A repairing device and method for a H-shaped steel saw blade grinding wheel

Abstract

The application discloses a kind of H-shaped steel saw blade grinding wheel's repair device and repair method, belong to profile steel saw blade repair technical field.The application includes fixed frame and is set on the fixed frame and advances mechanism and repair mechanism, wherein the advancing mechanism drives repair mechanism to move axially, to adjust the repair position of the repair piece of repair mechanism to grinding wheel;The repair mechanism is used to simultaneously repair the upper and lower surfaces of grinding wheel, and the repair mechanism includes repair piece and repair rod, and the repair rod drives repair piece to reciprocate along the inclined surface of the grinding wheel to be repaired.This application can not only accurately repair the grinding wheel without changing the original inclination angle of the grinding wheel, but also adjust the position of the repair mechanism to ensure that the repair piece can accurately repair the surface to be repaired of the grinding wheel when the diameter of the grinding wheel decreases due to wear.

Description

Technical Field

[0001] This invention belongs to the field of steel saw blade repair technology, and more specifically, relates to a repair device and repair method for H-type steel saw blade grinding wheels. Background Technology

[0002] In the steel section production line, the rolling process uses saw blades (hot saws) to cut the ends of the steel sections, and the rolled steel sections are then cut to length using saw blades (cold saws). After a period of use, the saw blades gradually become dull, which reduces cutting efficiency and increases the load on the sawing machine, thus requiring the saw blades to be re-sharpened.

[0003] Current saw blade regrinding is performed on specialized saw blade regrinding machines. During this process, the abrasive grains on the grinding wheel become dull after a period of use, resulting in low grinding efficiency and high grinding force. Therefore, the saw blade regrinding process requires repairing the dulled grinding wheel. Currently, the common method for repairing saw blade grinding wheels is to manually hold a grinding wheel repair block and repair the wheel. This manual operation is not only inefficient but also poses safety hazards. Furthermore, the grinding precision is difficult to control, easily damaging the original bevel angle of the grinding wheel surface. This leads to a situation where the saw blade tooth profile (the original bevel angle of the grinding wheel surface must match the saw blade tooth profile) cannot be guaranteed during later saw blade repair. A non-standard saw blade tooth profile may affect the stress on the saw blade during production cutting, reducing its service life.

[0004] A search revealed Chinese patent application number 201610751963.4, which discloses a grinding machine with a built-in grinding wheel repair tool. This application includes a grinding machine body, a grinding wheel protective shell mounted on the grinding machine body, and a repair part for repairing the grinding wheel hinged to the grinding wheel protective shell. The repair part includes a mounting block hinged to the side wall of the grinding wheel protective shell and a repair block mounted on the mounting block. The repair block includes a repair block A for repairing the circumferential surface of the grinding wheel and a repair block B for repairing the side surface of the grinding wheel. The repair blocks are diamond pens. However, the repair tool in this application still cannot simultaneously repair both the upper and lower surfaces of the grinding wheel, nor can it guarantee the tilt angle of the grinding wheel after repair. Summary of the Invention

[0005] 1. The problem to be solved

[0006] To address at least some of the problems existing in the prior art, a repair device and method for re-grinding grinding wheels on H-type hacksaw blades are provided. The technical solution of this embodiment not only allows for precise double-sided repair of the grinding wheel without altering its original tilt angle, but also enables axial feeding of the repaired part, ensuring that even with a smaller grinding wheel diameter, the repaired part can still precisely repair the grinding wheel.

[0007] 2. Technical Solution

[0008] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0009] The present invention discloses a repair device for grinding wheels on an H-type steel saw blade, comprising a fixed frame and a propulsion mechanism and a repair mechanism disposed on the fixed frame. The propulsion mechanism drives the repair mechanism to move axially to adjust the repair position of the repair component of the repair mechanism on the grinding wheel. The repair mechanism is used to simultaneously repair the upper and lower surfaces of the grinding wheel. The repair mechanism includes a repair component and a repair rod. The repair rod drives the repair component to reciprocate along the inclined surface of the grinding wheel to be repaired.

