A method for grinding the butt-weld groove of a bimetallic band saw blade

Abstract

The present invention provides a method for grinding the butt-weld groove of a bimetallic band saw blade. The method comprises storing characteristic parameters of the bimetallic band saw blade model to be ground in a control system; extracting the sawtooth profile of the bimetallic band saw blade to be ground, obtaining the pitch of adjacent teeth of a first joint tooth located at a joint position, and the pitch of a second joint tooth located at the joint position, and determining the positions of the adjacent teeth and the second joint tooth in a tooth sequence; determining the position of the first joint tooth in the tooth sequence, and obtaining the morphological parameters of the butt-weld groove; and adjusting a grinding device so that the grinding head of the grinding device advances to the groove depth of the butt-weld groove, thereby completing the tooth groove grinding. The grinding method of the present invention improves grinding quality and extends the fatigue life of the weld.

Description

Technical Field

[0001] The invention relates to the field of automatic grinding of weld grooves, and in particular to a method for grinding the weld grooves of a bimetallic band saw blade. Background Art

[0002] Bimetallic band saw blades are usually produced in coils. Before being installed on a sawing machine, the coils need to be unwound and cut into the required length. Then, the cut ends are butt-jointed using flash butt welding or argon arc welding to form a ring. However, whether it is flash butt welding or argon arc welding, welding slag will be present at the butt joint. Figure 2 In order to ensure that the joint of the band saw blade does not break during use, the welding slag at the joint position needs to be ground off, especially the tooth groove position at the joint position needs to be ground into a relatively complete arc shape.

[0003] Due to differences in material hardness and shape, the cutting performance requirements of bimetallic band saw blades vary. Common tooth profiles for bimetallic band saw blades include equal tooth and variable tooth profiles to meet different cutting requirements. Equal tooth profiles refer to blades with uniform tooth tips. Because equal tooth pitches ensure uniform force during cutting, the teeth experience a smooth, even cutting surface. Variable tooth profiles vary in distance between teeth, creating a unique staggered tooth pattern with varying tip lengths and heights. This suppresses vibration during cutting, prevents ductile warping, and enables high-speed cutting.

[0004] At present, for conventional bimetallic band saw blades with fixed tooth groups and fixed spacing between teeth in the group, the tooth groove grinding of the weld joint is all done manually. Since the saw teeth cut before and after the interface are not the same, high skills are required for the grinding personnel. Manual grinding may result in incomplete grinding, and the tooth groove arc cannot be guaranteed to be excessively rounded, which affects the grinding quality and thus the fatigue life of the weld joint. Summary of the Invention

[0005] The purpose of the present invention is to address the deficiencies of the above-mentioned prior art and provide a method for automatically grinding the butt-weld groove of a bimetallic band saw blade to ensure a smooth transition of the tooth groove arc, improve the grinding quality, and extend the fatigue life of the weld.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A method for grinding the butt-weld groove of a bimetallic band saw blade, characterized by comprising the following steps:

[0008] S1. Storing characteristic parameters of the bimetallic band saw blade to be sharpened in a control system; the characteristic parameters include tooth group length, tooth group sequence, tooth pitch of each tooth, tooth groove depth of each tooth, and back angle of each saw tooth;

[0009] S2, detecting and extracting the sawtooth profile of the bimetallic band saw blade to be sharpened, and obtaining the first tooth pitch Z of the adjacent saw teeth of the first joint saw tooth located at the joint position. 距1 The second tooth pitch Z of the second joint saw teeth located at the joint position 距2 ;

[0010] S3, the first tooth pitch Z 距1 , the second tooth pitch Z 距2 Comparing the characteristic parameters of the bimetallic band saw blade model to be sharpened in the control system to obtain the positions of the adjacent saw teeth of the first joint saw tooth and the second joint saw tooth in the tooth group sequence;

[0011] S4. Determine the position of the first joint serration in the tooth sequence based on the positions of adjacent serrations of the first joint serration, and then obtain the morphological parameters of the butt weld groove based on the positions of the first joint serration and the second joint serration in the tooth sequence; the morphological parameters include the groove depth h' of the first joint serration, the tooth pitch Z' of the first joint serration, and the clearance angle j' of the second joint serration;

[0012] S5. Adjust the grinding device according to the morphological parameters of the butt weld groove, so that the grinding head of the grinding device performs grinding in a direction parallel to the flank surface of the second joint saw tooth until the grinding head of the grinding device is fed to the tooth groove depth h' of the first joint saw tooth.

