A machine tool guide rail welding method

Abstract

The present application relates to a kind of machine tool guide rail welding methods, and the welding method includes the following steps: S1, positioning base and two rail strips;S2, welding;3), cooling.The present application is preformed by using pressing plate to make base produce predeformation to compensate the deformation produced after welding in one aspect, so as to reduce the difficulty of subsequent shaping;On the other hand, it can realize synchronous circulation heat dissipation in the process of clamping workpiece welding, effectively prevent the temperature of workpiece in welding too high and can keep temperature stable, so as to reduce the deformation of workpiece, it is beneficial to improve the welding quality, and ensure the use performance of workpiece.

Description

Technical Field

[0001] This invention belongs to the field of precision machining technology, and specifically relates to a method for welding machine tool guideways. Background Technology

[0002] As is well known, machine tool guideways generally include a base and rails arranged side by side at intervals on the base.

[0003] Currently, machine tool guideways are generally fixed to the base using a welding process during production. The base needs to be clamped in a fixture, and the two guideways are placed on the base according to the design requirements. Finally, the welding is carried out by workers or welding robots. Therefore, each guideway and the base will form horizontal and vertical welds.

[0004] However, the welding process can generate extremely high temperatures, which can lead to large deformation of the workpiece after welding. This can adversely affect the workpiece's fracture characteristics, fatigue strength, shape, size, and accuracy, ultimately impacting subsequent production and operations (the workpiece needs to be reshaped after welding). Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a brand-new method for welding machine tool guideways.

[0006] To solve the above technical problems, the present invention adopts the following technical solution:

[0007] A method for welding machine tool guideways, the machine tool guideways including a base and two rails, wherein each rail and the base form welds extending laterally and longitudinally respectively, the method employs a clamping device including a clamping seat and a cooling assembly, wherein the clamping seat includes a seat body with a cooling channel, a heat-conducting plate, and a pressure plate, the cooling assembly includes an inlet pipe and an outlet pipe respectively connected to the cooling channel, and a water tank for supplying cooling water, and includes the following steps:

[0008] S 1, Positioning base and two rails

[0009] First, attach two heat-conducting plates to the top of the cooling channel, ensuring that the top surfaces of the two heat-conducting plates are higher than the top surface of the base body. Second, place the base flat on the top surface of the base body and place two rails on both sides of the top surface of the base. At this point, the cooling channel intersects or overlaps with the welds on both sides, and the two heat-conducting plates correspond one-to-one with the two rails, with the vertical projections of the two heat-conducting plates covering the corresponding welds. Finally, use pressure plates to press the base firmly against the top surface of the base body from both sides and the middle. At this point, the portions of the base located on opposite sides of each heat-conducting plate are pre-deformed downwards.

[0010] S2, Welding

[0011] The cooling water is kept circulating between the inlet pipe, outlet pipe, cooling channel, and water tank to form a heat exchange with the top surface of the seat body; then, the welding operation is carried out by manual labor or robot along each weld seam in sequence.

[0012] S3, Cooling

[0013] After the welding of the machine tool guide rail is completed, it is cooled so that the part of the base that was pre-deformed in step S1 is deformed in the opposite direction to compensate for the deformation caused by the pre-deformation. At this time, the welding process of the machine tool guide rail is completed.

[0014] Preferably, in step S3, after the welded machine tool guide rail is cooled for 25 to 30 seconds while still under pressure, the pressure plate is released and the machine tool guide rail is removed.

[0015] Preferably, the heat-conducting plate is made of copper. This effectively improves the efficiency of heat transfer and further enhances the cooling effect.

[0016] Preferably, the distance between the top surface of the heat-conducting plate and the top surface of the base body is 0.8–1.2 mm. Here, the pre-deformation of the base is controlled to make it closer to the deformation after welding and cooling, which facilitates further shaping later.

[0017] Preferably, the pressure plate includes a first plate, a second plate, and a third plate. During clamping, the first and second plates are symmetrically and correspondingly pressed against opposite sides of the base, and the third plate is located between the two rails. Here, the arrangement of the second plates on both sides facilitates quick positioning of the base on the base body, thereby improving welding accuracy.

[0018] Preferably, the first plate and the second plate each include a connecting module extending upward from the top surface of the base body and a clamping module extending horizontally inward from the top of the connecting module. When clamped, the base abuts against the inner side of the connecting module from the opposite sides, and each clamping module presses and drives the corresponding side of the base to deform downward.

