CN111390371A - Multi-edge type electrode cap coping cutter rest - Google Patents

Abstract

The invention discloses a multi-edge type electrode cap coping tool rest, which comprises a solid stepped shaft and is mainly and technically characterized in that two locking lugs are arranged at the extension part of a small diameter shaft of the solid stepped shaft, a base circle concentric with the center of the solid stepped shaft is arranged in the solid stepped shaft by taking the center of the solid stepped shaft as a reference, chip removing holes penetrating through the solid stepped shaft are uniformly and outwardly distributed on the base circle in an array manner, array cutter bodies are uniformly distributed at the contour line of the base circle, main cutting edges of the cutter bodies respectively form gamma included angles with the center line of the solid stepped shaft, front cutting edges of β included angles are respectively formed on the cutter bodies, and auxiliary cutting edges are respectively derived along the shapes of the main cutting edges.

Description

Multi-edge type electrode cap coping cutter rest

Technical Field

The invention relates to a sharpening tool rest, in particular to a multi-edge type electrode cap sharpening tool rest.

Background

The resistance welding machine adopts an electrode cap to participate in the welding of metal parts, the electrode cap is used as a vulnerable part, and the failure mainly takes the forms of plastic deformation, surface alloying, recrystallization and adhesion in the welding process, so that the service life of the electrode is reduced. Because the electrode cap is made of copper-based alloy such as pure copper, chromium zirconium copper, silicon nickel copper and the like, the electrode cap is expensive to manufacture and is usually repaired by a coping tool rest and then reused.

At present, the existing electrode cap grinding tool rest is disassembled and assembled, a single-edge type split-charging tool is common, the tool rest with the structure is made of carbon steel, fan-shaped holes are formed in the tool rest, and hard alloy blades or high-speed steel blades are embedded in the fan-shaped holes, so that the structure is low in manufacturing cost, but the electrode cap receives cutting force from a fixed edge direction during grinding, so that the grinding time is long, the cutting force is not uniform, the surface of an electrode is rough after grinding, welding spots of a workpiece are uneven, and the welding strength is difficult to guarantee.

Chinese patent with application number CN201920808540.0 discloses an electrode coping cutter, which is also of a split structure, although the cutter set adopts an integral structure, the cutting edge adopts a single-side edging structure, and after one side of the edging is connected with the side wall of the adjacent cutting edge into a whole, the cutting edge and the side wall are of a linear structure. Although the springs are arranged in the through grooves on the two sides of the outer end of the blade, the two ends of the springs are abutted against the outer end of the blade and the cover plate respectively, when the blade is stressed in the axial direction, the blade properly slides towards the other end and depends on the springs to buffer cutting force and vibration impact force, when the blade slides, the surface of a ground electrode is rough, welding spots of a workpiece are uneven, and welding strength is difficult to guarantee.

In addition, the structure is characterized in that a plurality of parts are adopted for assembly, and the cutter set needs to be replaced after disassembly and decomposition, so that the replacement is inconvenient.

Disclosure of Invention

The invention aims to solve the defects of the problems and provides a multi-edge type electrode cap grinding tool rest which is used for overcoming the defects of non-uniform cutting force, reducing the cutting force, improving the angle of a cutting edge to enable the cutting edge to be sharper and eliminating vibration generated by cutting, so that the phenomenon of edge breakage is solved, the grinding quality of an electrode cap is improved, and the ground electrode cap is repaired as new.

In order to solve the technical problems, the invention adopts the technical scheme that:

the cutting tool comprises a solid stepped shaft and is characterized in that two locking lugs are arranged at the extension of a small-diameter shaft of the solid stepped shaft, a base circle concentric with the center of the solid stepped shaft is arranged in the solid stepped shaft by taking the center of the solid stepped shaft as a reference, chip removing holes penetrating through the solid stepped shaft are uniformly distributed and arrayed outwards on the base circle, arrayed cutter bodies are uniformly distributed at the contour line of the base circle, main cutting edges of the cutter bodies respectively form gamma included angles with the center line of the solid stepped shaft, and front cutting edges with β included angles are formed on the cutter bodies respectively, and auxiliary cutting edges are derived along the shapes of the main cutting edges respectively.

