A kind of easy-to-replace self-tightening structure for the main roller shaft of multi-wire cutting machine and implementation method

Abstract

The present application relates to the technical field of multi-wire saw, in particular to a self-tightening structure for the main roller shaft of a multi-wire saw and a method for implementing the same, which comprises a roller shaft body symmetrically arranged at both ends and a pair of connecting shafts arranged at both ends of the roller shaft body and used for being installed in a bearing box, a detachable threaded shaft connecting structure is arranged between the end of the roller shaft body and the connecting shaft and locked by an internal threaded sleeve, and a central screw is axially arranged on the connecting shaft and screwed with the roller shaft body. The self-tightening structure realizes mutual locking between the threaded connections when the main roller shaft frequently switches the rotating direction, effectively avoids the precision loss and rapid wear caused by the frequent disassembly and assembly of the bearing box, and guarantees the service life of the bearing box of the main roller shaft of the multi-wire saw. The self-tightening structure reduces the difficulty of disassembling and replacing the main roller shaft body and improves the work efficiency.

Description

Technical Field

[0001] This invention relates to the field of multi-wire cutting machine technology and equipment, specifically to an easily replaceable self-tightening structure and implementation method for the main roller shaft of a multi-wire cutting machine. Background Technology

[0002] Multi-wire cutting is a high-efficiency, low-material-loss processing method suitable for processing hard and brittle materials, such as stone and silicon wafers, into sheet materials to improve material utilization. This technology requires winding diamond wire coated with fine abrasive particles onto a main roller shaft, forming multiple diamond wires cutting the material simultaneously, resulting in high processing efficiency. During processing, the diamond wire relies on the friction between itself and the main roller shaft to generate cutting tension. Furthermore, due to the non-perfect parallelism between the diamond wire path and the grooves on the main roller shaft during winding, the diamond wires also cause rapid wear on the grooves of the main roller shaft during material cutting. To ensure cutting quality, frequent disassembly of the bearing housing to replace the main roller shaft is unavoidable.

[0003] During operation of a multi-wire cutting machine, the main roller shaft needs to rotate at high speed to drive the diamond wires to grind the material at high speed. In this process, the main roller shaft needs to provide sufficient cutting force to the multiple diamond wires through friction. When there are many diamond wires, the working load on the main roller bearing will be very large. Therefore, the main roller shaft usually faces high-speed, heavy-load conditions. Frequent replacement of the main roller shaft can easily lead to misalignment of the bearing housing, causing rapid failure of the bearing system under high-speed, heavy-load conditions. Therefore, it is necessary to design an easily replaceable structure for the main roller shaft. Summary of the Invention

[0004] The purpose of this invention is to provide an easy-to-replace self-tightening structure and implementation method for the main roller shaft of a multi-wire cutting machine. This easy-to-replace self-tightening structure helps to replace the main roller shaft winding body without disassembling the bearing housing, thus reducing the difficulty of replacing the main roller shaft body.

[0005] The technical solution of the present invention is as follows: an easy-to-replace self-tightening structure for the main roller shaft of a multi-wire cutting machine, comprising a roller shaft body symmetrical at both ends and a pair of connecting shafts disposed at both ends of the roller shaft body and for installation in a bearing housing. The ends of the roller shaft body and the connecting shafts are provided with a detachable threaded shaft connection structure that is engaged and locked by an internal threaded bushing. A central screw rod that is screwed to the roller shaft body is also axially passed through the connecting shaft.

[0006] Furthermore, the detachable threaded shaft connection structure includes a first threaded shaft disposed on the end face of the roller body and protruding outward, the end face of the first threaded shaft being provided with a square protrusion, and a pair of first square grooves being provided on the circumferential surface of the first threaded shaft; a second threaded shaft is disposed on the connecting shaft, the second threaded shaft being provided with a square groove that engages with the square protrusion, and a pair of second square grooves being provided on the circumferential surface of the second threaded shaft, the first square groove and the second square groove mating together to form a complete keyway for installing a rectangular key.

[0007] Furthermore, both the first square groove and the second square groove are provided with a keyway threaded hole, and the rectangular key is provided with a pair of countersunk holes for threading bolts through and connecting with the keyway threaded hole.

[0008] Furthermore, the square protrusion has a dovetail structure, and the square slot has a dovetail groove that does not radially penetrate the second threaded shaft.

[0009] Furthermore, one end of the internal threaded bushing is provided with a bushing journal, and an annular groove for avoiding the bushing journal is provided on the end face of the roller body and at the root of the first threaded shaft; the inner wall of the other end of the internal threaded bushing is provided with a third shaped groove, and multiple through holes are evenly distributed along the circumferential direction on the internal threaded bushing.