[0010] Furthermore, the propulsion mechanism includes a propulsion rod and a second bushing and a second bearing disposed within the propulsion rod, wherein the outer ring of the second bearing is transitionally fitted with the inner cavity of the propulsion rod, and the outer ring of the second bearing is axially locked by a threaded cap to restrict its axial movement.

[0011] Furthermore, the repair rod is located inside the push rod, with one end of the repair rod located inside the second bushing and the other end connected to the lead screw, which extends into the inner ring of the second bearing; wherein, one end of the repair rod and the second bushing have a slidable intermittent fit, the other end of the repair rod and the lead screw have a threaded drive fit, and the lead screw and the inner ring of the second bearing have an interference fit.

[0012] Furthermore, the push rod is connected to a support plate, which has a guide groove.

[0013] Furthermore, a connecting rod is hinged to the end of the repair rod, and a repair component is provided at the end of the connecting rod away from the repair rod, and the repair component slides along the guide groove.

[0014] Furthermore, the guide groove and the repair component are both provided in twos, and the included angle between the two guide grooves is consistent with the included angle between the two machining surfaces of the grinding wheel, which is 60°, so as to ensure that the repair component can be repaired along the tilt angle of the grinding wheel surface, thereby not changing the original tilt of the upper and lower surfaces of the grinding wheel.

[0015] Furthermore, the fixing frame includes a fixing sleeve and a connecting plate, wherein the fixing sleeve is provided with a first bushing, and the end of the push rod of the push mechanism extends into the first bushing, forming a slidable clearance fit between the two.

[0016] Furthermore, the fixed sleeve is also provided with a first bearing and a threaded sleeve, wherein the outer ring of the first bearing is transitionally fitted with the fixed sleeve, and the inner ring is interference-fitted with the threaded sleeve; the other end of the push rod extends into the threaded sleeve for threaded transmission.

[0017] Furthermore, the threaded sleeve is connected to a first handwheel, and the lead screw of the repair mechanism is connected to a second handwheel.

[0018] Furthermore, it also includes a guide block, which has a sliding groove for the end of the support plate to be inserted.

[0019] A grinding wheel repair method of the present invention, which utilizes the above-mentioned repair device, includes the following steps:

[0020] Step 1: Install the entire repair device onto the housing of the grinding wheel machine via the connecting plate of the fixing frame. At this time, the two repair parts are located on the upper and lower sides of the grinding wheel, respectively, and are located in the corresponding guide grooves.

[0021] Step 2: Rotate the first handwheel. Since the outer ring of the first bearing and the axial direction of the threaded sleeve are fixed, the threaded sleeve and the push rod of the push mechanism are engaged by the threaded transmission, thereby driving the push mechanism to move axially. The main body of the repair mechanism is located inside the push mechanism, thereby driving the repair mechanism to move synchronously, so that the diamond pen stops at the edge of the grinding wheel.

[0022] Step 3: Rotate the second handwheel. Since the second bearing is fixed inside the push rod, and the axial position of the lead screw is fixed, the threaded part of the lead screw and the internal thread of the repair rod form a transmission thread engagement. The lead screw drives the repair rod to make a reciprocating repair movement, thereby driving the two diamond pens to move back and forth along the upper and lower surfaces of the grinding wheel. At the same time, the movement path follows the inclination angle of the grinding wheel surface itself, thus performing double-sided and precise repair of the grinding wheel.

[0023] 3. Beneficial effects

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] (1) The present invention provides a repair device for H-type steel saw blade grinding wheels. Without altering the structure of existing saw blade grinding machines, the entire repair device is mounted on the grinding wheel machine via a fixing frame, without affecting the normal grinding of the saw blade. Furthermore, the repair mechanism effectively prevents accidents caused by slippage of the grinding wheel block when the operator directly holds it for repair. The design of two diamond-tipped tools allows for simultaneous repair of both the upper and lower surfaces of the grinding wheel, significantly improving repair efficiency. Simultaneously, the guide groove's angle matches the grinding wheel's surface inclination, allowing the repaired part to be repaired along the grinding wheel's own inclined surface without altering its original angle, ensuring a good match between the repaired grinding wheel and the saw blade's tooth profile.

