Method for manufacturing a band saw blade

Abstract

The present application relates to a kind of manufacturing method of band saw blade, the thickness direction of raw material steel band 2 edges are respectively carried out edge treatment, obtain the steel band with 2 straight angle edges;After the steel band is sequentially leveled and straightened, tooth is milled, and the strip with tooth support is formed;After the strip is sequentially heat treated and roll straightening, it is welded, and the band saw blade rough cast is obtained;After the band saw blade rough cast is sequentially rolled and ground, the band saw blade finished product is obtained;Or, after the band saw blade rough cast is sequentially ground and rolled, the band saw blade finished product is obtained;Wherein, roll processing includes the step of at least one region between the tooth groove and the bottom edge of the band saw blade rough cast is rolled;The region extends along the length direction of the band saw blade rough cast, and the width of the region is less than the distance between the tooth groove and the bottom edge of the band saw blade rough cast.The present application can effectively enhance the rigidity of the back material of the band saw blade by rolling the partial region of the back material of the band saw blade, which helps to improve the service life of the band saw blade.

Description

TECHNICAL FIELD

[0001] The application relates to a manufacturing method of a band saw blade, in particular to a manufacturing method of a bimetal band saw blade, and belongs to the band saw blade field. BACKGROUND

[0002] The bimetal band saw blade is widely used in the metal and nonmetal cutting field, and due to the change of market and customer demand, the customer's requirements for the sawing efficiency and sawing life are continuously improved. Generally, the manufacturing process route of the existing high-speed sawing bimetal band saw blade is as shown in the figure, and generally comprises edge trimming, leveling and straightening, length preparation, tooth milling, heat treatment, one-stage roll straightening, welded head, tooth grinding and two-stage roll straightening. Figure 1

[0003] The high-speed sawing has higher requirements for the S-bend of the band saw blade product, the S-bend of the conventional production process cannot be effectively controlled, the average level of the S-bend in the industry is only 0.30-0.50 mm / 450 mm, and the quality fluctuation of the high-speed sawing band saw blade product itself and the sawing process is large. Meanwhile, the high-speed sawing has higher requirements for the rigidity and fatigue of the band, and the existing production process often occurs fatigue breakage failure of the back. Since the running speed of the band saw blade in the high-speed sawing process can reach 1500-2800 m / min, once the breakage occurs in the running process, a safety accident is easily caused. Since the high-speed sawing has higher requirements for the rigidity of the band, due to the material limitation, an effective breakthrough in improving the rigidity of the band has not been made, and the service life of the high-speed sawing band saw blade product in the industry still has a large gap with the imported product. SUMMARY

[0004] In view of the defects of the prior art, the purpose of the application is to provide a manufacturing method of a band saw blade with long service life.

[0005] In order to solve the above technical problems, the technical scheme of the application is as follows:

[0006] A manufacturing method of a band saw blade comprises the following steps:

[0007] S1, providing a raw material steel band;

[0008] S2, respectively trimming the edges of the thickness direction of the raw material steel band to obtain a steel band with two right-angle edges;

[0009] S3, sequentially leveling and straightening the steel band and tooth milling to form a strip with a tooth holder;

[0010] S4, sequentially heat treating and roll straightening the strip, and welding a hard alloy head to the tooth holder of the strip to obtain a band saw blade roughcast;

[0011] ​S5, sequentially performing roll processing and tooth grinding on the band saw blade blank to obtain a band saw blade product; or sequentially performing tooth grinding and roll processing on the band saw blade blank to obtain a band saw blade product;

[0012] The roll processing includes the step of rolling at least two regions between the tooth groove and the bottom edge of the band saw blade blank by rollers; the regions extend along the length direction of the band saw blade blank, and the width of the regions is less than the distance between the tooth groove and the bottom edge of the band saw blade blank.

[0013] Further, in S5, two oppositely arranged rollers are used to roll the corresponding regions; when rolling, one roller rollably abuts one side surface of the band saw blade blank, and the other roller rollably abuts the other side surface of the band saw blade blank.

[0014] Further, in S5, the number of the regions is greater than or equal to 3, preferably 3-6, more preferably 4-5, and each region is sequentially distributed along the width direction of the band saw blade blank, and each region does not overlap and does not abut with each other; a plurality of pairs of oppositely arranged rollers are used for rolling, the number of the pairs of oppositely arranged rollers is the same as the number of the regions, and each pair of oppositely arranged rollers rolls one region in each region.

[0015] Further, in S5, the number of the regions is greater than or equal to 3, preferably 3-6, more preferably 4-5, and each region is sequentially distributed along the width direction of the band saw blade blank, and each region does not overlap and does not abut with each other.

[0016] Preferably, each region is parallel to each other.

[0017] Further, the distance between the region and the tooth groove of the band saw blade blank is greater than or equal to 2 mm, preferably 3-6 mm, more preferably 4-5 mm; and the distance between the region and the bottom edge of the band saw blade blank is greater than or equal to 2 mm, preferably 3-6 mm, more preferably 4-5 mm.

[0018] Further, the region includes a first region, a second region and a third region sequentially distributed from the tooth groove to the bottom edge of the band saw blade blank, the distance between the first region and the tooth groove of the band saw blade blank is 2-5 mm, preferably 2.5-4 mm; the distance between the center axis of the second region and the bisector of the section between the tooth groove and the bottom edge of the band saw blade blank is 2-5 mm, preferably 2.5-4 mm; and the distance between the third region and the bottom edge of the band saw blade blank is 2-5 mm, preferably 2.5-4 mm.

