Machining process of high-precision elevator guide rail

Abstract

The invention discloses a machining technology of a high-precision elevator guide rail. The machining technology comprises the steps of preliminary straightening, rust removal, primer coating, drying, side face machining, secondary straightening, finish paint brushing, bottom face and end face machining, mortise and tenon machining, punching, detection, rust prevention treatment and packaging. According to the machining technology of the high-precision elevator guide rail, the overall machining precision is improved through multiple times of straightening, and the surfaces of semi-finished products and finished products of the elevator guide rail are prevented from rusting through multiple times of paint brushing and the like.

Description

Technical Field

[0001] The present application relates to the technical field of elevator guide rails, and in particular to a processing technology for high-precision elevator guide rails. Background Art

[0002] An elevator is a permanent transportation device that serves several specific floors in a building and whose car runs on at least two rows of rigid rails that are perpendicular to the horizontal plane or inclined at an angle of less than 15° to the plumb line. With the increase in high-rise residential buildings, elevators are used more and more. Elevator guide rails are the main components of elevator equipment, and they have all reached the level of localization. The product quality can meet the needs of domestic and foreign markets. Elevator guide rails are the safety rails for elevators to travel up and down in the hoistway, which affects the safe operation of the elevator. Therefore, manufacturers have been continuously improving the process to achieve better results. In addition, during the processing of elevator guide rails, not all guide rail blanks are directly processed into finished products. Some are processed into semi-finished product stacks. However, semi-finished products are left in the air for a long time and there is a possibility of rusting again, so they cannot be directly put into production. Summary of the invention

[0003] The purpose of the present invention is to provide a high-precision elevator guide rail processing technology to overcome the deficiencies in the prior art.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] The present application discloses a processing technology for a high-precision elevator guide rail, comprising the following steps:

[0006] A. Preliminary straightening: unstack the stacked guide rail blanks and perform preliminary straightening through the straightening device;

[0007] B. Rust removal: Use a wire brush to grind and remove the rust on the surface of the initial straightening guide rail blank;

[0008] C. Primer: Apply primer on the surface of the guide rail blank after rust removal;

[0009] D. Drying: Dry the primer on the surface of the guide rail blank to obtain the semi-finished guide rail;

[0010] E. Side processing: Use a planer to process the two sides of the semi-finished guide plate of the guide rail;

[0011] F. Secondary straightening: straightening the semi-finished guide rail after side processing;

[0012] G. Apply topcoat: Apply topcoat on the surface of the semi-finished guide rail after secondary straightening and dry it;

[0013] H. Bottom and end surface processing: Use a milling machine to mill the two end surfaces of the semi-finished guide rail and the two ends of the bottom surface of the base plate;

[0014] I. Machining of male and female tenons: mill the female tenons and male tenons at both ends of the semi-finished guide rail using a milling machine;

[0015] J. Drilling: Use a drilling machine to process mounting holes at both ends of the base plate to obtain the finished guide rail;

[0016] K. Inspection: inspect the shape, position and dimensions of the finished guide rail;

[0017] L. Anti-rust treatment: Apply anti-rust oil on the surface of the finished guide rail and cover it with a protective film;

[0018] M. Packaging.

[0019] Furthermore, in the above-mentioned processing technology of the high-precision elevator guide rail, the straightness of the guide rail blank after the preliminary straightening is 0.02mm / 1000mm to 0.03mm / 1000mm.

[0020] Furthermore, in the above-mentioned processing technology of the high-precision elevator guide rail, the primer and the topcoat are water-based paints, the coating thickness of the primer is 20 μm to 30 μm, and the total coating thickness of the primer and the topcoat is less than 50 μm.

[0021] Furthermore, in the above-mentioned processing technology of the high-precision elevator guide rail, the drying time of the base paint is 20 minutes to 40 minutes, and the drying temperature is 50° C. to 65° C.

[0022] Furthermore, in the above-mentioned processing technology of the high-precision elevator guide rail, the straightness of the secondary straightening guide rail semi-finished product is less than 0.02mm / 1000mm.

[0023] Furthermore, in the above-mentioned processing technology of the high-precision elevator guide rail, the punching includes drilling, reaming and countersinking.

[0024] Furthermore, in the above-mentioned processing technology of the high-precision elevator guide rail, the two ends of the bottom surface of the bottom plate are repainted before packaging.

[0025] Compared with the prior art, the advantages of the present invention are: the processing technology of the high-precision elevator guide rail of the present invention improves the overall processing accuracy through multiple straightening, and avoids rust on the surface of the semi-finished and finished products of the elevator guide rail by multiple painting and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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 recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 Shown is a schematic structural diagram of a high-precision elevator guide rail in a specific embodiment of the present invention. DETAILED DESCRIPTION

[0028] The following will describe the technical solutions in the embodiments of the present invention in detail in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Combination Figure 1 As shown, a processing technology for a high-precision elevator guide rail is a T-shaped structure, including a bottom plate 1 and a guide plate 2 arranged perpendicularly to each other, mounting holes 3 are processed at both ends of the bottom plate 1, and female tenons 4 and male tenons 5 spliced ​​to each other are processed at both ends of the elevator guide rail. The processing technology includes the following steps:

[0030] A. Preliminary straightening: The stacked guide rail blanks are unpacked and initially straightened by the straightening device. The straightening linear accuracy is controlled at 0.02mm / 1000mm~0.03mm / 1000mm to improve the accuracy of subsequent planer processing and avoid deviation in measuring planer processing accuracy caused by planer processing and straightening;

[0031] B. Rust removal: Use a wire brush to grind and remove the rust on the surface of the preliminary straightening rail blank, and clean the ground surface with water, and then wipe off the water marks with non-woven fabric;

[0032] C. Primer: Apply water-based primer on the surface of the guide rail blank after rust removal. The thickness of the primer is 20μm to 30μm.