[0019] Preferably, during clamping, the projections of the center lines of the third plate, the base, and the seat body in the vertical direction coincide. Here, during the clamping process, the deformation of the portions of the base located on both sides of the third plate is the same, which helps improve the flatness of the center of the base after welding.

[0020] Preferably, the cooling channel includes a first channel and a second channel arranged side-by-side at intervals, and a third channel connecting the first and second channels, wherein the first and second channels are aligned vertically with the two rails. Here, the formed cooling area covers all welds between the two rails and the base, and cooling water can quickly pass through the cooling channel, resulting in better heat dissipation.

[0021] Specifically, the third channel is vertically connected between the ends of the first and second channels, and the inlet and outlet pipes are respectively connected to the other ends of the first and second channels.

[0022] Preferably, the base body is recessed inward from the top to form a heat dissipation groove, and a cover plate is sealed on the top of the heat dissipation groove, wherein a cooling channel is formed between the heat dissipation groove and the cover plate, and a heat-conducting plate is attached to the cover plate. Here, the structure is simple and easy to install and implement.

[0023] Due to the implementation of the above technical solutions, the present invention has the following advantages compared with the prior art:

[0024] On the one hand, this invention uses a pressure plate to pre-deform the base before welding to compensate for the deformation that occurs after welding, thereby reducing the difficulty of subsequent shaping; on the other hand, it can simultaneously achieve circulating heat dissipation during the welding process of clamping the workpiece, effectively preventing the workpiece temperature from becoming too high during welding and maintaining a stable temperature, thereby reducing the deformation of the workpiece, which is beneficial to improving the welding quality and ensuring the performance of the workpiece. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the clamping device for welding machine tool guideways according to the present invention;

[0026] Figure 2 for Figure 1 A top-down view;

[0027] Figure 3 for Figure 2 Schematic diagram of the sectional view along the central AA direction;

[0028] Figure 4 for Figure 2 Enlarged cross-sectional view of the middle BB direction;

[0029] Wherein: G, machine tool guideway; G1, base; G2, rail;

[0030] 1. Clamping seat; 10. Seat body; c. Heat dissipation groove; b 1. Cover plate; b2. Copper plate; t. Cooling channel; t 1. First channel; t 2. Second channel; t 3. Third channel; 11. Pressure plate; 111. First plate; 112. Second plate; k 1. Connecting module; k2. Clamping module; 113. Third plate;

[0031] 2. Cooling components; 20. Liquid inlet pipe; 21. Liquid outlet pipe. Detailed Implementation

[0032] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, a detailed description of specific embodiments of this application is provided below. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0033] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating orientation or positional relationship, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of a second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" a second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intermediate element present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "above," "below," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

[0037] like Figures 1 to 4 As shown, the machine tool guide rail G involved in this embodiment includes a base G1 and two rails G2 arranged side by side and spaced apart on the base G1, wherein each rail G2 and the base G1 form a weld seam f extending laterally and longitudinally respectively; the clamping device involved in this embodiment includes a clamping seat 1 and a cooling component 2 arranged on the clamping seat 1, wherein the base G1 is clamped on the clamping seat 1, and the two rails G2 are placed on the base G1 for welding according to the design requirements.

[0038] Specifically, the clamping base 1 includes a base body 10 and a pressure plate 11 for pressing the base G1 onto the base body 10. The interior of the base body 10 has a cooling channel t that can exchange heat with the top surface of the base body 10. In the vertical orthographic projection, the cooling channel t intersects or coincides with the weld f. The cooling assembly 2 includes an inlet pipe 20 and an outlet pipe 21 that are respectively connected to the cooling channel t, and a water tank for supplying cooling water. The cooling water circulates between the inlet pipe 20, the outlet pipe 21, the cooling channel t, and the water tank.

[0039] In this example, the base body 10 is recessed inward from the top surface to form a heat dissipation groove c, and the top of the heat dissipation groove c is sealed with a cover plate b 1. A cooling channel t is formed between the heat dissipation groove c and the cover plate b 1. The base G1 is clamped between the cover plate b 1 and the pressure plate 11. The cooling channel t includes a first channel t 1 and a second channel t 2 arranged side by side and spaced apart, and a third channel t 3 connected between the first channel t 1 and the second channel t 2. The first channel t 1 and the second channel t 2 are aligned vertically with the two rails G2. The third channel t 3 is vertically connected between the ends of the first channel t 1 and the second channel t 2. The liquid inlet pipe 20 and the liquid outlet pipe 21 are respectively connected to the other ends of the first channel t 1 and the second channel t 2.