[0019] Further, the rolling treatment is performed by a rolling mechanism, the rolling mechanism comprises a base, a first rolling device and a second rolling device mounted on the base, the first rolling device and the second rolling device are oppositely arranged in a first direction, the first rolling device is provided with at least two first rollers, the second rolling device is provided with at least two second rollers, the at least two first rollers and the at least two second rollers are arranged in a second direction, and each first roller and each second roller are oppositely arranged and rotatable to form at least two compressive stresses, thereby achieving rolling of at least two regions.

[0020] Further, the at least two first rollers are coaxially arranged, and the at least two second rollers are coaxially arranged; in this way, the rolling treatment of at least two regions can be completed in one process, thereby effectively improving the efficiency of the rolling treatment.

[0021] Preferably, the number of first rollers is three, and the number of second rollers is three; the diameters of each first roller are the same, the diameters of each second roller are the same, or the diameter of the first roller located at the middle position is 0.05-0.15 mm larger than the diameters of the other two first rollers (more preferably 0.75-1.25 mm larger), and the diameter of the second roller located at the middle position is 0.05-0.15 mm larger than the diameters of the other two second rollers (more preferably 0.75-1.25 mm larger). In this way, by differentiating the diameters of the rollers, different compressive stresses can be applied to different regions in one process, which helps to better reduce the saw blade vibration and improve the service life.

[0022] Further, the pressure of the rolling is 1-3 MPa, more further 1.25-2.75 MPa, preferably 1.5-2.5 MPa.

[0023] More further, the pressure applied by the first roller and the second roller located at the middle position to the band saw blade roughcast is greater than the pressure applied by the other two first rollers and the other two second rollers to the band saw blade roughcast.

[0024] Further, during the heat treatment, the strip is quenched at 1000-1050℃ for 2-6 min, then tempered at 600-650℃ for 2-8 min, cooled to room temperature, and the above quenching, tempering and cooling processes are further repeated for 1-3 times, and the heat treatment is completed. Preferably, the quenching is online quenching, and the tempering is online tempering.

[0025] During the sawing process of the band saw blade, the positions close to the tooth groove and the bottom are positions with relatively large stress, and three rollers are arranged in the rolling mechanism, which can correspond to the tooth groove, the middle position and the position close to the bottom (i.e. near the bottom edge) of the band saw blade, and the compressive stress is enhanced to achieve the purpose of enhancing the rigidity of the back material of the band saw blade.

[0026] Preferably, the rolling mechanism further comprises a first driving mechanism and a second driving mechanism mounted on the base, the first driving mechanism is used to drive the first rolling device to move in the first direction to move closer or farther away from each other; the second driving mechanism is used to drive the second rolling device to rotate to form the compressive stress.

[0027] Preferably, the first rolling device further comprises a first mandrel, a first mounting seat and a first end cover; the second rolling device further comprises a second mandrel, a second mounting seat, a second end cover and a shaft coupling; the first driving mechanism is connected with the first mounting seat, and the first mounting seat is slidingly arranged on the base; the second mounting seat is connected with the bottom of the base;

[0028] The first mandrel is rotatably arranged in the first mounting seat, one end of the first mandrel extends to the outside of one end of the first mounting seat for mounting the first roller, and the other end of the first mandrel extends to the outside of the other end of the first mounting seat and is fixed with the first mounting seat through the first end cover;

[0029] The second mandrel is rotatably arranged in the second mounting seat, one end of the second mandrel extends to the outside of one end of the second mounting seat for mounting the second roller, and the other end of the second mandrel extends to the outside of the other end of the second mounting seat and is connected with the second driving mechanism through the shaft coupling, and the second mandrel is fixed with the second mounting seat through the second end cover.

[0030] Preferably, a T-shaped nut is arranged on the first rolling device, and a T-shaped screw is arranged on the first driving mechanism and connected with the T-shaped nut.

[0031] Further, the rolling mechanism is arranged on a rolling device, the rolling device comprises a base, a supporting seat arranged on the base, a pressing mechanism and the rolling mechanism as described above, the base is arranged on the base, the supporting seat and the pressing mechanism are arranged at two ends of the rolling mechanism in the third direction, the supporting seat is provided with a supporting plate, the upper surface of the supporting plate is flush with the upper surface of the second roller, and the pressing mechanism is opposite to the supporting plate and forms a damping force.

[0032] Preferably, each of the supporting seats is provided with a first adjusting mechanism for adjusting the position of the supporting plate and the rolling mechanism in the second direction; the supporting seat near the front side of the rotating direction of the first roller and the second roller is provided with a second adjusting mechanism, and the second adjusting mechanism is used to adjust the position of the supporting plate in the first direction.

[0033] Preferably, the first adjusting mechanism comprises a first mounting plate, a first adjusting rod and a linear bearing, the bottom of the support base is provided with a second adjusting rod; one end of the first mounting plate is connected with the support base, the other end is provided with the linear bearing for the first adjusting rod to pass through, the bottom of the second adjusting rod is inserted into the first adjusting rod; one end of the first adjusting rod is connected with an adjusting handle, the other end is connected with the base.

[0034] Preferably, the second adjusting mechanism comprises a second mounting plate and an adjusting screw, the second mounting plate is connected with the support base below the support plate, the adjusting screw is threadedly connected with the second mounting plate in the first direction, and the end of the adjusting screw is connected with the bottom of the support plate.

