Temperature-controlled coolant supply system for grinding machines

Abstract

The present invention discloses a temperature-controlled coolant supply system for grinding machines, intended for use with at least one grinding machine, comprising a liquid storage tank, a cooling tank, a magnetic separator, a first pump, a heat exchanger, a second pump, a multi-stage centrifugal filter, and a first distribution pipe, wherein the liquid storage tank is continuously connected to the grinding machine and serves to receive coolant, the cooling tank is arranged in a manner compatible with the liquid storage tank and serves to receive the coolant, the magnetic separator is arranged in a manner compatible with the cooling tank and serves to filter the coolant, the first pump draws the coolant from the liquid storage tank to the magnetic separator, and the heat exchanger performs a heat exchange with the coolant located in the cooling tank.The second pump is attached to the cooling tank and connected to the grinding machine via a first pipeline. The multi-stage centrifugal filter for filtering the flowing coolant is connected in series with the first pipeline, and the first distribution pipe for diverting the coolant to the liquid storage tank is connected laterally to the first pipeline. With the above components, after heat exchange between the heat exchanger and the cooling tank, the coolant can be quickly supplied to the grinding machine, thus preventing a temperature increase caused by an excessively long path.

Description

Field of invention

[0001] The present invention relates to the technical field of coolant treatment and in particular to a temperature-controlled coolant supply system for grinding machines. State of the art

[0002] Grinding machines available on the market are typically used to treat the surface of products. During operation, it is necessary to use coolant to protect both the products and the machine. This coolant can be recycled and reused via the circulation system to avoid waste and environmental pollution.

[0003] German patent application DE 34 29 965 A1 describes a grinding machine comprising a grinding head, at least one coolant outlet nozzle associated with the grinding head, and a coolant circulation system. This system includes a coolant tank, a coolant supply line from the tank to the outlet nozzle, a return line for returning the coolant exiting the nozzle to the tank, and a pump for maintaining coolant circulation from the tank to the outlet nozzle and back. A temperature control device is provided along the coolant supply line to regulate the temperature of the coolant flowing in the line to a predetermined value. German patent application US 9,381,574 B1 describes a device and a method for machining a superhard substrate.This includes a device for pre-cooling a non-aqueous cutting fluid to form a subcooled cutting fluid, a capillary tube injector that saturates the subcooled cutting fluid with solid and gaseous carbon dioxide, an inline static mixer for combining the subcooled cutting fluid and the solid and gaseous carbon dioxide, a spray application tool for applying the carbon dioxide-saturated subcooled cutting fluid to the substrate during a machining process, and a recovery device for collecting the remaining cutting fluid from the machined substrate.

[0004] The coolant circulation system for grinding machines is described in detail in Japanese patents JP6754487, JP6754486, and JP6715382. As in Fig. As shown in Figure 2, it primarily comprises a storage tank unit 91, a magnetic filter unit 92, a cooling unit 93 and a second liquid suction pump 94.

[0005] The storage container unit 91 comprises a storage container 911 continuously connected to a grinding machine S and a stirring device 912 arranged in accordance with the storage container 911, wherein the storage container 911 receives the cooling fluid (not shown) and grinding chips (not shown) dispensed (used) by the grinding machine S.

[0006] The magnetic filter unit 92 comprises a filter container 921 continuously connected to the storage container 911, a magnetic filter 922 arranged in accordance with the filter container 921 and a first liquid suction pump 923, which draws the liquid from the storage container 911 to the magnetic filter 922.

[0007] The cooling unit 93 comprises a heat exchanger tank 931 and a heat exchanger 932.

[0008] The second liquid suction pump 94 draws the liquid from the filter container 921 and directs it to the heat exchanger container 931 or to the grinding machine S, with a filter 95 arranged on the guide path to the grinding machine S.

[0009] In this conventional coolant circulation system, the cooling method consists of the heat-exchanged coolant flowing into the storage tank 911 beforehand, and then the coolant in the storage tank 911 being cooled by means of the cooling unit 93.

[0010] The first liquid suction pump 923 then draws the liquid from the storage tank 911 to the magnetic filter 922. After filtration by the magnetic filter 922, the coolant collected in the filter tank 921 is cooled.