[0026] (2) The present invention provides a repair device for grinding wheels of H-type steel saw blades. By setting up a propulsion mechanism, the entire repair mechanism can be axially fed to ensure that even when the diameter of the grinding wheel decreases due to wear, the repair mechanism can still accurately repair the surface of the grinding wheel to be repaired. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the repair device of the invention;

[0028] Figure 2 This is a front view of the fixing frame in this invention;

[0029] Figure 3 This is a top view of the fixing frame in this invention;

[0030] Figure 4 This is a schematic diagram of the propulsion mechanism in this invention;

[0031] Figure 5 This is a schematic diagram of the repair mechanism in this invention;

[0032] Figure 6 This is a schematic diagram of the assembly of the fixing frame and the propulsion mechanism in this invention;

[0033] Figure 7 This is a schematic diagram of the assembly of the propulsion mechanism and the repair mechanism in this invention;

[0034] Figure 8 This is a front view of the casing in this invention;

[0035] Figure 9 This is a top view of the casing in this invention;

[0036] Figure 10 This is a schematic diagram of the guide block in this invention;

[0037] Figure 11 This is a schematic diagram of the assembly of the fixing frame and the cover in this invention.

[0038] In the diagram: 1. Fixing frame; 11. Fixing sleeve; 12. Connecting plate; 13. First bushing; 14. First bearing; 15. Threaded sleeve; 16. First handwheel; 17. Guide block; 18. Sliding groove;

[0039] 2. Propulsion mechanism; 21. Propulsion rod; 22. Second bushing; 23. Second bearing; 24. Support plate; 25. Guide groove;

[0040] 3. Repair mechanism; 31. Repair component; 32. Repair rod; 33. Lead screw; 34. Connecting rod; 35. Second handwheel;

[0041] 4. Cover; 41. Upper cover plate; 42. Lower cover plate; 43. Middle cover plate; 44. First mounting hole; 45. Second mounting hole; 46. Mounting groove. Detailed Implementation

[0042] The present invention will be further described below with reference to specific embodiments.

[0043] Example 1

[0044] like Figure 1 As shown in this embodiment, a repair device for grinding wheels on an H-type hacksaw blade includes a fixed frame 1, a pushing mechanism 2, and a repair mechanism 3. The fixed frame 1 is mounted on the casing 4 of the grinding wheel machine and supports the pushing mechanism 2 and the repair mechanism 3. The pushing mechanism 2 can drive the repair mechanism 3 to move axially, ensuring that as the diameter of the worn grinding wheel decreases, the repair mechanism 3 can be pushed inward, always maintaining a certain amount of repair on the grinding wheel, thus continuously repairing it. The repair mechanism 3 is located inside the pushing mechanism 2 and moves with it. The repair mechanism 3 is used to repair both sides of the grinding wheel simultaneously, maintaining the original included angle between the upper and lower surfaces of the grinding wheel.

[0045] Specifically, refer to Figure 8 As shown, the housing 4 of the grinding wheel machine consists of an upper cover plate 41, a lower cover plate 42, and an arc-shaped middle cover plate 43, forming a semi-enclosed shell. The housing 4 is designed to prevent the grinding wheel from breaking abnormally during the grinding process and causing injury to personnel, while also providing an installation base for the entire repair device.

[0046] An auxiliary plate for securing bolts is welded onto the upper cover plate 41. A first mounting hole 44 is drilled on this auxiliary plate, which mates with a second mounting hole 45 on the cover 4. The entire cover 4 is then secured to the machine tool body by bolts. The intermediate cover plate 43 has a mounting groove 46, and mounting holes for mounting brackets are machined near the groove opening for mounting brackets 1.

