Lathe bed cooling structure and machine tool

Abstract

The invention relates to a lathe bed cooling structure and a machine tool, and relates to the technical field of machine tools. The lathe bed cooling structure comprises at least one cooling channel and a heat exchange mechanism, and each cooling channel is arranged in the corresponding sliding rail. The heat exchange mechanism is communicated with the cooling channels so as to cool the working table top of the lathe bed. The overall cooling effect of the machine tool can be improved, and the machining precision is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of machine tools, and in particular to a bed cooling structure and a machine tool. Background Art

[0002] The machine tool bed is one of the key components of the machine tool. Its working accuracy and stability have an important impact on the processing quality and efficiency of the machine tool. During the operation of the machine tool, a large amount of heat will be generated due to the sliding friction of the slide rail and the slider and the high-speed rotation of the motor. If the heat cannot be dissipated in time and effectively, the machine tool bed will cause a certain amount of thermal deformation, thereby affecting the processing accuracy and the service life of the machine tool. In the related technology, the machine tool bed is usually not cooled, but only the motor seat is cooled. There are problems such as uneven cooling and poor cooling effect, which makes it difficult to ensure the processing accuracy of the machine tool. Summary of the invention

[0003] Based on this, it is necessary to provide a bed cooling structure and a machine tool to address the problem of no cooling of the machine tool bed.

[0004] To achieve the above objectives, the technical solutions adopted in this application are as follows:

[0005] In a first aspect, an embodiment of the present application provides a bed cooling structure, wherein the bed has a work surface and at least one slide rail is provided on the work surface, and the bed cooling structure comprises:

[0006] At least one cooling channel, each cooling channel is respectively arranged inside a corresponding one of the slide rails;

[0007] A heat exchange mechanism is connected to each of the cooling channels to cool the work surface of the bed.

[0008] Through the above design, the heat exchange mechanism is connected to each of the cooling channels and can transport cold sources to the cooling channels to cool the surface of the work table in the slide rail area, thereby ensuring the processing accuracy of each workpiece.

[0009] In one embodiment of the first aspect, the cooling channel has a plurality of straight segments and a plurality of curved segments, each of the straight segments is arranged in parallel along a sliding path direction of the slide rail, and each of the curved segments is connected between the same ends of two adjacent straight segments.

[0010] Through the above design, within the limited width of the slide rail, the flow path of the cooling channel is increased as much as possible, the flow area of ​​the cold source in the slide rail is increased, and the cooling effect is improved.

[0011] In one embodiment of the first aspect, the lengths of the two outermost straight segments are greater than the other straight segments, and the open ends of the two outermost straight segments are located on the same side of the slide rail.

[0012] Through the above design, the two straight line segments located on the outside run through the entire slide rail, which is convenient for setting the water inlet and outlet of the cooling channel.

[0013] In one embodiment of the first aspect, the distance between two adjacent straight line segments is 10 mm-30 mm.

[0014] Through the above design, the supporting strength of the slide rail is guaranteed while satisfying the cooling effect of the slide rail.

[0015] In one embodiment of the first aspect, the inner diameter of the cooling channel is 6 mm-10 mm.

[0016] Through the above design, the flow rate of the cold source is met and the cooling effect is guaranteed.

[0017] In one of the embodiments of the first aspect, the cooling channel is further provided with a plurality of protrusions, and the inner diameter of the protrusions is larger than the inner diameter of the straight section.

[0018] Through the above design, the inner area of ​​the cooling channel is increased, the contact area between the coolant and the cooling channel is increased, and the cooling effect is improved.

[0019] In one embodiment of the first aspect, the cooling channel is formed by the bed using a sand casting process.

[0020] The above design facilitates the formation of the cooling channel inside the bed without the need for re-drilling holes, thereby ensuring the strength of the bed.

[0021] In one of the embodiments of the first aspect, the heat exchange mechanism includes at least one water inlet pipe, a water cooler and at least one water outlet pipe, each of the water inlet pipes and each of the water outlet pipes are connected to the water cooler, and each of the cooling channels is connected to a corresponding group of the water inlet pipes and the water outlet pipes.