[0040] For ease of implementation, a heat-conducting plate b2 is attached to the top surface of the cover plate b1 corresponding to the first channel t1 and the second channel t2. The heat-conducting plate b2 is made of copper and protrudes upward from the top surface of the base body 10. In the vertical orthographic projection, the heat-conducting plate b2 covers the weld seam, and the distance between the top surface of the heat-conducting plate b2 and the top surface of the base body 10 is 1mm.

[0041] In this example, the pressure plate 11 includes a first plate 111, a second plate 112, and a third plate 113. When clamped, the first plate 111 and the second plate 112 are symmetrical and correspondingly pressed on the opposite sides of the base G1. The third plate 113 is located between the two rails G2. The first plate 111, the second plate 112, and the third plate 113 are all bolted to press the base G1 onto the base body 10.

[0042] Specifically, the first plate 111 and the second plate 112 each include a connecting module k1 extending upward from the top surface of the base body 10 and a clamping module k2 extending horizontally inward from the top of the connecting module k1. When clamped, the base G1 abuts against the inner side of the connecting module k1 from its opposite sides, and each clamping module k2 presses and drives the corresponding side of the base G1 to pre-deform downward. When clamped, the part of the base G1 located on both sides of each welding area deforms downward. After welding is completed and cooling is performed, the part of the base G1 located on both sides of each welding area will tilt upward. Here, it can just offset the deformation caused by the pre-pressure fixed before welding.

[0043] Furthermore, when clamped, the projections of the center lines of the third plate 113, the base G1, and the base body 10 in the vertical direction coincide.

[0044] In this example, the liquid inlet pipe 20, the liquid outlet pipe 21, and the water tank are all standard parts. A through hole is opened on the side of the base body 10, and the liquid inlet pipe 20 and the liquid outlet pipe 21 are inserted into the through hole to communicate with the cooling channel t. The water tank circulates the cooling water through a circulating water pump.

[0045] In summary, the machine tool guideway welding method of this embodiment includes the following steps:

[0046] S1, positioning base G1 and two rails G2

[0047] First, two heat-conducting plates b2 are attached to the top of the cooling channel t, with the top surfaces of the two heat-conducting plates b2 higher than the top surface of the base body 10. Second, the base G1 is placed flat on the top surface of the base body 10, and two rails G2 are placed on both sides of the top surface of the base G1. At this time, the cooling channel t coincides with the weld seams on both sides, and the two heat-conducting plates b2 correspond one-to-one with the two rails G2. The vertical projections of the two heat-conducting plates b2 cover the corresponding weld seams. Finally, the pressure plate 11 is used to press the base G1 against the top surface of the base body 10 from both sides and the middle. At this time, the portions of the base G1 located on the opposite sides of each heat-conducting plate b2 are pre-deformed downwards.

[0048] S2, Welding

[0049] The cooling water is kept circulating between the inlet pipe 20, the outlet pipe 21, the cooling channel t, and the water tank to form a heat exchange with the top surface of the seat body 10; then, the welding operation is carried out by manual labor or robot along each weld seam in sequence.

[0050] S3, Cooling

[0051] After the welded machine tool guide rail G is cooled for 25 to 30 seconds while still under pressure, the pressure plate 11 is released and the machine tool guide rail G is removed, so that the pre-deformed part of the base G1 in step S1 is deformed in the opposite direction to compensate for the deformation caused by the pre-deformation. At this time, the welding process of the machine tool guide rail G is completed.

[0052] Therefore, this embodiment has the following advantages;

[0053] 1. By using a pressure plate to pre-deform the base before welding to compensate for the deformation that occurs after welding, the difficulty of subsequent shaping is reduced.

[0054] 2. It can simultaneously achieve circulating heat dissipation during the welding process of clamping the workpiece, effectively preventing the workpiece temperature from becoming too high during welding and maintaining a stable temperature, thereby reducing the deformation of the workpiece, which is conducive to improving the welding quality and ensuring the performance of the workpiece.