[0035] Preferably, the rolling device further comprises a polishing mechanism arranged beside the rolling mechanism, the polishing mechanism is located at the rear side of the rotating direction of the first roller and the second roller, and the polishing mechanism is provided with a grinding wheel rotating in the first direction. In this way, the polishing mechanism is integrated in the rolling device, the bottom of the completed band saw blade rough blank is polished immediately after rolling, the damage to the bottom of the band saw blade is reduced, the stress concentration point of the band is reduced, the rigidity of the back material of the band saw blade is enhanced, the fatigue life of the band saw blade is improved, and the service life is improved.

[0036] Further, the rolling device is used for rolling processing, comprising the following steps:

[0037] 1) The band saw blade rough blank is divided into at least two rolling areas along the width direction, and at least two first rollers and at least two second rollers are installed according to the positions of the at least two rolling areas;

[0038] 2) The band saw blade rough blank is input into the rolling mechanism through the damping force applied by the pressing mechanism and the support plate, and the rolling force applied by the rolling mechanism on the band saw blade rough blank comprises the pressure stress of the relative rotation of the first roller and the second roller and the pressure stress of the downward movement of the first roller;

[0039] 3) The band saw blade rough blank after rolling is output from the rolling mechanism through the damping force applied by the pressing mechanism and the support plate; the rolling of the band saw blade rough blank is completed, and the finished band saw blade is obtained.

[0040] Further, the width of the area is 1.5-5mm, preferably 2-4mm, more preferably 2.5-3.5mm.

[0041] Further, S4, after the strip is sequentially heat treated, roll straightened, the strip is wound to form a strip roll, the back of the strip roll is ground by a surface grinder, and the hard alloy cutter head is welded to the tooth holder of the strip to obtain a band saw blade rough blank. In this way, between the roll straightening and welding, the strip after winding is ground flat, the S-bend level of the bottom edge of the strip can be reduced from 0.30-0.50mm / 450mm to 0.02-0.05mm / 450mm, which greatly reduces the S-bend level of the strip. Although an additional winding and unwinding process is added, the optimization of the S-bend level can effectively improve the positioning accuracy during welding by relying on the bottom edge of the strip, thereby effectively improving the welding quality and stability of the hard alloy cutter head. In addition, it can also greatly improve the isohypse control level during subsequent tooth grinding, effectively guarantee the tooth grinding quality and stability, and help to effectively reduce the occurrence of tooth tip chipping and other situations during the service of the final obtained band saw blade product during high-speed sawing, and improve the sawing life of the tooth part.

[0042] Compared with the prior art, the beneficial effects of the present application are as follows:

[0043] (1) The present application can effectively enhance the rigidity of the back material of the band saw blade by rolling the back material of the band saw blade, which helps to improve the service life of the band saw blade.

[0044] (2) The present application can effectively improve the high-speed sawing performance of the band saw blade by rolling the back material to improve the rigidity of the back material, thereby avoiding the shaking phenomenon during high-speed sawing (shaking during sawing will cause the tooth part to be subjected to force that is large and small, the tooth tip to be subjected to uneven force, and the tooth tip to be prone to chipping, thereby increasing the resistance during cutting and reducing the service life of the band saw blade; it also easily leads to cutting skewing and other problems), thereby making the band saw blade used for high-speed sawing also have a higher service life, and the comprehensive life can be improved by 40%, reaching or exceeding the level of foreign competitors.

[0045] (3) The process of the present application has low investment cost and high benefit.

[0046] (4) The performance, quality stability and reliability of the band saw blade product obtained by the present application are significantly improved, the processing quality is stable and reliable, and the user's satisfaction can be effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0047] Figure 1 is a manufacturing process route diagram of an existing high-speed sawing bimetallic band saw blade.

[0048] Figure 2 is a manufacturing process route diagram of a high-speed sawing bimetallic band saw blade of Example 1.

[0049] Figure 3 is a first perspective view of the rolling equipment of Example 1.

[0050] Figure 4 Structure diagram of the rolling mechanism of Example 1.

[0051] Figure 5 Structure diagram of the first rolling device of Example 1.

[0052] Figure 6 Front structure diagram of the rolling device of Example 1.

[0053] Figure 7 Perspective structure diagram of the rolling device of Example 1 from a second perspective.

[0054] Figure 8 Structure diagram of the polishing mechanism of Example 1.

[0055] Figure 9 Diagram of the band saw blade rough blank divided into regions of Example 1.

[0056] Figure 10 Actual photograph of the bottom of the band saw blade before polishing of Example 1.

[0057] Figure 11 Actual photograph of the bottom of the band saw blade after polishing of Example 1.

[0058] Figure 12 Manufacturing process route diagram of the high-speed sawing bimetallic band saw blade of Example 2.

[0059] In the drawings: 1, rolling mechanism; 11, first rolling device; 111, first mandrel; 112, first mounting seat; 113, first roller; 114, first end cover; 115, locking nut; 116, T-shaped nut; 117, bearing; 118, gland; 12, second rolling device; 121, second mandrel; 122, second mounting seat; 123, second roller; 124, second end cover; 125, shaft coupling; 13, base; 14, first driving mechanism; 141, third mounting seat; 142, oil cylinder; 143, T-shaped screw; 15, second driving mechanism; 16, inlet; 17, outlet;

[0060] 2, base; 3, support seat; 31, support plate; 32, second adjusting rod; 33, limit bearing; 4, first adjusting mechanism; 41, first mounting plate; 42, first adjusting rod; 43, linear bearing; 44, adjusting handle; 5, second adjusting mechanism; 51, second mounting plate; 52, adjusting screw; 6, limiting mechanism; 61, third mounting plate; 62, limiting screw; 7, pressing mechanism; 71, air cylinder; 72, pressing wheel; 8, polishing mechanism; 81, grinding wheel; 9, band saw blade; 91, region; 92, bottom edge; 93, tooth groove. DETAILED DESCRIPTION

[0061] The application will be described in detail below with reference to the embodiments. It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other without conflict. For the convenience of description, if the terms “up”, “down”, “left” and “right” appear in the following, they only mean the up, down, left and right directions of the drawings themselves, and do not limit the structure.

