CN112207470B - Alloy reciprocating saw blade and processing technology thereof - Google Patents

Abstract

The invention relates to an alloy reciprocating saw blade and a processing technology thereof, belongs to the technical field of metal processing tool manufacturing, and is suitable for being matched with a handheld reciprocating saw tool. The invention comprises a saw blade body, a mounting handle and sawteeth, and is characterized in that: the saw blade is characterized by further comprising a tooth holder, the saw blade body is connected with the mounting handle, the saw teeth are arranged on the saw blade body through the tooth holder, a tooth back and a tooth surface are arranged on the saw teeth, and a sawing blade is arranged at the junction of the tooth back and the tooth surface. The left end of saw blade body is the head, the right-hand member of saw blade body is connected with the installation handle, the preceding, the back both sides of saw blade body are the side, the upper end of saw blade body is the back of a saw, the lower extreme of saw blade body is provided with the toothholder. The mounting handle is provided with a fixing hole. The sawtooth is also provided with a tooth bottom surface. The tooth holder is provided with a tooth holder back, a tooth holder surface and a tooth holder top surface, and the tooth holder top surface is arranged between the sawteeth and the tooth holder. Tooth roots are arranged between adjacent tooth holders.

Description

Alloy reciprocating saw blade and processing technology thereof

Technical Field

The invention relates to an alloy reciprocating saw blade and a processing technology thereof, belongs to the technical field of metal processing tool manufacturing, and is suitable for being matched with a handheld reciprocating saw tool.

Background

The existing reciprocating saw blade is generally made of High Carbon Steel (HCS), High Speed Steel (HSS), Bimetal (BIM) and high carbon steel brazing hard alloy (HCS + HM) and applied to cutting objects such as wood, metal, wood nails, ceramic tiles and the like, the metal sawing product is manufactured and applied to different cutting modes and objects according to the inherent material characteristics and the process performance characteristics of the material, certain defects exist in the aspects of sawing performance, service life, application range and cost performance, the product specification classification is complex and various, and the processing processes are different.

In the application aspect: high carbon steels have good flexibility, but insufficient hardness and wear resistance, and are easy to saw and cut, deviate and become blunt; high-speed steel has good hardness and wear resistance, but is not as flexible as high-carbon steel and is easy to damage by heating; the bimetal takes the advantages of the two into account, but the cost performance is unreasonable when different modes are applied, and meanwhile, the hardness, high hot hardness, wear resistance, cutting speed and service life of the tooth part also have improved space; the high-carbon steel brazing hard alloy has complex process and single application mode.

Disclosure of Invention

The invention aims to consider the defects of material process specification difference change, relatively complex manufacturing management, application range and efficiency and service life in the prior art, and provides an alloy reciprocating saw blade and a processing process thereof, wherein the alloy reciprocating saw blade is basically consistent in material process, less in specification and variety, obvious in application mode characteristics, obvious in cost performance series comparative advantages, greatly improved in cutting efficiency and service life in a corresponding application mode, based on new materials, new processes, new equipment and application requirements and market demands.

The technical scheme adopted by the invention for solving the problems is as follows: this alloy reciprocating saw blade, including saw blade body, installation handle and sawtooth, be provided with the fixed orifices on the installation handle, its structural feature lies in: still include the toothholder, be provided with the tooth root between the adjacent toothholder, saw blade body and installation handle formula structure as an organic whole, the sawtooth passes through the toothholder to be fixed on the saw blade body, the sawtooth includes the back of the tooth and flank of tooth, the back of the tooth is for saw cutting the sword with the juncture of flank of tooth, the left end of saw blade body is the head, the right-hand member of saw blade body is the installation handle, the preceding, the back both sides of saw blade body are the side, the upper end of saw blade body is the back of the saw, the lower extreme of saw blade body is provided with the toothholder.

Furthermore, the sawtooth still includes the tooth bottom surface, the toothholder includes tooth seat back of the body, tooth seat face, toothholder top surface and toothholder top inclined plane, toothholder top inclined plane is fixed the setting between sawtooth and the toothholder.

Further, the thickness of the saw blade body is b, the thickness of the saw teeth is S, and S is larger than b.

Further, an included angle between the tooth back and the horizontal plane is R1, an included angle between the tooth face and the vertical plane is R2, an included angle between the tooth back and the tooth face is R3, and R1+ R2+ R3=90 °.