[0011] Finally, the coolant is drawn from the filter container 921 by the second liquid suction pump 94, passed through the filter 95 and then directed to the grinding machine S.

[0012] The state-of-the-art operating method has some shortcomings, such as:

[0013] 1. Inaccurate temperature control: The heat-exchanged coolant must travel a long and multi-stage path before reaching the grinding machine S. This process inevitably leads to temperature loss and heating, making it impossible to control the coolant temperature when it reaches the grinding machine S.

[0014] 2. Ineffective heat exchange: After heat exchange in the cooling unit 93, the coolant flows into the storage tank 911. If the coolant in the storage tank 911 stagnates for a longer period of time, it exchanges heat with the ambient air and warms up again.

[0015] Furthermore, a stirring process is regularly carried out in the storage container 911 by the stirring device 912, which further increases the heat exchange with the ambient air.

[0016] When the storage tank 911 receives the coolant and grinding chips dispensed by the grinding machine S, it automatically receives the accompanying heat source, which increases the temperature of the coolant in the storage tank 911.

[0017] 3. Energy waste (1): The second liquid intake pump 94 draws the coolant located in the filter tank 921 to the grinding machine S. However, the filter tank 921 is located at the end of the heat exchange sequence, which means that most of the coolant exchanged by means of the cooling unit 93 is lost along the way or used for pre-cooling.

[0018] 3. Energy waste (2): To prevent the grinding chips from settling at the bottom of the storage container 911, additional energy is required to drive the agitator 912 to stir so that the grinding chips are suspended in the coolant.

[0019] To shorten the path, reduce energy consumption and the area occupied, etc., an improvement of the conventional temperature-controlled coolant supply system for grinding machines is required. Object of the invention

[0020] The invention is based on the objective of providing a temperature-controlled coolant supply system for grinding machines, which eliminates the aforementioned problems and shortcomings of the prior art.

[0021] To solve the above problem, the present invention provides a temperature-controlled coolant supply system according to independent claim 1 for grinding machines, which is intended for use with at least one grinding machine S and comprises a liquid storage tank, a cooling tank, a magnetic separator, a first pump, a heat exchanger, a second pump, a multi-stage centrifugal filter and a first distribution pipe, wherein the liquid storage tank is continuously connected to the grinding machine and serves to receive a coolant, the cooling tank is arranged in a manner compatible with the liquid storage tank and serves to receive the coolant, the magnetic separator is arranged in a manner compatible with the cooling tank and serves to filter the coolant, and the first pump draws the coolant from the liquid storage tank to the magnetic separator.The heat exchanger performs heat exchange with the coolant in the cooling tank. The second pump is attached to the cooling tank and connected to the grinding machine via a first pipeline. The multi-stage centrifugal filter for filtering the flowing coolant is connected in series with the first pipeline, and the first distribution pipe for diverting the coolant to the liquid storage tank is connected laterally to the first pipeline. With the above components, after the heat exchange between the heat exchanger and the cooling tank, the coolant can be quickly supplied to the grinding machine, thus preventing a temperature increase caused by an excessively long path. Brief description of the drawing Fig. Figure 1 shows a schematic representation of the system of an embodiment according to the present invention; Fig. Figure 2 shows a schematic representation of a conventional temperature-controlled coolant supply system. Detailed description of the exemplary embodiment

[0022] The cutting fluid supply system according to the invention is described in detail below using an exemplary embodiment with reference to the figures. The components of the present invention mentioned in this exemplary embodiment are not necessarily shown to scale with regard to their proportions, dimensions, and amounts of deformation and displacement, but only schematically. In the exemplary embodiment, identical and symmetrical components are shown with the same reference numerals. The directional terms used below, such as "front, back, left, right, top, bottom, inside, and outside" in the description of the exemplary embodiment, are shown in the figure according to the direction indicated and should not be interpreted as a limitation of the present invention.

[0023] It will be on Fig.1 Reference is made to the inventive temperature-controlled coolant supply system for grinding machines, which is intended for use with at least one grinding machine S and comprises a liquid storage tank 11, a cooling tank 12, a magnetic separator 13, a first pump 14, a heat exchanger 932, a second pump 15, a first filter unit 20, a first stirring unit 30, a second stirring unit 40, a third stirring unit 50, a second filter unit 60 and a fourth stirring unit 70.