[0062] Embodiment 1

[0063] Referring to Figure 2 The manufacturing method of the band saw blade (TCB PRO AL 41*2 / 3) of the embodiment comprises the following steps:

[0064] S1, providing a raw steel strip (spring steel strip, material X32, width 41 mm, thickness 1.33 mm);

[0065] S2, using a forming blade to perform edge trimming on two edges of the raw steel strip in the thickness direction respectively, to obtain a steel strip with two right-angle edges;

[0066] S3, leveling and straightening the steel strip to eliminate the knife bend and tortoise back, twisted deformation and the like of the raw material, to obtain a steel strip with a knife bend of 15-25 mm / 6000 mm and an S-bend level of 0.30-0.50 mm / 450 mm;

[0067] After the steel strip after leveling and straightening is cut and rolled, the teeth are milled (milled by a forming milling cutter), to form a strip with a tooth holder;

[0068] S4, quenching the strip at 1030 ℃ for 3 min, then tempering at 630 ℃ for 5 min, and cooling to room temperature, and further repeating the quenching, tempering and cooling process twice, to obtain a strip with an S-bend level of 0.25-0.40 mm / 450 mm and a hardness of 430-500 HV;

[0069] After the strip after the above heat treatment is rolled and straightened, a strip with a knife bend of 0-5 mm / 6000 mm is obtained; after the strip is wound to form a strip roll, the back of the strip roll is ground by a surface grinder, and a strip with an S-bend level of 0.02-0.05 mm / 450 mm at the bottom edge of the strip is obtained;

[0070] Then, a hard alloy (H10F) tool bit is welded to the tooth holder of the strip by a resistance welding process, to obtain a band saw blade roughcast;

[0071] S5, grinding the teeth, roll pressing the band saw blade roughcast in sequence, polishing, spraying code and oiling, and storing in the warehouse, to obtain a band saw blade finished product;

[0072] The rolling treatment includes the steps of rolling the three regions between the tooth groove and the bottom edge of the band saw blade rough blank; the regions extend along the length direction of the band saw blade rough blank, and the width of the regions is less than the distance between the tooth groove and the bottom edge of the band saw blade rough blank; and the rolling pressure is controlled to be 1.5 MPa.

[0073] In S5, two oppositely arranged rollers are used to roll the corresponding regions; when rolling, one roller is rollably abutted with one side surface of the band saw blade rough blank, and the other roller is rollably abutted with the other side surface of the band saw blade rough blank.

[0074] The regions are sequentially distributed along the width direction of the band saw blade rough blank, and the regions are not overlapped, not adjacent and parallel to each other; three pairs of oppositely arranged rollers are used for rolling, and each pair of oppositely arranged rollers rolls one region of the three regions.

[0075] The regions include a first region, a second region and a third region sequentially distributed from the tooth groove to the bottom edge of the band saw blade rough blank, the distance between the first region and the tooth groove of the band saw blade rough blank is 3 mm; the distance between the center axis of the second region and the bisector of the section between the tooth groove and the bottom edge of the band saw blade rough blank is 0 mm; and the distance between the third region and the bottom edge of the band saw blade rough blank is 3 mm. The width of each region is 3 mm.

[0076] Referring to Figures 3-11 , the rolling treatment is performed by a rolling mechanism, the rolling mechanism is arranged on a rolling device, and the rolling device includes the rolling mechanism 1, a base 2, a support seat 3, a first adjusting mechanism 4, a second adjusting mechanism 5, a limiting mechanism 6, a pressing mechanism 7 and a polishing mechanism 8. The rolling mechanism includes a base 13, first and second rolling devices 11 and 12 arranged on the base 13, a first driving mechanism 14 and a second driving mechanism 15, the first and second rolling devices 11 and 12 are oppositely arranged on the base 13, the first and second rolling devices 11 and 12 are oppositely arranged in a first direction Z, the first rolling device 11 is provided with three first rollers 113, the second rolling device 12 is provided with three second rollers 123, the three first rollers 113 and the three second rollers 123 are arranged in a second direction Y, and each first roller 113 and each second roller 123 are oppositely arranged and rotatable to form three pressure stresses, thereby rolling the three regions. The first driving mechanism 14 is used to drive the first rolling device 11 to move in the first direction Z to move closer or farther away from the first rolling device 11. The second driving mechanism 15 is used to drive the second rolling device 12 to rotate to form the pressure stresses.

[0077] The three first rollers 113 are coaxially arranged, and the three second rollers 123 are coaxially arranged; the number of the first rollers 113 is three, and the number of the second rollers 123 is three; the diameters of the first rollers 113 are the same, and the diameters of the second rollers 123 are the same.