[0010] Furthermore, the connecting shaft is provided with a central hole for the central screw to pass through, and the roller body is provided with a roller thread hole through which a square protruding end face passes, and the central screw passes through the central hole and is screwed into the roller thread hole.

[0011] Furthermore, the central screw is provided with a tapered neck, and the central hole is provided with a tapered neck that mates with the tapered neck.

[0012] Furthermore, the first threaded shaft and the second threaded shaft have the same helical direction, while the central screw has the opposite helical direction to the first threaded shaft.

[0013] Furthermore, each of the connecting shafts is provided with a bearing journal, and at least one self-aligning roller bearing is interference-fitted onto the bearing journal.

[0014] An implementation method for an easily replaceable self-tightening structure for the main roller shaft of a multi-wire cutting machine includes the following steps:

[0015] Step 1: Screw the journal of the internal threaded bushing into the annular groove of the roller body;

[0016] Step 2: Slide the square protrusions at both ends of the roller body into the square slots of the connecting shaft;

[0017] Step 3: Rotate the internal threaded bushing to install the rectangular key into the complete keyway formed by the first square groove and the second square groove through the third square groove;

[0018] Step 4: Install one bolt into the keyway threaded hole of the first square groove through the countersunk hole; rotate the internal threaded bushing and install the other bolt into the keyway threaded hole of the second square groove in sequence through the through hole and the countersunk hole.

[0019] Step 5: Tighten the internal threaded bushing toward the connecting shaft; screw the center screw into the roller body and tighten it;

[0020] Reverse steps 1-5 to separate the roller body from the connecting shaft.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] 1. The easy-to-replace self-tightening structure for the main roller shaft of a multi-wire cutting machine helps to avoid frequent disassembly and assembly of the bearing housing during the replacement of the main roller shaft body. This ensures that the bearing system remains in a stable installation state to adapt to long-term high-speed and heavy-load conditions, thereby effectively preventing problems such as loss of precision and rapid wear of the main roller shaft bearing system due to frequent disassembly and assembly, and ensuring the service life of the main roller shaft bearing housing of the multi-wire cutting machine.

[0023] 2. The easy-to-replace self-tightening structure for the main roller shaft of a multi-wire cutting machine helps to simplify the disassembly and replacement process of the main roller shaft body, avoid cumbersome disassembly and assembly processes, reduce maintenance costs, and improve production efficiency.

[0024] 3. The easy-to-replace self-tightening structure for the main roller shaft of the multi-wire cutting machine helps to reduce the technical requirements for disassembling and replacing the main roller shaft body and reduce the difficulty of disassembly and replacement.

[0025] 4. The easy-to-replace self-tightening structure for the main roller shaft of a multi-wire cutting machine, through the design of the opposite thread structure of the central screw and the internal threaded bushing, can ensure that the two thread structures are locked together when the main roller shaft frequently changes the rotation direction, effectively preventing the shaft connection from loosening. Attached Figure Description

[0026] Figure 1 This is an assembly drawing of the easily replaceable self-tightening structure for the main roller shaft of a multi-wire cutting machine in this invention;

[0027] Figure 2 This is an exploded view of the present invention;

[0028] Figure 3 This is a schematic diagram of the connecting shaft structure of the present invention;

[0029] Figure 4 This is a cross-sectional view of the connecting shaft of the present invention;

[0030] Figure 5 This is a schematic diagram of the structure of the roller body of the present invention;

[0031] Figure 6 This is a flowchart illustrating the assembly (disassembly) process of the present invention;

[0032] In the diagram: 1-Connecting shaft; 11-Central hole; 12-Bearing journal; 13-Second threaded shaft; 14-Second square groove; 15-Square groove; 16-Keyway threaded hole; 17-Tapered neck; 2-Bearing; 3-Threaded bushing; 31-Internal thread structure; 32-Third square groove; 33-Through hole; 34-Sleeve journal; 4-Roller body; 41-Roller threaded hole; 42-Square protrusion; 43-First threaded shaft; 44-First square groove; 45-Annular groove; 46-Keyway threaded hole; 5-Central screw; 51-Tapered neck; 52-Screw section; 6-Rectangular key; 61-Counterhole. Detailed Implementation

[0033] To make the above features and advantages of the present invention more readily understood, specific embodiments are described below in conjunction with the accompanying drawings, but the present invention is not limited thereto.

[0034] refer to Figures 1 to 6

[0035] An easily replaceable self-tightening structure for the main roller shaft of a multi-wire cutting machine includes a roller shaft body 4 symmetrically arranged at both ends and a pair of connecting shafts 1 disposed at both ends of the roller shaft body and used for installation in bearing housings, thereby dividing the conventional main roller shaft into three sections. Each end of the roller shaft body and the connecting shaft is provided with a detachable threaded shaft connection structure that engages with each other and is locked by an internally threaded bushing 3. A central screw 5, which is screwed onto the connecting shaft and connected to the roller shaft body, is also axially inserted into the connecting shaft.

