Batch machining process for inclined holes of inclined pulley shaft of European-style lifting hook group

Abstract

The invention provides a batch processing technology for inclined holes of an inclined pulley shaft of an European-style lifting hook group, which not only can meet the precision requirement, but also can realize batch production of the inclined holes of the pulley shaft, improves the production and processing efficiency of an inclined pulley by 60-70%, reduces the production and material cost by 20-30%, and brings considerable economic benefits for enterprises. In addition, due to the matching precision between the pulley shaft of the inclined pulley and the inclined hole, the overall strength and durability of the lifting hook group are enhanced, the safety of lifting operation of the lifting hook group is ensured, and the technical progress and industrial upgrading of the lifting equipment industry are promoted.

Description

Technical Field

[0001] The invention belongs to the technical field of crane hook groups, and in particular relates to a batch processing technology for inclined holes of inclined pulley shafts of European-style hook groups. Background Art

[0002] With the rapid development of construction, manufacturing and other fields, the demand for lifting and hoisting equipment is increasing. As an important component of the crane, the performance and quality of the European hook group are directly related to the safety and efficiency of the lifting operation. As a mid-to-high-end hook group, the European hook group adopts a unique design concept. Compared with the traditional lifting hook group, it has the characteristics of light weight, compact structure, low energy consumption and strong practicality, and is increasingly favored by the market. The traditional hook group manufacturing process has problems such as low production efficiency, insufficient processing accuracy and high cost. The name of the authorization announcement number CN203497929U is: Crane inclined pulley hook group, which reduces the angle between the wire rope and the pulley, avoids the interlacing between the wire ropes, reduces the wear of the wire rope, and increases the service life of the wire rope and the pulley group. However, the pulley shaft hole of this inclined pulley adopts a straight hole installation form. This installation form will cause a large gap between the mixed wheel shaft and the wheel change shaft hole, and dust is easy to enter the gap during the later use. If the shaft hole of the mixing wheel adopts the installation form of inclined hole, the gap between the pulley shaft and the pulley shaft hole will be greatly reduced. However, the processing technology of the inclined hole of the pulley shaft is very complicated and the processing accuracy is high, so the existing processing production efficiency is very low and cannot be mass-produced.

[0003] Therefore, it is necessary to study a new batch processing technology for the inclined holes of pulley shafts, which can not only meet the precision requirements but also improve the processing efficiency, and thus realize the batch processing production of the inclined holes of pulley shafts. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a batch processing technology for the inclined holes of the inclined pulley shaft of a European-style hook assembly, which solves the problem that the existing production and processing technology for the inclined holes of the inclined pulley shaft cannot be mass-produced.

[0005] The technical solution of the present invention is: a batch processing technology for the inclined hole of the inclined pulley shaft of the European hook assembly, comprising the following steps: Step 1: Material selection and defect detection; The hanging plate of the hook group is made of high-quality low-alloy high-strength steel plate Q355B, and the steel plate is tested for chemical composition, mechanical properties analysis and flaw detection to ensure that the steel plate has no material defects and deformation; Step 2: Cutting of steel plates; The steel plate is cut and blanked by a CNC laser cutting machine according to the size parameters of the hanger plate design. The steel plate after blanking is rolled out into the shape of the hanger plate by a cold rolling mill. The rolled hanger plate is drilled once by a CNC drilling machine according to the installation holes designed for the hanger plate and the reserved holes for the inclined holes of the pulley shaft. Step 3: Assemble, install and fix the hanging board; The two matched hanging plates are fixedly connected through the middle rope block and the mounting hole to assemble the two hanging plates into a whole. The installed hanging plates are tilted and placed on the 360° rotatable processing platform under the boring machine, and the hanging plates to be processed are fixed; Step 4: Finish the reserved hole for the inclined hole of the pulley shaft; The extension rod tool is installed on the CNC boring machine, and the inclined hole of the pulley shaft is processed in layers by a feed method that combines straight boring and rapid feed of the empty cutting stroke. When the inclined hole of the pulley shaft on one side of the hanging plate is processed, the 360° rotatable processing platform is rotated 180° to process the inclined hole of the mixing wheel shaft on the other side of the hanging plate. After processing, the hanging plate is removed.

[0006] In the third step, a temporary auxiliary support rod is fixedly connected between the two hanging plates, and the temporary auxiliary support rod is arranged along the circumference of the hanging plates.

[0007] In the third step, the angle between the lower end surface of the hanging plate and the end surface of the processing platform that can rotate 360 ​​degrees is 10 degrees.

[0008] A wedge-shaped cushion block is arranged between the lower end surface of the hanging plate and the end surface of the processing platform which can rotate 360 ​​degrees.

[0009] In the second step, the diameter of the reserved hole for the central axis inclined hole shall not exceed 100 mm.

[0010] Beneficial effects of the present invention: The batch production process of the inclined pulley shaft and inclined holes of the present invention can not only meet the precision requirements, but also realize the batch production of the inclined holes of the pulley shaft, improve the production and processing efficiency of the inclined pulley by 60% to 70%, and reduce the production and material costs by 20% to 30%, bringing considerable economic benefits to the enterprise; in addition, the matching accuracy between the pulley shaft and the inclined hole of the inclined pulley enhances the overall strength and durability of the hook group, ensures the safety of the lifting operation of the hook group, and promotes the technological progress and industrial upgrading of the lifting and hoisting equipment industry. DETAILED DESCRIPTION

[0011] In order to make the objectives, technical solutions and beneficial effects of the present invention more clear, the embodiments of the present invention are described in further detail below.