[0078] Specifically, as shown in the figure, the first roller device 11 further comprises a first mandrel 111, a first mounting base 112, a first end cover 114, a locking nut 115, a T-shaped nut 116 and a bearing 117. The second roller device 12 further comprises a second mandrel 121, a second mounting base 122, a second end cover 124, a shaft coupling 125 and the same locking nut 115 and bearing 117 as in the first roller device 11. Figure 5 The second mounting base 122 is connected with the bottom of the base 13. The second mandrel 121 is rotatably arranged in the second mounting base 122 through the bearing 117, and one end of the second mandrel 121 extends to the outside of one end of the second mounting base 122 for mounting the second roller 123, and the other end of the second mandrel 121 extends to the outside of the other end of the second mounting base 122 and is connected with the second driving mechanism 15 through the shaft coupling 125, and the second mandrel 121 is fixed with the second mounting base 122 through the screw by the second end cover 124. The second driving mechanism 15 is a driving motor. The two ends of the second mandrel 121 are sleeved with bearings 117, and the bearing 117 close to the second roller 123 is fixed by the locking nut 115 arranged at the end of the second mandrel 121. The second end cover 124 is used to define the outer ring of the bearing 117. The second mandrel 121 is sleeved with a gland 118 for abutting with the inner ring of the bearing 117. The second mandrel 121 is also sleeved with a locking nut 115 for defining the position of the gland 118.

[0079] The first driving mechanism 14 comprises a third mounting base 141, an oil cylinder 142 and a T-shaped screw rod 143. The third mounting base 141 is inserted into the top of the base 13 in the first direction Z. The oil cylinder 142 is mounted in the third mounting base 141, and the telescopic rod of the oil cylinder 142 is provided with the T-shaped screw rod 143 at the end.

[0080]

[0081] ​The first mounting base 112 is slidingly assembled in the base 13, and the first mounting base 112 is above the second mounting base 122. The first mandrel 111 is rotatably arranged in the first mounting base 112 through bearings 117, and one end of the first mandrel 111 extends to the outside of one end of the first mounting base 112 for mounting the first roller 113, and the other end of the first mandrel 111 extends to the outside of the other end of the first mounting base 112 and is fixed with the first mounting base 112 through a first end cover 114. The two ends of the first mandrel 111 are both sleeved with bearings 117, and the bearing 117 close to the first roller 113 is fixed through a locking nut 115 arranged at the end of the first mandrel 111. The first end cover 114 is used for defining the outer ring of the bearing 117, and the first mandrel 111 is sleeved with a gland 118 for abutting with the inner ring of the bearing 117. The first mandrel 111 is also sleeved with a locking nut 115 for defining the position of the gland 118. The first mounting base 112 is provided with a T-shaped nut 116, and a T-shaped screw 143 is connected with the T-shaped nut 116, so that the locking function of the connection can be better realized, and the transmission can be better.

[0082] As shown in Figure 3 , Figure 6 , the roller mechanism 1 is arranged at the upper end of the base 2, and the band saw blade rough blank 9 passes through the first roller device 11 and the second roller device 12 to form an inlet 16 and an outlet 17. The base 2 is also provided with a support seat 3, which is arranged on the inlet 16 side and the outlet 17 side of the roller mechanism 1, so as to provide the movement resistance of the band saw blade rough blank 9 when entering and outputting the roller mechanism 1, and to ensure that the band saw blade rough blank 9 enters and outputs along the tangent direction of the second roller 123.

[0083] As shown in Figure 6 , Figure 7 , the support seat 3 includes a support plate 31 and a second adjusting rod 32. The upper surface of the support plate is flush with the upper surface of the second roller 123, the pressing mechanism 7 is arranged on the support seat 3, and the pressing mechanism 7 and the support plate 31 form a damping force extending in the third direction X. The band saw blade rough blank 9 is discharged from the inlet 16 from the discharge tray, and after the roller pressing is completed, it is output from the outlet 17 and then wound on the receiving tray. In this process, the band saw blade rough blank 9 has a walking speed, which cannot be too fast during roller pressing. Therefore, in order to limit the speed, the pressing mechanism 7 is arranged to generate resistance. In addition, through the clamping structure of the pressing mechanism 7 and the support plate 31, the band saw blade rough blank 9 is straight and stable when entering the roller mechanism 1. The pressing mechanism 7 includes a cylinder 71 and a pressing wheel 72 arranged at the end of the telescopic rod of the cylinder 71. By the extension and contraction of the cylinder 71, the position of the pressing wheel 72 is adjusted, so that the pressing wheel 72 is in contact with the band saw blade rough blank 9. As shown in Figure 5As shown, the bottom of the support plate 31 is provided with a second adjusting rod 32 extending in the first direction Z.

[0084] As shown, each of the support seats 3 is provided with a first adjusting mechanism 4 for adjusting the position of the support plate 31 and the roller pressing mechanism 1 in the second direction Y. The support seat 3 near the front side (and the entrance 16 side) of the rotating direction of the first roller 113 and the second roller 123 is provided with a second adjusting mechanism 5 for adjusting the position of the support plate 31 in the first direction Z. Figure 3

[0085] The first adjusting mechanism 4 comprises a first mounting plate 41, a first adjusting rod 42 and a linear bearing 43. One end of the first mounting plate 41 is connected with the support seat 3, and the other end is provided with the linear bearing 43 through which the first adjusting rod 42 passes. The bottom of the second adjusting rod 32 is inserted into the first adjusting rod 42. One end of the first adjusting rod 42 on the first adjusting mechanism 4 at both ends is connected through an adjusting handle 44, and the other end of the first adjusting rod 42 is connected with the base 13.

[0086] Push or pull the adjusting handle 44 to drive the first adjusting rod 42 to move in or out, thereby adjusting the position of the support seat 3 and the base 13 in the second direction Y through the second adjusting rod 32.