[0047] like Figure 9 , Figure 10 As shown, the upper and lower cover plates, in addition to their protective function, are also machined with two rows of threaded holes for mounting guide blocks 17, and the guide blocks 17 are provided with sliding grooves 18. The sliding grooves 18 are used to guide the movement of the support plate 24 (described in detail below). Similarly, the guide blocks 17 are provided with mounting holes.

[0048] refer to Figure 2 , Figure 3As shown, the fixing frame 1 includes a fixing sleeve 11 and a connecting plate 12. The connecting plate 12 is an arc-shaped plate that matches the curvature of the intermediate cover plate 43. The arc-shaped connecting plate 12 has threaded holes that mate with mounting holes on the intermediate cover plate 43, and the two can be connected by bolts. The connecting plate 12 and the fixing sleeve 11 can be welded together.

[0049] The fixed sleeve 11 contains a first bushing 13, a first bearing 14, a threaded sleeve 15, and a first handwheel 16. The outer ring of the first bearing 14 forms a transition fit with the fixed sleeve 11, and is also locked in place by a cap to restrict axial movement of the first bearing 14. The threaded sleeve 15 is installed on the inner ring of the first bearing 14, forming an interference fit between them.

[0050] The first handwheel 16 engages with the external thread of one end of the threaded sleeve 15 via its internal thread, essentially acting as a threaded cap to screw and tighten one end of the threaded sleeve 15. This compresses the inner ring of the first bearing 14, the threaded sleeve 15, and the first handwheel 16 into a single, interconnected unit. Rotating the first handwheel 16, with the outer ring of the first bearing 14 axially fixed and supported by the inner ring, causes the threaded sleeve 15 to rotate in a circular motion.

[0051] like Figure 4 , Figure 6 As shown, the propulsion mechanism 2 includes a propulsion rod 21, a second bushing 22, a second bearing 23, and a support plate 24. One end of the propulsion rod 21 extends into the first bushing 13 of the fixed frame 1, forming a slidable clearance fit between them. The first bushing 13 provides radial support for the entire propulsion mechanism 2, while also allowing for axial relative sliding, thus not affecting the axial movement of the propulsion rod 21 during the feeding process.

[0052] The other end of the push rod 21 extends into the threaded sleeve 15, and the external thread on the push rod 21 engages with the internal thread of the threaded sleeve 15. Since the axial position of the threaded sleeve 15 is fixed, rotating the first handwheel 16 pushes the push rod 21 to move axially through the threaded sleeve 15, thereby driving the entire push mechanism 2 to move.

[0053] The second bushing 22 and the second bearing 23 are both installed inside the push rod 21. The outer ring of the second bearing 23 forms a transition fit with the inner cavity of the push rod 21, and the outer ring of the second bearing 23 is axially locked and fixed by a cap to restrict its axial movement.

[0054] The support plate 24 is mounted on the push rod 21, preferably welded to the front end of the push rod 21. Simultaneously, the end of the support plate 24 engages in the sliding groove 18 of the corresponding guide block 17 to ensure the stability of the support plate 24's movement. Two guide grooves 25 are machined on the support plate 24, providing support and guidance for the movement of the repair piece 31. Furthermore, the two guide grooves 25 have a certain included angle, which coincides with the included angle between the two machined surfaces of the grinding wheel. That is, the upper guide groove 25 is oriented in the same direction as the inclination angle of the upper surface of the grinding wheel, and the lower guide groove 25 is oriented in the same direction as the inclination angle of the lower surface of the grinding wheel. This ensures that when the repair piece 31 slides within the guide grooves 25, it can be repaired along the inclination angle of the grinding wheel surface itself, thereby ensuring the accuracy of the repair. Specifically, in this embodiment, the included angle between the upper and lower surfaces of the grinding wheel is 60°.

[0055] like Figure 5 , Figure 7 As shown, the repair mechanism 3 includes a repair component 31, a repair rod 32, a lead screw 33, a connecting rod 34, and a second handwheel 35. One end of the repair rod 32 extends into the second bushing 22 of the propulsion mechanism 2, forming a slidable clearance fit. The second bushing 22 provides radial support for the entire repair mechanism 3, while also allowing for axial relative movement, thus not affecting the reciprocating movement of the repair rod 32 during the repair process.