[0036] In this embodiment, to achieve detachable connection between the connecting shaft and the roller body, the detachable threaded shaft connection structure includes an M250 first threaded shaft 43 disposed on the end face of the roller body, protruding outward and rotating right-handed. The end face of the first threaded shaft has a square protrusion 42, and the circumferential surface of the first threaded shaft has a pair of first square grooves 44 with dimensions of 60 mm × 40 mm × 33 mm (length × width × height). The end of the connecting shaft that mates with the roller body has an M250 second threaded shaft 13. The second threaded shaft has a square groove 15 that engages with the square protrusion, and the circumferential surface of the second threaded shaft has a pair of second square grooves 14 with dimensions of 70 mm × 40 mm × 33 mm (length × width × height). When the connecting shaft is connected to the roller body, the first square groove and the second square groove mate to form a complete keyway. The dimensions of this complete keyway are 130 mm × 40 mm × 33 mm (length × width × height), used for mounting rollers with dimensions of 130 mm × 40 mm × 33 mm. 6. A rectangular key measuring 28 mm x 28 mm.

[0037] In this embodiment, in order to lock the rectangular key and the keyway, the bottom of the first square slot is provided with an M10 keyway threaded hole 16, and the bottom of the second square slot is provided with an M10 keyway threaded hole 46. The rectangular key is provided with a pair of countersunk holes 61 for threading bolts through and connecting with the keyway threaded holes. The main hole diameter is 11mm, so that the M10 bolt can be installed into the keyway threaded hole 16 through one of the countersunk holes, and the M10 bolt can also be installed into the keyway threaded hole 46 through the other countersunk hole, so that the rectangular key is simultaneously fixed to the connecting shaft and the roller shaft body.

[0038] In this embodiment, for better engagement, the square protrusion is a dovetail structure and its length is less than the diameter of the first threaded shaft; the square slot is a dovetail slot and does not radially penetrate the second threaded shaft.

[0039] In this embodiment, the center of the internally threaded bushing has an M250 right-hand internal thread structure 31 for mating with the threaded shaft formed by the roller body and the connecting shaft. One end of the internally threaded bushing that mates with the roller body has a bushing journal 34. An annular groove 45 for avoiding the bushing journal is provided on the end face of the roller body at the root of the first threaded shaft. In use, the internally threaded bushing is pre-screwed into the annular groove of the roller body. The inner wall of the other end of the internally threaded bushing has a third triangular groove 32 with dimensions of 50 mm × 40 mm × 30 mm (length × width × height) to assist in the installation of the rectangular key 6. Four through holes 33 are evenly distributed along the circumference of the internally threaded bushing, allowing for tightening or loosening of the bushing.

[0040] In this embodiment, the connecting shaft is provided with a central hole 11 with a diameter of 62mm for the central screw to pass through, and the roller shaft body is provided with a left-handed M60 roller shaft threaded hole 41 through which a square protruding end face passes. The diameter of the central screw is 60mm, and the screw part 52 of the central screw is a left-handed M60, which passes through the central hole and is screwed into the roller shaft threaded hole.

[0041] In this embodiment, the central screw is provided with a 30° tapered neck 51, and the central hole is provided with a 30° tapered neck 17 that mates with the tapered neck.

[0042] In this embodiment, the first threaded shaft, the second threaded shaft, and the internal threaded bushing have the same helical direction, and the roller shaft threaded hole and the central screw have the same helical direction, with the helical direction of the roller shaft threaded hole and the central screw being opposite to that of the first threaded shaft. The reverse tightening between the internal threaded bushing and the central screw constitutes a self-tightening function design for an easily replaceable self-tightening structure.

[0043] In this embodiment, each connecting shaft is provided with a bearing journal 12 with a diameter of 260mm, and at least one self-aligning roller bearing 2 with an inner diameter of 260mm is interference-fitted on the bearing journal to adjust the rotation axis of the main roller shaft after assembly.

[0044] A method for implementing an easily replaceable self-tightening structure for the main roller shaft of a multi-wire cutting machine includes the following steps:

[0045] Step 1: Screw the journal 34 of the internal thread bushing 3 into the annular groove 45 of the roller body 4;

[0046] Step 2: Slide the square protrusions 42 at both ends of the roller body 4 into the square slots 15 of the connecting shaft 1;

[0047] Step 3: Rotate the internal threaded bushing 3 to align the third square groove 32 with the second square groove 14, and then install the rectangular key 6 into the complete keyway formed by the first square groove 44 and the second square groove 14 through the third square groove 32;

[0048] Step 4: Install the M10 bolt into the keyway threaded hole 16 of the first square groove through the countersunk hole 61; rotate the internal threaded bushing 3 counterclockwise, and install the other M10 bolt into the keyway threaded hole 46 of the second square groove through the through hole 33 and the countersunk hole 61 in sequence.