Furthermore, an included angle between the upper end of the mounting handle and the horizontal plane is R7, wherein R1 is larger than R7 and R2, and R2 is not more than R1-R7.

Further, an included angle between the tooth seat back and the horizontal plane is R4, an included angle between the tooth seat back and the tooth seat face is R5, an included angle between the tooth seat face and the vertical face is R6, R6 is 0 °, and R4+ R5+ R6=90 °; the setting of toothholder top surface level, the setting of toothholder top inclined plane slope, the contained angle between toothholder top surface and the toothholder top inclined plane is R8, be provided with R9 on the sawtooth, R8= R2+1/2R 9.

Further, another technical purpose of the invention is to provide a processing technology of the alloy reciprocating saw blade.

The technical purpose of the invention is realized by the following technical scheme.

The processing technology of the alloy reciprocating saw blade is characterized in that: the processing technology comprises the following steps:

the tooth base is provided with corresponding tooth pitch P according to the cutting mode and the thickness of a cutting object, wherein P is larger than the thickness of the cutting object;

the width of the top surface of the tooth seat is W2, and W2 is minimized under the condition that the back of the tooth seat is not deformed during welding;

the width of the tooth seat top inclined surface is W3, the gap between the tooth surface and the tooth seat surface is W1, the width of the sawtooth is W4, the sawtooth is as large as possible under the condition of a certain value of W1, and the whole plane roughness is ensured, W1= (W4-W3)/2;

the bottom surface of the tooth is arranged in an arc-shaped structure, so that the instantaneous heating low-melting-point tooth holder is ensured to fuse and connect the sawteeth and the tooth holder in a small area around the contact without deformation under certain current density and mechanical pressure, and the contact area between the sawteeth and the tooth holder is ensured to be maximized after welding;

the included angle between the sawteeth and the vertical plane is R10 when the sawteeth are welded at the center line angle, and R10= R8, so that R2= R10-1/2R 9;

the tooth back angle is formed in a secondary mode, and under the condition that the distance between the tooth root and the top surface of the tooth base is controlled to be d1 minimum change and R3 maximum, the maximum sawtooth area is enabled to guarantee strength and heat dissipation effect;

test tests show that the welding strength needs to fully wrap the periphery of the tooth bottom surface with the fused base metal and the cutting abrasion is mainly made of hard alloy with good abrasion resistance as much as possible; r1 > R2, R1+ R2+ R3=90 °;

after the sawteeth are welded on the tooth holder, the sawteeth and the tooth holder have intersection points, and a secondary processing surface for secondary processing of the sawteeth is arranged through the intersection points;

because the hard alloy has poor bending resistance and impact resistance, the angle of the front angle of the tooth is reduced to avoid breaking a saw cutting edge, the operation friction force factor is considered, the width of the top surface of the tooth seat is W2, the W2 size is reduced as much as possible, and the straightness of the whole tooth back is ensured to reduce the abrasion to the tooth seat and further cause the damage of saw teeth, and simultaneously, the tooth seat is ensured to have enough strength and heat dissipation area, and the heat dissipation performance of the saw blade body and the strength and the rigidity of the tooth seat are rubbed according to the maximized operation;

the radius of the tooth root is R, R is determined according to laser cutting and a reasonable process proportion of the thickness of the saw blade body and the diameter of the circular arc, stress concentration is avoided through the circular arc design, the angle of R4 is ensured to be as small as possible to increase the area of the tooth base, R6 is 0 DEG to ensure the maximum cutting force, and R4+ R5+ R6=90 degrees;

a gap W1 exists between the tooth surface and the tooth seat surface, the two side surfaces of the saw tooth and the saw blade body keep sawing S more than b, and the two sides are equally divided, so that scraps can be conveniently discharged, and the cutting is mainly performed by hard alloy with high hardness and high wear resistance.

Furthermore, the angle of the installation handle is set to ensure a certain cutting depth Y-direction feeding force and a certain cutting force towards the X-direction during sawing, R1 is more than R7 is more than R2, and the range of R2 is not more than R1-R7 is controlled, so that the effective feed amount range of the hard alloy cutting metal is ensured, the sawtooth is prevented from being damaged by overlarge impact, and the efficiency is low.

Further, the junction of sawtooth and toothholder is provided with the circular arc, the centre of a circle of circular arc is the central point, the junction of tooth back and toothholder top surface is provided with the contact, and the central point is less than the contact during the operation, effectively guarantees that the operation impact force is evenly divided on the tooth bottom surface, maximize buffering dispersion protection sawtooth, in order to reduce the impact damage.

