Precision parts constant temperature processing system and processing method thereof

Abstract

The present invention discloses a constant temperature processing system for precision parts and a processing method thereof, wherein the constant temperature processing system for precision parts includes a processing room, forming a closed space; a CNC machine tool, located in the processing room, having a rotatable and movable spindle, and a cooling pipe in the spindle; a constant temperature cutting fluid supply system, connected to the cooling pipe in the nozzle and spindle in the CNC machine tool, having a structure for providing cutting fluid with a constant temperature to the nozzle and spindle; an environmental constant temperature control system, having a structure for maintaining a constant temperature in the processing room. This solution uses a multi-faceted temperature control structure to achieve constant ambient temperature, spindle temperature, and cutting fluid temperature during CNC machine tool processing, effectively avoiding the influence of temperature changes of different factors on processing quality, fully meeting the processing requirements of high-static parts, and greatly improving the product yield.

Description

Technical Field

[0001] The invention relates to the field of machine tools, in particular to a precision parts constant temperature processing system and a processing method thereof. Background Art

[0002] CNC machine tool is the abbreviation of digital control machine tool, which is an automated machine tool equipped with a program control system. The control system can logically process programs specified by control codes or other symbolic instructions, decode them, express them in coded numbers, and input them into the CNC device through information carriers. After calculation and processing, the CNC device sends various control signals to control the movement of the machine tool and automatically process the parts according to the shape and size required by the drawing.

[0003] For various high-precision parts in the fields of aviation parts, precision electronics, medical equipment, etc., high processing accuracy is required. These precision parts are very sensitive to temperature changes when processed by CNC machine tools. Sometimes, very small temperature changes will cause the final workpiece to not meet the requirements.

[0004] Therefore, various constant temperature CNC machine tools have emerged to reduce the corresponding temperature effects, such as the CNC machine tools disclosed in the prior arts with application numbers 201721110930.8, 20121339526.3, and 201610997692.0, which respectively implement constant temperature control from different aspects to reduce temperature interference.

[0005] However, these solutions only solve the temperature interference from one aspect. In machine tool processing, the temperature requirements that affect the processing accuracy are multifaceted. For example, the temperature of the environment where the CNC machine tool is located, the temperature of the coolant, the temperature of the workpiece, etc. will all affect the final processing accuracy. Therefore, a processing system that integrates various temperature factors is required to meet the processing requirements of high-precision parts. Summary of the invention

[0006] The purpose of the present invention is to solve the above problems existing in the prior art and to provide a precision parts constant temperature processing system and a processing method thereof.

[0007] The purpose of the present invention is achieved through the following technical solutions:

[0008] Precision parts constant temperature processing system, including

[0009] The processing room forms a closed space;

[0010] A numerically controlled machine tool, located in the processing room, having a rotatable and movable spindle, wherein the spindle has a cooling pipe;

[0011] A constant temperature cutting fluid supply system is connected to the cooling pipes in the nozzle and the spindle of the CNC machine tool, and has a structure for providing cutting fluid of a constant temperature to the nozzle and the spindle;

[0012] The environmental constant temperature control system has a structure for maintaining a constant temperature in the processing room.

[0013] Preferably, in the constant temperature processing system for precision parts, the processing room includes a roof, a floor, and a plurality of partition curtains extending from the roof to the floor and enclosing a wall.

[0014] Preferably, in the constant temperature processing system for precision parts, the CNC machine tool includes a processing chamber with an inner cavity, a spindle and a spindle driving mechanism for driving the spindle to at least perform lifting and rotation are arranged in the processing chamber, a workpiece fixing device is arranged below the spindle, a cutting fluid reflux chamber is arranged below the workpiece fixing device, and a top plate of the cutting fluid reflux chamber has a filter hole.

[0015] Preferably, in the constant temperature processing system for precision parts, the constant temperature cutting fluid supply system includes a cooling heater, the liquid inlet end of the cooling heater is connected to a reflux pump, and the liquid outlet end is connected to a cutting fluid collecting tank, the reflux pump is connected to the cutting fluid reflux chamber of the CNC machine tool through a reflux pipeline, and the cutting fluid collecting tank is connected to at least the nozzle through a liquid supply pipeline with a pump.

[0016] Preferably, in the precision parts constant temperature processing system, the liquid supply pipeline is also connected to the cooling pipeline, and the cooling pipeline is connected to the reflux pump through a circulation pipeline.

[0017] Preferably, in the precision parts constant temperature processing system, the nozzle is arranged around the main shaft and moves synchronously with the main shaft, and its nozzle faces the workpiece fixing device.

[0018] Preferably, in the constant temperature processing system for precision parts, the constant temperature cutting fluid supply system also includes a cutting fluid configuration delivery pipeline for supplying cutting fluid to the cooling heater, the cutting fluid configuration delivery pipeline includes a raw liquid barrel, the raw liquid barrel is connected to a venturi tube through an outlet pipe extending to the bottom thereof, the liquid inlet end of the venturi tube is connected to a water supply pipeline, the solenoid valve in the water supply pipeline is connected to a control device, the liquid outlet end of the venturi tube is connected to a liquid reservoir through a liquid outlet pipe, and the liquid reservoir is connected to the liquid inlet end of the reflux pump.

[0019] Preferably, in the precision parts constant temperature processing system, the water supply pipeline includes two branches, the fluid in one branch does not pass through the Venturi tube, and the fluid in the other branch passes through the Venturi tube.

[0020] Preferably, in the constant temperature processing system for precision parts, the processing chamber is connected to an exhaust gas exhaust pipeline, the exhaust gas exhaust pipeline includes an exhaust pipe connected to an air outlet on the processing chamber, the exhaust pipe is connected to an exhaust device located outside the processing chamber, the exhaust device is connected to a water mist filter, and the exhaust device is started and stopped by a signal sent to a control device by a control button and / or a hygrometer.

[0021] The processing method of the precision parts constant temperature processing system includes the following steps:

[0022] S1, turn on the environmental constant temperature control system to keep the temperature in the processing room constant at the target temperature;

[0023] S2, placing the workpiece in the processing room for 4-6 hours to match the temperature of the workpiece with the temperature in the processing room;

[0024] S3, placing the workpiece in step S2 in a CNC machine tool and fixing it;

[0025] S4, the CNC machine tool starts processing, and at the same time the constant temperature cutting fluid supply system provides constant temperature cutting fluid to the nozzle and the cooling pipe.