[0087] As shown, the limiting mechanism 6 comprises a third mounting plate 61 and a limiting screw 62. One end of the third mounting plate 61 is connected at the bottom of the support seat 3, and the other end is threaded through the first adjusting rod 42. The limiting screw 62 is threaded on the side wall of the third mounting plate 61, and the end of the limiting screw 62 is in contact with the first adjusting rod 42. The position of the first adjusting rod 42 is limited by the limiting mechanism 6. Figure 7 The second adjusting mechanism 5 comprises a second mounting plate 51 and an adjusting screw 52. The second mounting plate 51 is connected with the support seat 3 below the support plate 31, and the adjusting screw 52 is threaded with the second mounting plate 51 in the first direction Z, and the end of the adjusting screw 52 is connected with the bottom of the support plate 31. The height of the support plate 31 is adjusted by the second adjusting mechanism 5. In addition, in order to facilitate the adjustment of the height of the support plate 31, the bottom of the support plate 31 is provided with a linear guide rail connected with the support seat 3. The roller will be worn during use, and as the number of grinding increases, the outer diameter of the roller becomes smaller, causing the band saw blade rough blank 9 to be unable to effectively adhere to the support plate 31. Therefore, the second adjusting mechanism 5 is used to raise the support plate 31, so that it is completely adhered to the band saw blade rough blank 9, and the pressing mechanism 7 exerts force on the band saw blade rough blank 9 together.

[0088]

[0089] ​​In addition, according to the "M" type, "W" type, and "arc" type of the back of the band saw blade rough 9, the second adjusting mechanism 5 is used to adjust the center position (upward or downward) of the supporting plate 3 relative to the first roller 113 and the second roller 123, so as to achieve the effect of rolling different backs.

[0090] As shown in Figure 3 , Figure 8 The polishing mechanism 8 is arranged beside the rolling mechanism 1, and the polishing mechanism 8 is located at the rear side (and the outlet 17 side) of the rotating direction of the first roller 113 and the second roller 123. The polishing mechanism 8 is provided with a grinding wheel 81 rotating in the first direction Z.

[0091] As shown in Figure 3 , the supporting seat 3 is further provided with a limiting bearing 33, which is arranged on the outlet 17 side and always in contact with the bottom of the band saw blade rough 9.

[0092] Specifically, the rolling process using the above-mentioned rolling equipment includes the following steps:

[0093] Step S51, the width of the band saw blade rough 9 is divided into three regions 91 (as shown in Figure 7 ), and three first rollers 113 and three second rollers 123 are installed according to the positions of the three rolling regions. The three rolling regions are distributed corresponding to the positions close to the tooth groove of the band saw blade rough 9, the middle position of the band saw blade rough 9, and the position close to the bottom of the band saw blade rough 9. By enhancing the pressure stress of the band saw blade rough 9 at these three positions in the form of rolling, the purpose of enhancing the rigidity of the back material of the band saw blade rough 9 is achieved.

[0094] Step S52, adjust the position of the supporting seat 3 and the first roller 113 and the second roller 123. Because the bottom of the band saw blade rough 9 is always in contact with the limiting bearing 33 to form a positioning reference. Then, the first adjusting mechanism 4 is used to adjust the position of the first roller 113, the second roller 123, and the supporting plate 31 relative to the reference in the second direction Y, so as to be located in the corresponding rolling region 91. After the position adjustment, the limiting mechanism 6 is locked.

[0095] Step S53, start the pressing mechanism 7 to press the band saw blade rough 9, so as to ensure that the band saw blade rough 9 does not deviate during rolling.

[0096] Step S54, the band saw blade rough 9 enters the roller of the roller mechanism 1 by the damping force applied by the pressing mechanism 7 and the supporting plate 31. Under the action of the oil cylinder 142, the first roller pressing device 11 is driven to move downward; at the same time, the second driving mechanism 15 drives the second roller pressing device 12 to rotate. At this time, under the action of the roller of the first roller 113 and the second roller 123, the hydraulic pressure of the oil cylinder 142 is transmitted to the band saw blade rough 9, so as to produce a slight deformation on the back of the band saw blade rough 9, so as to further enhance the pressure stress. That is, the roller pressure applied by the roller mechanism 1 to the band saw blade rough 9 includes the pressure stress of the relative rotation of the first roller 113 and the second roller 123 and the displacement pressure of the downward movement of the first roller 113.

[0097] Step S55, the band saw blade rough 9 after roller pressing is output from the roller mechanism 1 by the damping force applied by the pressing mechanism 7 and the supporting plate 31. The roller pressing of the band saw blade rough 9 is completed.

[0098] The band saw blade rough 9 after the final roller pressing forms three or more roller marks (as shown in Figure 9 , and the roller pressing process parameters can be flexibly customized according to the use scene of the band saw blade.

[0099] Step S56, the band saw blade rough 9 enters the polishing mechanism 8, and the bottom of the band saw blade rough 9 is polished by the grinding wheel 81, so as to polish the damage (as shown in Figure 8 ) of the band saw blade rough 9 in the production process by the polishing of the grinding wheel 81, and form a surface (as shown in Figure 9 ) so as to reduce the damage of the bottom of the saw blade and prolong the service life of the saw blade.

[0100] The S-bend of the obtained band saw blade is detected, and the S-bend is 0.02-0.05mm / 450mm.

[0101] The obtained band saw blade is subjected to high-speed sawing experiment. Specifically, the obtained band saw blade is installed on a Mosen sawing bed, and an aluminum rod with a diameter of 250mm is sawed at a linear speed of 2500-2800m / min. It is found that the band saw blade has no shaking phenomenon during sawing, the noise due to vibration during cutting is reduced from 70-80 decibels (TCB PRO AL 41*2 / 3 is used for sawing) to 40-50 decibels, and the service life of the band saw blade is 50 square meters of cutting area per meter of the band saw blade.

