A center positioning device and a method of using the same

Abstract

The invention discloses a center positioning device and a method for using the same, and relates to the technical field of saw blade processing, including a lower supporting assembly, an upper pressing assembly, an installation spindle, a sliding sleeve, an elastic member, a locking assembly and a pressing member, wherein the installation spindle is fixedly connected to the lower supporting assembly, and the installation spindle is located above the lower supporting assembly, the upper pressing assembly is slidingly sleeved on the installation spindle, the sliding sleeve is slidingly sleeved on the upper part of the upper pressing assembly, the elastic member is sleeved on the sliding sleeve, the locking assembly is installed on the sliding sleeve, and the locking assembly is located above the elastic member, the locking assembly is used to lock the elastic member on the sliding sleeve, one end of the elastic member away from the sliding sleeve contacts with the upper surface of the lower edge of the upper pressing assembly, the pressing member is installed on the installation spindle, and the pressing member is located above the sliding sleeve, the pressing member is used to adjust the position of the sliding sleeve in the vertical direction, and the saw blade is installed between the upper pressing assembly and the lower supporting assembly, the pressing friction of the saw blade is adjustable, the end face runout is small, the influence of the flatness of the substrate is small, and the requirements for the substrate are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of saw blade processing, and in particular to a center positioning device and a use method thereof. Background Art

[0002] Before sharpening the saw teeth, the saw blade needs to be clamped. When clamping the diamond circular saw blade, the substrate is generally positioned on the shaft through the center clamp. Specifically, the center clamp is locked on the shaft and located on both sides of the substrate. The center clamp radially positions the substrate, and the substrate can rotate relative to the shaft; one side of the substrate edge root contacts the static pressure foot, and the other side is pressed toward the static pressure foot by the dynamic pressure foot to achieve axial positioning, and the saw blade can be moved with the gear shifting mechanism. After the saw blade is processed, it is installed on the rotating detection instrument and tested with a micrometer. The static runout is the combined value of the runout of the substrate at the clamped part + the machining error of the machine tool. The substrate is deformed during the clamping process, and the runout is restored after it is released. At this time, the saw tooth runout is restored together with the substrate. Since the tooth root is used for positioning, the edge of the substrate is clamped, and the deformation of the substrate is large, so the end face runout will also be large. The runout is closely related to the flatness of the substrate, and the substrate has high requirements. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a center positioning device and a method for using the same, wherein the clamping friction force is adjustable, the end face runout is small, the device is less affected by the flatness of the substrate, and the requirements for the substrate are reduced.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a center positioning device, including a lower support assembly, an upper pressure assembly, an installation spindle, a sliding sleeve, an elastic member, a locking assembly and a pressing member, the installation spindle is fixedly connected to the lower support assembly, and the installation spindle is located above the lower support assembly, the upper pressure assembly is slidably sleeved on the installation spindle, the sliding sleeve is slidably sleeved on the upper part of the upper pressure assembly, the elastic member is sleeved on the sliding sleeve, the locking assembly is installed on the sliding sleeve, and the locking assembly is located above the elastic member, the locking assembly is used to lock the elastic member on the sliding sleeve, one end of the elastic member away from the sliding sleeve contacts with the upper surface of the lower edge of the upper pressure assembly, the pressing member is installed on the installation spindle, and the pressing member is located above the sliding sleeve, the pressing member is used to adjust the position of the sliding sleeve in the vertical direction, and a saw blade is installed between the upper pressure assembly and the lower support assembly.

[0006] Preferably, the lower support assembly includes a lower support plate, a flat washer and a fixing nut, the mounting core shaft includes a first shaft segment and a second shaft segment connected in sequence from top to bottom, the diameter of the first shaft segment is larger than the diameter of the second shaft segment, the second shaft segment passes through the lower support plate from top to bottom, the flat washer and the fixing nut are installed in sequence on one end of the second shaft segment located below the lower support plate, and the lower support plate is made of wear-resistant material.