[0026] The advantages of the technical solution of the present invention are mainly reflected in:

[0027] This solution uses a multi-faceted temperature control structure to ensure that the ambient temperature, spindle temperature, and cutting fluid temperature remain constant during CNC machine tool processing, effectively avoiding the impact of temperature changes of different factors on processing quality, fully meeting the processing requirements of high-precision parts, and greatly improving the product yield.

[0028] The structure of the processing room of this solution can facilitate the adaptive installation of the system, with few requirements for the site. At the same time, it greatly facilitates the entry and exit of materials and personnel, and has good flexibility of use.

[0029] The constant temperature cutting fluid supply system of this scheme can not only ensure the constant temperature of the cutting fluid, but also heat or cool the cutting fluid, which can effectively adapt to the workpiece's requirements for different temperatures and has a wider range of applications.

[0030] The cutting fluid of this scheme is used as a cooling medium for cutting processing and also as a cooling medium for the spindle. Spindle cooling and cutting processing cooling use a set of systems, which is conducive to simplifying the system structure, reducing equipment costs and energy consumption, and ensuring the consistency of spindle temperature and cutting fluid temperature as much as possible.

[0031] The constant temperature cutting fluid supply system of this solution connects the venturi tube and the stock liquid barrel through a pipeline, and then connects the liquid inlet end of the stock liquid barrel to the water supply pipeline, so that water enters the venturi tube through the water supply pipeline and flows out from the liquid outlet end of the venturi tube, so that the stock liquid in the stock liquid barrel can be sucked into the venturi tube through the pipeline and mixed with water to obtain a solution of a certain concentration by using the Bernoulli principle. During the configuration process, no additional power source is required, and energy consumption is low. At the same time, the height of the solution in the solution storage barrel is measured by a liquid level meter. When the high liquid level is reached, the solenoid valve can be controlled to close by a controller to stop the configuration. The control is simple and easy to implement.

[0032] This solution uses two methods to control the flow rate of the original liquid and the flow rate of the water source to achieve concentration control. Adding a locked protection box can effectively avoid misoperation by others and ensure the stability of the device operation.

[0033] In another water supply pipeline structure, when there is no need to introduce raw liquid, the branch connected to the venturi tube can be shut off to introduce only water into the solution storage tank, thereby achieving a lower concentration and cleaning the pipeline and container, which has better application flexibility and richer functions.

[0034] The effective combination of the cutting fluid pipeline and the compressed air supply system in this solution can better clean and dry the entire system, which is beneficial to maintaining the environment in the processing chamber, reducing the difficulty of equipment maintenance and increasing its service life; and it can also adopt functions such as air cooling and purging as needed, making the application more flexible and more functional.

[0035] This solution installs exhaust equipment on the machine tool and filters the discharged water vapor through a water mist filter. On the one hand, it can effectively discharge the water vapor in the machine tool during the processing, and no water mist will appear when the door is opened, which is beneficial to improving processing efficiency and improving safety. On the other hand, it can effectively prevent pollutants in the water vapor from polluting the environment and improve environmental friendliness. In addition, through buttons and hygrometers, automatic control and manual control can be carried out as needed, and the application flexibility is good.

[0036] The processing method of this scheme can effectively keep the workpiece temperature constant at the optimal processing temperature condition by placing the workpiece statically in a processing room at a constant temperature, so that it can be combined with the control of other temperature factors to minimize the impact of the workpiece temperature and ensure the processing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] FIG1 is a front view of the present invention (the movable door is in an open state);

[0038] FIG2 is a front view of one side of the processing room of the present invention;

[0039] Figure 3 is a front view of the CNC machine tool of the present invention (in the figure the movable door is in an open state, the dotted line portion is the internal structure covered by the movable door);

[0040] Figure 4 is a schematic diagram of a first embodiment of a fixing mechanism of the present invention;

[0041] Figure 5 is a schematic diagram of a first embodiment of a fixing mechanism of the present invention;

[0042] Figure 6 It is a schematic diagram of the connection between the cooling pipe of the nozzle and the spindle and the constant temperature cutting fluid supply system of the present invention;

[0043] Figure 7 It is a schematic diagram of the cutting fluid configuration delivery pipeline area of ​​the present invention;

[0044] Figure 8 It is a partial end view of the flow regulating device area in the cutting fluid configuration delivery pipeline of the present invention;

[0045] Fig. 9 is a schematic diagram of another embodiment of the water supply pipeline of the present invention (the installation position of the concentration meter in the figure is only for reference);

[0046] Fig.10 It is a schematic diagram of the exhaust gas exhaust pipeline of the present invention;

[0047] Fig.11 It is a schematic diagram of the connection between the compressed air supply system of the present invention and the pneumatic components and the liquid supply pipeline (the nozzle and the cooling pipeline connected to the liquid outlet end of the liquid supply pipeline are hidden in the figure);

[0048] Fig.12 is a schematic diagram of a compressed air filtering device of the present invention;

[0049] Fig.13 is a cross-sectional view of the filter of the present invention.

[0050] The above drawings are merely schematic illustrations of the corresponding structures and do not fully limit the actual structure of the device. DETAILED DESCRIPTION

[0051] The purpose, advantages and features of the present invention will be illustrated and explained by the non-limiting description of the following preferred embodiments. These embodiments are only typical examples of the application of the technical solution of the present invention, and any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection claimed by the present invention.

[0052] In the description of the scheme, it should be noted that the terms "center", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Moreover, in the description of the scheme, with the operator as a reference, the direction close to the operator is the proximal end, and the direction away from the operator is the distal end.

[0053] The precision parts constant temperature processing system disclosed by the present invention is described below in conjunction with the accompanying drawings. Figure 1 As shown, it includes a processing room 1, which forms a closed space for placing various equipment in the system. The processing room 1 can be a known room with a door structure, but this room structure has certain inconveniences for the entry and exit of personnel and materials, application scenarios, assembly, etc.