[0056] One end of the lead screw 33 extends into the repair rod 32, and the two are connected by a threaded drive. The lead screw 33 also forms an interference fit with the inner ring of the second bearing 23. At the same time, the lead screw 33 and the second bearing 23 are locked by a threaded cap on the lead screw 33, so that the inner ring of the second bearing 23 and the lead screw 33 form a linked whole.

[0057] Additionally, a second handwheel 35 is connected to the end of the lead screw 33. Since the second bearing 23 is fixed inside the push rod 21, the axial position of the lead screw 33 is also fixed. Rotating the second handwheel 35 on the lead screw 33 causes the threaded portion of the lead screw 33 to engage with the internal thread of the repair rod 32, thus driving the repair rod 32 in a reciprocating repair motion to complete the repair work on the grinding wheel.

[0058] One end of the connecting rod 34 is connected to the repair rod 32 via a pin, and the other end is connected to a repair component 31, which is preferably a diamond pen. Specifically, in this embodiment, two connecting rods 34 are provided, and the two repair components 31 are located on the upper and lower sides of the grinding wheel respectively, sliding back and forth along their respective guide grooves 25 to achieve the goal of double-sided, one-time repair of the grinding wheel. Simultaneously, since the opening angle of the guide grooves 25 is consistent with the tilt angle of the grinding wheel surface, the accuracy of the repair is ensured.

[0059] The repair method of the repair device for the grinding wheel of an H-type hacksaw blade according to this embodiment mainly includes the following steps:

[0060] Step 1: Installation

[0061] First, the guide block 17 is installed on the upper and lower covers, and then the entire repair device is installed on the housing 4 of the grinding wheel through the connecting plate 12 of the fixing frame 1. At this time, the ends of the support plate 24 are respectively located in the sliding grooves 18 on the corresponding guide block 17, which can play a certain guiding role in the movement of the support plate 24; at the same time, the two repair parts 31 are respectively located on the upper and lower sides of the grinding wheel and are located in the corresponding guide grooves 25.

[0062] Step 2: Adjust the repair position

[0063] Rotating the first handwheel 16 fixes the outer ring of the first bearing 14 and the axial direction of the threaded sleeve 15. The threaded sleeve 15 engages with the threaded drive of the push rod 21 of the push mechanism 2, thereby driving the push mechanism 2 to move axially. The main body of the repair mechanism 3 is located inside the push mechanism 2, thus driving the repair mechanism 3 to move synchronously, causing the diamond pen to stop at the edge of the grinding wheel.

[0064] Step 3: Repair

[0065] Rotating the second handwheel 35 causes the second bearing 23 to be fixed inside the push rod 21. Simultaneously, the axial position of the lead screw 33 is fixed, and the threaded portion of the lead screw 33 forms a transmission thread engagement with the internal thread of the repair rod 32. The lead screw 33 drives the repair rod 32 to perform a reciprocating repair motion, thereby driving the two diamond pens to move back and forth along the upper and lower surfaces of the grinding wheel. At the same time, the movement path follows the inclination angle of the grinding wheel surface itself, thus performing double-sided and precise repair of the grinding wheel.

[0066] This invention discloses a repair device and method for H-type steel saw blade grinding wheels. Without altering the structure of existing saw blade grinding machines, the entire repair device is mounted on the grinding machine via a fixing frame 1, without affecting the normal grinding operation of the saw blade. The repair mechanism 3 effectively prevents accidents caused by slippage of the grinding wheel block when the operator directly holds it for grinding. Furthermore, the design of two diamond pens allows for simultaneous repair of both the upper and lower surfaces of the grinding wheel. The movement path of the diamond pens aligns with the inclination of the grinding wheel surface, ensuring repair accuracy. Additionally, the feeding mechanism 2 allows for a certain amount of feed to the repair mechanism 3, ensuring that even when the diameter of the grinding wheel decreases due to wear, the repair mechanism 3 can still perform repairs.