Further, the hard alloy is brittle and hard, poor in toughness and high in price, so that the size is reduced as much as possible under the condition of meeting the requirements of the process and the performance, and the size can be quantitatively fixed corresponding to a cutting mode and a main cutting object.

Compared with the prior art, the invention has the following advantages: the high-carbon steel and hard alloy tooth greatly improves the cutting efficiency of corresponding original products under the same cutting mode and has the service life of more than 3 times by utilizing the obdurability and cost performance of the high-carbon steel, the high hardness (more than 1 time compared with the high-carbon steel, the high-speed steel and bimetal) and the hot hardness and high wear resistance of the hard alloy; the alloy reciprocating saw blade is basically consistent in material and process, a product line is convenient to manage compared with multiple materials, different process modes and single production mode of an original product, the operation management cost of multiple product lines and manpower and frequent process switching is indirectly reduced, and the cost performance of a product series is better.

The alloy reciprocating saw blade is mainly applied according to a cutting mode corresponding to the number of alloy saw Teeth (TPI) distributed in an inch range, wherein 3TPI corresponds to an original high-carbon steel wood cutting mode, 10TPI and 6TPI correspond to original high-speed steel and bimetal cutting metal, a wood nail adding mode, a 2TPI mode corresponds to an original high-carbon steel brazing hard alloy ceramic tile brick cement cutting mode, and 8TPI corresponds to a lifting cutting thick metal cutting mode; the specification quality is simple, and the application adaptability is more professional and efficient.

The key core technology of the alloy reciprocating saw blade comprises the structural design of a tooth holder, the control of welding equipment and process parameters of saw teeth and a saw blade body, the dimensional tolerance precision of a base body and the finish machining precision of the welded alloy saw teeth; the control of the whole process, the correlation of dimensional and angular tolerance, the welding position and strength and the inherent excellent performance of the hard alloy in the heat treatment and surface treatment processes are maintained, and the high-grade quality performance of the whole product is achieved.

The alloy reciprocating saw blade keeps the common shape design of the original reciprocating product mounting handle, the wide adaptability of the application tool and the flexibility of the adjustable and changeable shape of the saw back of the head, and meets the application working condition requirement of a cutting mode; the sawtooth design is substantially uniform in composition.

The high-precision automatic laser cutting process ensures the dimensional precision and the flatness of the saw blade body and the release precision and the dimensional angle of the tooth holder; the roughness treatment process of the top surface of the tooth holder ensures the maximization of the contact surface and the welding strength; detecting and controlling a tooth base and a welded sawtooth size angle by a high-precision projector; the solderless resistance welding has short heating time, concentrated heat and small affected area, and no solder reaction generates air holes and harmful gas and no noise, is convenient for mechanical automatic operation and improves the labor intensity and the occupational health and environmental protection, and a proper protective cover controls sparks, so that the time parameter control of the sawtooth welding current is strict and accurate, the control of the affected area is small under full welding, and the problems of deformation and stress caused by the expansion of the area after being heated for too long time are avoided; the intensity of sawtooth and saw blade body cleanliness, the roughness of certain requirement are guaranteed to the passivation technology after welding the tooth, guarantee follow-up surface treatment appearance quality and firmness, and automatic high accuracy gear grinding technology guarantees sawtooth blade sharpness, smooth finish and angle uniformity, realizes the optimization cutting efficiency performance.

Drawings

FIG. 1 is a front view of an alloy reciprocating saw blade according to an embodiment of the present invention.

Fig. 2 is a partial structural schematic view of a tooth holder according to an embodiment of the invention.

Fig. 3 is a schematic structural view of the saw teeth of the embodiment of the invention before welding.

Fig. 4 is a schematic structural view of the sawtooth welding of the embodiment of the present invention.

Fig. 5 is a schematic structural view of the sawteeth after welding according to the embodiment of the present invention.

Fig. 6 is an enlarged schematic view of a portion I in fig. 1.

FIG. 7 is a schematic left side view of an alloy reciprocating saw blade according to an embodiment of the present invention.

Fig. 8 is an enlarged view of part II in fig. 7.

FIG. 9 is a partial schematic view of an alloy reciprocating saw blade according to an embodiment of the present invention.