Further, the value of said included angle γ is in the range of 10 ° to 20 °.

Further, the included angle β has a value in the range of 140 ° to 170 °.

Furthermore, three through holes are formed in the end face of the large-diameter shaft extension of the solid stepped shaft.

Furthermore, the number of the uniformly distributed array cutter bodies at the base circle contour line is three or four.

Further, the cutter body is symmetrically arranged in the base circle of the solid stepped shaft.

Furthermore, the solid stepped shaft is made of tungsten carbide hard alloy steel or high-speed steel.

Further, when the solid stepped shaft is made of tungsten carbide hard alloy steel, the machining process comprises the following steps:

firstly, selecting tungsten carbide hard alloy steel with the mark of GW1 in an annealed state, blanking by using a sawing machine, adopting a 3/4 positive rake angle variable sawtooth band saw blade, and reserving 2.5-3mm allowance according to the length size of a drawing, wherein the linear speed of a saw blade is 20-25m/min, the working speed is 8-12 cm/min;

turning, namely reserving 2-2.5mm of allowance according to the length size of the drawing to process the flat end face to the size required by the drawing, turning the outer circle and the chamfer of the solid stepped shaft, and reserving the milling amount of a locking lug;

step three, drilling and cutting, namely drilling a chip removal hole and a wire leading hole for cutter body by using a phi 3-phi 5 drill bit;

step four, wire-electrode cutting machining, namely machining the chip removal hole and the cutter body by adopting a 0.2mm molybdenum wire, wherein the machining voltage is 80-100V, the pulse width is 5-16 mu m, and the pulse gap is 5-9;

fifthly, processing by a five-axis numerical control processing center, namely sequentially processing a lock lug, a front cutting edge of the cutter body, a main cutting edge of the cutter body, an auxiliary cutting edge of the cutter body and a through hole in the five-axis numerical control processing center, wherein 15-25 mu m grinding allowance is reserved on the front cutting edge of the cutter body, the main cutting edge of the cutter body and the auxiliary cutting edge of the cutter body respectively;

step six, heat treatment, namely quenching in a vacuum furnace, wherein the quenching temperature is 1080-1120 ℃, the tempering temperature is 180-220 ℃, and the hardness of the solid stepped shaft is 84-88 HRA;

step seven, grinding, namely grinding the front cutting edge angle of the cutter body, the main cutting edge of the cutter body and the auxiliary cutting edge of the cutter body in sequence by adopting a numerical control universal grinder;

step eight, performing surface blackening treatment, performing surface blackening and oxidation treatment on the solid stepped shaft, wherein the thickness of a plating layer is 0.01-0.02 mm;

preferably, the machining process when the solid stepped shaft is made of high-speed steel comprises the following steps:

firstly, selecting high-speed steel with the grade of W18Cr4V in an annealed state, blanking by using a sawing machine, adopting a 3/4 positive rake angle variable sawtooth band saw blade, keeping the linear speed of a saw blade at 25-30m/min, the working speed at 10-15 cm/min, and reserving 1.5-2.5mm allowance according to the length size of a drawing;

turning, namely reserving 1.5-2.5mm of allowance according to the length size of the drawing to process the flat end face to the size required by the drawing, turning the outer circle and the chamfer of the solid stepped shaft, and reserving the milling amount of a lock lug;

step three, drilling and cutting, namely drilling a chip removal hole and a wire leading hole for cutter body by using a phi 3-phi 5 drill bit;

step four, wire-electrode cutting machining, namely machining the chip removal hole and the cutter body by adopting a 0.2mm molybdenum wire, wherein the machining voltage is 70-100V, the pulse width is 5-16 mu m, and the pulse gap is 5-9;

fifthly, processing by a five-axis numerical control processing center, namely sequentially processing a lock lug, a front cutting edge of the cutter body, a main cutting edge of the cutter body, an auxiliary cutting edge of the cutter body and a through hole in the five-axis numerical control processing center, wherein 20-30 mu m grinding allowance is reserved in the front cutting edge of the cutter body, the main cutting edge of the cutter body and the auxiliary cutting edge of the cutter body respectively;

step six, heat treatment, namely quenching in a vacuum furnace, wherein the quenching temperature is 1170-1210 ℃, the tempering temperature is 550-580 ℃, and the hardness of the solid stepped shaft is 60-64 HRc;