[0007] Preferably, the upper pressure assembly includes an upper pressure plate and a pressure plate ring, the pressure plate ring is arranged on the lower surface of the upper pressure plate, the upper pressure plate includes a cylindrical portion and an annular portion connected in sequence from top to bottom, the cylindrical portion is slidably sleeved on the mounting core shaft, the end of the elastic member away from the sliding sleeve is in contact with the upper surface edge of the annular portion, the lower surface edge of the annular portion is provided with an annular groove, the upper surface of the pressure plate ring is provided with an annular protrusion, the annular protrusion corresponds to the position of the annular groove and the structure matches, and the pressure plate ring is made of wear-resistant material.

[0008] Preferably, it also includes a limit assembly, which includes a limit baffle and multiple screws. An annular limit groove is provided on the upper inner side of the sleeve. The limit baffle is fixed to the upper surface of the cylindrical part by multiple screws. The limit baffle cooperates with the annular limit groove to limit the sleeve axially.

[0009] Preferably, the locking assembly comprises two locking nuts, and the two locking nuts are threadedly connected to the sliding sleeve.

[0010] Preferably, the bottom end of the sliding sleeve extends outwardly along the circumferential direction to form an annular edge, and the annular edge is used to limit the elastic member.

[0011] Preferably, the elastic member is a butterfly spring.

[0012] Preferably, the clamping member is a clamping nut, the clamping nut is threadedly connected to the upper portion of the mounting spindle, and a scale is provided on the outer side wall of the clamping nut.

[0013] The present invention also provides a method for using a center positioning device, comprising the following steps:

[0014] Step 1, install the lower support assembly on the manual slide of the machine tool, fix the installation mandrel on the lower support assembly, and then select a corresponding reducer sleeve according to the different diameters of the center hole of the saw blade, install the reducer sleeve on the installation mandrel, and then install the saw blade;

[0015] Step 2, pressing the saw blade with the upper pressing assembly, and then slidingly sleeve the sheath with the elastic member installed on the upper part of the upper pressing assembly;

[0016] Step three, install the clamping piece on the installation core shaft, and make the clamping piece press the sliding sleeve, adjust the position of the clamping piece in the vertical direction according to the friction force required by the saw blade in different tooth shifting processes, after adjustment, cooperate with the tooth shifting mechanism to shift the saw blade, and then perform the sharpening process.

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

[0018] The center positioning device and the method of using the same provided by the present invention are as follows: the saw blade is installed between the upper pressure assembly and the lower support assembly; the locking assembly is used to lock the elastic member on the sliding sleeve; the end of the elastic member away from the sliding sleeve contacts the upper surface of the lower edge of the upper pressure assembly; the clamping member is installed on the mounting mandrel; the clamping member is used to adjust the position of the sliding sleeve in the vertical direction, thereby causing the elastic member to deform; different deformations of the elastic member will generate different pressures on the upper pressure assembly, and the friction forces acting on the saw blade will also be different, thereby adjusting the saw blade according to different friction requirements. Compared with the existing tooth root positioning, the present invention adopts the center positioning, that is, the middle of the substrate is clamped, the deformation of the substrate is small, the end face runout is small, and the substrate flatness has little influence, the processing accuracy is improved, and the requirements for the substrate are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A cross-sectional view of a center positioning device provided by the present invention.

