Machine tool stand column circulating cooling structure
By setting up circulating cooling channels on both sides of the machine tool column, the problem of accuracy error caused by column thermal deformation was solved, thereby improving the stability and accuracy of the machine tool.
Patent Information
- Application Number
- CN202520288449.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-02-21
AI Technical Summary
Thermal deformation of the machine tool column during long-term high-speed machining affects machining accuracy and stability, especially in non-constant temperature workshops or harsh working conditions.
A circulating cooling channel is set on both sides of the machine tool column. By milling long grooves and covering them with rubber strips and pressure plates, a circulating cooling circuit is formed. The oil cooler is used to remove the heat near the guide rail mounting surface and reduce thermal deformation.
It effectively reduces thermal deformation of the guide rail mounting surface, improves the operating stability of the machine tool and the machining accuracy of parts, and ensures machining quality.
Smart Images
Figure CN223762796U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of machine tool accessories, and specifically relates to a circulating cooling structure for a machine tool column. Background Technology
[0002] During machine tool processing, the column needs to bear a significant weight, including the machine bed, workpiece, Z-axis motion components, and other accessories. Therefore, the stability and precision of the column have a crucial impact on the machining accuracy and rigidity of the machine tool. The column is generally made of casting, with guide rails symmetrically mounted on both sides to mount the Z-axis motion components. During prolonged high-speed machining, thermal deformation can occur inside the column, affecting the machining accuracy and operational stability of the machine tool, potentially leading to inconsistent precision in the machined parts. These problems are more pronounced in non-temperature-controlled workshops or other relatively harsh working conditions. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a machine tool column circulating cooling structure that is simple in structure, low in cost and low in failure rate, in order to overcome the shortcomings of the existing technology. It can remove the heat near the guide rail mounting surface on the machine tool column in a timely manner during the operation of the machine tool, effectively reduce the thermal deformation of the guide rail mounting surface, thereby greatly reducing the accuracy error caused by thermal deformation, improving the stability of machine tool operation and ensuring the machining accuracy of parts.
[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a machine tool column circulating cooling structure, which is arranged on both sides of the front of the machine tool column. Two guide rail mounting surfaces are symmetrically arranged on both sides of the front of the machine tool column. A linear guide rail is vertically mounted on each guide rail mounting surface. A slider is slidably connected to each linear guide rail. The circulating cooling structure includes two circulating cooling channels. Each circulating cooling channel is close to the outer side of one of the guide rail mounting surfaces. Each circulating cooling channel is connected to the oil tank of an external oil cooler to form a circulating cooling loop.
[0005] This utility model features a simple, low-cost, and low-failure-rate circulating cooling structure that does not alter the main structure of the machine tool column. By adding circulating cooling channels on both sides of the machine tool column, local cooling is achieved at the location near the guide rail mounting surface. This effectively removes heat from the area near the guide rail mounting surface during machine tool operation, significantly reducing thermal deformation of the guide rail mounting surface. Consequently, it greatly reduces accuracy errors caused by thermal deformation, improves the stability of machine tool operation, and ensures the machining accuracy of parts.
[0006] Preferably, each of the aforementioned circulating cooling channels includes a milled elongated groove, which is formed below the surface of the machine tool column. The elongated groove is arranged parallel to one of the aforementioned guide rail mounting surfaces. A rubber strip and a pressure plate are sequentially covered on the front side of the elongated groove, and the rubber strip and the pressure plate are tightened and fixed to the front side of the machine tool column by several screws. The design of the circulating cooling channel using a milled elongated groove is simple to manufacture, requires no modification to the casting mold of the machine tool column, and does not require alteration to the original structure of the machine tool column, resulting in low cost.
[0007] Preferably, 3M double-sided adhesive is adhered to both the front and back of the rubber strip. The front of the rubber strip is bonded to the back of the pressure plate, and the back of the rubber strip is bonded to the front of the machine tool column. The 3M double-sided adhesive increases the sealing between the rubber strip and the pressure plate and the machine tool column, ensuring the sealing effect of the circulating cooling channel and preventing oil leakage. Furthermore, the rubber strip can be bonded to the pressure plate first for pre-positioning before being bonded to the machine tool column, thereby ensuring the installation accuracy of the pressure plate.
[0008] Preferably, the orthographic projection of the outer side wall of the slider on each linear guide rail falls on the front of one of the pressure plates, so that the circulating cooling channel is as close as possible to the corresponding guide rail mounting surface, thereby achieving the best cooling effect on the guide rail mounting surface.
[0009] Preferably, a recessed groove is machined on each side of the front of the machine tool column, and each elongated groove is located at the bottom of the recessed groove, with the rear part of the pressure plate embedded in the recessed groove. The recessed grooves limit the pressure plate and the rubber strip, making the overall structure of the circulating cooling structure of this utility model more compact.