FIG. 10 is a force diagram of an alloy reciprocating saw blade according to an embodiment of the present invention.

FIG. 11 is a perspective view of an alloy reciprocating saw blade according to an embodiment of the present invention.

Fig. 12 is an enlarged schematic view of section III in fig. 11.

Fig. 13 is a perspective view of an alloy reciprocating saw blade according to an embodiment of the present invention.

Fig. 14 is an enlarged view of the portion IV of fig. 13.

In the figure: the saw blade comprises a saw blade body 1, a mounting handle 2, sawteeth 3, a head 4, a side surface 5, a saw back 6, a tooth seat 7, a fixing hole 8, a tooth root 9, a tooth back 31, a tooth surface 32, a sawing edge 33, a tooth bottom surface 34, a tooth seat back 71, a tooth seat surface 72, a tooth seat top surface 73, a tooth seat top inclined surface 74, an arc M, a central point O, a contact O1 and an operation impact force F.

Detailed Description

The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.

Examples are given.

Referring to fig. 1 to 14, it should be understood that the structures, ratios, sizes, and the like shown in the drawings attached to the present specification are only used for matching the disclosure of the present specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical essence, and any modifications of the structures, changes of the ratio relationships, or adjustments of the sizes, should still fall within the scope of the present invention without affecting the functions and the achievable objectives of the present invention. In the present specification, the terms "upper", "lower", "left", "right", "middle" and "one" are used for clarity of description, and are not used to limit the scope of the present invention, and the relative relationship between the terms and the relative positions may be changed or adjusted without substantial technical changes.

The alloy reciprocating saw blade in this embodiment, including saw blade body 1, installation handle 2, sawtooth 3, toothholder 7, saw blade body 1 and 2 formula structures as an organic whole of installation handle, sawtooth 3 passes through toothholder 7 to be fixed on saw blade body 1, is provided with tooth root 9 between the adjacent toothholder 7.

The left end of saw blade body 1 in this embodiment is head 4, the right-hand member of saw blade body 1 with for installation handle 2, the preceding, back both sides of saw blade body 1 are side 5, the upper end of saw blade body 1 is back of the body 6, the lower extreme of saw blade body 1 is provided with toothholder 7, is provided with fixed orifices 8 on the installation handle 2.

The sawtooth 3 in the embodiment is provided with a tooth back 31, a tooth surface 32 and a tooth bottom surface 34, and the junction of the tooth back 31 and the tooth surface 32 is a saw cutting edge 33; the tooth holder 7 is provided with a tooth holder back 71, a tooth holder surface 72, a tooth holder top surface 73 and a tooth holder top inclined surface 74, and the tooth holder top inclined surface 74 is fixedly arranged between the sawteeth 3 and the tooth holder 7.

In this embodiment, the thickness of the saw blade body 1 is b, the thickness of the saw teeth 3 is S, S > b, and the two sides are equal.

In the embodiment, an included angle between the tooth back 31 and a horizontal plane is R1, an included angle between the tooth surface 32 and a vertical plane is R2, an included angle between the tooth back 31 and the tooth surface 32 is R3, R3 is about 80 degrees, and R1+ R2+ R3=90 degrees; the angle between the upper end of the mounting handle 2 and the horizontal plane is R7, R1 is more than R7 and R2, and R2 is less than or equal to R1-R7.

In this embodiment, the included angle between the tooth seat back 71 and the horizontal plane is R4, the included angle between the tooth seat back 71 and the tooth seat face 72 is R5, the included angle between the tooth seat face 72 and the vertical plane is R6, R6 is 0 °, and R4+ R5+ R6=90 °.

The included angle between the tooth back 31 and the horizontal plane in the embodiment is R1 and R1, which are called tooth back angles.

The included angles between the tooth surface 32 and the vertical surface in the present embodiment are referred to as R2, R2 as tooth rake angles.

The included angles between the tooth back 31 and the tooth surface 32 in the present embodiment are referred to as tooth wedge angles R3 and R3.

The included angle between the tooth seat back 71 and the horizontal plane in the embodiment is R4 and R4, which are called tooth seat back angles.

The included angles between the tooth seat back 71 and the tooth seat face 72 in the embodiment are R5 and R5, which are called tooth seat wedge angles.

The included angle between the tooth seat surface 72 and the vertical surface in this embodiment is referred to as the tooth seat front angle R6, R6.