[0013] Furthermore, in step S2, a visual system is provided directly above the joint position of the bimetallic band saw blade, and a light source is provided below the joint position of the bimetallic band saw blade. The visual system is used to detect and extract the sawtooth profile of the bimetallic band saw blade.

[0014] Furthermore, the detection field of view of the visual system is three saw teeth, including a first joint saw tooth, a second joint saw tooth, and a saw tooth adjacent to the first joint saw tooth or the second joint saw tooth at the joint position.

[0015] Furthermore, the grinding device includes a rotating shaft for adjusting the angle of the grinding wheel, an X-axis moving shaft installed on the rotating shaft, a Y-axis moving shaft installed on the X-axis moving shaft, a grinding spindle installed on the Y-axis moving shaft, and a grinding wheel installed on the grinding spindle; the Y-axis moving shaft is perpendicular to the X-axis moving shaft; and the grinding wheel is used to grind the tooth groove.

[0016] Furthermore, during grinding in step S5, the following steps are specifically included: first, adjust the X-axis motion so that the direction of the X-axis motion is parallel to the back edge direction of the saw blade; then adjust the rotation axis to adjust the grinding wheel until the end face of the grinding wheel is parallel to the back cutting edge of the second joint saw tooth; finally, start the grinding spindle and the grinding wheel, drive the Y-axis motion, and feed the grinding wheel along the back cutting edge direction of the second joint saw tooth to the tooth groove depth h' of the first joint saw tooth.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention compares the detected tooth pitch with the input tooth pitch parameters, determines the position of the joint saw teeth in the tooth group sequence, obtains the morphological parameters of the butt weld tooth groove, and then grinds the butt weld tooth groove at the saw blade joint position to ensure the roundness of the tooth groove arc, meets the requirements of smooth and flat surface of the butt weld tooth groove, efficient and low-cost processing, saves manpower, improves grinding quality, and extends the fatigue life of the weld.

[0019] At the same time, the present invention can realize the rotational movement of the grinding wheel and the position adjustment of the grinding wheel, and grind the bimetallic band saw blade through the radial movement of the grinding wheel, so that the tooth groove of the butt welding mouth at the joint position is ground into a relatively complete arc shape. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of a device for detecting tooth grooves at butt welds of bimetallic band saw blades according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the welding slag at the tooth groove joint of the current bimetallic band saw blade;

[0022] Figure 3 This is a schematic structural diagram of a bimetallic band saw blade according to an embodiment of the present invention;

[0023] Figure 4 yes Figure 1 The tooth profile of the bimetallic band saw blade, where A is the joint position of the bimetallic band saw blade;

[0024] Figure 5 yes Figure 4 A partial enlarged view of the

[0025] Figure 6 Schematic diagram of the structure of a butt weld groove grinding device according to an embodiment of the present invention, wherein a) is a top view and b) is a side view;

[0026] Figure 7 This is a schematic diagram of the grinding process of the tooth groove of the butt weld of a bimetallic band saw blade according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to fully understand the purpose, features and functions of the present invention, the present invention is described in detail through the following specific embodiments.

[0028] This embodiment provides a method for grinding the butt-weld groove of a bimetallic band saw blade, comprising the following steps:

[0029] Step 1: store the characteristic parameters of the bimetallic band saw blade to be sharpened in the control system; the characteristic parameters include tooth group length, tooth group sequence, tooth pitch of each tooth, tooth groove depth of each tooth, and back angle of each saw tooth.

[0030] For conventional bimetallic band saw blades with fixed tooth groups and fixed spacing between teeth in the group, the distance between two adjacent tooth tops of the saw blade is the tooth pitch, the distance from the tooth top to the lowest part of the tooth groove is the tooth groove depth, and the angle between the saw tooth back face and the line connecting the two middle teeth of the adjacent tooth group (the teeth that are not deviated) is the back angle. Figure 3 As shown, the teeth of the bimetallic band saw blade model used in this embodiment are arranged in a cyclic and repeated manner according to fixed tooth groups, and each tooth group includes 7 teeth. The tooth group length z, tooth group sequence a1~a7, tooth pitch z1~z7, tooth groove depth h1~h7, and tooth back angle j1~j7 of the bimetallic band saw blade model to be sharpened in this embodiment are stored in advance in the memory of the control system.