[0022] Through the above design, one end of the water inlet pipe is connected to the water outlet of the cooling channel, and the other end is connected to the water tank of the water cooler, so that the coolant after heat exchange is collected again in the water cooler to realize the circulation of the coolant.

[0023] In one of the embodiments of the first aspect, the bed cooling structure also includes a temperature detection device and a control component, the temperature detection device is installed on the bed and electrically connected to the control component, and the control component is electrically connected to the water cooler to adjust the power of the water cooler according to the temperature feedback from the temperature detection device.

[0024] Through the above design, the flow rate and cooling power of the coolant are adjusted according to the surface temperature of the slide rail, thereby reducing energy loss and increasing the service life of the water cooler.

[0025] In a second aspect, an embodiment of the present application further provides a machine tool, comprising a bed cooling structure and a slider as described in any of the above embodiments, wherein the slider is slidably matched with the slide rail, and during the sliding process of the slider, heat is generated on the surface of the slide rail;

[0026] The length of the slide rail is 800mm-1500mm, and the width is 30mm-55mm; the sliding speed of the slider is 30m / min-60m / min, and the maximum force of the slider is 120kg-180kg; in one sliding stroke of the slider, the heat generated on the surface of the slide rail is 4.2*10 5 J / h-7.4*10 5 J / h.

[0027] Through the above design, the expected working environment is obtained, and under the condition of determining the cooling demand, the bed casting of the machine tool is reasonably modeled and the layout of the cooling channel is planned.

[0028] Compared with the related art, the beneficial effect of the present application is as follows: the present application provides a bed cooling structure and a machine tool, which can be used for cooling the bed of the machine tool. The bed cooling structure includes at least one cooling channel and a heat exchange mechanism. The cooling channel is arranged in the slide rail of the bed, and the heat exchange mechanism is connected to the cooling channel to perform heat exchange cooling on the slide rail and the bed surface, thereby improving the overall cooling effect of the machine tool and ensuring the processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 This is a schematic diagram of the framework structure of the bed cooling structure in some embodiments of the present application;

[0031] Figure 2This is a schematic diagram of the axonometric structure of the bed in some embodiments of the present application;

[0032] Figure 3 This is a schematic diagram of the structure of the cooling channel in some embodiments of the present application;

[0033] Figure 4 The side view structure of the bed in some embodiments of the present application is shown in FIG. Figure 1 ;

[0034] Figure 5 The side view structure of the bed in some embodiments of the present application is shown in FIG. Figure 2 ;

[0035] Figure 6 This is a schematic diagram of the cross-sectional structure of the bed in some embodiments of the present application;

[0036] Figure 7 It is a schematic diagram of the structure of the protrusion in some embodiments of the present application.

[0037] Description of reference numerals:

[0038] 100, bed cooling structure; 110, cooling channel; 111, straight section; 112, curved section; 113, water inlet; 114, water outlet; 115, raised portion; 120, heat exchange mechanism; 121, water inlet pipe; 122, water cooler; 123, water outlet pipe; 130, temperature detection device; 140, control component;

[0039] 200, bed; 210, slide rail; 220, work surface. DETAILED DESCRIPTION

[0040] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0041] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does 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 on the present application.

[0042] In addition, if the term "and / or" appears, "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the objects associated before and after are in an "or" relationship. If the terms "first" and "second" appear, these terms are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0044] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0045] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0046] In the related art, during the operation of the machine tool, the machine tool bed is not effectively cooled, resulting in a certain amount of thermal deformation of the machine tool bed. The high temperature on the bed surface causes the position of the slide rails, lead screws and other workpieces to shift, and the lead screw rotation accuracy decreases, and thermal damage is caused to various parts on the bed, such as bearings, gears, and transmission shafts, reducing their service life.

[0047] See also Figure 1 As shown, in order to improve the above-mentioned problem, an embodiment of the present application provides a bed cooling structure 100 for dissipating heat from a bed 200 of a machine tool, thereby improving the overall cooling effect of the machine tool and ensuring machining accuracy.

