A machining method of a linear guide rail and a linear guide rail structure

Abstract

The present invention relates to the technical field of guide rails, in particular to a processing method of a linear guide rail and a linear guide rail structure. The processing method includes selecting a profile; cutting the selected profile after leaving a section of tail material at both ends of the length of the preset linear guide rail; performing CNC machining on both ends of the cut profile; opening a V-shaped guide rail groove on the profile through a chamfering tool; arranging a plurality of tooth grooves at equal intervals in a row along the length of the profile at the bottom of the V-shaped guide rail groove; polishing and sandblasting the outer surface of the profile in sequence; performing rough machining and finish machining on the V-shaped guide rail groove and the tooth grooves; performing electrical discharge machining on the V-shaped guide rail groove and the tooth grooves; and performing ultrasonic cleaning on the profile. The present invention is ingeniously designed, the linear guide rail slides more smoothly and the structure is reliable; the processing method enables the linear guide rail to have high machining accuracy, reduces the noise during the operation of the guide rail, does not require additional plastic strips, and is beneficial to improving the service life.

Description

Technical Field

[0001] The present invention relates to the technical field of guide rails, and in particular to a processing method and a linear guide rail structure of a linear guide rail. Background Art

[0002] Linear guide rails can be divided into three types: roller linear guide rails, cylindrical linear guide rails, and ball linear guide rails, which are used to support and guide moving parts to perform reciprocating linear motion in a given direction. According to the friction properties, linear motion guide rails can be divided into types such as sliding friction guide rails, rolling friction guide rails, elastic friction guide rails, and fluid friction guide rails. Currently, in the processing and production of linear guide rails, the common method is to perform planing and milling on round steel to obtain a blank, drill holes, then perform overall heat treatment, and then perform surface grinding and cutting on the blank through a grinding machine to obtain the guide rail; however, the working efficiency of surface grinding and cutting in the processing process is low, and at the same time, the guide rail obtained by the conventional method has low precision; for example, the application number: 202110825643.X, the patent name: A processing method of a linear guide rail, the disclosed processing technology is mainly: extruding profiles, cutting profiles, heat treatment, post-treatment, cleaning and assembly, and it lacks a process that can improve the precision of the profiles. Due to the low precision problem of the linear guide rail, noise is likely to occur when the linear guide rail is used; in order to overcome the noise problem, in the prior art, a plastic strip is added to cooperate with the linear guide rail to reduce noise; however, the linear guide rail with the plastic strip added is easily corroded by the outside world and has a low service life. Summary of the Invention

[0003] The present invention provides a processing method and a linear guide rail structure of a linear guide rail for the problems of the prior art. The design is ingenious, the linear guide rail slides more smoothly, and the structure is reliable; this processing method enables the linear guide rail to have high processing precision, reduces the noise during the operation of the guide rail, does not require additional plastic strips, and is beneficial to improving the service life.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The present invention also provides a processing method of a linear guide rail, including the following steps:

[0006] S1. Select profiles;

[0007] S2. According to the length requirement of the preset linear guide rail, cut the selected profiles after leaving a section of tail material at both ends of the length of the preset linear guide rail.

[0008] S3. Perform CNC machining on both ends of the cut profiles so that the length of the profiles after CNC machining reaches the length of the preset linear guide rail;

[0009] S4. Open a V-shaped guide rail groove on the profiles through a chamfering tool;

[0010] S5. A plurality of tooth grooves are arranged at equal intervals in a row along the length of the profile at the bottom of the V-shaped guide rail groove;

[0011] S6. The outer surface of the profile is polished and sandblasted in sequence;

[0012] S7. The V-shaped guide rail groove and the tooth grooves are subjected to rough machining;

[0013] S8. The V-shaped guide rail groove and the tooth grooves are subjected to finish machining;

[0014] S9. The V-shaped guide rail groove and the tooth grooves are subjected to electrical discharge machining;

[0015] S10. The profile is ultrasonically cleaned.