[0054] Preferably, as attached Figure 2 As shown, the processing room 1 includes a roof 11, a floor 12 and a plurality of partition curtains 13 extending from the roof 11 to the floor 12 and enclosing a wall. The partition curtains 13 can be windproof curtains for various entrances. Preferably, the partition curtains 13 are PVC magnetic curtains, i.e., magnets are provided on both sides of the PVC curtains, so that a plurality of partition curtains can be stably adsorbed together, thereby reducing air leakage caused by gaps. At the same time, the partition curtains 13 can be opened relatively easily at any position, which greatly facilitates the entry and exit of personnel and materials, and makes it more convenient to use the industrial site environment for the molding of the processing room 1.

[0055] As attached Figure 1 As shown, a CNC machine tool 2 is installed in the processing room 1. The CNC machine tool 2 can be a structure of various known CNC machine tools. In a typical example, as shown in the attached Figure 3 As shown, the CNC machine tool 2 includes a processing chamber 22 with an inner cavity. The processing chamber 22 can be a structure of a cabin of a CNC machine tool of various sizes and shapes, and has a movable door 221 that can be opened and closed automatically. The movable door 221 is connected to a control device 3, and a switch button for controlling the opening and closing of the movable door 221 is provided on the control device 3.

[0056] The control device 3 can be any known control device for a CNC machine tool, such as a combination of a PLC and a main control computer. Figure 3As shown, the control device 3 may include various control buttons, keyboards, displays, indicator lights, etc., and its specific structure is a known technology and is not described here. And like many existing CNC machine tools, the control device 3 may be directly set on the processing chamber 22, or may be fixed on a mounting seat that can revolve around an axis beside the processing chamber 22. In this solution, the control device is fixed on the mounting seat.

[0057] As attached Figure 3 As shown, the processing chamber 22 is provided with various cutting processing devices, and the chip processing devices include workpiece fixing devices used to fix workpieces in various known CNC machine tools and processing structures used to perform various operations such as cutting, drilling, grinding, and punching on the workpiece.

[0058] As attached Figure 3 As shown, the processing structure includes a spindle 21 whose axis is perpendicular to the horizontal plane. The spindle 21 can be a known structure of various spindles. A tool mounting seat (not shown in the figure) for detachably mounting a tool (not shown in the figure) is provided on the bottom surface of the spindle 21. The spindle 21 at least performs lifting and self-rotation movements. The movement of the spindle 21 is realized by a spindle drive mechanism 23 connected thereto. The spindle drive mechanism 23 includes a spindle box 231 connected to the spindle 21 and transmitting the torque of the spindle drive motor (not shown in the figure) to the spindle 21 to drive its self-rotation. The spindle box 231 is connected to various known feed structures 232 that drive it to perform multi-axis movement. Of course, the spindle drive mechanism 23 can also be a structure disclosed in the prior art such as application numbers 201910092094.2, 201721104814.5, and 201711377470.X.

[0059] The main shaft 21 has a cooling pipe 211 in it, and the specific structure of the cooling pipe 211 is a known technology. For example, it can be the structure of the cooling channel disclosed in the prior art with application numbers 201811460313.X, 201110124602.4, 201811075374.4, 201780085466.8, etc., which is not limited here.

[0060] As attached Figure 3 As shown, a workpiece fixing device 24 is provided below the spindle 21, and the workpiece fixing device 24 can be any known device with a workpiece fixing structure, such as a pneumatic chuck or a pneumatic clamp, etc., and it can also be connected to a structure that drives it to move and rotate.

[0061] In the preferred structure, as shown in the attached Figure 3As shown, the workpiece fixing device 24 includes a wall-mounted support platform 241, a connecting block 242 is arranged on the support platform 241, a group of long grooves 2421 with a "convex"-shaped cross-section and parallel extension directions are recessed on the top of the connecting block 242, a positioning seat 243 is arranged on the connecting block 242, and the positioning seat 243 has a structure for placing and limiting the workpiece, for example, it has positioning pins, holes, grooves, protrusions and other structures corresponding to the workpiece (not shown in the figure), and a group of fixing mechanisms 244 are distributed on the positioning seat 243.

[0062] The fixing mechanism 244 can be any known manual fixing or automatic fixing structure. In a manual fixing method, as shown in the attached Figure 4 As shown, each of the fixing mechanisms 244 includes an L-shaped pressing block 2444, the head end of the L-shaped pressing block 2444 faces outward, and a waist-shaped hole 2445 extending along the extension direction of the horizontal portion is formed on the horizontal portion of the L-shaped pressing block 2444. A bolt 2446 located in the convex long groove of the connecting block 242 passes through the positioning seat 243 and the waist-shaped hole 2445 and is screwed to a nut 2447 located above the L-shaped pressing block 244. In an automatic fixing method, as shown in the attached Figure 5 As shown, the fixing mechanism 244 includes a rotating downward pressing cylinder 2441, the telescopic rod of which can move up and down and rotate, and its installation position can be consistent with the position of the above-mentioned support 2444. The cylinder shaft of the rotating downward pressing cylinder 2441 is provided with a pressure head 2442 facing outward, and the downward pressing surface of the pressure head 2442 is provided with a soft pad 2443, which can be, for example, soft plastic, rubber, silicone, etc., so as to effectively avoid damage to the surface of the workpiece and improve the stability of the fastening. As shown in the attached Figure 3 As shown, a nozzle 6 is provided in the processing chamber of the CNC machine tool 2, and the nozzle 6 is used to spray cutting fluid for cooling and lubrication during cutting. In a preferred embodiment, the nozzle 6 is distributed on the periphery of the spindle 21 and fixed at the bottom of the spindle box 231, so that it can move synchronously with the spindle 21 to ensure that the cutting fluid is effectively sprayed to the processing position for cooling and processing, and the nozzle of the nozzle 6 is aimed downward at the workpiece fixing device.

[0063] As attached Figure 6 As shown, the cooling pipe 211 in the nozzle 6 and the spindle 21 are connected to a constant temperature cutting fluid supply system 7 for supplying them with cutting fluid at a constant temperature, and as shown in the attached Figure 3As shown, a cutting fluid reflux chamber 25 is provided below the workpiece fixing device 24, and a top plate 251 of the cutting fluid reflux chamber 25 has a filter hole, so that the cutting fluid sprayed from the nozzle 6 can flow back into the cutting fluid reflux chamber through the top plate 251, and the cutting fluid reflux chamber is connected to the constant temperature cutting fluid supply system 7.