[0102] Example 2

[0103] Example 1 is repeated, except that the diameter of the first roller 113 in the middle position is 0.1 mm larger than the diameters of the other two first rollers 113, and the diameter of the second roller 123 in the middle position is 0.1 mm larger than the diameters of the other two second rollers 123, and the rolling pressure of the second roller 123 in the middle position on the band saw blade rough blank is 2.0 MPa.

[0104] The S-bend of the obtained band saw blade is detected, and the S-bend level is 0.01-0.05 mm / 450 mm.

[0105] The high-speed sawing experiment of the obtained band saw blade is conducted, and the result shows that the band saw blade has no shaking phenomenon during sawing, the noise due to vibration during cutting is reduced from the original 70-80 decibels to 40-50 decibels, and the service life of the band saw blade is that the average cutting area per meter of the band saw blade is 55 square meters.

[0106] Example 3

[0107] Example 1 is repeated, except that the order of the gear grinding process and the rolling process is reversed.

[0108] The S-bend of the obtained band saw blade is detected, and the S-bend level is 0.02-0.06 mm / 450 mm; the high-speed sawing experiment of the obtained band saw blade is conducted, and the result shows that the cutting is smooth, there is no obvious shaking and screaming during cutting, and the service life of the band saw blade is that the average cutting area per meter of the band saw blade is 48 square meters.

[0109] Example 4

[0110] Example 1 is repeated, except that the width of the region is 6 mm.

[0111] The S-bend of the obtained band saw blade is detected, and the S-bend level is 0.02-0.05 mm / 450 mm; the high-speed sawing experiment of the obtained band saw blade is conducted, and the result shows that the service life of the band saw blade is that the average cutting area per meter of the band saw blade is 40 square meters.

[0112] Example 5

[0113] Example 1 is repeated, except that the width of the region is 5 mm.

[0114] The S-bend of the obtained band saw blade is detected, and the S-bend level is 0.02-0.06 mm / 450 mm; the high-speed sawing experiment of the obtained band saw blade is conducted, and the result shows that the service life of the band saw blade is that the average cutting area per meter of the band saw blade is 45 square meters.

[0115] Example 6

[0116] Example 1 is repeated, except that the width of the region is 2 mm.

[0117] The S-bend of the obtained band saw blade is detected, and the S-bend level is 0.02-0.05 mm / 450 mm; the high-speed sawing experiment is conducted on the obtained band saw blade, and the result shows that the service life of the band saw blade is 35 square meters of cutting area per meter of the band saw blade on average.

[0118] Example 7

[0119] Example 1 is repeated, except that the width of the region is 1 mm.

[0120] The S-bend of the obtained band saw blade is detected, and the S-bend level is 0.03-0.06 mm / 450 mm; the high-speed sawing experiment is conducted on the obtained band saw blade, and the result shows that the service life of the band saw blade is 30 square meters of cutting area per meter of the band saw blade on average.

[0121] Example 8

[0122] Example 1 is repeated, except that the second region is not rolled.

[0123] The high-speed sawing experiment is conducted on the obtained band saw blade, and the result shows that the service life of the band saw blade is 36 square meters of cutting area per meter of the band saw blade on average.

[0124] Example 9

[0125] Example 1 is repeated, except that the third region is not rolled.

[0126] The high-speed sawing experiment is conducted on the obtained band saw blade, and the result shows that the service life of the band saw blade is 38 square meters of cutting area per meter of the band saw blade on average.

[0127] Comparative Example 1

[0128] Example 1 is repeated, except that the number of regions is 1, and the distance between the region and the tooth groove of the band saw blade rough blank is 3 mm. The S-bend of the obtained band saw blade is detected, and the S-bend level is 0.02-0.05 mm / 450 mm; the high-speed sawing experiment is conducted on the obtained band saw blade, and the result shows that the service life of the band saw blade is 33 square meters of cutting area per meter of the band saw blade on average.

[0129] Comparative Example 2

[0130] Example 1 is repeated, except that the traditional straightening rolling process is used instead of the rolling process, that is, two cylindrical rollers are used to roll the entire band saw blade rough blank.

[0131] The S-bend of the obtained band saw blade is detected, and the S-bend level is 0.02-0.305 mm / 450 mm;

[0132] The high speed sawing experiment of the obtained band saw blade shows that there is slight shaking and loud noise of 70-75 decibels during sawing, and the service life of the band saw blade is 35 square meters of sawing cutting area per meter of the band saw blade.

[0133] Comparative Example 3

[0134] Example 1 is repeated, except that the grinding process by the surface grinder is omitted.

[0135] The S-bend of the obtained band saw blade is detected, and the S-bend is 0.30-0.36 mm / 450 mm.

[0136] The high speed sawing experiment of the obtained band saw blade shows that the service life of the band saw blade is 28 square meters of sawing cutting area per meter of the band saw blade.

[0137] The content illustrated by the above examples should be understood as that the examples are only used for more clearly illustrating the present application, and are not used for limiting the scope of the present application, and after reading the present application, the modification of various equivalent forms of the present application by those skilled in the art falls into the range defined by the claims of the present application.