[0016] Wherein, the depth of the V-shaped guide rail groove in step S4 is 2 mm, and the depth of the tooth groove in step S5 is 0.4 mm.

[0017] Wherein, between step S5 and step S6, there is also included step S51 of heating the steel.

[0018] Wherein, the length of a section of the tail stock in step S2 is 3 mm.

[0019] Wherein, the processing technology further includes step S11: soaking the profile ultrasonically cleaned in step S10 with rust preventive oil.

[0020] The present invention also provides a linear guide rail structure, including two guide rail bodies arranged in parallel with each other. A cage is arranged between the two guide rail bodies. A plurality of rollers are arranged at equal intervals in a row along its length on the cage. V-shaped guide rail grooves are arranged on one side of the two guide rail bodies facing each other. The rollers are in sliding contact with the V-shaped guide rail grooves. A plurality of tooth grooves are arranged at equal intervals in a row along the length direction of the inner wall bottom of the V-shaped guide rail groove. A gear meshing with the tooth grooves is movably arranged between the two guide rail bodies; the V-shaped guide rail groove and the tooth grooves are both made by electrical discharge machining with a spark machine.

[0021] Wherein, the V-shaped guide rail groove and the tooth grooves are both made by electrical discharge machining with a spark machine.

[0022] Wherein, both ends of the guide rail body are detachably connected with limit screws, and the limit screws are used to block both ends of the V-shaped guide rail groove.

[0023] Wherein, a plurality of mounting holes are penetrated through the guide rail body.

[0024] Wherein, the depth of the V-shaped guide rail groove is 2 mm, and the depth of the tooth groove is 0.4 mm. The beneficial effects of the present invention:

[0025] The processing technology of the present invention is ingeniously designed. First, the profile is selected to facilitate subsequent processing. After leaving a section of tail material at both ends of the length of the preset linear guide rail for the selected profile, it is cut off to facilitate subsequent CNC processing, so as to improve the dimensional accuracy of the length of the linear guide rail structure made of the profile. Then, milling is carried out on the V-shaped guide groove and tooth groove of the profile. First, the front end of the V-shaped guide groove and tooth groove is processed by rough machining and finish machining, and then the V-shaped guide groove and tooth groove are processed by electrical discharge machining. In the step of electrical discharge machining, due to the way of electrical discharge machining, the V-shaped guide groove and tooth groove are directly electro-erosion on the profile, improving the dimensional accuracy of the V-shaped guide groove and tooth groove, so that the linear guide rail produced by the above processing method slides more smoothly and the structure is reliable. This processing method makes the processing accuracy of the linear guide rail high, reduces the noise during the operation of the guide rail, does not require additional plastic strips, and is beneficial to improving the service life.

[0026] Among them, the linear guide rail structure of the present invention has a novel structure. Two guide rail bodies can move parallel to each other through the cooperation and meshing with the gear. The tooth groove and the V-shaped guide groove are integrally arranged on the guide rail body, with a stable structure, improving the stability when the two guide rail bodies slide parallel to each other. The V-shaped guide groove and the tooth groove are both made by electrical discharge machining with a spark machine. By this method, the processing and forming accuracy of the tooth groove and the V-shaped guide groove is improved, and further the service life and use stability of the linear guide rail structure are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a flowchart of a processing method of a linear guide rail of the present invention.

[0028] Figure 2 It is a schematic structural diagram of a linear guide rail structure of the present invention.

[0029] Figure 3 It is a schematic structural diagram of a linear guide rail structure of the present invention with one guide rail body hidden.

[0030] Figure 4 It is a schematic structural diagram of a single guide rail body of the present invention.

[0031] In Figures 1 to 4 The reference numerals in the

[0032] 1. Guide rail body; 2. V-shaped guide groove; 3. Tooth groove; 4. Gear; 5. Limit screw; 6. Mounting hole; 7. Cage; 8. Roller. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] For the convenience of understanding by those skilled in the art, the present invention will be further described below in conjunction with the embodiments and the drawings. The content mentioned in the embodiments does not limit the present invention. The present invention will be described in detail below in conjunction with the drawings.