The included angles between the upper end of the mounting handle 2 and the horizontal plane in the embodiment are R7 and R7, which are called as mounting handle angles.

The included angle between the tooth seat top surface 73 and the tooth seat top inclined surface 74 in the embodiment is R8 and R8, which are called welding angles.

The sawtooth 3 in the embodiment is provided with R9 and R9 which are called symmetrical included angles before sawtooth welding.

The included angle between the central line of the saw tooth 3 and the vertical surface in the angle welding process in the embodiment is R10.

The gaps W1 and W1 between the tooth surface 32 and the tooth seat surface 72 in the present embodiment are referred to as tooth rake gaps.

The width of the block top surface 73 in this embodiment is referred to as W2, W2 as the block relief substrate width.

The width of the tooth holder top bevel 74 in this embodiment is W3, W3 referred to as the tooth holder front angle width.

The width of the saw teeth 3 in the present embodiment is W4, W4 saw tooth width.

The root 9 in this embodiment has a radius R, which is referred to as the root circle radius.

The distance d between the sawing edge 33 and the tooth root 9 in this embodiment is referred to as the tooth height.

The distances d1, d1 between the tooth root 9 and the carrier top surface 73 in this embodiment are referred to as the carrier top height.

The height d2 and d2 of the sawteeth 3 welded on the tooth base 7 in the embodiment are called as the height of the teeth after welding.

The height of the pre-welding serrations 3 in this embodiment d3, d3 is referred to as the pre-welding serration height.

The height of the serrations 3 during welding in the present embodiment is d4 and d4, which is referred to as the tooth height during welding.

The height of the intersection point to the top of the sawtooth 3 in this embodiment is d 5.

The width of the mounting shank 2 in this embodiment is a, which is referred to as the mounting shank width.

The length of the blade in this embodiment is L, which is referred to as the blade length.

The width of the saw blade in this embodiment is W, which is referred to as the blade width.

The thickness b of the saw blade body 1 in this embodiment is referred to as a blade thickness.

The thickness of the saw teeth 3 in this embodiment is S, S referred to as the saw tooth thickness.

The width of the mounting shank 2 in this embodiment is referred to as "a" and "a" as "shank width".

The distance between adjacent saw teeth 3 in this embodiment is P, P called the pitch.

The maximum distances P1 and P1 between the tooth back 71 and the tooth seat face 72 in this embodiment are called tooth tip widths.

In the present embodiment, an arc M is provided at the joint of the sawtooth 3 and the tooth holder 7, the center of the arc M is the center point O, and a contact point O1 is provided at the joint of the tooth back 31 and the tooth holder back 71.

Specifically, the saw blade body 1 and the saw teeth 3 are welded, and the alloy reciprocating saw blade is installed through the installation handle 2 and is fixedly positioned on a tool through the fixing hole 8, so that the alloy reciprocating saw blade and the tool are connected into a whole for operation.

The front end of the head part 4 protrudes out of the saw blade body 1, the saw back 6 is arranged in a linear structure, and the two are in transition into a whole; the head 4 is in a triangular structure, the front end of the head is protruded, the head is in linear belt inclination transition to the saw back 6, and the saw back 6 is in a linear structure.

The mounting handle 2 is designed in a general shape, the matching shape of the interface can be changed according to different requirements of market matching tools in a connecting mode, the saw blade body 1 can be designed in different shapes and sizes according to application working conditions, and the general structure and size tolerance design meet the assembling matching requirements of the market general matching tools; the upper contour line of the mounting handle 2 is in transition connection with the saw back 6, a concave platform is arranged on the saw back 6 at the tail end of the connection part, and a certain angle is formed between the mounting handle 2 and the saw back 6.

The center of the fixing hole 8 is matched with the center of the rear end of the connecting shaft of the matched tool, the appearance of the mounting handle 2 is matched with the mounting space of the matched tool, the mounting with the matched tool is convenient, quick, correct and firm, and the use safety and performance requirements are ensured.

The tooth holders 7 are uniformly distributed on the lower part of the saw blade body 1 in a linear manner; the straight toothless seat 7 in the length range of the concave platform of the saw back 6 corresponding to the position close to the mounting handle 2 is in transition connection with the contour line of the mounting handle 2; the number of the tooth holders 7, i.e. the number of teeth, and the shape of the teeth 3 can be varied to suit different application effects and needs, while the main structure and the matching requirements are maintained.