[0049] Step 5: Rotate the internal threaded bushing 3 counterclockwise toward the shoulder of the connecting shaft 1 and tighten it; screw the center screw 5 clockwise into the roller threaded hole 41 of the roller body 4 and tighten it.

[0050] By reversing steps 1-5 above, the roller body can be separated from the connecting shaft.

[0051] The above description is only a preferred embodiment of the present invention. For those skilled in the art, designing different forms of easily replaceable self-tightening structures and methods for the main roller of a multi-wire cutting machine based on the teachings of the present invention does not require creative labor. All equivalent changes, modifications, substitutions and variations made in accordance with the scope of the patent application of the present invention without departing from the principles and spirit of the present invention shall be covered by the present invention.

Claims

1. A method for implementing an easily replaceable self-tightening structure for the main roller shaft of a multi-wire cutting machine, wherein the easily replaceable self-tightening structure for the main roller shaft of a multi-wire cutting machine includes a roller shaft body symmetrically arranged at both ends and a pair of connecting shafts disposed at both ends of the roller shaft body and used for mounting in a bearing housing, characterized in that, The roller body and the connecting shaft are both provided with a detachable threaded shaft connection structure that engages with each other and is locked by an internal threaded bushing. A central screw threaded to the roller body is also axially threaded through the connecting shaft. The detachable threaded shaft connection structure includes a first threaded shaft disposed on the end face of the roller body and protruding outwards. The end face of the first threaded shaft has a square protrusion, and a pair of first square grooves are provided on the circumferential surface of the first threaded shaft. A second threaded shaft is provided on the connecting shaft. The second threaded shaft has a square groove that engages with the square protrusion, and a pair of second square grooves are provided on the circumferential surface of the second threaded shaft. The rectangular grooves are formed by the mating of the first and second square grooves to create a complete keyway for installing a rectangular key. Each of the first and second square grooves has a keyway threaded hole. The rectangular key has a pair of countersunk holes for bolts to thread into the keyway threaded holes. One end of the internally threaded bushing has a bushing journal. The end face of the roller body, located at the root of the first threaded shaft, has an annular groove to avoid the bushing journal. The other end of the internally threaded bushing has a third rectangular groove on its inner wall. Multiple through holes are evenly distributed along the circumference of the internally threaded bushing. The implementation steps are as follows: Step 1: Screw the journal of the internal threaded bushing into the annular groove of the roller body; Step 2: Slide the square protrusions at both ends of the roller body into the square slots of the connecting shaft; Step 3: Rotate the internal threaded bushing to install the rectangular key into the complete keyway formed by the first square groove and the second square groove through the third square groove; Step 4: Install one bolt into the keyway threaded hole of the first square groove through the countersunk hole; rotate the internal threaded bushing and install the other bolt into the keyway threaded hole of the second square groove in sequence through the through hole and the countersunk hole. Step 5: Tighten the internal threaded bushing toward the connecting shaft; screw the center screw into the roller body and tighten it; Reverse steps 1-5 to separate the roller body from the connecting shaft.

2. The method for implementing the easily replaceable self-tightening structure for the main roller shaft of a multi-wire cutting machine according to claim 1, characterized in that, The square protrusion has a dovetail structure, and the square slot has a dovetail groove that does not radially penetrate the second threaded shaft.

3. The method for implementing the easily replaceable self-tightening structure for the main roller shaft of a multi-wire cutting machine according to claim 1, characterized in that, The connecting shaft is provided with a central hole for the central screw to pass through, and the roller body is provided with a roller thread hole through which a square protruding end face passes. The central screw passes through the central hole and is screwed into the roller thread hole.

4. The method for implementing the easily replaceable self-tightening structure for the main roller shaft of a multi-wire cutting machine according to claim 3, characterized in that, The central screw is provided with a tapered neck, and the central hole is provided with a tapered neck that mates with the tapered neck.

5. A method for implementing an easily replaceable self-tightening structure for the main roller shaft of a multi-wire cutting machine according to claim 1 or 4, characterized in that, The first threaded shaft and the second threaded shaft have the same helical direction, while the helical direction of the central screw is opposite to that of the first threaded shaft.

6. A method for implementing an easily replaceable self-tightening structure for the main roller shaft of a multi-wire cutting machine according to claim 1 or 4, characterized in that, Each connecting shaft is provided with a bearing journal, and at least one self-aligning roller bearing is interference-fitted onto the bearing journal.

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