[0034] Example 1

[0035] Example 1 provides a processing method for a linear guide rail, as Figure 1 shown, including the following steps:

[0036] S1. Select the profile; wherein, the profile is straight, cannot be distorted, and cannot have sand holes, which is convenient for subsequent processing;

[0037] S2. According to the length requirement of the preset linear guide rail, cut the selected profile after leaving a section of tail material at both ends of the length of the preset linear guide rail; the length of a section of tail material in step S2 is 3 mm;

[0038] S3. Perform CNC machining on both ends of the cut profile so that the length of the profile after CNC machining reaches the length of the preset linear guide rail;

[0039] S4. Open a V-shaped guide rail groove 2 on the profile through a chamfering tool;

[0040] S5. A plurality of tooth grooves 3 are arranged at equal intervals in a row along the length of the profile at the bottom of the V-shaped guide rail groove 2;

[0041] Between step S5 and step S6, there is also included step S51 of heating the steel;

[0042] S6. Polish and sandblast the outer surface of the profile in sequence;

[0043] S7. Perform rough machining on the V-shaped guide rail groove 2 and the tooth grooves 3; specifically, during rough machining, through one-time machining by a surface grinder, mill the profile into the V-shaped guide rail groove 2 and the tooth grooves 3. The depth of the V-shaped guide rail groove 2 in this rough machining is 0.12 mm less than the preset V-shaped guide rail groove depth threshold, that is, the depth of the V-shaped guide rail groove 2 in this rough machining reserves 0.12 mm on the preset V-shaped guide rail groove depth threshold; the depth of the tooth groove 3 in this rough machining is 0.06 mm less than the preset tooth groove depth threshold, that is, the depth of the tooth groove 3 in this rough machining reserves 0.06 mm on the preset tooth groove depth threshold;

[0044] S8. Perform finish machining on the V-shaped guide rail groove 2 and the tooth groove 3. Specifically, during finish machining, through secondary surface grinding, the profile is milled into the V-shaped guide rail groove 2 and the tooth groove 3. The depth of the V-shaped guide rail groove 2 in this finish machining is 0.05 mm less than the preset V-shaped guide rail groove depth threshold, that is, the depth of the V-shaped guide rail groove in this finish machining reserves 0.05 mm on the preset V-shaped guide rail groove depth threshold. The depth of the tooth groove 3 in this finish machining is 0.015 mm less than the preset tooth groove depth threshold, that is, the depth of the tooth groove 3 in this finish machining reserves 0.015 mm on the preset tooth groove depth threshold.

[0045] S9. Among them, the preset V-shaped guide rail groove depth threshold is 2 mm; the preset tooth groove depth threshold is 0.4 mm. That is, in the above step S7, the depths of the V-shaped guide rail groove 2 and the tooth groove 3 after rough machining are 1.82 mm and 0.34 mm respectively; in the above step S8, the depths of the V-shaped guide rail groove 2 and the tooth groove 3 after finish machining are 1.985 mm and 0.385 mm respectively. Then, the V-shaped guide rail groove 2 and the tooth groove 3 are subjected to electrical discharge machining by a spark machine. So that the depths of the V-shaped guide rail groove 2 and the tooth groove 3 reach the preset V-shaped guide rail groove depth threshold and the preset tooth groove depth threshold respectively.

[0046] S10. Perform ultrasonic cleaning on the profile.

[0047] It further includes step S11: Immerse the profile ultrasonically cleaned in step S10 in rust preventive oil.