step seven, grinding, namely grinding the front cutting edge angle of the cutter body, the main cutting edge of the cutter body and the auxiliary cutting edge of the cutter body in sequence by adopting a numerical control universal grinder;

step eight, carrying out surface titanium plating treatment, and carrying out vacuum titanium plating on the surface of the solid stepped shaft, wherein the thickness of a plating layer is within the range of 0.03-0.04 mm;

step nine, performing surface blackening treatment, performing surface blackening and oxidation treatment on the solid stepped shaft, wherein the thickness of a plating layer is 0.01-0.02 mm;

compared with the prior art, the invention has the beneficial effects that: the grinding tool rest and the cutting edge form an integral structure, so that the grinding tool rest is convenient to replace and mount, and the replaced tool rest can be reused through grinding and correction.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a front view of four cutter bodies within a solid stepped shaft of the present invention.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a bottom view of fig. 1.

Fig. 4 is a cross-sectional view taken along line a-a of fig. 1.

Fig. 5 is a front view of three cutter bodies within a solid stepped shaft of the present invention.

Fig. 6 is a top view of fig. 5.

Fig. 7 is a bottom view of fig. 5.

Fig. 8 is a sectional view taken along line B-B of fig. 6.

Detailed Description

As shown in fig. 1-4, two locking lugs 2 are disposed at the small-diameter shaft extension of the solid stepped shaft 1, a base circle 3 concentric with the center of the solid stepped shaft 1 is disposed inside the solid stepped shaft 1 with the center of the solid stepped shaft 1 as a reference, chip removing holes 4 penetrating the solid stepped shaft 1 are uniformly and outwardly disposed on the base circle 3 in an array manner, cutter bodies 5 are uniformly disposed at the contour lines of the base circle 3, main blades 6 of the cutter bodies 5 respectively form γ included angles with the center line of the solid stepped shaft 1, front blade angles 7 of β included angles are formed on the cutter bodies 5, and secondary blades 8 are derived along the shapes of the main blades 5.

Further, the value of said included angle γ is in the range of 10 ° to 20 °.

Further, the included angle β has a value in the range of 140 ° to 170 °.

Furthermore, three through holes 9 are arranged at the end surface of the large-diameter shaft extension of the solid stepped shaft 1.

Furthermore, the number of the uniformly distributed array cutter bodies 5 at the base circle contour line is three or four.

Further, the cutter body 5 is symmetrically arranged in the base circle 3 of the solid stepped shaft 1.

Further, the solid stepped shaft 1 is made of tungsten carbide hard alloy steel or high-speed steel.

Further, when the solid stepped shaft 1 is made of tungsten carbide hard alloy steel, the machining process comprises the following steps:

firstly, selecting tungsten carbide hard alloy steel with the mark of GW1 in an annealed state, blanking by using a sawing machine, adopting a 3/4 positive rake angle variable sawtooth band saw blade, and reserving 2.5-3mm allowance according to the length size of a drawing, wherein the linear speed of a saw blade is 20-25m/min, the working speed is 8-12 cm/min;

turning, namely reserving 2-2.5mm of allowance according to the length size of the drawing to process the flat end face to the size required by the drawing, turning the outer circle and the chamfer of the solid stepped shaft 1, and reserving the milling amount of the locking lug 2;

step three, drilling and cutting, namely drilling a wire hole for cutting and processing the chip removal hole 4 and the cutter body 5 by using a phi 3-phi 5 drill;

step four, wire-electrode cutting machining, namely machining the chip removal hole 4 and the cutter body 5 by adopting a 0.2mm molybdenum wire, wherein the machining voltage is 80-100V, the pulse width is 5-16 mu m, and the pulse gap is 5-9;

fifthly, processing by a five-axis numerical control processing center, namely sequentially processing the lock lug 2, the front cutting edge 7 of the cutter body 5, the main cutting edge 6 of the cutter body 5, the auxiliary cutting edge 8 of the cutter body 5 and the through hole 9 in the five-axis numerical control processing center, wherein 15-25 mu m grinding allowance is reserved in the front cutting edge 7 of the cutter body 5, the main cutting edge 6 of the cutter body 5 and the auxiliary cutting edge 8 of the cutter body 5 respectively;