Claims

1. A method for manufacturing a band saw blade, characterized in that, Includes the following steps: S1. Provide raw material steel strip; S2. The two edges of the raw steel strip in the thickness direction are respectively trimmed to obtain a steel strip with two right-angled edges; S3. After leveling, straightening, and milling the steel strip in sequence, a strip with tooth supports is formed. S4. After heat treatment and roll straightening of the strip in sequence, the carbide cutting head is welded to the tooth support of the strip to obtain a band saw blade blank. S5. After sequentially performing roll forming and tooth grinding on the band saw blade blank, a finished band saw blade is obtained; or, after sequentially performing tooth grinding and roll forming on the band saw blade blank, a finished band saw blade is obtained. The rolling process includes the step of rolling at least two regions between the tooth groove and the bottom edge of the band saw blade blank; the regions extend along the length direction of the band saw blade blank, and the width of the regions is less than the distance between the tooth groove and the bottom edge of the band saw blade blank.

2. The manufacturing method according to claim 1, characterized in that, In S5, two oppositely arranged rollers are used to roll the corresponding area; during rolling, one roller can roll against one side of the band saw blade blank, and the other roller can roll against the other side of the band saw blade blank.

3. The manufacturing method according to claim 2, characterized in that, In S5, the number of regions is ≥3, and each region is distributed sequentially along the width direction of the band saw blank. Each region does not overlap or connect with the others. Several pairs of oppositely arranged rollers are used for rolling. The number of oppositely arranged roller pairs is the same as the number of regions. Each pair of oppositely arranged rollers rolls one region in each region.

4. The manufacturing method according to claim 3, characterized in that, In S5, the number of regions is 3-6.

5. The manufacturing method according to claim 4, characterized in that, In S5, the number of regions is 4-5.

6. The manufacturing method according to claim 1, characterized in that, In S5, the number of regions is ≥3, and each region is distributed sequentially along the width direction of the band saw blade blank, with each region not overlapping or adjacent to the others.

7. The manufacturing method according to claim 6, characterized in that, In S5, the number of regions is 3-6.

8. The manufacturing method according to claim 7, characterized in that, In S5, the number of regions is 4-5.

9. The manufacturing method according to claim 6, characterized in that, The various regions are parallel to each other.

10. The manufacturing method according to any one of claims 1-9, characterized in that, The distance between the area and the tooth groove of the band saw blade blank is ≥2mm; the distance between the area and the bottom edge of the band saw blade blank is ≥2mm.

11. The manufacturing method according to claim 10, characterized in that, The distance between the area and the tooth groove of the band saw blade blank is 3-6mm.

12. The manufacturing method according to claim 11, characterized in that, The distance between the area and the tooth groove of the band saw blade blank is 4-5mm.

13. The manufacturing method according to claim 10, characterized in that, The distance between the area and the bottom edge of the band saw blade blank is 3-6mm.

14. The manufacturing method according to claim 11, characterized in that, The distance between the area and the bottom edge of the band saw blade blank is 4-5mm.

15. The manufacturing method according to claim 10, characterized in that, The area includes a first area, a second area, and a third area distributed sequentially from the tooth groove to the bottom edge of the band saw blade blank. The distance between the first area and the tooth groove of the band saw blade blank is 2-5mm. The distance between the bisecting plane of the section between the tooth groove and the bottom edge of the band saw blade blank and the central axis of the second area is 2-5mm. The distance between the third area and the bottom edge of the band saw blade blank is 2-5mm.

16. The manufacturing method according to claim 15, characterized in that, The distance between the first region and the tooth groove of the band saw blade blank is 2.5-4mm; the distance between the bisecting plane of the section between the tooth groove and the bottom edge of the band saw blade blank and the central axis of the second region is 2.5-4mm; the distance between the third region and the bottom edge of the band saw blade blank is 2.5-4mm.

17. The manufacturing method according to any one of claims 3-9 and 15-16, characterized in that, Rolling is performed by a rolling mechanism, which includes a base (13), a first rolling device (11) mounted on the base (13), and a second rolling device (12). The first rolling device (11) and the second rolling device (12) are arranged opposite to each other in a first direction (Z). The first rolling device (11) is provided with at least two first rollers (113), and the second rolling device (12) is provided with at least two second rollers (123). The at least two first rollers (113) and the at least two second rollers (123) are arranged in a second direction (Y). Each first roller (113) and each second roller (123) are arranged opposite to each other and can rotate relative to each other to form at least two compressive stresses, thereby realizing the rolling of at least two regions.

18. The manufacturing method according to claim 17, characterized in that, The at least two first rollers (113) are coaxially arranged, and the at least two second rollers (123) are coaxially arranged.

19. The manufacturing method according to claim 18, characterized in that, There are 3 first rollers (113) and 3 second rollers (123); the diameter of each first roller (113) is the same and the diameter of each second roller (123) is the same, or the diameter of the first roller (113) located in the middle position is 0.05-0.15mm larger than the diameter of the other two first rollers (113), and the diameter of the second roller (123) located in the middle position is 0.05-0.15mm larger than the diameter of the other two second rollers (123).

20. The manufacturing method according to any one of claims 1-9, 15-16 and 18-19, characterized in that, The width of the area is 1.5-5mm.

21. The manufacturing method according to claim 20, characterized in that, The width of the area is 2-4mm.

22. The manufacturing method according to claim 21, characterized in that, The width of the area is 2.5-3.5mm.

23. The manufacturing method according to any one of claims 1-9, 15-16 and 18-19, characterized in that, S4. After heat treatment and roll straightening of the strip in sequence, the strip is wound into a strip roll, the back of the strip roll is ground with a surface grinder, and the carbide cutter head is welded to the tooth support of the strip to obtain a band saw blade blank.

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