[0048] Specifically, the design of the present invention is ingenious. First, the profile is selected to facilitate subsequent processing. After leaving a section of tail stock at both ends of the length of the preset linear guide rail for the selected profile, it is cut off to facilitate subsequent CNC machining to improve the length dimension accuracy of the linear guide rail structure made of the profile. Then, milling machining is performed on the V-shaped guide rail groove 2 and the tooth groove 3 of the profile. First, the front ends of the V-shaped guide rail groove 2 and the tooth groove 3 are processed by rough machining and finish machining, and then the V-shaped guide rail groove 2 and the tooth groove 3 are processed by electrical discharge machining. In the step of electrical discharge machining, due to its electrical discharge machining method, the V-shaped guide rail groove 2 and the tooth groove 3 are directly electro-erosion on the profile, improving the dimensional accuracy of the V-shaped guide rail groove 2 and the tooth groove 3, so that the linear guide rail produced by the above processing method is smoother and more reliable in cooperation during sliding. This processing method enables the linear guide rail to have high machining accuracy, reduces the noise during the operation of the guide rail, and does not require additional plastic strips, which is beneficial to improving the service life.

[0049] Embodiment 2

[0050] This Embodiment 2 provides a linear guide rail structure, as Figures 2 to 4As shown in the figure, it includes two mutually parallel guide rail bodies 1. A cage 7 is arranged between the two guide rail bodies 1. A plurality of rollers 8 are arranged in a row along the length of the cage 7 at equal intervals. On the side where the two guide rail bodies 1 face each other, V-shaped guide rail grooves 2 are arranged. The rollers 8 are in sliding contact with the inner walls of the V-shaped guide rail grooves 2. Under the action of the cage 7 and the rollers 8, the sliding stability and smoothness between the two guide rail bodies 1 are improved. At the bottom of the inner wall of the V-shaped guide rail groove 2, a plurality of tooth grooves 3 are arranged in a row along its length direction at equal intervals. A gear 4 meshing with the tooth grooves 3 is movably arranged between the two guide rail bodies 1. Among them, the V-shaped guide rail grooves 2 and the tooth grooves 3 are both made by electric discharge machining with a spark machine. Specifically, the linear guide rail structure of the present invention is novel in structure. The two guide rail bodies 1 can move parallel to each other through the cooperation and meshing with the gear 4. The tooth grooves 3 and the V-shaped guide rail grooves 2 are integrally arranged on the guide rail body 1, with stable structure, improving the stability when the two guide rail bodies 1 slide parallel to each other; its V-shaped guide rail grooves 2 and tooth grooves 3 are both made by electric discharge machining with a spark machine, with strong high-temperature resistance. By this method, the processing and forming precision of the tooth grooves 3 and the V-shaped guide rail grooves 2 are improved, thereby improving the service life and use stability of the linear guide rail structure.

[0051] In this embodiment, both ends of the guide rail body 1 are detachably connected with limit screws 5, and the limit screws 5 are used to block both ends of the V-shaped guide rail groove 2. Specifically, under the above setting, to prevent the gear 4 on the V-shaped guide rail groove 2 from disengaging, the limit screws 5 play a role of limiting and defining; when the gear 4 needs to be replaced, the limit screws 5 can be unscrewed for disassembly, which is convenient for replacing the gear 4, with convenient assembly and simple disassembly.

[0052] In this embodiment, a plurality of mounting holes 6 are arranged through the guide rail body 1. Specifically, the mounting holes 6 can be fixed to an external frame or wall in cooperation with external bolts, with convenient installation.

[0053] In this embodiment, the depth of the V-shaped guide rail groove 2 is 2 mm, and the depth of the tooth groove 3 is 0.4 mm.

[0054] In this embodiment, both the guide rail body 1 and the cage 7 are made of alloy material. Preferably, both the guide rail body and the cage are made of aluminum alloy material, with high structural strength and wear resistance.

[0055] The above are only the preferred embodiments of the present invention, and there is no limitation to the present invention in any form. Although the present invention is disclosed above in the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art, without departing from the scope of the technical solution of the present invention, when making some changes or modifications using the above-disclosed technical content to equivalent embodiments of equivalent changes, but as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technology of the present invention shall fall within the scope of the technical solution of the present invention.