step six, heat treatment, namely quenching in a vacuum furnace, wherein the quenching temperature is 1080-1120 ℃, the tempering temperature is 180-220 ℃, and the hardness of the solid stepped shaft 1 is 84-88 HRA;

step seven, grinding, namely grinding the front cutting edge 7 of the cutter body 5, the main cutting edge 6 of the cutter body 5 and the auxiliary cutting edge 8 of the cutter body 5 in sequence by adopting a numerical control universal grinder;

step eight, performing surface blackening treatment, performing surface blackening and oxidation treatment on the solid stepped shaft 1, wherein the thickness of a plating layer is 0.01-0.02 mm;

preferably, the machining process of the solid stepped shaft 1 made of high-speed steel comprises the following steps:

firstly, selecting high-speed steel with the grade of W18Cr4V in an annealed state, blanking by using a sawing machine, adopting a 3/4 positive rake angle variable sawtooth band saw blade, keeping the linear speed of a saw blade at 25-30m/min, the working speed at 10-15 cm/min, and reserving 1.5-2.5mm allowance according to the length size of a drawing;

turning, namely reserving 1.5-2.5mm of allowance according to the length size of the drawing to process the flat end face to the size required by the drawing, turning the outer circle and the chamfer of the solid stepped shaft 1, and reserving the milling amount of the locking lug 2;

step three, drilling and cutting, namely drilling a wire hole for cutting and processing the chip removal hole 4 and the cutter body 5 by using a phi 3-phi 5 drill;

step four, wire-electrode cutting machining, namely machining the chip removal hole 4 and the cutter body 5 by adopting a 0.2mm molybdenum wire, wherein the machining voltage is 70-100V, the pulse width is 5-16 mu m, and the pulse gap is 5-9;

fifthly, processing by a five-axis numerical control processing center, namely sequentially processing the lock lug 2, the front cutting edge 7 of the cutter body 5, the main cutting edge 6 of the cutter body 5, the auxiliary cutting edge 8 of the cutter body 5 and the through hole 9 in the five-axis numerical control processing center, wherein 20-30 mu m grinding allowance is reserved in the front cutting edge 7 of the cutter body 5, the main cutting edge 6 of the cutter body 5 and the auxiliary cutting edge 8 of the cutter body 5 respectively;

step six, heat treatment, namely quenching in a vacuum furnace, wherein the quenching temperature is 1170-1210 ℃, the tempering temperature is 550-580 ℃, and the hardness of the solid stepped shaft 1 is 60-64 HRc;

step seven, grinding, namely grinding the front cutting edge 7 of the cutter body 5, the main cutting edge 6 of the cutter body 5 and the auxiliary cutting edge 8 of the cutter body 5 in sequence by adopting a numerical control universal grinder;

step eight, carrying out surface titanium plating treatment, and carrying out vacuum titanium plating on the surface of the solid stepped shaft 1, wherein the thickness of a plating layer is within the range of 0.03-0.04 mm;

step nine, performing surface blackening treatment, performing surface blackening and oxidation treatment on the solid stepped shaft 1, wherein the thickness of a plating layer is 0.01-0.02 mm;

when four cutter bodies 5 are uniformly distributed on the contour line of the base circle 3 of the solid stepped shaft 1, the centers of the chip removing holes 4 are positioned on the contour line of the base circle 3, the gamma included angle value formed by the main cutting edge 6 of each cutter body 5 and the center line of the solid stepped shaft 1 is 10 degrees, and the β included angle value of the front cutting edge 7 on each cutter body 5 is 150 degrees-170 degrees.

When three cutter bodies 5 are uniformly distributed on the contour line of the base circle 3 of the solid stepped shaft 1, the center of the chip removal hole 4 is positioned in the contour line of the base circle 3, the gamma included angle value formed by the main cutting edge 6 of each cutter body 5 and the center line of the solid stepped shaft 1 is 20 degrees, and the β included angle value of the front cutting edge 7 on each cutter body 5 is 140 degrees-160 degrees.