[0024] The liquid storage container 11 serves to receive the coolant and grinding chips dispensed (used) by the grinding machine S.

[0025] The cooling tank 12 is selectively and continuously connected to the liquid storage tank 11.

[0026] The magnetic separator 13 is arranged in accordance with the cooling tank 12 and provides a magnetic attraction force to attract the magnetic chips (e.g. grinding chips) contained in the cooling liquid.

[0027] The first pump 14 is arranged to match the liquid storage tank 11 and draws coolant from the liquid storage tank 11 to the magnetic separator 13.

[0028] The heat exchanger 932 is arranged to match the cooling tank 12 and selectively performs a heat exchange with the coolant located in the cooling tank 12.

[0029] The second pump 15 is attached to the cooling tank 12 and connected to the grinding machine S by means of a first pipe 151, whereby the cooling tank 12 supplies the liquid to the grinding machine S via the first pipe 151.

[0030] The first filter unit 20 is connected in series with the first pipeline 151 and performs centrifugal filtration of the cooling fluid flowing through it in order to further purify the cooling fluid conveyed via the first pipeline 151, wherein the first filter unit 20 comprises a multi-stage centrifugal filter 21 and a first drain valve 22.

[0031] The multi-stage centrifugal filter 21 generates centrifugal force at different flow velocities, such as high, medium and low flow velocities.

[0032] The first drain valve 22 is connected in series with the drain end of the multi-stage centrifugal filter 21 to allow manual operation by the user to remove the residues filtered out of the multi-stage centrifugal filter 21. Alternatively, the first drain valve 22 can be electronically controlled to provide the advantage of automatic draining at predetermined times.

[0033] The first stirring unit 30 is connected laterally to the first pipeline 151 located between the second pump 15 and the multi-stage centrifugal filter 21, selectively diverts the cooling liquid located in the first pipeline 151 and directs it back to the liquid storage tank 11, thereby stirring the cooling liquid located in the liquid storage tank 11.

[0034] The first stirring unit 30 comprises a first distribution pipe 31, a first control valve 32 and a first nozzle 33.

[0035] One end of the first distribution pipe 31 is connected to the first pipeline 151 and the other end is arranged to match the liquid storage tank 11.

[0036] The first control valve 32 is connected in series at a predetermined position of the first distribution pipe 31, whereby the cross-section of the first distribution pipe 31 can be selectively closed.

[0037] The first nozzle 33 is connected in series with one end of the first distributor pipe 31 to increase the kinetic energy of the coolant discharged in the first distributor pipe 31.

[0038] The second stirring unit 40 is connected laterally to the first pipeline 151 located between the multi-stage centrifugal filter 21 and the grinding machine S, selectively diverts the cooling liquid located in the first pipeline 151 and directs it back to the liquid storage tank 11, thereby stirring the cooling liquid located in the liquid storage tank 11.

[0039] The second mixing unit 40 comprises a second distribution pipe 41, a second control valve 42 and a second nozzle 43.

[0040] One end of the second distribution pipe 41 is connected to the first pipeline 151 and the other end is arranged to match the liquid storage tank 11.

[0041] The second control valve 42 is connected in series at a predetermined position of the second distribution pipe 41, making it possible to selectively close the cross-section of the second distribution pipe 41.

[0042] The second nozzle 43 is connected in series with one end of the second distributor pipe 41 to increase the kinetic energy of the coolant discharged in the second distributor pipe 41.

[0043] The third stirring unit 50 is connected to the second pump 15 and arranged in accordance with the cooling tank 12, selectively diverts the cooling liquid drawn in by the first pump 14 and directs it back to the cooling tank 12, thereby stirring the cooling liquid in the cooling tank 12.

[0044] The third stirring unit 50 comprises a third distribution pipe 51, a third control valve 52 and a third nozzle 53.

[0045] One end of the third distribution pipe 51 is connected to the second pump 15 and the other end is arranged to match the cooling tank 12.