Claims

1. A processing method of a linear guide rail, characterized in that, It includes the following steps: S1. Select profiles; the profiles are straight bars, without distortion and sand holes; S2. According to the length requirement of the preset linear guide rail, cut the selected profiles after leaving a section of tail material at both ends of the length of the preset linear guide rail; the length of a section of tail material in step S2 is 3 mm; S3. Perform CNC machining on both ends of the cut profiles so that the length of the profiles after CNC machining reaches the length of the preset linear guide rail; S4. Open V-shaped guide grooves on the profiles through a chamfering tool; S5. A plurality of tooth grooves are arranged at equal intervals in a row along the length of the profile at the bottom of the V-shaped guide groove; Between step S5 and step S6, there is also step S51 of heat-treating the steel; S6. Polish and sandblast the outer surface of the profiles in sequence; S7. Perform rough machining on the V-shaped guide grooves and the tooth grooves; during rough machining, through one-time machining with a large surface grinder, mill the profiles into V-shaped guide grooves and tooth grooves. The depth of the V-shaped guide groove in this rough machining is 0.12 mm less than the preset V-shaped guide groove depth threshold, that is, the depth of the V-shaped guide groove in this rough machining reserves 0.12 mm on the preset V-shaped guide groove depth threshold; the depth of the tooth groove in this rough machining is 0.06 mm less than the preset tooth groove depth threshold, that is, the depth of the tooth groove in this rough machining reserves 0.06 mm on the preset tooth groove depth threshold; S8. Perform finish machining on the V-shaped guide grooves and the tooth grooves; during finish machining, through secondary machining with a large surface grinder, mill the profiles into V-shaped guide grooves and tooth grooves. The depth of the V-shaped guide groove in this finish machining is 0.05 mm less than the preset V-shaped guide groove depth threshold, that is, the depth of the V-shaped guide groove in this finish machining reserves 0.05 mm on the preset V-shaped guide groove depth threshold; the depth of the tooth groove in this finish machining is 0.015 mm less than the preset tooth groove depth threshold, that is, the depth of the tooth groove in this finish machining reserves 0.015 mm on the preset tooth groove depth threshold; S9. Perform electrical discharge machining on the V-shaped guide grooves and the tooth grooves; The preset V-shaped guide groove depth threshold is 2 mm; The preset tooth groove depth threshold is 0.4 mm; that is, in step S7 above, the depths of the V-shaped guide groove and the tooth groove after rough machining are 1.82 mm and 0.34 mm respectively; in step S8 above, the depths of the V-shaped guide groove and the tooth groove after finish machining are 1.985 mm and 0.385 mm respectively; then perform electrical discharge machining on the V-shaped guide grooves and the tooth grooves through a spark machine using electrical discharge machining; so that the depths of the V-shaped guide groove and the tooth groove reach the preset V-shaped guide groove depth threshold and the preset tooth groove depth threshold respectively; S10. Perform ultrasonic cleaning on the profiles; The processing technology also includes step S11: soak the profiles ultrasonically cleaned in step S10 with antirust oil.

2. A linear guide rail structure manufactured by the processing method of the linear guide rail according to claim 1, characterized in that: It includes two guide rail bodies arranged in parallel with each other. A cage is arranged between the two guide rail bodies. A plurality of rollers are evenly distributed in a row along the length of the cage. V-shaped guide rail grooves are arranged on one side of the two guide rail bodies facing each other. The rollers are in sliding contact with the V-shaped guide rail grooves. A plurality of tooth grooves are arranged at equal intervals in a row along the length direction of the inner wall bottom of the V-shaped guide rail grooves. A gear meshing with the tooth grooves is movably arranged between the two guide rail bodies; the V-shaped guide rail grooves and the tooth grooves are both made by electrical discharge machining with a spark machine; The depth of the V-shaped guide rail groove is 2 mm, and the depth of the tooth groove is 0.4 mm.

3. A linear guide rail structure according to claim 2, characterized in that: Both the guide rail body and the cage are made of alloy material.

4. A linear guide rail structure according to claim 2, characterized in that: Both ends of the guide rail body are detachably connected with limit screws, and the limit screws are used to block both ends of the V-shaped guide rail groove.

5. A linear guide rail structure according to claim 2, characterized in that: A number of mounting holes are arranged through the guide rail body.

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