[0064] As attached Figure 6 As shown, the constant temperature cutting fluid supply system 7 includes a cooling heater 71, and the cutting fluid heater 71 has a structure for heating or cooling the fluid (cutting fluid) entering therein to a fixed temperature and outputting it. For example, it has a heat exchanger structure similar to an air conditioner. Its specific structure is a known technology and is not a protection point of this solution, so it will not be described here.

[0065] As attached Figure 6 As shown, the liquid inlet end of the cooling heater 71 is connected to the liquid outlet end of the reflux pump 73, and the liquid inlet end of the reflux pump 73 is connected to the reflux pipeline 76, and the reflux pipeline 76 is connected to the cutting fluid reflux chamber 25, so that the cutting fluid in the cutting fluid reflux chamber 25 can be drawn back to the cooling heater 71 for cooling and then supplied to the nozzle 6 again. The liquid outlet end of the cooling heater 71 is connected to a cutting fluid collection tank 74 located below the cooling heater 71, and the liquid outlet end of the cutting fluid collection tank 74 is connected to at least the nozzle 6 through a liquid supply pipeline 75, and the liquid supply pipeline 75 has a structure such as a pump 751 to drive the fluid flow. The reflux pump 73 and the pump 751 are both connected to the control device 3. Of course, in other embodiments, the constant temperature cutting fluid supply system 7 can also have an independent control cabinet, and various electrical components in the constant temperature cutting fluid supply system 7 are all connected to the control cabinet, and the operation of the constant temperature cutting fluid supply system 7 is controlled by the control cabinet. The specific structure and control principle of the control cabinet are known technologies and are not limited here.

[0066] As attached Figure 6 As shown, the liquid supply pipeline 75 can also be connected to the liquid inlet of the cooling channel 211 of the spindle 21, and the liquid outlet of the cooling channel 211 is connected to the circulation pipeline 77, and the circulation pipeline 77 is connected to the liquid inlet end of the reflux pump 73. Specifically, the circulation pipeline 77 can be connected to the reflux pipeline 76 through a tee, and the circulation pipeline 77 and the reflux pipeline 76 are provided with a valve body (not marked in the figure), such as a manual valve or a solenoid valve, and the valve body is close to the liquid inlet end of the pipeline, so that the cutting fluid in the spindle 21 can flow back to the cooling heater 71 for re-cooling to maintain a constant temperature.

[0067] Of course, in other embodiments, the cooling channel 211 of the spindle 21 can also be connected to an independent constant temperature cutting fluid supply pipeline, that is, it has another set of structures composed of the above-mentioned cooling heater 71, reflux pump 73, cutting fluid collection tank 74, fluid supply pipeline 75, etc., to provide cutting fluid for the cooling channel 211 of the spindle alone. At this time, water can be used instead of the cutting fluid used during cutting.

[0068] Further, as attached Figure 6 As shown, the constant temperature cutting fluid supply system 7 also includes a cutting fluid configuration delivery pipeline 72 for supplying the cutting fluid (cutting fluid) that meets the requirements to the cooling heater 71, as shown in the attached Figure 7 As shown, the cutting fluid configuration delivery pipeline 72 includes a raw liquid barrel 721, and the raw liquid barrel 721 is connected to a venturi tube 723 through a lead-out pipe 722 extending to the bottom thereof, and the liquid inlet end of the venturi tube 723 is connected to a water supply pipeline 724, and the solenoid valve 725 in the water supply pipeline 724 is connected to the control device 3 or an independent control cabinet (not shown in the figure), and the liquid outlet end of the venturi tube 723 is connected to a liquid reservoir 728 through a liquid outlet pipe 727, and a liquid level meter 729 for measuring at least a high liquid level is arranged on the top of the liquid reservoir 728, and the liquid level meter 729 is connected to the control device 3 or the control cabinet. The liquid reservoir 728 is connected to the reflux pump 73 through a pipeline 7230, so that the reflux pump 73 is connected to the cooling heater 71 to realize liquid supply. The pipeline 7230 is connected in parallel with the reflux pipeline 76, for example, the liquid inlet end of the reflux pump 73 is connected through a three-way connection, and valve bodies 7240 and 761 are respectively provided at their liquid outlet positions, which can be, for example, manual valves or solenoid valves, etc., and the opening and closing of the corresponding valve bodies can be controlled according to processing needs to realize the on-off control of the corresponding pipelines.

[0069] When the cutting fluid configuration delivery pipeline 72 is working, the solenoid valve 745 is opened by the control button on the control box or the control device 3 to allow water to enter the venturi tube 723 through the water supply pipeline 724, and the water flows out from the liquid outlet end of the venturi tube 723, so that the original liquid in the original liquid barrel 721 can be sucked into the venturi tube 723 through the lead-out pipe 722 by using the Bernoulli principle and mixed with water to obtain a solution of a certain concentration. In the configuration process, no additional power source is required, energy consumption is low, and it is easy to control.

[0070] In addition, in order to facilitate the control of the concentration of the configured solution, in one embodiment, as shown in the attached Figure 7 , Attachment Figure 8As shown, a flow regulating device 7210 is also provided on the pipeline, and the flow regulating device 7210 is located outside the raw liquid barrel 721. The flow rate can be adjusted by manually adjusting the regulating part 72101 of the flow regulating device 7210, such as a turntable, so as to adjust the outflow of the raw liquid, thereby realizing the control of the concentration of the solution finally configured.

[0071] In addition, since the flow regulating device 7210 is located outside and the concentration of the solution has a high precision requirement, it is necessary to prevent the regulating part 72101 of the flow regulating device 7210 from being misoperated by non-staff. Figure 8 As shown, the regulating part of the flow regulating device 7210 is located in the protective box 7220, and the protective box 7220 has a lock which is not shown in the figure. The lock is preferably a padlock. The protective box 7220 wraps the cover body and the cover plate. The cover plate has a hole for the installation of the flow regulating device 7210, and the side walls of the cover plate and the cover body have matching through holes for the U-shaped head of the padlock to pass through and lock. This is a known technology and will not be elaborated on.