[0021] Explanation of the reference numerals in the accompanying drawings: 1. saw blade; 2. mounting spindle; 3. upper pressure plate; 4. elastic member; 5. clamping member; 6. sliding sleeve; 7. limit baffle; 8. locking nut; 9. screw; 10. pressure plate inlay ring; 11. lower support plate; 12. flat washer; 13. fixing nut. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] The purpose of the present invention is to provide a center positioning device and a method for using the same, wherein the pressing friction force is adjustable, the end face runout is small, the device is less affected by the flatness of the substrate, and the requirements for the substrate are reduced.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] like Figure 1 As shown, this embodiment provides a center positioning device, including a lower supporting assembly, an upper pressing assembly, an installation spindle 2, a sleeve 6, an elastic member 4, a locking assembly and a pressing member 5. The installation spindle 2 is fixedly connected to the lower supporting assembly, and the installation spindle 2 is located above the lower supporting assembly. The upper pressing assembly is slidably sleeved on the installation spindle 2, and the sleeve 6 is slidably sleeved on the upper part of the upper pressing assembly. The sleeve 6 plays a role in positioning the upper pressing assembly relative to the center. The elastic member 4 is sleeved on the sleeve 6, and the locking assembly is installed on the sleeve 6, and the locking assembly is located above the elastic member 4. The locking assembly is used to lock the elastic member 4 on the sleeve 6. One end of the elastic member 4 away from the sleeve 6 contacts with the upper surface of the lower edge of the upper pressing assembly. The pressing member 5 is installed on the installation spindle 2, and the pressing member 5 is located above the sleeve 6. The pressing member 5 is used to adjust the position of the sleeve 6 in the vertical direction. The saw blade 1 is installed between the upper pressing assembly and the lower supporting assembly. The elastic member 4 and the pressing member 5 play the role of adjusting the friction force. The pressing member 5 deforms the elastic member 4 by adjusting the position of the sliding sleeve 6 in the vertical direction. The different deformations of the elastic member 4 generate different pressures on the upper pressing assembly, and the friction forces acting on the saw blade 1 are also different, and then the adjustment is performed according to the different friction requirements of the saw blade 1. Compared with the existing tooth root positioning, the central part positioning is adopted in this embodiment, that is, the middle part of the substrate is pressed, the deformation of the substrate is small, the end face runout is small, and the influence of the flatness of the substrate is small, the processing accuracy is improved, and the requirements for the substrate are reduced.

[0026] In the present embodiment, the center of the saw blade 1 is used to locate the teeth for indexing, and the center hole of the base plate of the saw blade 1 is pressed by the center positioning device in the present embodiment. The pressing outer diameter of the center positioning device is usually consistent with the pressing outer diameter in the use state. The saw blade 1 is indexed by the tooth-shifting mechanism. Since the diameters of the saw blades 1 are different, the pressure of the center positioning device can be adjusted according to different friction requirements. The center position of the sawtooth will have a left and right deviation with the substrate runout. In this way, the saw blade 1 is pressed to process the side edge of the saw blade 1. After completion, it is installed on the rotating detection instrument and the micrometer is used to detect the static runout, which is the comprehensive value of the runout value of the substrate at the pressed part + the machine tool processing error. Relative to the positioning of the tooth root part, the runout accuracy in this embodiment will be greatly improved. The symmetry of the sawtooth to the substrate will be affected by the basic flatness. If the substrate runout is small, the sawtooth symmetry and static runout accuracy can be guaranteed. If the substrate runout is large, the static runout accuracy can be guaranteed. The poor sawtooth symmetry mainly affects the pin removal effect. Static runout can ensure that the cutting amount of each tooth is consistent. Improving the consistency of the cutting amount of each tooth is the necessary condition to ensure the quality of the cutting surface and no edge collapse. If the substrate runout is small, the pin removal is smooth, and the service life of the saw blade 1 will be greatly improved. It should be noted that the size of the substrate runout here is distinguished on the basis of ensuring a smaller end face runout in this embodiment. It can be seen that, in the case where the substrate runout is small or large, the center positioning device in this embodiment can ensure the static runout accuracy, that is, meet the necessary conditions for cutting surface quality and no edge collapse.

[0027] The lower support assembly includes a lower support plate 11, a flat washer 12 and a fixing nut 13. The installation mandrel 2 includes a first shaft section and a second shaft section connected in sequence from top to bottom. The diameter of the first shaft section is larger than the diameter of the second shaft section. The second shaft section passes through the lower support plate 11 from top to bottom. The flat washer 12 and the fixing nut 13 are installed in sequence at one end of the second shaft section below the lower support plate 11. The second shaft section is locked by the fixing nut 13 and the flat washer 12 and the step between the first shaft section and the second shaft section is matched to realize the installation mandrel 2 being fixed on the lower support plate 11. The lower support plate 11 is made of wear-resistant material. Specifically, the lower support plate 11 is made of Cr12MoV and is specially treated with TD plating on the surface, so that the wear is very small during the tooth shifting process of the saw blade 1, and the saw blade 1 is avoided from being scratched.