[0010] Preferably, the inner surface of each guide rail mounting surface is a side profile, which fits against the inner surface of the corresponding linear guide rail. The side of the pressure plate is provided with a plurality of screw holes, each screw hole extending through the width of the pressure plate. Each screw hole is used to install a side-mounted screw, which is used to press against the outer surface of the corresponding linear guide rail to adjust the straightness of the corresponding linear guide rail, thereby improving the installation accuracy of the linear guide rail.
[0011] Preferably, the machine tool column has multiple threaded holes on its front side, the rubber strip has multiple round holes, and the pressure plate has multiple countersunk holes. Each countersunk hole corresponds to a round hole and a threaded hole, and each screw passes through a countersunk hole and a round hole and is threadedly connected to a threaded hole.
[0012] Preferably, the pressure plate is equipped with an oil inlet connector and an oil outlet connector at its bottom and top, respectively. The oil inlet connector communicates with the bottom end of the elongated groove, and the oil outlet connector communicates with the top end of the elongated groove. The oil inlet connector and the oil outlet connector are respectively connected to the oil tank via oil pipes. Before the circulating cooling structure is put into formal use, oil can be circulated into the two circulating cooling channels respectively, and after standing for 24 hours, an oil cooling pressure holding test can be performed to ensure that there is no oil leakage.
[0013] Compared with the prior art, the present invention has the following advantages: The circulating cooling structure of the machine tool column of the present invention is simple, low in cost, and has a low failure rate. It does not change the main structure of the machine tool column. By adding circulating cooling channels on both sides of the machine tool column, the position of the machine tool column near the guide rail mounting surface is locally cooled. This can remove the heat near the guide rail mounting surface on the machine tool column during machine tool operation in a timely manner, effectively reducing the thermal deformation of the guide rail mounting surface. This significantly reduces the accuracy error caused by thermal deformation, improves the stability of machine tool operation, and ensures the machining accuracy of parts. Attached Figure Description
[0014] Figure 1 The image shows the appearance of the machine tool column equipped with a circulating cooling structure in the embodiment. Figure 1 ;
[0015] Figure 2 For corresponding Figure 1 Exploded view of the structure (excluding linear guides and sliders);
[0016] Figure 3 for Figure 2 Enlarged view of point A in the middle;
[0017] Figure 4 The image shows the appearance of the machine tool column equipped with a circulating cooling structure in the embodiment. Figure 2 ;
[0018] Figure 5 for Figure 4 Enlarged view at point B in the middle;
[0019] Figure 6 This is a partial bottom view of the machine tool column equipped with a circulating cooling structure in the embodiment;
[0020] Figure 7 for Figure 6 Enlarged view at point C;
[0021] The specific reference numerals in the figure are as follows:
[0022] 1-Long groove, 11-Sunk groove, 2-Rubber strip, 21-Round hole, 3-Pressure plate, 31-Screw hole, 32-Side top screw, 33-Counterhole, 34-Oil inlet connector, 35-Oil outlet connector, 4-Screw, 5-Machine tool column, 51-Guide rail mounting surface, 52-Linear guide rail, 53-Slider, 54-Side elevation, 55-Threaded hole. Detailed Implementation
[0023] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.
[0024] The machine tool column circulating cooling structure of the embodiment, such as Figures 1 to 7 As shown, the circulating cooling structure is set on both sides of the front of the machine tool column 5. The length of the machine tool column 5 is 910mm, the width is 630mm, and the height is 1400mm. Two guide rail mounting surfaces 51 are symmetrically arranged on both sides of the front of the machine tool column 5. A linear guide rail 52 is vertically mounted on each guide rail mounting surface 51. A slider 53 is slidably connected to each linear guide rail 52. The circulating cooling structure includes two circulating cooling channels. Each circulating cooling channel is close to the outer side of a guide rail mounting surface 51. Each circulating cooling channel is connected to the oil tank of an external oil cooler (not shown in the figure) to form a circulating cooling loop.
[0025] In this embodiment, each circulating cooling channel includes a milled elongated groove 1. The elongated groove 1 is located below the surface of the machine tool column 5. The elongated groove 1 is arranged parallel to a guide rail mounting surface 51. The front of the elongated groove 1 is covered with a rubber strip 2 and a pressure plate 3 in sequence. A recessed groove 11 is machined on both sides of the front of the machine tool column 5. Each elongated groove 1 is located at the bottom of a recessed groove 11. The rear part of the pressure plate 3 is embedded in the recessed groove 11. The inner side of each guide rail mounting surface 51 is a side profile 54. The side profile 54 is in contact with the inner side of the corresponding linear guide rail 52. The side of the pressure plate 3 is provided with a plurality of screw holes 31. Each screw hole 31 is arranged through the width direction of the pressure plate. Each screw hole 31 is used to install a side top screw 32. The side top screw 32 is used to tighten the outer side of the corresponding linear guide rail 52 to adjust the straightness of the corresponding linear guide rail 52.