[0072] In addition, in order to facilitate better manual control of the liquid distribution pipeline in abnormal situations, as shown in the attached Fig. 9 As shown, the water supply pipeline 724 also includes a first valve body 7241 located between the solenoid valve 725 and the venturi tube 723. The first valve body 7241 is preferably a manual valve. Under normal circumstances, the first valve body 7241 remains in a normally open state. In an abnormal situation, the water supply can be stopped by manually closing the first valve body 7241.

[0073] In another embodiment of controlling the concentration, the flow regulating device 7210 can be omitted and the concentration can be controlled by the structural design of the water supply pipeline 724, for example, Fig. 9As shown, the water supply pipeline 724 includes a third branch and a fourth branch, the third branch includes a main pipeline 7242, the main pipeline 7242 is connected to a water source, such as a faucet for supplying water, which is not shown in the figure, the solenoid valve 725 is arranged on the main pipeline 7242 or on a pipeline between the main pipeline 7242 and the water source, the main pipeline 7242 is connected to a first branch pipe 7244 through a third tee 7243, the first branch pipe 7244 is connected to the venturi tube and a second valve body 7245 is arranged thereon, the third branch also includes a second branch pipe 7246 connected to the liquid outlet end of the venturi tube, the second branch pipe 7246 has a There is a third valve body 7247 and its output end is connected to a fourth three-way 7248, one end of the fourth three-way 7248 is connected to the liquid outlet pipe 727, and the other end is connected to the third three-way 7243 through a fourth branch, the fourth branch includes a pipe 7249 connecting the third three-way 7243 and the fourth three-way 7248, the pipe 7249 is provided with a first valve body 7241, a flow control valve 72410 and a fourth valve body 72420, the first, second, third and fourth valve bodies are all solenoid valves and connected to the control device, the liquid reservoir 728 is provided with a concentration meter 7250, and the concentration meter 7250 is connected to the control device. Therefore, when dispensing, the concentration of the solution in the liquid reservoir 728 can be detected in real time by the concentration meter 7250, and the concentration of the solution can be effectively adjusted by adjusting the opening and closing of the first valve body and the flow of the second valve body.

[0074] Furthermore, in an embodiment of a fully automatic configuration, the liquid level meter 729 is preferably a high-low level meter, such as a float level meter, etc. When the high-low level meter measures that the liquid level in the reservoir 728 is at a low level, the control device 3 controls the solenoid valve 725 to open the water supply to dispense liquid, and when the liquid level in the reservoir 728 reaches a high level, the control device closes the solenoid valve 725 to stop dispensing liquid. At this time, the solution in the reservoir 728 can be transported to the corresponding usage scene through an external pipeline.

[0075] Furthermore, due to the presence of cutting fluid, a large amount of mist will be generated in the processing chamber 22 during processing. When the door of the processing chamber is opened, it often takes a certain amount of time for the mist to dissipate before manual loading and unloading operations can be performed, which affects the processing efficiency. Therefore, if the attached Fig.10As shown, the processing chamber 22 is connected to an exhaust gas exhaust pipeline 5, and the exhaust gas exhaust pipeline 5 includes an exhaust device 52 disposed on the top of the processing chamber 22. The exhaust device 52 can be various known exhaust fans and exhaust fan structures, which are known technologies and will not be described in detail here. The air inlet end of the exhaust device 52 is connected to the exhaust port 222 on the processing chamber 22 through an exhaust pipe 51. The exhaust pipe 51 is a bellows, and the two ends of the bellows are sealed and connected to the exhaust port and the air inlet end through adjustable hoops; further, in order to ensure the stability and sealing of the connection, metal rings are respectively disposed on the inner walls of the two ends of the bellows, which are not shown in the figure, and a sealing ring is disposed on the inner wall of the metal ring, which is not shown in the figure.

[0076] As attached Fig.10 As shown, the air outlet end of the exhaust device 52 is connected to a water mist filter 53. The water mist filter 53 can be any known structure capable of filtering water vapor, oil, etc. in the gas. This is a known technology, and the filter element 531 of the water mist filter 53 is preferably exposed to the outside. The water mist filter 53 discharges the filtered gas to the outside of the processing room through a pipe (not shown in the figure), thereby avoiding the exhaust gas from interfering with the temperature in the processing room.

[0077] When the control device 3 controls the exhaust device 52 to start, the gas in the processing chamber can be introduced into the water mist filter 53 through the exhaust port 12, the exhaust pipe 51, and the exhaust device 52, so as to filter out water vapor and oil emissions in the airflow.

[0078] As attached Fig.13 As shown, in order to facilitate the start and stop control of the exhaust equipment 52, a trigger signal can be generated by a control start and stop button set on the control device 3. The control device 3 controls the shutdown of the exhaust equipment 52 according to the corresponding trigger signal, and manual operation is required to trigger it.

[0079] Further, as attached Fig.10 As shown, the start and stop control of the exhaust equipment 52 can also be provided to the control device 3 through a trigger signal generated by a hygrometer 54 connected to the control device 3, and the control device 3 then controls the start and stop of the exhaust equipment 52. Specifically, when the humidity in the processing bin detected by the hygrometer 54 reaches a certain high threshold, the control device 3 starts the exhaust equipment to exhaust air, but when the hygrometer 54 detects that the humidity reaches a certain low threshold, the exhaust equipment is stopped.

[0080] The hygrometer 54 is a sensor capable of detecting humidity. Preferably, the hygrometer 54 is a temperature and humidity probe, which can monitor the temperature information in the processing chamber at the same time and display it on the display screen on the control device 3, so as to facilitate the staff to understand the temperature in the processing chamber and avoid safety accidents of equipment and staff caused by high temperature.

[0081] And, as attached Fig.13 As shown, in order to facilitate the installation of the hygrometer 54, the hygrometer 54 is preferably inserted in a magnetic seat 55, the magnetic seat 55 has a mounting hole, the temperature and humidity probe is inserted in the mounting hole, and the magnetic seat 55 is adsorbed on the inner wall of the processing chamber 22, so that the installation position of the hygrometer 54 can be easily adjusted to improve flexibility.

[0082] Furthermore, during the machining process, in addition to the spindle temperature and cutting fluid temperature affecting the machining accuracy, the temperature of the machine tool environment will also affect the machining accuracy to a certain extent. Therefore, it is necessary to effectively control the ambient temperature in the machining room 1.