The alloy reciprocating saw blade is formed by transiting and enclosing a head part 4, a saw back 6, a mounting handle 2 and saw teeth 3.

The tooth bottom surface 34 is provided in an arc belt-shaped structure, and is formed by symmetrical triangles of the tooth back 31 and the tooth surface 32 which are linear on the front and back sides, and the saw cutting edge 33 is formed by the intersection line of the tooth back 31 and the tooth surface 32.

The head 4, the side face 5 and the saw back 6 are designed into different shapes and sizes according to application function requirements, and are not limited to linear, curved and embedded structures.

The tooth holder 7 is composed of a tooth holder back 71, a tooth holder surface 72 and a tooth holder top surface 73, all of which are in an angular linear structure, and adjacent tooth holders 7 are in transition connection through tooth roots 9 with radian.

The alloy reciprocating saw blade is formed by welding a saw blade body 1 and saw teeth 3 at a tooth base top surface 73 and a tooth bottom surface 34.

The distance between two adjacent saw cutting edges 33 is a pitch P, and 3 numbers of saw teeth TPI are uniformly distributed in an inch range, and are uniformly distributed as 6TPI preferably; the arc connected with the adjacent progress of the tooth root 9 is the tooth root radius R, and the distance from the top point of the arc to the top point of the sawing blade 33 is the tooth height d; the tooth seat back 71, the tooth seat surface 72 and the tooth seat top surface 73 are all provided with certain angles, the angle of the tooth back 31 is a tooth rear angle R1, the angle of the tooth surface 32 is a tooth front angle R2, and the angles are mutually related, so that the sawtooth 3 can bear impact force during operation; the above three aspects mainly determine the cutting mode.

The distance from the saw back 6 to the saw cutting edge 33 is the blade width W, and the distance from the end point of the head 4 to the end point of the mounting shank 2 is the blade length L, corresponding to the size range of the object to be cut in the cutting mode.

The surface treatment of the alloy reciprocating saw blade may be varied according to customer requirements.

The processing technology of the alloy reciprocating saw blade in the embodiment comprises the following steps:

the tooth base 7 is provided with a tooth pitch P which corresponds to the cutting mode and the thickness of the cutting object in an evenly-divided mode, wherein P is larger than the thickness of the cutting object;

the width of the tooth seat top surface 73 is W2, and W2 is minimized under the condition that the tooth seat back 71 is not deformed during welding;

the width of the tooth seat top inclined surface 74 is W3, the gap between the tooth surface 32 and the tooth seat surface 72 is W1, the width of the sawtooth 3 is W4, the sawtooth is as large as possible under the condition of a certain value of W1, and the roughness of the whole plane is ensured, wherein W1= (W4-W3)/2;

the tooth bottom surface 34 is arranged in an arc-shaped structure, so that the instantaneous heating low-melting-point tooth holder 7 is ensured to be fused and connected with the sawteeth 3 and the tooth holder 7 in a small area around the contact without deformation under certain current density and mechanical pressure, and the contact area between the sawteeth 3 and the tooth holder 7 is ensured to be maximized after welding;

the included angle between the central line of the sawtooth 3 and the vertical plane is R10 when the central line is welded at an angle, and R10= R8, so that R2= R10-1/2R 9;

the tooth back angle R1 is formed twice, and the strength and the heat dissipation effect of the sawtooth 3 are ensured under the condition that the distance between the tooth root 9 and the tooth holder top surface 73 is controlled to be d1 minimum change and R3 is maximized;

because the hard alloy has poor bending resistance and impact resistance, the angle of a tooth front angle R2 is reduced to avoid tipping the sawing edge 33, the operation friction force factor is considered, the width of the tooth seat top surface 73 is W2, the size of W2 is reduced as much as possible, and the straightness of the whole tooth back 31 is ensured, so that the abrasion to the tooth seat 7 is reduced, the damage of the saw teeth 3 is further caused, meanwhile, the tooth seat 7 is ensured to have enough strength and heat dissipation area, and the heat dissipation performance of the saw blade body 1 and the strength and the rigidity of the tooth seat 7 are rubbed according to the maximized operation;

the radius of the tooth root 9 is R, R is determined according to laser cutting and a reasonable process proportion of the thickness of the saw blade body 1 and the diameter of an arc, stress concentration is avoided through arc-shaped design, the angle of R4 is ensured to be as small as possible, the area of the tooth holder 7 is increased, R6 is 0 DEG to ensure the maximum cutting force, and R4+ R5+ R6=90 degrees;