[0055] 3. The resulting cooling zone covers all welds between the two rails and the base, resulting in better heat dissipation;

[0056] 4. The use of three clamping plates to press the workpiece firmly from the opposite sides and the middle of the base ensures stable workpiece clamping and prevents misalignment between the rail and the base, which is beneficial to improving welding accuracy. At the same time, the parts of the base located on both sides of each welding area deform downwards, and when the welding is completed and the base is cooled, the parts of the base located on both sides of each welding area will tilt upwards, which can just offset the deformation caused by the pre-pressure before welding and improve the processing accuracy.

[0057] The present invention has been described in detail above, with the aim of enabling those skilled in the art to understand and implement the invention. However, this description should not be construed as limiting the scope of protection of the invention. All equivalent changes or modifications made in accordance with the spirit and essence of the invention should be included within the scope of protection of the invention.

Claims

1. A method of welding a machine tool guide comprising a base and two rails, each rail forming a respective transversely and longitudinally extending weld with the base, characterised by: The clamping device includes a clamping base and a cooling assembly. The clamping base includes a base body with a cooling channel, a heat-conducting plate, and a pressure plate. The pressure plate includes a first plate, a second plate, and a third plate. During clamping, the first and second plates are symmetrical and correspondingly pressed against the opposite sides of the base, and the third plate is located between two rails. Each of the first and second plates includes a connecting module extending upward from the top surface of the base body and a pressing module extending horizontally inward from the top of the connecting module. During clamping, the base abuts against the inner side of the connecting module from its opposite sides, and each pressing module presses and drives the corresponding side of the base to deform downward. The cooling assembly includes an inlet pipe and an outlet pipe respectively connected to the cooling channel, and a water tank for supplying cooling water, and includes the following steps: S1, positioning base and two rails First, attach two heat-conducting plates to the top of the cooling channel, ensuring that the top surfaces of the two heat-conducting plates are higher than the top surface of the base body. Second, place the base flat on the top surface of the base body, and place two rails on both sides of the top surface of the base. At this time, the cooling channel intersects or overlaps with the welds on both sides, and the two heat-conducting plates and the two rails correspond vertically to each other, with the vertical projections of the two heat-conducting plates covering the corresponding welds. Finally, use pressure plates to press the base firmly against the top surface of the base body from both sides and the middle. At this time, the portions of the base located on opposite sides of each heat-conducting plate are pre-deformed downwards. S2, Welding The cooling water is kept circulating between the inlet pipe, outlet pipe, cooling channel, and water tank to form a heat exchange with the top surface of the seat body; then, the welding operation is carried out by manual labor or robot along each weld seam in sequence. S3, Cooling After the welding of the machine tool guide rail is completed, it is cooled so that the part of the base that was pre-deformed in step S1 is deformed in the opposite direction to compensate for the deformation caused by the pre-deformation. At this time, the welding process of the machine tool guide rail is completed.

2. The machine tool guideway welding method according to claim 1, characterized by: In S3, after the welded machine tool guide rail is cooled for 25-30 seconds while still under pressure, the pressure plate is released and the machine tool guide rail is removed.

3. The machine tool guide rail welding method according to claim 1, characterized in that: The heat-conducting plate is made of copper.

4. The machine tool guide rail welding method according to claim 1, characterized in that: The distance between the top surface of the heat-conducting plate and the top surface of the base body is 0.8~1.2mm.

5. The machine tool guide rail welding method according to claim 1, characterized in that: When clamped, the projections of the center lines of the third plate, the base, and the seat body in the vertical direction coincide.

6. The machine tool guide rail welding method according to claim 1, characterized in that: The cooling channel includes a first channel and a second channel arranged side by side at intervals, and a third channel connecting the first channel and the second channel, wherein the first channel and the second channel are arranged vertically aligned with the two rails.

7. The machine tool guide rail welding method according to claim 6, characterized in that: The third channel is vertically connected between the ends of the first channel and the second channel, and the inlet pipe and the outlet pipe are respectively connected to the other ends of the first channel and the second channel.

8. The machine tool guide rail welding method according to claim 1, 6, or 7, characterized in that: The seat body is recessed inward from the top to form a heat dissipation groove, and a cover plate is sealed on the top of the heat dissipation groove. A cooling channel is formed between the heat dissipation groove and the cover plate, and the heat-conducting plate is attached to the cover plate.

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