[0028] The upper pressure assembly includes an upper pressure plate 3 and a pressure plate insert ring 10. The pressure plate insert ring 10 is arranged on the lower surface of the upper pressure plate 3. The upper pressure plate 3 includes a cylindrical part and an annular part connected in sequence from top to bottom. The cylindrical part is slidably sleeved on the mounting mandrel 2. The end of the elastic member 4 away from the sliding sleeve 6 is in contact with the upper surface edge of the annular part. The lower surface edge of the annular part is provided with an annular groove. The upper surface of the pressure plate insert ring 10 is provided with an annular protrusion. The annular protrusion corresponds to the position of the annular groove and the structure matches. The annular protrusion is embedded in the annular groove to realize the connection between the pressure plate insert ring 10 and the upper pressure plate 3. The pressure plate insert ring 10 is made of wear-resistant material. Specifically, the pressure plate insert ring 10 is made of Cr12MoV and is specially treated with TD plating on the surface, so that the wear is very small during the tooth shifting process of the saw blade 1, avoiding scratches on the saw blade 1.

[0029] The present embodiment also includes a limit assembly, which includes a limit baffle 7 and multiple screws 9. An annular limit groove is provided on the upper inner side of the sleeve 6. The limit baffle 7 is fixed to the upper surface of the cylindrical portion by multiple screws 9, and the limit baffle 7 is located above the bottom surface of the annular limit groove. The limit baffle 7 cooperates with the annular limit groove to limit the axial position of the sleeve 6, restricting the upward movement of the sleeve 6. At the same time, the elastic member 4, the upper pressure plate 3 and the sleeve 6 are assembled together through the limit assembly, which makes it easier to install it on the mounting core shaft 2 after assembly.

[0030] Specifically, the locking assembly includes two locking nuts 8, which are threadedly connected to the sliding sleeve 6, and the two locking nuts 8 limit the upper end of the central part of the elastic member 4. The two locking nuts 8 are stacked and used to ensure that the lower locking nut 8 will not loosen after being tightened, so that the elastic member 4 is installed more firmly.

[0031] Specifically, the bottom end of the sliding sleeve 6 extends outward in the circumferential direction to form an annular edge, which is used to limit the elastic member 4. When the elastic member 4 is sleeved on the sliding sleeve 6, the lower end of the central part of the elastic member 4 is limited by the annular edge.

[0032] In this specific embodiment, the elastic member 4 is a butterfly spring.

[0033] In this specific embodiment, the clamping member 5 is a clamping nut, which is threadedly connected to the upper part of the mounting mandrel 2, and a scale is set on the outer wall of the clamping nut. When the pressure is determined for the first time, it is determined by a torque wrench. Since there is a scale on the clamping nut, only the scale determined for the first time is remembered. When the clamping nut is rotated to this scale when it is installed again, the friction force generated when the saw blade 1 rotates will be consistent.

[0034] This embodiment also provides a method for using a center positioning device, comprising the following steps:

[0035] Step 1: Install the lower support assembly on the manual slide of the machine tool. The manual slide is used to adjust the center position of the saw blade 1. Fix the mounting mandrel 2 on the lower support assembly. Then, according to the different diameters of the center hole of the saw blade 1, select the corresponding reducer sleeve, install the reducer sleeve on the mounting mandrel 2, and then install the saw blade 1.

[0036] Step 2: Use the upper pressing assembly to press the saw blade 1, and then slide the sheath with the elastic member 4 installed on the upper part of the upper pressing assembly;

[0037] Step 3, install the clamping member 5 on the mounting mandrel 2, and make the clamping member 5 press the sliding sleeve 6, adjust the position of the clamping member 5 in the vertical direction according to the friction force required by the saw blade 1 in different tooth shifting processes, and after adjustment, move the saw blade 1 with the tooth shifting mechanism, and then perform the sharpening process. Specifically, after the first tooth of the saw blade 1 is processed, the friction force generated by the needle and the center clamping device driven by the interpolation rotation of the tooth shifting mechanism and the center positioning function moves the next tooth to the position to be processed, and then the system automatically processes the second tooth.