[0046] The third control valve 52 is connected in series at a predetermined position of the third distribution pipe 51, making it possible to selectively close the cross-section of the third distribution pipe 51.

[0047] The third nozzle 53 is connected in series with one end of the third distributor pipe 51 to increase the kinetic energy of the coolant discharged in the third distributor pipe 51.

[0048] The second filter unit 60 is connected to the second pump 15 and the grinding machine S and serves to filter the coolant drawn from the cooling tank 12, pressurizes it and then supplies it to the grinding machine S and comprises a second pipeline 61, a centrifugal filter 62, a third pump 63 and a second drain valve 64.

[0049] The two ends of the second pipeline 61 are each connected to the second pump 15 and the grinding machine S.

[0050] The centrifugal filter 62 is connected in series at a predetermined position of the second pipeline 61 in order to filter the cooling fluid conveyed via the second pipeline 61.

[0051] The third pump 63 is connected in series with the second pipeline 61 located between the centrifugal filter 62 and the grinding machine S and works together with the second pump 15 in operation to pressurize the cooling fluid located in the second pipeline 61.

[0052] The second drain valve 64 is connected in series with the drain end of the centrifugal filter 62 to allow manual operation by the user to remove the residues filtered out of the centrifugal filter 62. Alternatively, the second drain valve 64 can be electronically controlled to provide the advantage of automatic draining at predetermined times.

[0053] The fourth stirring unit 70 is connected to the second pipeline 61 located between the second filter unit 60 and the grinding machine S, interacts with the liquid storage tank 11, selectively diverts the cooling liquid located in the second pipeline 61 and returns it to the liquid storage tank 11, thereby stirring the cooling liquid located in the liquid storage tank 11.

[0054] The fourth stirring unit 70 comprises a fourth distributor pipe 71, a fourth control valve 72 and a fourth nozzle 73.

[0055] One end of the fourth distribution pipe 71 is connected to the second pipeline 61 and the other end is arranged to match the liquid storage tank 11.

[0056] The fourth control valve 72 is connected in series at a predetermined position of the fourth distributor pipe 71, making it possible to selectively close the cross-section of the fourth distributor pipe 71.

[0057] The fourth nozzle 73 is connected in series with one end of the fourth distributor tube 71 to increase the kinetic energy of the coolant discharged in the fourth distributor tube 71.

[0058] The above is an introduction to the various components and assembly methods of the temperature-controlled coolant supply system for grinding machines according to a preferred embodiment of the present invention. The operating characteristics of this embodiment of the present invention are described below.

[0059] In this implementation, the heat exchanger 932 only needs to perform a heat exchange with the coolant located in the cooling tank 12, whereby the coolant in the cooling tank 12 is supplied to the grinding machine S after the heat exchange by means of the second pump 15. Therefore, the temperature of the coolant can be precisely controlled within the specified range.

[0060] If the grinding machine S requires coolant, the first filter unit 20 can be used to provide a coolant with high purity but low pressure. Alternatively, the second filter unit 60 can be used to provide a coolant with lower purity than the first filter unit 20, but high pressure (in conjunction with the third pump 63), so that different coolants can be used for the grinding machine S.

[0061] Furthermore, the liquid storage tank 11 receives the coolant and grinding chips dispensed by the grinding machine S. Due to the low flow velocity, the suspended solids in the coolant easily settle at the bottom of the liquid storage tank 11, and adhering contaminants readily form on the tank's walls. By activating the first stirring unit 30, the second stirring unit 40, the fourth stirring unit 70, or a combination thereof, the specified coolant is directed to the liquid storage tank 11. This stirs the coolant accumulated in the liquid storage tank 11, thereby agitating and suspending the sediment and rinsing and cleaning the tank's walls to improve the filtration efficiency of the magnetic separator 13.

[0062] In addition to the liquid storage tank 11, the cooling liquid can also be diverted to the cooling tank 12 by operating the third stirring unit 50 in order to clean the cooling tank 12 and to ensure that the wall of the cooling tank 12 remains clean.