[0067] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A repair device for sharpening grinding wheels on H-type steel saw blades, characterized in that: It includes a fixed frame (1) and a propulsion mechanism (2) and a repair mechanism (3) mounted on the fixed frame (1). The propulsion mechanism (2) drives the repair mechanism (3) to move axially. The repair mechanism (3) is used to repair the upper and lower surfaces of the grinding wheel at the same time. The repair mechanism (3) includes a repair component (31) and a repair rod (32). The repair rod (32) drives the repair component (31) to reciprocate along the inclined surface of the grinding wheel to be repaired. The propulsion mechanism (2) includes a propulsion rod (21) and a second bushing (22) and a second bearing (23) disposed in the propulsion rod (21), wherein the outer ring of the second bearing (23) is transitionally fitted with the inner cavity of the propulsion rod (21), and the outer ring of the second bearing (23) is axially locked. The repair rod (32) is located inside the push rod (21). One end of the repair rod (32) is located inside the second bushing (22), and the other end is connected to the lead screw (33), which extends into the inner ring of the second bearing (23). The push rod (21) is connected to a support plate (24), and a guide groove (25) is provided on the support plate (24); The end of the repair rod (32) is hinged to a connecting rod (34), and the end of the connecting rod (34) away from the repair rod (32) is provided with a repair component (31), and the repair component (31) slides along the guide groove (25); The fixing frame (1) includes a fixing sleeve (11) and a connecting plate (12), wherein the fixing sleeve (11) is provided with a first bushing (13), and the end of the push rod (21) extends into the first bushing (13); The fixed sleeve (11) is also provided with a first bearing (14) and a threaded sleeve (15), wherein the outer ring of the first bearing (14) is transitionally fitted with the fixed sleeve (11), and the inner ring is interference-fitted with the threaded sleeve (15); the other end of the push rod (21) extends into the threaded sleeve (15) for threaded transmission; the connecting plate (12) is used to connect with the cover (4) of the grinding wheel, the cover (4) is connected with a guide block (17), and the guide block (17) is provided with a sliding groove (18) for the end of the support plate (24) to be inserted. The threaded sleeve (15) is connected to a first handwheel (16), and the screw (33) of the repair mechanism (3) is connected to a second handwheel (35).

2. The repair device for H-type steel saw blade grinding wheel according to claim 1, characterized in that: The guide groove (25) and the repair piece (31) are both provided in twos, and the included angle between the two guide grooves (25) is 60°.

3. A method for repairing saw blade grinding wheels using the repair device described in claim 2, characterized in that, Includes the following steps: Step 1: Install the entire repair device on the casing (4) of the grinding wheel machine through the connecting plate (12) of the fixing frame (1). At this time, the two repair parts (31) are located on the upper and lower sides of the grinding wheel respectively, and are located in the corresponding guide groove (25). Step 2: Rotate the first handwheel (16). Since the outer ring of the first bearing (14) and the axial direction of the threaded sleeve (15) are fixed, the threaded sleeve (15) and the push rod (21) of the push mechanism (2) are threadedly driven together, thereby driving the push mechanism (2) to move axially. The main body of the repair mechanism (3) is set inside the push mechanism (2), thereby driving the repair mechanism (3) to move synchronously, so that the diamond pen stops at the edge of the grinding wheel. Step 3: Rotate the second handwheel (35). Since the second bearing (23) is fixed inside the push rod (21), and the axial position of the lead screw (33) is fixed, the threaded part of the lead screw (33) and the internal thread of the repair rod (32) form a transmission thread engagement. The lead screw (33) drives the repair rod (32) to make a back-and-forth repair movement, thereby driving the two diamond pens to move back and forth along the upper and lower surfaces of the grinding wheel. At the same time, the movement path is along the inclination angle of the grinding wheel surface itself, so as to carry out double-sided and precise repair of the grinding wheel.

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