[0031] Step 2: Detect and extract the sawtooth profile of the bimetallic band saw blade to be sharpened, and obtain the first tooth pitch Z of the adjacent saw teeth of the first joint saw tooth 21 at the joint position. 距1 The second tooth pitch Z of the second joint saw teeth 22 located at the joint position 距2 .

[0032] like Figure 1 As shown, in this embodiment, the vision system 1 is installed directly above the joint of the bimetallic band saw blade 2 to be sharpened, and the light source 3 is installed below the bimetallic band saw blade 2 to be sharpened. The required detection field of view of the vision system 1 is three saw teeth, including the first joint tooth, the second joint tooth, and a tooth adjacent to the first joint tooth or the second joint tooth.

[0033] like Figure 4 and Figure 5 As shown, the detection field of view of the visual system of this embodiment is three saw teeth, including the first joint saw tooth 21, the second joint saw tooth 22, and an adjacent saw tooth adjacent to the first joint saw tooth 21. Turn on the light source 3, extract the saw tooth profile of the bimetallic band saw blade 2 to be sharpened through the visual system 1, and obtain the tooth pitch Z of the adjacent saw teeth of the first joint saw tooth 21 at the joint position. 距1 , and the tooth pitch Z of the second joint serration 22 at the joint position 距2 .

[0034] Step 3: Set the first tooth pitch Z 距1 , second tooth pitch Z 距2 The characteristic parameters of the bimetallic band saw blade to be sharpened in the control system are compared to obtain the positions of the adjacent teeth of the first joint tooth 21 and the second joint tooth 22 in the tooth sequence.

[0035] Assume that the tooth pitch Z of the adjacent saw teeth of the left first joint saw tooth 21 is 距1 As z2, the sequence of adjacent saw teeth of the first joint saw tooth 21 is a2; the tooth pitch Z of the second joint saw tooth 22 on the right side of the joint position is 距2 As z6, the sequence of the second joint serration 22 on the right side can be obtained as a6.

[0036] Step 4, determine the position of the first joint serration 21 in the tooth sequence according to the position of the adjacent serrations of the first joint serration 21, and then obtain the morphology parameters of the butt weld groove according to the positions of the first joint serration 21 and the second joint serration 22 in the tooth sequence; wherein the morphology parameters include the groove depth h' of the first joint serration 21, the tooth pitch Z' of the first joint serration 21, and the back angle j' of the second joint serration 22.

[0037] like Figure 5 As shown, assuming that the sequence of adjacent saw teeth of the first joint saw tooth 21 is a2, the first joint saw tooth 21 located on the left side of the joint position is a3, and the tooth groove depth h' of the first joint saw tooth 21 is h3, that is, the tooth groove depth h' of the butt weld groove is h3, and the tooth pitch Z' of the first joint saw tooth 21 is z3, that is, the tooth pitch Z' of the butt weld groove is z3; the second joint saw tooth 22 located on the right side of the joint position is a6, and the back angle angle j' of the second joint saw tooth 22 is j6, that is, the back angle angle j' of the butt weld groove is j6.

[0038] Step 5: Adjust the grinding device according to the morphological parameters of the butt weld groove, so that the grinding head of the grinding device grinds in a direction parallel to the back cutting surface of the second joint serration 22 until the grinding head of the grinding device is fed to the tooth groove depth h' of the first joint serration 21.

[0039] like Figure 6 and Figure 7 As shown, the grinding device used in this embodiment mainly consists of a rotating shaft 4, a Y-axis motion axis 5, an X-axis motion axis 6, a grinding spindle 7, and a grinding wheel 8. Among them, the X-axis motion axis 6 is mounted on the rotating shaft 4, the Y-axis motion axis 5 is mounted on the X-axis motion axis 6, and the Y-axis motion axis 5 and the X-axis motion axis 6 are perpendicular to each other. The grinding spindle 7 is mounted on the Y-axis motion axis 5, and the grinding wheel 8 is mounted on the grinding spindle 7. During grinding, the X-axis motion axis 6 is parallel to the back edge of the saw blade.