[0063] The foregoing description represents only a preferred embodiment of the invention and is not intended to limit the scope of the claims. All equivalent changes and modifications that can be made by a person skilled in the art in this field according to the description and drawings of the invention are within the scope of protection of the present invention. Reference symbol list 11 liquid storage containers 12 cooling containers 13 magnetic separators 14 first pump 15 second pump 151 first pipeline 20 first filter unit 21 multi-stage centrifugal filters 22 first drain valve 30 first stirring unit 31 first distribution pipe 32 first control valve 33 first nozzle 40 second stirring unit 41 second distribution pipe 42 second control valve 43 second nozzle 50 third stirring unit 51 third distribution pipe 52 third control valve 53 third nozzle 60 second filter unit 61 second pipeline 62 centrifugal filters 63 third pump 64 second drain valve 70 fourth stirring unit 71 fourth distribution pipe 72 fourth control valve 73 fourth nozzle<Stand der Technik> 91 Storage container unit 911 storage tanks 912 Mixer 92 magnetic filter unit 921 filter containers 922 Magnetic filters 923 first liquid suction pump 93 Cooling unit 931 Heat exchanger tank 932 heat exchangers 94 second liquid suction pump 95 filters S grinding machine

Claims

[1] Temperature-controlled coolant supply system for grinding machines, intended for use with at least one grinding machine (S) and comprising the following: a liquid storage container (11) which is continuously connected to the grinding machine (S) and serves to receive a cooling liquid; a cooling container (12) which is arranged in accordance with the liquid storage container (11) and serves to hold the cooling liquid; a magnetic separator (13) which is arranged in accordance with the cooling tank (12) and serves to filter the cooling fluid flowing through it; a first pump (14) which is arranged in accordance with the liquid storage tank (11) and draws the coolant from the liquid storage tank (11) to the magnetic separator (13); a heat exchanger (932); a second pump (15) which is attached to the cooling tank (12) and connected to the grinding machine (S) by means of a first pipeline (151); a multi-stage centrifugal filter (21) connected in series at a predetermined position of the first pipeline (151); characterized by , that the heat exchanger (932) performs a heat exchange with the coolant located in the cooling reservoir (12); and that the coolant supply system includes the following: a first distribution pipe (31), one end of which is connected laterally to the first pipeline (151) and is located between the multi-stage centrifugal filter (21) and the second pump (15), and the other end of which is arranged in accordance with the liquid storage tank (11) and diverts the cooling liquid located in the first pipeline (151) to the liquid storage tank (11), thereby stirring it, wherein the drain end of the multi-stage centrifugal filter (21) is connected in series to a first drain valve (22), wherein the first drain valve (22) is either manual or electronic, wherein the first pipeline (151) is laterally connected to a second distribution pipe (41) and is located between the multi-stage centrifugal filter (21) and the grinding machine (S), wherein the other end of the second distribution pipe (41) is arranged in accordance with the liquid storage tank (11), wherein the second distribution pipe (41) is connected in series to a second control valve (42), wherein the outlet end of the second pump (15) is connected to a third distribution pipe (51), wherein one end of the third distribution pipe (51) is arranged to match the cooling tank (12), in which the third distribution pipe (51) is connected in series with a third control valve (52), wherein the output end of the second pump (15) is connected to a second filter unit (60) connected to the grinding machine (S), the second filter unit (60) comprising the following: a second pipeline (61), both ends of which are connected to the second pump (15) and the grinding machine (S); a centrifugal filter (62) connected in series at a predetermined position of the second pipe (61); and a third pump (63) which is connected in series with the second pipeline (61) located between the centrifugal filter (62) and the grinding machine (S) and which works in conjunction with the operation of the second pump (15) to pressurize the coolant located in the second pipeline (61). [2] Temperature-controlled coolant supply system for grinding machines according to claim 1, wherein the drain end of the centrifugal filter (62) is connected in series with a second drain valve (64), wherein the second drain valve (64) is either manual or electronic. [3] Temperature-controlled coolant supply system for grinding machines according to claim 1, wherein the second pipeline (61) is connected laterally to a fourth distribution pipe (71), wherein one end of the fourth distribution pipe (71) is arranged to match the liquid storage container (11). [4] Temperature-controlled coolant supply system for grinding machines according to claim 3, wherein the fourth distributor pipe (71) is connected in series with a fourth control valve (72).

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