[0026] In this embodiment, the rubber strip 2 and the pressure plate 3 are pressed and fixed to the front of the machine tool column 5 by several screws 4. 3M double-sided tape (not shown in the figure) is pasted on the front and back of the rubber strip 2 respectively. The front of the rubber strip 2 is bonded to the back of the pressure plate 3, and the back of the rubber strip 2 is bonded to the front of the machine tool column 5. Specifically, the front of the machine tool column 5 is provided with multiple threaded holes 55, the rubber strip 2 is provided with multiple round holes 21, and the pressure plate 3 is provided with multiple countersunk holes 33. Each countersunk hole 33 corresponds to a round hole 21 and a threaded hole 55. Each screw 4 passes through a countersunk hole 33 and a round hole 21 and is threadedly connected to a threaded hole 55. The orthographic projection of the outer wall of the slider 53 on each linear guide rail 52 falls on the front of a pressure plate 3.
[0027] In this embodiment, an oil inlet connector 34 and an oil outlet connector 35 are respectively installed at the bottom and top of the pressure plate 3. The oil inlet connector 34 is connected to the bottom end of the elongated groove 1, and the oil outlet connector 35 is connected to the top end of the elongated groove 1. The oil inlet connector 34 and the oil outlet connector 35 are respectively connected to the oil tank via oil pipes.
[0028] The aforementioned circulating cooling structure is simple, low-cost, and has a low failure rate. It does not change the main structure of the machine tool column 5. After it is put into use, the oil cooler starts working during machine tool processing. Oil enters from the oil inlet joint 34 at the bottom of each circulating cooling channel and exits from the oil outlet joint 35 at the top of each circulating cooling channel, returning to the oil tank of the oil cooler, forming a circulating cooling circuit. This provides localized cooling to the area of the machine tool column 5 near the guide rail mounting surface 51, effectively removing heat from the area near the guide rail mounting surface 51 during machine tool operation. This reduces thermal deformation of the guide rail mounting surface 51, thereby significantly reducing accuracy errors caused by thermal deformation, improving the stability of machine tool operation, and ensuring the machining accuracy of parts.
Claims
1. A machine tool column circulating cooling structure characterized by, The circulating cooling structure is arranged on the two sides of the front face of the machine tool column, the two sides of the front face of the machine tool column are symmetrically provided with two guide rail mounting surfaces, a linear guide rail is vertically arranged on each guide rail mounting surface, a sliding block is slidably connected to each linear guide rail, the circulating cooling structure comprises two circulating cooling channels, each circulating cooling channel is arranged close to the outer side of one guide rail mounting surface, and each circulating cooling channel is connected with an oil tank of an external oil cooler to form a circulating cooling loop.
2. The machine tool column circulating cooling structure according to claim 1, characterized in that, Each circulating cooling channel comprises a long slot formed by milling, the long slot is arranged below the surface of the machine tool column, the long slot is arranged in parallel with one guide rail mounting surface, the front face of the long slot is covered with a rubber strip and a pressing plate in sequence, and the rubber strip and the pressing plate are fixed to the front face of the machine tool column by a plurality of screws.
3. The machine tool column circulating cooling structure according to claim 2, characterized in that, The front face and the back face of the rubber strip are respectively attached with 3M double-sided adhesive tapes, the front face of the rubber strip is attached to the back face of the pressing plate, and the back face of the rubber strip is attached to the front face of the machine tool column.
4. The machine tool column circulating cooling structure according to claim 2, characterized in that, The front projection of the outer side wall of the sliding block on each linear guide rail falls on the front face of one pressing plate.
5. The machine tool column circulating cooling structure according to claim 2, characterized in that, The front face of the machine tool column is provided with a sunken groove on each side, each long slot is arranged at the bottom of the sunken groove, and the rear part of the pressing plate is embedded in the sunken groove.
6. The machine tool column circulating cooling structure according to claim 5, characterized in that, The inner side face of each guide rail mounting surface is a side vertical face, the side vertical face is attached to the inner side face of the corresponding linear guide rail, a plurality of screw holes are formed in the side face of the pressing plate, each screw hole penetrates the width direction of the pressing plate, each screw hole is used for mounting a side top screw, and the side top screw is used for tightly pressing the outer side face of the corresponding linear guide rail to adjust the straightness of the corresponding linear guide rail.
7. The machine tool column circulating cooling structure according to claim 2, characterized in that, The front face of the machine tool column is provided with a plurality of threaded holes, a plurality of round holes are formed in the rubber strip, and a plurality of counterbores are formed in the pressing plate, each counterbore corresponds to one round hole and one threaded hole, and each screw is threadedly connected to one counterbore, one round hole and one threaded hole.
8. The machine tool column circulating cooling structure according to claim 2, characterized in that, The bottom and the top of the pressing plate are respectively provided with an oil inlet joint and an oil outlet joint, the oil inlet joint is communicated with the bottom end of the long slot, the oil outlet joint is communicated with the top end of the long slot, and the oil inlet joint and the oil outlet joint are respectively connected to the oil tank through oil pipes.