high-frequency current for the heating process; the production device includes an automatic mode and a manual mode, and the lifting servo mechanism, the translation servo mechanism, the proximity sensor and the high-frequency power supply are all connected to the control system electrical signal for executing the automatic mode.

7. A method for producing a rotary cup type electrostatic spraying electrode needle, characterized in that: include: The solid solder and the bottom end of the discharge needle are placed in the hole of the copper base in turn, the solder between the discharge needle and the copper base is heated and melted, and the positions of the discharge needle and the copper base are adjusted and limited during the melting process of the solder; when the discharge needle and the copper base have been adjusted and limited to the target position, the heating of the solder is stopped.

8. The method for producing a rotary cup type electrostatic spraying electrode needle according to claim 7, characterized in that: The production method is produced by using the rotary cup type electrostatic spraying electrode needle production device described in claim 6, and the specific steps are: S1. In manual mode, manually adjust the translation servo mechanism to the limit position close to the placement plate, and place three or more electrode needles of standard length on the placement plate, and then manually adjust the lifting servo mechanism to the lower limit position; loosen the second screw, adjust the position of the pressing block, so that the top of the electrode needle is aligned with the top of the positioning cone hole, and tighten the second screw to lock the position of the pressing block; S2. Loosen the first screw to release the limiter, adjust the axial position of the limiter on the extension rod so that the bottom end of the extended part of the limiter contacts the upper platform, and then tighten the first screw to fix the relative position of the limiter on the extension rod; restore the lifting servo mechanism to the upper limit position, and take out the finished electrode needle in the placement tray.

9. The method for producing a rotary cup type electrostatic spraying electrode needle according to claim 8, characterized in that: Also includes: S3, placing the solder and the discharge needle into the copper base in sequence and assembling them into a combination, inserting the combination into the positioning hole of the placement slot, pressing the start button to start production in the automatic mode, the lifting servo mechanism is driven by the control system to extend the output end, the output end of the lifting servo mechanism releases the lifting restriction on the extension rod, and the extension rod moves downward by gravity, and at the same time, the control system enables the high-frequency power supply to power the high-frequency heating coil, and then the high-frequency heating coil heats the solder in the placement tray to melt it; When the limit piece moves down with the pressure block and triggers the proximity sensor, the proximity sensor sends a high level to the control system. The control system starts a delay of 1s and then stops the high-frequency power supply to the high-frequency heating coil. When the high-frequency heating coil stops heating the solder of the combination, the control system drives the translation servo mechanism to shrink to the limit position. The combination in the placement plate falls into the container slot due to the lack of bottom support. The combination is immersed in coolant and cooled. The production of a single electrode needle is completed. The control system drives the lifting servo mechanism to shrink to the upper limit position and the translation servo mechanism to extend to the limit position close to the placement plate, and waits for the next start button to be pressed.

10. The method for producing a rotary cup type electrostatic spraying electrode needle according to claim 9, characterized in that: Also includes: S4. Take out the combination in the container slot, measure the overall length of the combination and the coaxiality between the copper base and the discharge needle, and compare whether the overall length and coaxiality meet the finished electrode needle standard; if the combination meets the finished electrode needle standard, repeat S3 to mass produce electrode needles; if the combination does not meet the finished electrode needle standard, fine-tune the position of the limiter and the pressure block in manual mode, and execute S3-S4 again.

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