[0083] Correspondingly, as attached Figure 1 As shown, the precision parts constant temperature processing system also includes an environmental constant temperature control system 8, which has a structure for maintaining a constant temperature in the processing room 1. The environmental constant temperature control system 8 can be various known central air conditioning systems or wall-mounted air conditioners or cabinet air conditioners, and the air outlet of the air conditioner is downward, so that the air flow can be blown to the CNC machine tool as soon as possible, and the temperature in the processing room 1 can be effectively controlled to be at the target temperature through the remote control or control panel of the air conditioner.

[0084] In addition, in conventional CNC machine tools 2, there is a great need for the use of compressed air. For example, pneumatic components (cylinders, pneumatic motors, etc.) of movable doors and spindle drive mechanisms, pneumatic chucks of workpiece fixing devices, etc. all need to be driven by compressed air. Therefore, it is necessary to provide a corresponding compressed air delivery system 4 for the CNC machine tool. The conventional compressed air delivery system 4 generates compressed air through an air compressor and delivers it to each pneumatic component through corresponding pipelines. However, there is often a certain amount of water vapor in the compressed air generated by the air compressor. After these water vapors enter the pneumatic components, on the one hand, the risk of rust and corrosion of the pneumatic components and gas equipment will increase. On the other hand, when there is a certain leakage in the pipeline, it will increase the water vapor in the machine tool.

[0085] Therefore, in a preferred embodiment, as shown in the attached Fig.11 As shown, the above-mentioned pneumatic components are all connected to a compressed air delivery system 4, which includes an air compressor 401 and an air supply pipeline with a filtering structure, so that the compressed air can be selectively filtered through the filtering structure of the air supply pipeline to meet different working requirements.

[0086] As attached Fig.11As shown, the compressed air supply system 4 includes an air compressor 401, and the air supply pipeline with a filtering structure includes a pipe 402 connected to the air compressor 401, the pipe 402 is connected to the air inlet end of a compressed air filter device 403, the air outlet end of the compressed air filter device 403 is connected to the air distribution pipeline 404, and the air distribution pipeline 404 is connected to the above-mentioned pneumatic components.

[0087] As attached Fig.12 As shown, the compressed air filtering device 403 includes a first filter 41 and a second filter 410, and a first branch and a second branch are arranged between the first filter and the second filter. The gas in the first branch does not pass through the dryer, and the gas in the second branch passes through the dryer. The first branch and the second branch can be turned on and off respectively, and the solenoid valves controlling the on and off of the first branch and the second branch are both connected to the control device 3. Of course, the compressed air delivery system 4 may also have an independent control cabinet, which connects the electrical components in the system 4 and controls the operation of the corresponding electrical components. The control cabinet here is a known technology and will not be described in detail.

[0088] As attached Fig.12 As shown, the first filter 41 is connected to the first pipe 43 and the second pipe 44 through the first tee 42, the first pipe 43 is provided with a first solenoid valve 45 and is connected to the air inlet end of a dryer 46, the second pipe 44 is provided with a second solenoid valve 47 and is connected to the second tee 48, the second tee 48 is connected to the air outlet end of the dryer 46 and connected to at least one level of the second filter 410 through a third pipe 7249, the third pipe 7249 is provided with a third solenoid valve 420, the first solenoid valve 45, the second solenoid valve 47 and the third solenoid valve 420 are all connected to the control device 3, and are controlled on and off by the controller, and the control device 3 specifically controls their operation according to the humidity in the processing chamber 22.

[0089] For example, when the second solenoid valve 47 is opened and the first solenoid valve 45 and the third solenoid valve 420 are closed, if the humidity in the processing chamber 22 still meets the standard, the air supply is maintained in this state; on the contrary, when the humidity does not meet the standard, the control device 3 closes the second solenoid valve 47 and opens the first solenoid valve 45 and the third solenoid valve 420. Of course, the first solenoid valve and the second solenoid valve can also be manual valves such as gate valves.

[0090] The various components of the compressed air supply system of this solution are effectively integrated, so that the overall structure of the system is greatly reduced, and it is suitable for various industrial environments. The overall structure is small and compact, does not require a large number of storage tanks, and has low cost. At the same time, by setting two parallel pipelines, one passes through the dryer and the other does not pass through the dryer, it is possible to choose whether to let the compressed gas pass through the dryer according to the actual dryness requirements, and the application flexibility is good.

[0091] The first filter 41 and the second filter 410 have the same structure, and they can be various known feasible gas filters. In the preferred structure, the first filter 41 is taken as an example for explanation.

[0092] As attached Fig.13 As shown, the first filter 41 includes a shell 411 with a cavity inside, the shell 411 is columnar as a whole, and its upper part is square and the lower part is cylindrical, and a coaxial air inlet interface 412 and an air outlet interface 413 are formed on the shell 411, and the air inlet interface 412 and the air outlet interface 413 are located in the upper part of the shell 411 and close to the top, and the inner end of the outlet end of the air inlet interface 412 faces an arc-shaped air bleed hood 414, so that the gas entering from the air inlet interface 412 can move downward along the air bleed hood 414 to make the air flow smoother, reduce the air flow turbulence caused by resistance, and at the same time increase the flow rate of the air flow to improve efficiency.

[0093] As attached Fig.13 As shown, the lower end of the air bleed cover 414 and a partition 415 divide the housing 411 cavity into a filter chamber 416 and an air outlet chamber 417 isolated from each other. The filter chamber 416 is isolated by the partition 415 and a bottom plate 418 parallel to the partition 415. A filter element 419 is coaxially arranged on the bottom plate 418. The filter element 419 can be various known filter element structures. This is a known technology and is not limited thereto. The filter element 419 is connected to the inner surface of the housing 411. The wall maintains a gap, so that the gas entering the filter chamber 416 can enter from the periphery of the filter element 419 for filtration, and the gas outlet end of the filter element 419 is connected with the gas outlet chamber 417. Specifically, a through hole connected with the gas outlet end of the filter element 419 is formed on the partition plate 415, and the gas outlet chamber 417 is connected with the gas outlet interface 413, so that the gas filtered by the filter element 419 can enter the gas outlet chamber 17 through the through hole and be discharged from the gas outlet interface 413. The waste discharge end of the filter element 419 is connected with the waste discharge chamber 4110 of the filter element 415, that is, a through hole corresponding to the waste discharge end of the filter element 419 is formed on the bottom plate 418, so that the waste liquid filtered by the filter element 419 can enter the waste discharge chamber 410 through the through hole and be discharged outside the first filter 41.