tests show that the welding strength needs to fully wrap the periphery of the tooth bottom surface 34 with the fused base metal and the cutting abrasion is mainly made of hard alloy with good abrasion resistance as much as possible; r1 > R2, R1+ R2+ R3=90 °;

after the sawteeth 3 are welded on the tooth holder 7, the sawteeth 3 and the tooth holder 7 have intersection points, secondary processing surfaces for secondary processing of the sawteeth 3 exist through the intersection points, and the sawteeth 3 below the secondary processing surfaces are cut off by a finished product;

under the conditions that a tooth seat, a saw tooth are fixed, the tooth back angle is equal to a certain tooth pitch P, the height d4 of the saw tooth 3 determines the sizes of d5 and d6 under the conditions of a certain welding angle R8 and a certain tooth back angle R1, d6= d2+ d3 and the final control tooth height d = d1+ d 2;

a gap W1 exists between the tooth surface 32 and the tooth seat surface 72, the two sides of the saw tooth 3 and the saw blade body 1 keep saw S more than b, and the two sides are equally divided, so that the cutting is mainly made of hard alloy with high hardness and high wear resistance.

The angle R7 of the mounting handle is set to ensure a certain cutting depth Y-direction feeding force and a certain cutting force towards the X direction during sawing, R1 is more than R7 is more than R2, R2 is controlled to be not more than R1-R7, meanwhile, the effective feed amount range of the hard alloy cutting metal is ensured, the sawtooth is prevented from being damaged by too large impact, and the efficiency is low.

The junction of sawtooth 3 and toothholder 7 is provided with circular arc M, the centre of a circle of circular arc M is central point O, the junction of tooth back 31 and toothholder top surface 73 is provided with contact O1, and central point O is less than contact O1 during the operation, effectively guarantees that operation impact force F is equallyd divide on the toothholder face 34, maximize buffering dispersion protection sawtooth 3, in order to reduce impact damage.

The hard alloy is brittle and hard, poor in toughness and high in price, so that the size is reduced as far as possible under the condition of meeting the requirements of the process and the performance, and the size can be quantitatively fixed corresponding to a cutting mode and a main cutting object.

It should be noted that all the orientation descriptions in the present application are based on fig. 1, and all the broken lines in the attached drawings are reference lines for marking the dimensions.

In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an illustration of the structure of the present invention. Equivalent or simple changes in the structure, characteristics and principles of the invention are included in the protection scope of the patent. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims (4)

1. The utility model provides a reciprocal saw blade of alloy, includes saw blade body (1), installation handle (2) and sawtooth (3), be provided with fixed orifices (8) on installation handle (2), its characterized in that: the saw blade is characterized by further comprising tooth bases (7), tooth roots (9) are arranged between every two adjacent tooth bases (7), the saw blade body (1) and the mounting handle (2) are of an integrated structure, the saw teeth (3) are fixed on the saw blade body (1) through the tooth bases (7), each saw tooth (3) comprises a tooth back (31), a tooth surface (32) and a tooth bottom surface (34), a saw cutting edge (33) is arranged at the junction of the tooth back (31) and the tooth surface (32), the head (4) is arranged at the left end of the saw blade body (1), the mounting handle (2) is arranged at the right end of the saw blade body (1), the side surfaces (5) are arranged on the front side and the rear side of the saw blade body (1), the saw back (6) is arranged at the upper end of the saw blade body (1), and the tooth bases (7) are arranged at the lower end of the saw blade body (1);

the alloy reciprocating saw blade is processed by adopting the following processing technology:

the tooth base (7) is provided with uniformly corresponding tooth pitches P according to the cutting mode and the thickness of a cutting object, wherein P is more than the thickness of the cutting object;

the width of the tooth seat top surface (73) is W2, and W2 is minimized under the condition that the tooth seat back (71) is not deformed during welding;

the width of the tooth seat top inclined surface (74) is W3, the gap between the tooth surface (32) and the tooth seat surface (72) is W1, the width of the sawtooth (3) is W4, and W1= (W4-W3)/2;

the tooth bottom surface (34) is arranged in an arc-shaped structure, the sawteeth (3) are connected with the tooth holder (7) in a fusion mode in a contact area, the contact area of the sawteeth (3) and the tooth holder (7) is maximized after welding, and the tooth holder (7) is not deformed;