[0012] A European-style hook assembly inclined pulley shaft inclined hole batch processing technology, comprising the following steps: Step 1: Material selection and defect detection; The hanging plate of the hook group is made of high-quality low-alloy high-strength steel plate Q355B, and the steel plate is tested for chemical composition, mechanical properties analysis and flaw detection to ensure that the steel plate has no material defects and deformation; Step 2: Cutting of steel plates; A CNC laser cutting machine is used to cut the steel plate according to the size parameters of the hanger plate design. The steel plate after cutting is pressed into the shape of the hanger plate by a cold rolling mill. The rolled hanger plate is drilled once by a CNC drilling rig according to the mounting holes designed for the hanger plate and the reserved holes for the shaft oblique holes of the pulley shaft. The diameter of the reserved holes for the shaft oblique holes is not more than 100 mm. This reserved hole can save production and processing time and improve processing efficiency.

[0013] Step 3: Assemble, install and fix the hanging board; The two matched hanging plates are fixedly connected through the middle rope block and the installation hole, so that the two hanging plates are assembled into a whole. The installed hanging plates are tilted and placed on the processing platform that can rotate 360° under the boring machine, and the hanging plates to be processed are fixed; the two hanging plates are fixedly connected with temporary auxiliary support rods, which are arranged along the circumference of the hanging plates. The temporary auxiliary support rods can be in the form of connecting rods or clamping fixtures and other support forms, which can ensure that the two hanging plates are a whole, and ensure the processing accuracy and product quality of the inclined hole of the pulley shaft; the angle between the lower end face of the hanging plate and the end face of the processing platform that can rotate 360° is 10°, and a wedge-shaped pad is arranged between the lower end face of the hanging plate and the end face of the processing platform that can rotate 360°, which supports the processing of the inclined hole of the pulley shaft on the hanging plate. In the actual operation process, a level can be placed on the upper end face of the hanging plate to ensure the processing accuracy of the inclined hole of the mixing wheel shaft.

[0014] Step 4: Finish the reserved hole for the inclined hole of the pulley shaft; The extension rod tool is installed on the CNC boring machine, and the inclined hole of the pulley shaft is processed in layers by a feed method that combines straight boring and rapid feed of the empty cutting stroke. When the inclined hole of the pulley shaft on one side of the hanging plate is processed, the 360° rotatable processing platform is rotated 180° to process the inclined hole of the mixing wheel shaft on the other side of the hanging plate. After processing, the hanging plate is removed.

[0015] The above is a preferred embodiment of the present invention. Those skilled in the art should understand that the embodiments of the present invention are not limited to the above contents, and any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A European-style hook assembly inclined pulley shaft inclined hole batch processing technology, characterized in that: The following steps are involved: Step 1: Material selection and defect detection; The hanging plate of the hook group is made of high-quality low-alloy high-strength steel plate Q355B, and the steel plate is tested for chemical composition, mechanical properties analysis and flaw detection to ensure that the steel plate has no material defects and deformation; Step 2: Cutting of steel plates; The steel plate is cut and blanked by a CNC laser cutting machine according to the size parameters of the hanger plate design. The steel plate after blanking is rolled out into the shape of the hanger plate by a cold rolling mill. The rolled hanger plate is drilled once by a CNC drilling machine according to the installation holes designed for the hanger plate and the reserved holes for the inclined holes of the pulley shaft. Step 3: Assemble and install the hanging board; The two matched hanging plates are fixedly connected through the middle rope block and the mounting hole to assemble the two hanging plates into a whole. The installed hanging plates are tilted and placed on the 360° rotatable processing platform under the boring machine, and the hanging plates to be processed are fixed; Step 4: Finish the reserved hole for the inclined hole of the pulley shaft; The extension rod tool is installed on the CNC boring machine, and the inclined hole of the pulley shaft is processed in layers by a feed method that combines straight boring and rapid feed of the empty cutting stroke. When the inclined hole of the pulley shaft on one side of the hanging plate is processed, the 360° rotatable processing platform is rotated 180° to process the inclined hole of the mixing wheel shaft on the other side of the hanging plate. After processing, the hanging plate is removed.

2. The process for batch processing of inclined holes of inclined pulley shafts of European-style hook assemblies according to claim 1 is characterized in that: In the third step, a temporary auxiliary support rod is provided to fix the two hanging plates, and the temporary auxiliary support rod is arranged along the circumference of the hanging plates.

3. The process for batch processing of inclined holes of inclined pulley shafts of European-style hook assemblies according to claim 2 is characterized in that: In the third step, the angle between the lower end surface of the hanging plate and the end surface of the processing platform that can rotate 360 ​​degrees is 10 degrees.

4. The process for batch processing of inclined holes of inclined pulley shafts of European-style hook assemblies according to claim 3 is characterized in that: A wedge-shaped cushion block is arranged between the lower end surface of the hanging plate and the end surface of the processing platform which can rotate 360 ​​degrees.

5. A process for batch processing of inclined holes of inclined pulley shafts of European-style hook assemblies according to any one of claims 1 to 5, characterized in that: In the second step, the diameter of the reserved hole for the central axis inclined hole shall not exceed 100 mm.