[0094] Further, as attached Fig.12As shown, the discharge ends of the first filter 41 and the second filter 410 are respectively connected to a liquid outlet pipe 430, and the liquid outlet pipe 430 is connected through a tee 440, and the tee 440 is connected to a drain pipe 450, and the drain pipe 450 is connected to the liquid collecting tank of the dryer (not shown in the figure); when there are multiple second filters 410, the discharge ends of multiple second filters 410 can be connected through additional pipes and tees to form a pipeline system with multiple parallel drainage branches.

[0095] The first tee 42 and the second tee 48 can be tee joints of various known shapes and materials, such as T-shaped, Y-shaped metal or plastic tee joints, preferably T-shaped metal tee joints, and each interface of the tee joint has an internal thread to facilitate disassembly and assembly of the pipeline.

[0096] The first pipe 43, the second pipe 44, and the third pipe 49 can be any known pipe material capable of conveying fluids, such as a round pipe, a square pipe, etc., and can be a plastic pipe or a metal pipe, preferably a metal pipe, and both ends of each pipe have an external thread corresponding to the internal thread on the three-way interface. Further preferably, the second pipe 44 is a flexible pipe, so that it can be easily installed when connecting the pipes, and the stability of the overall structure is not affected.

[0097] The dryer 46 can be any known gas drying device, for example, the dryer 6 can be a refrigeration dryer or an adsorption dryer, which are known technologies and will not be described in detail. In a preferred shape, the dryer 46 has a rectangular shell. Further, in order to facilitate the monitoring of the air supply flow, as shown in the attached Fig.12 As shown, a flow regulator 460 is connected to the air outlet of the second filter 410. The flow regulator can be a mass flow controller, a flow regulating valve, etc. The specific structure of the flow regulator 460 is a known technology and will not be described in detail.

[0098] In addition, in a preferred embodiment, as shown in the attached Fig.11 As shown, the nozzle 6 is not only connected to the cutting fluid supply pipeline, but also connected to the air distribution pipeline 404 of the above-mentioned compressed air supply system, that is, the air distribution pipeline 404 also has a path 4041 connected to the nozzle 6, so that in a feasible manner, after the processing is completed, only clean water can be supplied to the nozzle through the constant temperature cutting fluid supply system 7, so as to clean the entire pipeline and the inside of the processing chamber, and after the cleaning is completed, compressed air can be sprayed into the processing chamber through the nozzle 6, so that the processing chamber can be dried as soon as possible, effectively improving the use environment and life of the equipment.

[0099] In the whole system, if the valve bodies are solenoid valves, they are all connected to the control device 3 or the control cabinet or control box of the corresponding system, so that automatic control can be achieved.

[0100] The processing method of the above-mentioned precision parts constant temperature processing system comprises the following steps:

[0101] S1, turn on the environmental constant temperature control system 8 to keep the temperature in the processing room 1 constant at the target temperature, for example, to keep the temperature in the processing room 1 stable at 25°C.

[0102] S2, place the workpiece in the processing room for 4-6 hours. Under the stable temperature environment in the processing room 1, the temperature of the workpiece is matched with the temperature in the processing room through heat transfer, and the long-term static state can keep the internal and external temperatures of the workpiece consistent, avoiding the reduction of processing accuracy due to the internal and external temperature difference of the workpiece itself.

[0103] S3, placing the workpiece of step S2 on the positioning seat of the CNC machine tool, and fixing the workpiece by the fixing mechanism 244.

[0104] S4, the CNC machine tool is turned on to process the workpiece by moving the tool on the spindle 21. At the same time, before or after the spindle 21 is started, the pump of the constant temperature cutting fluid supply system 7 is started to provide constant temperature cutting fluid to the nozzle 6 and the cooling pipeline. The cutting fluid sprayed from the nozzle 6 cools and lubricates the contact position between the tool and the workpiece, and then falls into the cutting fluid reflux chamber. After returning to the cooling heater through the reflux pipeline, it is cooled or heated to the required constant temperature, and then enters the liquid supply pipeline to be supplied to the nozzle and the cooling pipeline. After entering the cooling pipeline, the cutting fluid cools the spindle in real time, so that the spindle maintains a constant temperature to avoid interference with the processing accuracy caused by overheating. After the cutting fluid in the cooling pipeline flows out, it returns to the cooling heater through the circulation pipeline to restore to a constant temperature again.

[0105] After processing, the branch through the Venturi tube can be shut off so that only clean water is supplied, and the entire pipeline and the processing chamber can be cleaned with clean water. After cleaning, compressed gas can be supplied to the nozzle through the compressed air supply system for air drying, or it can be cooled by air cooling or the workpiece fixing device can be purged by blowing.