[0048] It can be understood that the machine tool includes a bed 200 and a tool group or a fixture group installed on the bed 200, so as to perform corresponding workpiece processing through the tool group or the fixture group. The top surface of the bed 200 is a work surface 220, and a slide rail 210 is arranged on the work surface 220, and the tool group or the fixture group is driven by a motor, and moves along the extension direction of the slide rail 210 through a slider, so as to realize the movement of the tool group or the fixture group during the processing. Therefore, during the movement process, the sliding friction between the slider and the slide rail 210 generates a large amount of heat on the work surface 220, thereby affecting the processing accuracy of the machine tool, and the bed cooling structure 100 provided in the present application can effectively absorb the heat generated by the work surface 220 to ensure the normal operation of the machine tool.

[0049] Continue reading Figure 2 As shown, specifically, the work surface 220 of the bed 200 is provided with at least one slide rail 210. The bed cooling structure 100 includes at least one cooling channel 110 and a heat exchange mechanism 120. Each slide rail 210 has a cooling channel 110 inside. The heat exchange mechanism 120 is connected with each cooling channel 110 and can transport a cold source to the cooling channel 110 to cool the surface of the work surface 220 in the slide rail 210 area to ensure the processing accuracy of each workpiece.

[0050] For example, in this specific embodiment, two slide rails 210 are provided, and the two slide rails 210 are arranged on both sides of the bed body. Accordingly, the bed body cooling structure 100 includes two cooling channels 110, and each slide rail 210 has a cooling channel 110. The two sides of the slider are respectively slidably matched with the two slide rails 210, so that the slider remains stable during the sliding process.

[0051] Continue reading Figure 3 As shown, in some embodiments, the cooling channel 110 has a plurality of straight segments 111 and a plurality of curved segments 112 , each straight segment 111 is arranged in parallel along the sliding path direction of the slide rail 210 , and each curved segment 112 is connected between the same ends of two adjacent straight segments 111 .

[0052] Specifically, each straight segment 111 is arranged parallel to the length direction of the slide rail 210, and the curved segment 112 is used for the smooth transition between two adjacent straight segments 111. The straight segments 111 and the curved segments 112 are connected in sequence to form a sinusoidal curve structure, so as to increase the flow path of the cooling channel 110 as much as possible within the limited width of the slide rail 210, increase the flow area of ​​the cold source in the slide rail 210, and improve the cooling effect.

[0053] For example, the number of straight segments 111 can be two, three, four, five, etc., and the number of curved segments 112 can be one, two, three, four, etc., which can be reasonably set according to the width of the slide rail 210 to increase the maximum flow path of the cooling channel 110 and meet the best cooling effect of the bed 200. It can be understood that since the tail ends of the two straight segments 111 on the side are not connected to the curved segment 112, the number of straight segments 111 is one more than the number of curved segments 112.

[0054] Continue reading Figure 6 As shown, in some embodiments, the lengths of the two outermost straight segments 111 are greater than the other straight segments 111 , and the open ends of the two outermost straight segments 111 are located on the same side of the slide rail 210 .

[0055] See also Figure 4 and Figure 5As shown, specifically, of the two outermost straight segments 111, the open end of one is the water inlet 113, and the open end of the other is the water outlet 114, so that the cold source of the heat exchange mechanism 120 enters the cooling channel 110 through the water inlet 113, and is discharged from the water outlet 114 after absorbing heat, thereby achieving cooling treatment of the slide rail 210 area. At the same time, the two outer straight segments 111 run through the entire slide rail 210, which is convenient for setting the water inlet 113 and the water outlet 114 of the cooling channel 110. The section of the slide rail 210 away from the water inlet 113 and the water outlet 114 is a frequently operated section of the slide rail 210, and more straight segments 111 are arranged in this section, thereby improving the cooling effect of this section and taking away more friction heat.

[0056] In some embodiments, the distance between two adjacent straight line segments 111 is 10 mm-30 mm.

[0057] Exemplarily, the spacing between two adjacent straight segments 111 may be 10mm, 11mm, 13mm, 15mm, 17mm, 19mm, 20mm, 23mm, 27mm, 30mm, etc., and the specific selection can be made according to actual needs to meet the cooling effect of the slide rail 210 and ensure the supporting strength of the slide rail 210.

[0058] In some embodiments, the inner diameter of the cooling channel 110 is 6 mm-10 mm.