[0040] like Figure 7As shown, according to the morphological parameters of the butt-weld tooth groove, the X-axis motion axis 6 is adjusted so that the direction of the X-axis motion axis 6 is parallel to the back edge direction of the saw blade, and then the rotating axis 4 is adjusted along the w direction to adjust the grinding wheel 8 until the end face of the grinding wheel is parallel to the back cutting edge of the second joint saw tooth 22. The grinding spindle 7 and the grinding wheel 8 are started, and the Y-axis motion axis 5 is driven to feed the grinding wheel 8 along the back cutting edge direction of the second joint saw tooth 22 to the tooth groove depth h' of the first joint saw tooth 21 to complete the tooth groove grinding.

[0041] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which fall within the scope of protection of the present invention.

[0042] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0043] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. A method for grinding the butt-weld groove of a bimetallic band saw blade, characterized in that: The steps include: S1. Storing characteristic parameters of the bimetallic band saw blade to be sharpened in a control system; the characteristic parameters include tooth group length, tooth group sequence, tooth pitch of each tooth, tooth groove depth of each tooth, and back angle of each saw tooth; S2, detecting and extracting the sawtooth profile of the bimetallic band saw blade to be sharpened, and obtaining the first tooth pitch Z of the adjacent saw teeth of the first joint saw tooth (21) located at the joint position 距1 The second tooth pitch Z of the second joint saw teeth (22) located at the joint position 距2 ; S3, the first tooth pitch Z 距1 , the second tooth pitch Z 距2 Comparing the characteristic parameters of the bimetallic band saw blade model to be sharpened in the control system to obtain the positions of the adjacent saw teeth of the first joint saw teeth (21) and the second joint saw teeth (22) in the tooth group sequence; S4, determining the position of the first joint saw tooth (21) in the tooth sequence according to the position of the adjacent saw teeth of the first joint saw tooth (21), and then obtaining the morphological parameters of the butt weld groove according to the positions of the first joint saw tooth (21) and the second joint saw tooth (22) in the tooth sequence; the morphological parameters include the tooth groove depth h' of the first joint saw tooth (21), the tooth pitch Z' of the first joint saw tooth (21), and the back angle j' of the second joint saw tooth (22); S5. Adjust the grinding device according to the morphological parameters of the tooth groove of the butt weld, so that the grinding head of the grinding device performs grinding in a direction parallel to the back cutting surface of the second joint saw tooth (22) until the grinding head of the grinding device is fed to the tooth groove depth h' of the first joint saw tooth (21).

2. The method for grinding the butt-weld groove of a bimetallic band saw blade according to claim 1, characterized in that: In step S2, a visual system is provided just above the joint position of the bimetallic band saw blade, and a light source is provided below the joint position of the bimetallic band saw blade. The visual system is used to detect and extract the sawtooth profile of the bimetallic band saw blade.

3. The method for grinding the butt-weld groove of a bimetallic band saw blade according to claim 2, characterized in that: The detection field of view of the visual system is three saw teeth, including a first joint saw tooth (21) at the joint position, a second joint saw tooth (22), and a saw tooth adjacent to the first joint saw tooth (21) or the second joint saw tooth (22).

4. The method for grinding the butt-weld groove of a bimetallic band saw blade according to any one of claims 1 to 3, characterized in that: The grinding device includes a rotating shaft for adjusting the angle of the grinding wheel, an X-axis motion shaft installed on the rotating shaft, a Y-axis motion shaft installed on the X-axis motion shaft, a grinding spindle installed on the Y-axis motion shaft, and a grinding wheel installed on the grinding spindle as a grinding head; the Y-axis motion shaft is perpendicular to the X-axis motion shaft; the grinding wheel is used to grind the tooth groove.

5. The method for grinding the butt-weld groove of a bimetallic band saw blade according to claim 4, characterized in that: During the polishing in step S5, the following steps are specifically included: First, adjust the X-axis so that the direction of the X-axis is parallel to the back side of the saw blade; Then, the rotating shaft is adjusted to adjust the grinding wheel until the end face of the grinding wheel is parallel to the back face of the second joint saw tooth (22); Finally, the grinding spindle and the grinding wheel are started, the Y-axis motion axis is driven, and the grinding wheel is fed along the back face direction of the second joint saw tooth (22) to the tooth groove depth h' of the first joint saw tooth (21).

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