A method for combined processing of a blade shaft and a scrap edge blade head

Abstract

This invention relates to a method for machining a combination of a cutter shaft and a chipping cutter head, belonging to the field of shearing equipment manufacturing technology. The method first machines all structural features except for the gear keyway on the cutter shaft. The gear keyway is used to key the transmission gear. Then, all structural features including the cutting groove are machined on the cutter head, wherein each groove edge and bottom has a machining allowance. The cutter head and cutter shaft are then assembled to form a tool assembly. Finally, using a high-precision machine tool with a precision indexing head, the gear positioning keyway is first machined on the cutter shaft, and then the cutting groove on the cutter head is precision machined to the designed dimensions. This method, by assembling the cutter head and cutter shaft first and then clamping and machining them simultaneously, combined with the high-precision indexing function of the high-precision machine tool and the precision indexing head, achieves higher positional accuracy between the cutting groove and gear keyway on the tool assembly, fundamentally eliminating the impact of assembly clearance and cumulative errors on the overall shape and position accuracy of the tool assembly.

Description

Technical Field

[0001] This invention belongs to the field of shearing equipment manufacturing technology, and specifically relates to a combined processing method of a cutter shaft and a chipping cutter head. Background Technology

[0002] The cutter shaft and cutter head are the core load-bearing and shearing components of the edge-trimming shear in an aluminum hot-rolling production line, and their assembly accuracy directly determines the shearing quality. Currently, the cutter shaft and cutter head are usually machined separately and then assembled together to form the tool assembly of the edge-trimming shear. However, due to assembly gaps and machining errors, the accuracy of the tool assembly produced by conventional methods is not high, and it requires a long period of debugging before use to meet the accuracy requirements.

[0003] Extensive research revealed that the core reason for the aforementioned problems lies in the fact that, during conventional production, the keyway on the cutter shaft used for connecting the transmission gear and the cutting groove on the cutter head used for assembling the shear blades are machined separately. This results in insufficient positional accuracy between the cutting grooves of the assembled cutter assembly and the keyway of the transmission gear. However, the edge-trimming shear uses two sets of these cutter assemblies, both using the same gear system. During shearing, the aluminum sheet is cut by the cooperation of the shear blades of both sets of cutter assemblies, placing high demands on the shear blade clearance. Because the positional accuracy between the cutting grooves of the assembled cutter assembly and the keyway of the transmission gear is insufficient, a center deviation occurs between the keyway of the cutter shaft and the reference teeth of the transmission gear. This leads to poor positional accuracy (or geometrical accuracy) between the shear blades of the two sets of cutter assemblies after final assembly, resulting in uneven clearance between the upper and lower shear blades. Therefore, multiple adjustments are required before use. Summary of the Invention

[0004] This invention provides a method for combining a cutter shaft and a trimmer head for machining edges, which effectively ensures the overall shape and position accuracy of the trimmer head and cutter shaft after assembly, and meets the high-precision shearing requirements of trimmer shears.

[0005] This invention is achieved through the following technical solution: a combined machining method of a cutter shaft and a chipping cutter head, comprising:

[0006] Step 1: Machining all structural features except for the gear keyway on the cutter shaft, the gear keyway being used to key the transmission gear;

[0007] Step 2: Machining all structural features including the cutting groove on the cutting head, wherein each edge and bottom of the cutting groove has a machining allowance;

[0008] Step 3: Assemble the cutter head and cutter shaft to form the tool assembly;

[0009] Step 4: Using a high-precision machine tool and a precision indexing head, first machine the gear keyway on the cutter shaft, and then finish machine the cutter groove on the cutter head to the design dimensions.

[0010] Furthermore, in order to better realize the present invention, in step 2, the machining allowance left for each groove edge and groove bottom of the tool groove is 2mm.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] The present invention provides a method for machining a combination of a cutter shaft and a chipping cutter head. First, all structural features except for the gear keyway are machined on the cutter shaft. The gear keyway is used to key the transmission gear. Then, all structural features including the cutting groove are machined on the cutter head. Each edge of the cutting groove has a machining allowance. The cutter head and the cutter shaft are then assembled by key connection to form a tool assembly. Finally, a high-precision machine tool with a precision indexing head is used to first machine the gear keyway on the cutter shaft, and then the cutting groove of the cutter head is precision machined to the design dimensions.

[0013] Using the above method, the cutter head and cutter shaft are assembled first and then clamped and processed simultaneously. Combined with the high-precision positioning and indexing functions of high-precision machine tools and precision indexing heads, the positional accuracy between the cutter grooves and gear keyways on the tool assembly can be improved. This fundamentally eliminates the impact of assembly gaps and accumulated errors on the overall shape and position accuracy of the tool assembly, and maximizes the mutual shape and position accuracy between the cutter grooves and gear keyways after assembly. This ensures the uniformity of the shearing blade gap and overlap of the two sets of tool assemblies used in pairs, reduces the difficulty of assembly and debugging before use, and improves the shearing stability and operating efficiency of the edge trimmer. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a flowchart of the combined machining method of the cutter shaft and the edge-breaking cutter head provided in the embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the tool assembly in an embodiment of the present invention;

[0017] Figure 3 This is a schematic diagram of the structure of the cutting tool assembly in an embodiment of the present invention when it is equipped with a shear blade and a transmission gear;

[0018] Figure 4 yes Figure 3 The exploded view of the structure shown is formed without the shear blades assembled.