[0059] Exemplarily, the inner diameter of the cooling channel 110 may be 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, etc., and may be specifically selected according to implementation requirements to meet the flow rate of the cold source and ensure the cooling effect.

[0060] Continue reading Figure 7 As shown, in some embodiments, the cooling channel 110 is further provided with a plurality of protrusions 115 , and the inner diameter of the protrusions 115 is greater than the inner diameter of the straight section 111 .

[0061] Specifically, the protrusions 115 may be regularly or irregularly distributed inside the straight section 111 or the curved section 112 of the cooling channel 110, thereby increasing the internal area of ​​the cooling channel 110, increasing the contact area between the coolant and the cooling channel 110, and improving the cooling effect.

[0062] In one embodiment, the protrusion 115 may be a conical structure with a triangular cross section, so that the coolant can enter the protrusion 115 with a larger inner diameter during circulation, thereby increasing the contact area between the coolant and the bed 200 and improving the cooling effect.

[0063] In another embodiment, the protrusion 115 may also be a truncated cone structure with an arc-shaped cross section, which can also increase the inner area of ​​the cooling channel 110, and is not specifically limited here.

[0064] In some embodiments, the cooling channel 110 is formed by the bed 200 using a sand casting process.

[0065] Specifically, sand casting refers to a casting method for producing castings in a sand mold, and the casting material of the bed 200 can be steel, iron, and most non-ferrous alloys. By using the sand casting process, the pipeline is pre-laid to form the cooling channel 110 inside the bed 200, without the need to re-drill holes, thereby ensuring the strength of the bed 200.

[0066] In some embodiments, the heat exchange mechanism 120 includes at least one water inlet pipe 121, a water cooler 122 and at least one water outlet pipe 123, each water inlet pipe 121 and each water outlet pipe 123 are connected to the water cooler 122, and each cooling channel 110 is connected to a corresponding set of water inlet pipes 121 and water outlet pipes 123.

[0067] Specifically, the water cooler 122 is filled with coolant, and can control the circulation rate and temperature of the coolant under the drive of the pump body. One end of the water outlet pipe 123 is connected to the water tank of the water cooler 122, and the other end is connected to the water inlet 113 of the cooling channel 110, so as to transport the coolant to the cooling channel 110 for corresponding heat exchange. One end of the water inlet pipe 121 is connected to the water outlet 114 of the cooling channel 110, and the other end is connected to the water tank of the water cooler 122, so that the coolant after heat exchange is collected again in the water cooler 122 to realize the circulation of the coolant.

[0068] Exemplarily, in this specific embodiment, two water inlet pipes 121 and two water outlet pipes 123 are provided, so that the two cooling channels 110 are respectively connected to a group of water inlet pipes 121 and water outlet pipes 123, so that the coolant flow in the two cooling channels 110 is the same, thereby keeping the cooling effect of the two slide rails 210 synchronized.

[0069] In some embodiments, the bed cooling structure 100 also includes a temperature detection device 130 and a control component 140. The temperature detection device 130 is installed on the bed 200 and is electrically connected to the control component 140. The control component 140 is electrically connected to the water cooler 122 to adjust the power of the water cooler 122 according to the temperature feedback from the temperature detection device 130.

[0070] Specifically, the temperature detection device 130 is a temperature sensor, which is installed in the slide rail 210 area of ​​the bed 200 to obtain the temperature of the slide rail 210 area in real time. The control component 140 includes a central processing unit, and a PLC (Programmable Logic Controller) control program can be installed inside the central processing unit to send corresponding control instructions to the water chiller 122 after obtaining the temperature feedback from the temperature detection device 130, so as to adjust the flow rate and cooling power of the coolant according to the surface temperature of the slide rail 210, thereby reducing energy loss and improving the service life of the water chiller 122.

[0071] The embodiment of the present application further provides a machine tool, comprising the bed cooling structure 100 and a slider in any of the above embodiments, the slider slidingly cooperates with the slide rail 210, and during the sliding process of the slider, heat is generated on the surface of the slide rail 210;

[0072] Among them, the length of the slide rail 210 is 800mm-1500mm, and the width is 30mm-55mm; the sliding speed of the slider is 30m / min-60m / min, the maximum force of the slider is 120kg-180kg, and in one sliding stroke of the slider, the heat generated on the surface of the slide rail 210 is 4.2*105J / h-7.4*105J / h.