[0038] The present specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A center positioning device, characterized in that: The invention comprises a lower support assembly, an upper pressure assembly, an installation spindle, a sliding sleeve, an elastic member, a locking assembly and a clamping member, wherein the installation spindle is fixedly connected to the lower support assembly, and the installation spindle is located above the lower support assembly, the upper pressure assembly is slidingly sleeved on the installation spindle, the sliding sleeve is slidingly sleeved on the upper part of the upper pressure assembly, the elastic member is sleeved on the sliding sleeve, the bottom end of the sliding sleeve extends outwardly along the circumferential direction to form an annular edge, the annular edge is used for limiting the elastic member, the locking assembly is installed on the sliding sleeve, and the locking assembly is located above the elastic member, the locking assembly is used to lock the elastic member on the sliding sleeve, the end of the elastic member away from the sliding sleeve is in contact with the upper surface of the lower edge of the upper pressure assembly, and the clamping member It is installed on the installation spindle, and the clamping piece is located above the sliding sleeve, the clamping piece is used to adjust the position of the sliding sleeve in the vertical direction, and the saw blade is installed between the upper pressure assembly and the lower support assembly; the upper pressure assembly includes an upper pressure plate and a pressure plate ring, and the pressure plate ring is arranged on the lower surface of the upper pressure plate, the upper pressure plate includes a cylindrical part and an annular part connected in sequence from top to bottom, the cylindrical part is slidably sleeved on the installation spindle, the end of the elastic member away from the sliding sleeve is in contact with the upper surface edge of the annular part, the lower surface edge of the annular part is provided with an annular groove, the upper surface of the pressure plate ring is provided with an annular protrusion, the annular protrusion corresponds to the position of the annular groove and the structure matches, and the pressure plate ring is made of wear-resistant material.

2. The center positioning device according to claim 1, characterized in that: The lower supporting assembly includes a lower supporting plate, a flat washer and a fixing nut, the mounting core shaft includes a first shaft segment and a second shaft segment connected in sequence from top to bottom, the diameter of the first shaft segment is larger than the diameter of the second shaft segment, the second shaft segment passes through the lower supporting plate from top to bottom, the flat washer and the fixing nut are installed in sequence on one end of the second shaft segment located below the lower supporting plate, and the lower supporting plate is made of wear-resistant material.

3. The center positioning device according to claim 1, characterized in that: It also includes a limiting assembly, which includes a limiting baffle and multiple screws. An annular limiting groove is provided on the upper inner side of the sliding sleeve. The limiting baffle is fixed to the upper surface of the cylindrical portion by the multiple screws. The limiting baffle cooperates with the annular limiting groove to axially limit the sliding sleeve.

4. The center positioning device according to claim 1, characterized in that: The locking assembly comprises two locking nuts, and the two locking nuts are threadedly connected to the sliding sleeve.

5. The center positioning device according to claim 1, characterized in that: The elastic member is a butterfly spring.

6. The center positioning device according to claim 1, characterized in that: The clamping piece is a clamping nut, the clamping nut is threadedly connected to the upper part of the installation core shaft, and a scale is arranged on the outer side wall of the clamping nut.

7. A method for using the center positioning device according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1, install the lower support assembly on the manual slide of the machine tool, fix the installation mandrel on the lower support assembly, and then select a corresponding reducer sleeve according to the different diameters of the center hole of the saw blade, install the reducer sleeve on the installation mandrel, and then install the saw blade; Step 2, pressing the saw blade with the upper pressing assembly, and then slidingly sleeve the sliding sleeve with the elastic member installed on the upper part of the upper pressing assembly; Step three, install the clamping piece on the installation core shaft, and make the clamping piece press the sliding sleeve, adjust the position of the clamping piece in the vertical direction according to the friction force required by the saw blade in different tooth shifting processes, after adjustment, cooperate with the tooth shifting mechanism to shift the saw blade, and then perform the sharpening process.

Images