Take-up and pay-off mechanism for cutting machine

Abstract

A take-up and pay-off mechanism for a cutting machine comprises a wire wheel, a wire wheel base and a bearing box used for installing the wire wheel base, the wire wheel is arranged on the periphery of a central spindle on the wire wheel base in a sleeving mode, the conical surface of one end of the wire wheel is connected with the conical surface of the bottom of the wire wheel base in a close-fitting mode, a positioning sleeve is fixedly arranged on the central spindle in a sleeving mode, and the outer diameter of the positioning sleeve can be attached to the inner diameter of the wire wheel; a guide sleeve is arranged on the peripheral wall of the flange of the line wheel base in the axial direction in a sliding mode, the end, facing the positioning sleeve, of the guide sleeve is a horn opening end, and the horn opening end is used for bearing and abutting against the conical face of one end of the line wheel and is in close fit connection with the conical face of the line wheel base after the line wheel penetrates through the positioning sleeve. According to the utility model, the condition of swinging during take-up and pay-off by height rotation of the wire wheel can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of semiconductor material multi-wire cutting machine technology and equipment, specifically a wire take-up and release mechanism for a cutting machine. Background Technology

[0002] In the field of semiconductor material multi-wire dicing machines, wire reels are used to wind and collect the dicing wire, such as diamond wire, used in the process of dicing silicon wafers. The wire reel needs to be mounted on a wire reel base and rotated to take in and release the wire. It is positioned by tightly fitting the conical surface of one end of the wire reel with the conical surface of the wire reel base. Then, the mandrel on the wire reel base is fixed by the wire reel cover and the clamping screw, thus installing the wire reel on the wire reel base.

[0003] However, if the machining accuracy of the conical surface of the spool and the conical surface of the spool base is not high, or if the conical surface of the spool is damaged during transportation, the conical surface of the spool will not fit snugly with the conical surface of the spool base, resulting in misalignment between the spool and the spool base. Even if the spool is installed on the spool base, the concentricity between the spool and the spool base will decrease, causing swaying when the spool rotates at high speed. If the spool sways, it will lead to frequent wire breakage and snapping during wire cutting. Therefore, in order to reduce abnormal equipment shutdowns such as wire breakage and snapping, the applicant has designed a take-up and unwinding mechanism that can reduce spool swaying. Utility Model Content

[0004] The present invention aims to provide a wire take-up and unwinding mechanism for a cutting machine, which can reduce the swaying that occurs when the wire reel rotates at a high speed during take-up and unwinding.

[0005] To solve the above technical problems, the specific solution adopted by this utility model is a wire take-up and unwinding mechanism for a cutting machine, including a wire spool, a wire spool base, and a bearing housing for mounting the wire spool base. The wire spool is sleeved on the outer circumference of the mandrel on the wire spool base, and the conical surface at one end of the wire spool is tightly fitted and connected to the conical surface at the bottom of the wire spool base.

[0006] A positioning sleeve is fixedly fitted on the mandrel, and the outer diameter of the positioning sleeve can fit with the inner diameter of the spool. A guide sleeve is slidably provided on the outer peripheral wall of the spool base along its axial direction. The end of the guide sleeve facing the positioning sleeve is a flared end, which is used to support the conical surface of one end of the spool and to be tightly connected to the conical surface of the spool base after the spool passes through the positioning sleeve.

[0007] As another optimized solution for the above-mentioned wire take-up and feed mechanism for a cutting machine: the inner wall of the flared end of the guide sleeve is provided with a groove along its circumference for the tapered surface of the wire feed wheel to abut against it.

[0008] As another optimized solution for the above-mentioned wire take-up and unwinding mechanism for a cutting machine: multiple grooves are provided on the inner peripheral wall of the guide sleeve along its axial direction, and multiple slide rails are correspondingly provided on the outer peripheral wall of the wire wheel base baffle for inserting into and slidingly engaging with the corresponding grooves.

[0009] As another optimized solution for the above-mentioned wire take-up and unwinding mechanism for a cutting machine: a wire wheel cover is installed at the end of the wire wheel away from the wire wheel base, and a clamping screw for inserting into the threaded hole at the end of the mandrel is provided in the middle of the wire wheel cover.

[0010] As another optimized solution for the above-mentioned wire take-up and unwinding mechanism for a cutting machine: the middle part of the mandrel is an enlarged part, and the positioning sleeve is fixed to the enlarged part of the mandrel by screws.

[0011] As another optimization scheme for the above-mentioned wire take-up and unwinding mechanism for a cutting machine: the diameter of the enlarged part of the mandrel is 1 to 3 times the diameter of the normal part of the mandrel excluding the enlarged part.

[0012] As another optimized solution for the above-mentioned wire take-up and unwinding mechanism for a cutting machine: the positioning sleeve has four bolt holes along its circumference for screws to pass through, and the mandrel expansion part has multiple threaded holes for corresponding alignment with the bolt holes.

[0013] As another optimized solution for the above-mentioned wire take-up and unwinding mechanism for a cutting machine: the end of the wire reel base away from the wire reel is connected to the power source via a bearing housing.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The present invention provides a positioning sleeve on the spindle of the reel base. The outer peripheral wall of the positioning sleeve can fit against the inner peripheral wall of the reel, ensuring that the reel and the reel base are aligned, improving the concentricity of the reel and the reel base, thereby reducing the phenomenon of frequent wire breakage and snagging when the reel rotates at high speed during winding and unwinding.