[0106] There are many implementation methods of the present invention, and all technical solutions formed by equivalent transformation or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A processing method for a constant temperature processing system for precision parts, Features: The precision parts constant temperature processing system comprises a processing room (1) forming a closed space; A numerically controlled machine tool (2), located in the processing room (1), having a rotatable and movable main shaft (21), wherein a cooling pipe is provided in the main shaft (21); A constant temperature cutting fluid supply system (7) connected to the cooling pipes in the nozzle (6) and the spindle (21) in the CNC machine tool (2), and having a structure for supplying cutting fluid at a constant temperature to the nozzle and the spindle; An environmental constant temperature control system (8) having a structure for maintaining a constant temperature in the environment of the processing room (1); The processing room (1) comprises a roof (11), a floor (12), and a plurality of partition curtains (13) extending from the roof (11) to the floor (12) and forming a wall; The numerically controlled machine tool (2) comprises a processing chamber (22) having an inner cavity, a spindle (21) and a spindle driving mechanism (23) for driving the spindle (21) to lift and rotate are arranged in the processing chamber (22), a workpiece fixing device (24) is arranged below the spindle (21), a cutting fluid reflux chamber (25) is arranged below the workpiece fixing device (24), and a top plate of the cutting fluid reflux chamber (25) has a filtering hole; The constant temperature cutting fluid supply system (7) comprises a cooling heater (71), the liquid inlet end of the cooling heater (71) is connected to a reflux pump (73), and the liquid outlet end thereof is connected to a cutting fluid collecting tank (74); the liquid inlet end of the reflux pump (73) is connected to a cutting fluid reflux chamber (25) of the numerically controlled machine tool (2) via a reflux pipeline (76), and the cutting fluid collecting tank (74) is connected to the nozzle (6) via a liquid supply pipeline (75) with a pump; The liquid supply pipeline (75) is also connected to the cooling pipeline (211), and the cooling pipeline (211) is connected to the liquid inlet end of the reflux pump (73) via a circulation pipeline (77); The nozzle (6) is arranged around the main shaft and moves synchronously with the main shaft, with the nozzle facing the workpiece fixing device; The constant temperature cutting fluid supply system (7) further comprises a cutting fluid configuration delivery pipeline (72) for supplying cutting fluid to the cooling heater (71), the cutting fluid configuration delivery pipeline comprising a raw liquid barrel (721), the raw liquid barrel (721) being connected to a venturi tube (723) via an outlet pipe (722), the liquid inlet end of the venturi tube (723) being connected to a water supply pipeline (724), the liquid outlet end of the venturi tube (723) being connected to a liquid reservoir (728) via a liquid outlet pipe (727), and the liquid reservoir (728) being connected to the liquid inlet end of the reflux pump (73); The water supply pipeline (724) comprises two branches, wherein the fluid in one branch does not pass through the Venturi tube (723), and the fluid in the other branch passes through the Venturi tube (723); The processing chamber is connected to an exhaust gas exhaust pipeline (5), the exhaust gas exhaust pipeline (5) comprises an exhaust pipe (51) connected to an air outlet on the processing chamber, the exhaust pipe (51) is connected to an exhaust device (52) located outside the processing chamber, the exhaust device (52) is connected to a water mist filter (53), and the exhaust device is started and stopped by a signal sent to a control device by a control button or a hygrometer (54); It also includes a compressed air delivery system (4), the compressed air delivery system (4) including an air compressor (401), the air supply pipeline with a filtering structure including a pipe (402) connected to the air compressor (401), the pipe (402) connected to an air inlet end of a compressed air filter device (403), the air outlet end of the compressed air filter device (403) connected to an air distribution pipeline (404), and the air distribution pipeline (404) connected to various pneumatic components; The compressed air filtering device (403) comprises a first filter (41) and a second filter (410), a first branch and a second branch are provided between the first filter and the second filter, the gas in the first branch does not pass through the dryer, the gas in the second branch passes through the dryer, the first branch and the second branch are respectively turned on and off, and the solenoid valves controlling the on and off of the first branch and the second branch are both connected to the control device (3); The first filter (41) is connected to the first pipe (43) and the second pipe (44) via a first tee (42); the first pipe (43) is provided with a first solenoid valve (45) and is connected to the air inlet of the dryer (46); the second pipe (44) is provided with a second solenoid valve (47) and is connected to the second tee (48); the second tee (48) is connected to the air outlet of the dryer (46) and to the first-stage second filter (410) via a third pipe (49); the third pipe (49) is provided with a third solenoid valve (420); the first solenoid valve (45), the second solenoid valve (47) and the third solenoid valve (420) are all connected to the control device (3) and are controlled on and off by the controller; The first filter (41) comprises a shell (411) having a cavity therein, the shell (411) being in the shape of a column as a whole, and having a square upper portion and a cylindrical lower portion, the shell (411) being formed with a coaxial air inlet interface (412) and an air outlet interface (413), the air inlet interface (412) and the air outlet interface (413) being located at the upper portion of the shell (411) and close to the top, the inner end of the outlet end of the air inlet interface (412) being directly opposite to an arc-shaped air bleed cover (414), so that the gas entering from the air inlet interface (412) can move downward along the air bleed cover (414); The lower end of the air bleed hood (414) and a partition (415) divide the housing (411) cavity into a filter chamber (416) and an air outlet chamber (417) that are isolated from each other. The filter chamber (416) is isolated by the partition (415) and a bottom plate (418) parallel to the partition (415). A filter element (419) is coaxially arranged on the bottom plate (418), and a gap is maintained between the filter element (419) and the inner wall of the housing (411). A through hole communicating with the air outlet end of the filter element (419) is formed on the partition (415). The air outlet chamber (417) is communicated with the air outlet interface (413). A through hole corresponding to the waste discharge end of the filter element (419) is formed on the bottom plate (418). The steps include: S1, turning on the environmental constant temperature control system to keep the temperature in the processing room (1) constant at a target temperature; S2, placing the workpiece in the processing room for 4-6 hours to match the temperature of the workpiece with the temperature in the processing room; S3, placing the workpiece in step S2 in a CNC machine tool and fixing it; S4, the CNC machine tool starts processing, and the constant temperature cutting fluid supply system provides constant temperature cutting fluid to the nozzle and the cooling pipe. The cutting fluid sprayed by the nozzle (6) cools and lubricates the contact position between the tool and the workpiece, and then falls into the cutting fluid return chamber. After returning to the cooling heater through the return pipe, it is cooled or heated to the required constant temperature, and then enters the supply pipe to supply to the nozzle and the cooling pipe. After the cutting fluid enters the cooling pipe, it cools the spindle in real time, so that the spindle maintains a constant temperature, avoiding interference with the processing accuracy caused by overheating. After the cutting fluid in the cooling pipe flows out, it returns to the cooling heater through the circulation pipe and recovers to a constant temperature again.

2. The processing method of the precision parts constant temperature processing system according to claim 1, Features: The hygrometer (54) is a temperature and humidity probe, which monitors the temperature information in the processing chamber and displays it on a display screen on the control device (3). The hygrometer (54) is plugged into a magnetic seat (55). The magnetic seat (55) has a mounting hole. The temperature and humidity probe is plugged into the mounting hole. The magnetic seat (55) is adsorbed on the inner wall of the processing chamber (22), thereby adjusting the mounting position of the hygrometer (54).

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