[0019] In the picture:

[0020] 10-Cutter shaft, 11-Gear keyway, 20-Transmission gear, 30-Cutter head, 31-Cutter groove, 40-Shear blade. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0022] Example:

[0023] like Figures 1-4 As shown, the method for combining the cutter shaft and the edge-trimming cutter head provided in this embodiment uses a method of assembling first and then machining to produce the cutter assembly of the edge-trimming shear (without the shear blade 40 assembled). The method includes the following steps:

[0024] Step 1: Produce the cutter shaft 10 using existing processes, and machine all structural features on the cutter shaft 10 except for the gear keyway 11, which is used to key the transmission gear 20. It should be noted that the cutter shaft 10 may have two gear keyways 11, symmetrically distributed on the outer wall of the cutter shaft 10. In practice, in this step, all structural features except for the gear keyway 11 are machined using existing processes.

[0025] Step 2: Machining all structural features, including the grooves 31, onto the cutter head 30, with a machining allowance left on each edge of the groove 31. There are six grooves 31, evenly distributed around the cutter head 30. In fact, this step is largely the same as the conventional edge-trimming shear head 30 machining process, except that only rough machining is performed on the grooves 31, leaving a machining allowance (i.e., a finishing allowance) on each groove wall and bottom. Optionally, this machining allowance is 2mm. The grooves 31, finished to the designed dimensions, are used to install the shear blade 40.

[0026] Step 3: The cutter head 30 and the cutter shaft 10 are then assembled to form a tool assembly. In this step, a first connecting keyway is machined into the inner ring wall of the cutter head 30, and a second connecting keyway is machined into the outer wall of the cutter shaft 10. The cutter head 30 is fitted onto the cutter shaft 10, and the first and second connecting keyways are joined together to form a connecting keyway. A flat key is installed in the connecting keyway to secure the cutter head 30 to the cutter shaft 10, ensuring that the cutter head 30 does not become loose. In fact, the assembly method of the cutter head 30 on the cutter shaft 10 is the same as in existing technology, so it will not be described in detail here.

[0027] Step 4: Using a high-precision machine tool (such as a CNC gantry milling and boring machine) and a precision indexing head, first machine the gear keyway 11 on the cutter shaft 10, and then finish machine the cutting groove 31 of the cutter head 30 to the designed dimensions. In this step, after the cutter head 30 and the cutter shaft 10 are assembled together and the cutter head 30 is no longer loose, the cutter head 30 and the cutter shaft 10 form a whole. Then, this whole is clamped onto the high-precision machine tool, and with the precision indexing head, the gear keyway 11 on the cutter shaft 10 and the cutting groove 31 on the cutter head 30 are machined on the machine tool.

[0028] Using the above method, the cutter head 30 and the cutter shaft 10 are assembled first and then clamped and processed synchronously. Combined with the high-precision positioning and indexing functions of high-precision machine tools and precision indexing heads, the positional accuracy between the cutter groove 31 and the gear keyway 11 on the cutter assembly can be higher. This fundamentally eliminates the impact of assembly gaps and accumulated errors on the overall shape and position accuracy of the cutter assembly, and maximizes the mutual shape and position accuracy between the cutter groove 31 and the gear keyway 11 after assembly. This ensures the uniformity of the gap and overlap of the shear blades 40 of the two sets of cutter assemblies used in pairs, reduces the difficulty of assembly and debugging before use, and improves the shearing stability and operating efficiency of the edge trimmer.

[0029] Additionally, it should be noted that the two sets of tool assemblies used in the pair are machined using the same high-precision machine tool and precision indexing head as described above.

[0030] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope described in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for machining a combination of a cutter shaft and a chipping cutter head, characterized in that, include: Step 1: Machine all structural features except for the gear keyway (11) on the cutter shaft (10), the gear keyway (11) being used to key the transmission gear (20); Step 2: Machining all structural features including the groove (31) on the cutter head (30), wherein each groove edge and groove bottom of the groove (31) has a machining allowance; Step 3: Assemble the cutter head (30) and the cutter shaft (10) to form a tool assembly; Step 4: Using a high-precision machine tool and a precision indexing head, first machine the gear keyway (11) on the cutter shaft (10), and then finish machine the tool groove (31) of the cutter head (30) to the design size.

2. The machining method combining the cutter shaft and the edge-breaking cutter head according to claim 1, characterized in that: In step 2, the machining allowance for each groove edge and groove bottom of the tool groove (31) is 2mm.

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