When the electrode cap is polished, the solid stepped shaft 1 is installed by screwing the locking lug into the clamping groove of the sharpener, the solid stepped shaft 1 is fixed on the end surface of the sharpener by penetrating a bolt at the through hole 9,

when repairing alloying, recrystallization and adhesion failure forms on the surface of the electrode cap, firstly, grinding and cutting are carried out by adopting GW1 brand in tungsten carbide hard alloy steel material and the solid stepped shaft 1 of the three cutter bodies 5, the main cutting edge 6 of each cutter body 5 forms a gamma included angle value of 20 degrees with the central line of the solid stepped shaft 1, so that the main cutting edge 6 is sharper, the cutting force is reduced, the uneven cutting force is overcome, the main cutting edge 6 is in point contact with the failure form of the electrode cap during grinding, thereby eliminating vibration generated by cutting, and solving the phenomenon of blade breakage, the β included angle value of the front cutting edge 7 on each cutter body 5 is in the range of 140 degrees to 160 degrees, smooth chip removal is ensured, the heat dissipation performance of the main cutting edge 6 is effectively protected, the main cutting edge 6 can continuously and efficiently grind the motor cap, and in the grinding process of the motor cap, the auxiliary cutting edge 8 of each cutter body 5 polishes the ground motor cap of the main cutting edge 6, and improves the grinding quality of the electrode cap.

And the W18Cr4V brand in the high-speed steel material and the solid stepped shafts 1 of the four cutter bodies 5 are adopted for secondary grinding and finishing, and meanwhile, the auxiliary blades 8 of the cutter bodies 5 are used for carrying out secondary grinding and finishing on the motor cap subjected to secondary grinding and finishing on the main blade 6, so that the ground motor cap is new.

In addition, W18Cr4V brand in the high-speed steel material, four solid step shaft 1 of cutter body 5 can be used for the coping that the electrode cap material is red copper, the failure form of brass, the electrode cap material of copper, brass class material is softer, when the plastic deformation failure form of electrode cap and coping copper base alloy material motor cap of coping this type, W18Cr4V brand in the high-speed steel material, four solid step shaft 1 of cutter body 5 are more efficient, and the repair effect is better.

When the main cutting edge 6 and the auxiliary cutting edge 8 of the solid stepped shaft 1 are passivated, the solid stepped shaft can be reused after being ground again, and the utilization rate of the solid stepped shaft is improved.

Claims (9)

1. A multi-edge type electrode cap coping tool rest comprises a solid stepped shaft and is characterized in that two locking lugs are arranged at the extension part of a small-diameter shaft of the solid stepped shaft, a base circle concentric with the center of the solid stepped shaft is arranged inside the solid stepped shaft by taking the center of the solid stepped shaft as a reference, chip removing holes penetrating through the inside of the solid stepped shaft are uniformly distributed on the base circle outwards in an array mode, array cutter bodies are uniformly distributed on the contour line of the base circle, main cutting edges of the cutter bodies respectively form gamma included angles with the center line of the solid stepped shaft, front cutting edges with β included angles are formed on the cutter bodies, and auxiliary cutting edges are derived along the shapes of the main cutting edges.

2. The multi-edge type electrode cap coping tool holder according to claim 1, wherein: the included angle gamma has a value in the range of 10 DEG to 20 deg.

3. The sharpening holder for multi-edge electrode cap according to claim 1, wherein the included angle of β is in the range of 140 ° to 170 °.

4. The multi-edge type electrode cap coping tool holder according to claim 1, wherein: three through holes are arranged on the end surface of the large-diameter shaft extension of the solid stepped shaft.

5. The multi-edge type electrode cap coping tool holder according to claim 1, wherein: the number of the cutter bodies uniformly distributed in the base circle outline is three or four.

6. The multi-edge type electrode cap coping tool holder according to claim 1, wherein: the cutter body is symmetrically arranged in the base circle of the solid stepped shaft.

7. The multi-edge type electrode cap coping tool holder according to claim 1, wherein: the solid stepped shaft is made of tungsten carbide hard alloy steel or high-speed steel.