an included angle between the central line of each sawtooth (3) and a vertical surface is R10 when the central line is welded at an angle, an included angle between each tooth surface (32) and the vertical surface is R2, the tooth holder top surface (73) is horizontally arranged, the tooth holder top inclined surface (74) is obliquely arranged, an included angle between the tooth holder top surface (73) and the tooth holder top inclined surface (74) is R8, R9 is arranged on each sawtooth (3), R9 is called a symmetrical included angle before sawtooth welding, R8= R2+1/2R9, R10= R8, and R2= R10-1/2R9 is guaranteed;

the tooth back angle R1 is formed in an over-molding mode, and the area of the sawtooth (3) is maximized to ensure the strength and the heat dissipation effect under the condition that the distance between the tooth root (9) and the tooth base top surface (73) is controlled to be d1 minimum change and R3 is maximized;

the welding strength and the tooth bottom surface (34) are mainly made of wear-resistant hard alloy through test tests, the included angle between the tooth back (31) and the horizontal plane is R1, the included angle between the tooth back (31) and the tooth surface (32) is R3, R1 is more than R2, and R1+ R2+ R3=90 degrees;

after the sawteeth (3) are welded on the tooth holder (7), intersection points exist between the sawteeth (3) and the tooth holder (7), and a secondary processing surface for carrying out secondary processing on the sawteeth (3) exists through the intersection points;

because the hard alloy has poor bending resistance and impact resistance, the angle of a tooth front angle R2 is reduced to avoid breaking a sawing edge (33), the size of W2 is reduced and the straightness of the plane of the tooth top surface (73) and the whole tooth back (31) is ensured by considering the factor of operational friction force and the width of the tooth top surface (73) is W2, so that the abrasion to the tooth base (7) is reduced, the sawtooth (3) is damaged, and the strength and the heat dissipation area of the tooth base (7) are ensured;

the radius of the tooth root (9) is R, the R is determined according to laser cutting and the ratio of the thickness of the saw blade body (1) to the diameter of an arc, the arc design avoids stress concentration, the angle of R4 is reduced simultaneously to increase the area of the tooth seat (7), the included angle between the tooth seat back (71) and the horizontal plane is R4, the included angle between the tooth seat back (71) and the tooth seat surface (72) is R5, the included angle between the tooth seat surface (72) and the vertical plane is R6, R6 is 0 DEG, maximized cutting force is ensured, and R4+ R5+ R6=90 DEG;

a gap W1 exists between the tooth surface (32) and the tooth seat surface (72), the thickness of the saw blade body (1) is b, the thickness of the saw teeth (3) is S, and the two side surfaces of the saw teeth (3) and the saw blade body (1) keep sawing S & gt b and are evenly divided so as to facilitate chip discharging;

toothholder (7) are including toothholder back of the body (71), toothholder face (72), toothholder top surface (73) and toothholder top inclined plane (74), toothholder top inclined plane (74) is fixed the setting between sawtooth (3) and toothholder (7), sawtooth (3) are provided with circular arc (M) with the junction of toothholder (7), the centre of a circle of circular arc (M) is central point (O), the junction of toothholder back of the body (31) and toothholder top surface (73) is provided with contact (O1), and central point (O) are less than contact (O1) during the operation, effectively guarantee operation impact force (F) the equipartition on toothholder face (34), maximize buffering dispersion protection sawtooth (3) in order to reduce the impact damage.

2. The alloy reciprocating saw blade of claim 1, wherein: an included angle between the upper end of the mounting handle (2) and the horizontal plane is R7, wherein R1 is more than R7 and R2, and R2 is not more than R1-R7.

3. The alloy reciprocating saw blade of claim 2, wherein: the angle R7 of the mounting handle is set to ensure a certain cutting depth Y-direction feeding force and a certain cutting force towards the X direction during sawing, R1 is more than R7 is more than R2, R2 is controlled to be not more than R1-R7, meanwhile, the effective feed amount range of the hard alloy cutting metal is ensured, the sawtooth is prevented from being damaged by too large impact, and the efficiency is low.

4. The alloy reciprocating saw blade of claim 1, wherein: the hard alloy is brittle and hard, poor in toughness and high in price, so that the size is reduced as far as possible under the condition of meeting the requirements of the process and the performance, and the size can be quantitatively fixed corresponding to a cutting mode and a main cutting object.

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