[0033] D. Drying: Send the guide rail blanks painted with primer into the tunnel drying furnace, control the drying temperature to 60℃, and the drying time to 30min to obtain the semi-finished guide rails. The drying temperature and temperature cannot change the internal stress of the guide rail blanks. The semi-finished guide rails can be directly sent to the subsequent processing stations, or they can be stacked for temporary storage. The surface is painted with primer to reduce the possibility of rust, and can be directly put into production later;

[0034] E. Side processing: Use a planer to process the two sides of the semi-finished guide plate of the guide rail;

[0035] F. Secondary straightening: straighten the semi-finished guide rail after side processing, and the straightening linear accuracy is controlled below 0.02mm / 1000mm;

[0036] G. Topcoat: Apply topcoat to the surface of the semi-finished guide rail after secondary straightening. The topcoat is also water-based paint. The thickness of the primer and topcoat is less than 50μm. The primer and topcoat can be distinguished by different colors. Then, the guide rail is dried in a tunnel drying furnace. The drying temperature is controlled at 60℃ and the drying time is 30min.

[0037] H. Bottom and end surface processing: Use a milling machine to mill the two end surfaces of the semi-finished guide rail and the two ends of the bottom surface of the base plate to provide a processing benchmark for subsequent mortise and tenon processing and drilling, thereby improving the accuracy of mortise and tenon processing and drilling;

[0038] I. Machining of male and female tenons: mill the female tenons and male tenons at both ends of the semi-finished guide rail using a milling machine;

[0039] J. Drilling: Use a drilling machine to process mounting holes at both ends of the base plate. The steps of processing the mounting holes include drilling, reaming and countersinking, and chamfering or deburring to obtain the finished guide rail;

[0040] K. Inspection: inspect the shape, position and dimensions of the finished guide rail;

[0041] L. Anti-rust treatment: Apply anti-rust oil on the surface of the finished guide rail and cover it with a protective film;

[0042] M. Packaging: Before packaging, the two ends of the bottom plate are manually repainted to improve the anti-rust ability, and then packaged and stacked.

[0043] In summary, the processing technology of the high-precision elevator guide rail of the present invention improves the overall processing accuracy through multiple straightening, and avoids rust on the surface of the semi-finished and finished products of the elevator guide rail by multiple painting and the like.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0045] The above is only a specific implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A processing technology for a high-precision elevator guide rail, the high-precision elevator guide rail comprising a bottom plate and a guide plate arranged perpendicular to each other, characterized in that: The following steps are involved: A. Preliminary straightening: unstack the stacked guide rail blanks and perform preliminary straightening through the straightening device; B. Rust removal: Use a wire brush to grind and remove the rust on the surface of the initial straightening guide rail blank; C. Primer: Apply primer on the surface of the guide rail blank after rust removal; D. Drying: Dry the primer on the surface of the guide rail blank to obtain the semi-finished guide rail; E. Side processing: Use a planer to process the two sides of the semi-finished guide plate of the guide rail; F. Secondary straightening: straightening the semi-finished guide rail after side processing; G. Apply topcoat: Apply topcoat on the surface of the semi-finished guide rail after secondary straightening and dry it; H. Bottom and end surface processing: Use a milling machine to mill the two end surfaces of the semi-finished guide rail and the two ends of the bottom surface of the base plate; I. Machining of male and female tenons: milling the female tenon and male tenon at both ends of the semi-finished guide rail by using a milling machine; J. Drilling: Use a drilling machine to process mounting holes at both ends of the base plate to obtain the finished guide rail; K. Inspection: inspect the shape, position and dimensions of the finished guide rail; L. Anti-rust treatment: Apply anti-rust oil on the surface of the finished guide rail and cover it with a protective film; M. Packaging.

2. The high-precision elevator guide rail processing process according to claim 1, characterized in that: After the straightening step, the straightness of the guide rail blank is 0.02mm / 1000mm to 0.03mm / 1000mm.

3. The high-precision elevator guide rail processing process according to claim 1, characterized in that: The primer and the topcoat are water-based paints, the coating thickness of the primer is 20 μm to 30 μm, and the total coating thickness of the primer and the topcoat is less than 50 μm.

4. The high-precision elevator guide rail processing process according to claim 1 is characterized in that: The drying time of the bottom paint is 20 minutes to 40 minutes, and the drying temperature is 50° C. to 65° C.

5. The high-precision elevator guide rail processing process according to claim 1 is characterized in that: The straightness of the secondary straightening guide rail semi-finished product is less than 0.02mm / 1000mm.

6. The high-precision elevator guide rail processing process according to claim 1, characterized in that: The drilling includes drilling, reaming and countersinking.

7. The high-precision elevator guide rail processing process according to claim 1, characterized in that: Before packaging, both ends of the bottom surface of the bottom plate are repainted.

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