[0073] Exemplarily, the length of the slide rail 210 may be 800 mm, 900 mm, 1000 mm, 1100 mm, 1200 mm, 1300 mm, 1400 mm, 1500 mm, etc., and the width may be 30 mm, 33 mm, 37 mm, 40 mm, 44 mm, 46 mm, 48 mm, 50 mm, 51 mm, 53 mm, 55 mm, etc. The sliding speed of the slider may be 30 m / min, 35 m / min, 38 m / min, 40 m / min, 42 m / min, 45 m / min, 50 m / min, 53 m / min, 57 m / min, 60 m / min, etc., and the maximum force of the slider may be 120 kg, 130 kg, 140 kg, 150 kg, 160 kg, 170 kg, 180 kg. Accordingly, in one sliding stroke of the slider, the heat generated on the surface of the slide rail 210 is 4.2*105J / h, 4.5*105J / h, 5.1*105J / h, 5.7*105J / h, 6.7*105J / h, 7.1*105J / h, 7.4*105J / h, etc. Specifically, the cooling requirement can be determined according to the specifications of the machine tool slide rail 210 and the specifications, speed, load, reciprocating frequency of the motor, and the expected working environment, and the machine tool bed 200 casting can be modeled by computer-aided design software to plan the layout of the cooling channel 110, so as to select reasonable parameters above.

[0074] This embodiment has the bed cooling structure 100 in any of the above embodiments, and therefore has all the beneficial effects of the bed cooling structure 100 in any of the above embodiments, which will not be described in detail here.

[0075] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0076] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A bed cooling structure, wherein the bed has a work surface and at least one slide rail is provided on the work surface, characterized in that: The bed cooling structure comprises: At least one cooling channel, each cooling channel is respectively arranged inside a corresponding one of the slide rails; A heat exchange mechanism is connected to each of the cooling channels to cool the work surface of the bed.

2. The bed cooling structure according to claim 1, characterized in that: The cooling channel has a plurality of straight segments and a plurality of curved segments, each of the straight segments is arranged in parallel along the sliding path direction of the slide rail, and each of the curved segments is connected between the same ends of two adjacent straight segments.

3. The bed cooling structure according to claim 2, characterized in that: The lengths of the two outermost straight segments are both greater than the other straight segments, and the open ends of the two outermost straight segments are located on the same side of the slide rail.

4. The bed cooling structure according to claim 2, characterized in that: The distance between two adjacent straight line segments is 10 mm to 30 mm.

5. The bed cooling structure according to any one of claims 1 to 4, characterized in that: The inner diameter of the cooling channel is 6 mm-10 mm.

6. The bed cooling structure according to claim 2, characterized in that: The cooling channel is further provided with a plurality of protrusions, and the inner diameter of the protrusions is larger than the inner diameter of the straight section.

7. The bed cooling structure according to claim 1, characterized in that: The cooling channel is formed by the bed using a sand casting process.

8. The bed cooling structure according to claim 1, characterized in that: The heat exchange mechanism includes at least one water inlet pipe, a water cooler and at least one water outlet pipe, each of the water inlet pipes and each of the water outlet pipes are connected to the water cooler, and each of the cooling channels is connected to a corresponding group of the water inlet pipes and the water outlet pipes.

9. The bed cooling structure according to claim 8, characterized in that: The bed cooling structure also includes a temperature detection device and a control component. The temperature detection device is installed on the bed and electrically connected to the control component. The control component is electrically connected to the water cooler to adjust the power of the water cooler according to the temperature feedback from the temperature detection device.

10. A machine tool, characterized in that: A bed cooling structure and a slider according to any one of claims 1 to 9, wherein the slider is slidably matched with the slide rail, and during the sliding process of the slider, heat is generated on the surface of the slide rail; The length of the slide rail is 800mm-1500mm, and the width is 30mm-55mm; the sliding speed of the slider is 30m / min-60m / min, and the maximum force of the slider is 120kg-180kg; in one sliding stroke of the slider, the heat generated on the surface of the slide rail is 4.2*10 5 J / h-7.4*10 5 J / h.

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