8. The multi-edge type electrode cap coping tool holder according to claim 1 or claim 7, wherein the machining process when the solid stepped shaft is made of tungsten carbide hard alloy steel comprises the following steps:

firstly, selecting tungsten carbide hard alloy steel with the mark of GW1 in an annealed state, blanking by using a sawing machine, adopting a 3/4 positive rake angle variable sawtooth band saw blade, and reserving 2-2.5mm allowance according to the length size of a drawing, wherein the linear speed of a saw blade is 20-25m/min, the working advance speed is 8-12 cm/min;

turning, namely reserving 2.5-3mm of allowance according to the length size of the drawing to process the flat end face to the size required by the drawing, turning the outer circle and the chamfer of the solid stepped shaft, and reserving the milling amount of a locking lug;

step three, drilling and cutting, namely drilling a chip removal hole and a wire leading hole for cutter body by using a phi 3-phi 5 drill bit;

step four, wire-electrode cutting machining, namely machining the chip removal hole and the cutter body by adopting a 0.2mm molybdenum wire, wherein the machining voltage is 80-100V, the pulse width is 5-16 mu m, and the pulse gap is 5-9;

fifthly, processing by a five-axis numerical control processing center, namely sequentially processing a lock lug, a front cutting edge of the cutter body, a main cutting edge of the cutter body, an auxiliary cutting edge of the cutter body and a through hole in the five-axis numerical control processing center, wherein 15-25 mu m grinding allowance is reserved on the front cutting edge of the cutter body, the main cutting edge of the cutter body and the auxiliary cutting edge of the cutter body respectively;

step six, heat treatment, namely quenching in a vacuum furnace, wherein the quenching temperature is 1080-1120 ℃, the tempering temperature is 180-220 ℃, and the hardness of the solid stepped shaft is 84-88 HRA;

step seven, grinding, namely grinding the front cutting edge angle of the cutter body, the main cutting edge of the cutter body and the auxiliary cutting edge of the cutter body in sequence by adopting a numerical control universal grinder;

and step eight, performing surface blackening treatment, performing surface blackening and oxidation treatment on the solid stepped shaft, wherein the thickness of a plating layer is 0.01-0.02 mm.

9. The multi-edge type electrode cap coping tool holder according to claim 1 or claim 7, wherein the machining process when the solid stepped shaft is made of high-speed steel comprises the following steps:

firstly, selecting high-speed steel with the grade of W18Cr4V in an annealed state, blanking by using a sawing machine, adopting a 3/4 positive rake angle variable sawtooth band saw blade, keeping the linear speed of a saw blade at 25-30m/min, the working speed at 10-15 cm/min, and reserving 1.5-2.5mm allowance according to the length size of a drawing;

turning, namely reserving 1.5-2.5mm of allowance according to the length size of the drawing to process the flat end face to the size required by the drawing, turning the outer circle and the chamfer of the solid stepped shaft, and reserving the milling amount of a lock lug;

step three, drilling and cutting, namely drilling a chip removal hole and a wire leading hole for cutter body by using a phi 3-phi 5 drill bit;

step four, wire-electrode cutting machining, namely machining the chip removal hole and the cutter body by adopting a 0.2mm molybdenum wire, wherein the machining voltage is 70-100V, the pulse width is 5-16 mu m, and the pulse gap is 5-9;

fifthly, processing by a five-axis numerical control processing center, namely sequentially processing a lock lug, a front cutting edge of the cutter body, a main cutting edge of the cutter body, an auxiliary cutting edge of the cutter body and a through hole in the five-axis numerical control processing center, wherein 20-30 mu m grinding allowance is reserved in the front cutting edge of the cutter body, the main cutting edge of the cutter body and the auxiliary cutting edge of the cutter body respectively;

step six, heat treatment, namely quenching in a vacuum furnace, wherein the quenching temperature is 1170-1210 ℃, the tempering temperature is 550-580 ℃, and the hardness of the solid stepped shaft is 60-64 HRc;

step seven, grinding, namely grinding the front cutting edge angle of the cutter body, the main cutting edge of the cutter body and the auxiliary cutting edge of the cutter body in sequence by adopting a numerical control universal grinder;

step eight, carrying out surface titanium plating treatment, and carrying out vacuum titanium plating on the surface of the solid stepped shaft, wherein the thickness of a plating layer is within the range of 0.03-0.04 mm;

and step nine, performing surface blackening treatment, performing surface blackening and oxidation treatment on the solid stepped shaft, wherein the thickness of a plating layer is 0.01-0.02 mm.

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