[0016] Furthermore, the end of the guide sleeve facing the positioning sleeve is a flared end. The guide sleeve is slidably mounted on the outer peripheral wall of the reel base's retaining edge. The flared end can slide axially with the guide sleeve to be located outside the positioning sleeve. When the reel needs to be installed, the conical surface of one end of the reel can abut against the end face of the flared end. The reel can quickly pass through the positioning sleeve and tightly connect with the conical surface of the reel base as the guide sleeve slides, and the conical surface of the reel can fit against the conical surface of the reel base. The guide sleeve allows the reel to be quickly aligned and installed on the reel base via the positioning sleeve. Attached Figure Description

[0017] Figure 1 A cross-sectional view of the sheave flange abutting against the end face of the flared end of the guide sleeve;

[0018] Figure 2 A cross-sectional view showing the conical surface of the spool fitting against the conical surface of the spool base after it passes through the positioning sleeve.

[0019] Reference numerals in the attached drawings: 1. Thread reel base; 101. Mandrel; 102. Enlarged part; 2. Positioning sleeve; 3. Thread reel; 4. Thread reel cover; 5. Clamping screw; 6. Guide sleeve; 601. Horn-shaped open end; 7. Bearing box. Detailed Implementation

[0020] The technical solution of this utility model will be further described in detail below with reference to specific embodiments. Parts of this utility model that are not described in detail in the following embodiments, such as the power source being a general term for power-driven equipment such as human power, electric motor and engine, the model and specifications of the motor that drives the base of the drive line to rotate, the connection method between the motor and the drive wheel base to rotate through the bearing box, the conical surface on the wheel base and the conical surface at the end of the wheel, etc., should all be understood as prior art known or should be known by those skilled in the art.

[0021] like Figure 1 As shown, a wire take-up and unwinding mechanism for a cutting machine includes a wire wheel 3, a wire wheel base 1, a positioning sleeve 2, a guide sleeve 6, a bearing housing 7 for mounting the wire wheel base 1, and a power source for driving the wire wheel base 1 to rotate. The wire wheel 3 can be sleeved on the wire wheel base 1 and arranged around the spindle 101. The conical surface of the wire wheel 3 facing the wire wheel base 1 can be tightly connected with the conical surface at the bottom edge of the wire wheel base 1.

[0022] The mandrel 101 has a partial enlargement in the middle to form an enlarged portion 102. The portion other than the enlarged portion 102 is a normal portion with a normal diameter. The diameter of the enlarged portion 102 is approximately twice the diameter of the normal portion of the mandrel 101. A positioning sleeve 2 is fitted and fixed onto the enlarged portion 102. The positioning sleeve 2 is made of nylon, and its inner diameter is adapted to fit the enlarged portion 102 of the mandrel 101, allowing the positioning sleeve 2 to be installed on the enlarged portion 102.

[0023] The positioning sleeve 2 has four bolt holes evenly spaced along its circumference. The expanded portion 102 of the mandrel 101 has four threaded holes corresponding to the bolt holes along its circumference. A screw is fitted into each aligned bolt hole and threaded hole. The positioning sleeve 2 is fixed to the expanded portion 102 of the mandrel 101 by these screws. The outer diameter of the positioning sleeve 2 is approximately equal to the inner diameter of the spool 3, so that when the spool 3 is mounted on the spool base 1, the inner circumferential wall of the spool 3 fits snugly against the outer circumferential wall of the positioning sleeve 2.

[0024] The guide sleeve 6 is slidably fitted onto the outer peripheral wall of the bottom flange of the spool base 1, and the guide sleeve 6 can slide along the axial direction of the spool base 1. Multiple grooves (not shown in the figure) are evenly spaced on the inner peripheral wall of the guide sleeve 6, and all grooves are arranged along the axial direction of the guide sleeve 6. A slide rail (not shown in the figure) is provided on the corresponding outer peripheral wall of the spool base 1 at the position of each groove. The slide rails are fixed along the axial direction of the spool base 1, and pass into the corresponding groove on the side of the groove, and can slide within the groove as the guide sleeve 6 slides, so that the guide sleeve 6 can be slidably fitted onto the outer peripheral wall of the flange of the spool base 1 or slide off the spool base 1.

[0025] The guide sleeve 6 has a flared end 601 facing the positioning sleeve 2. The guide sleeve 6 can slide along the spool base 1 until its flared end 601 is located outside the positioning sleeve 2. A groove (not shown in the figure) is provided on the end face of the flared end 601 along its circumference. The end face of the spool 3 facing the spool base 1 is a conical surface that can fit tightly with the conical surface at the bottom edge of the spool base 1. The edge part at the conical surface of the spool 3 abuts in the groove. The groove positions the spool 3 and prevents the spool 3 from tilting.

[0026] like Figure 2 As shown, as the spool 3 moves toward the spool base 1, it pushes the guide sleeve 6 to slide away from the positioning sleeve 2. The spool 3, following the sliding of the guide sleeve 6, smoothly passes through the positioning sleeve 2 and continues to move toward the spool base 1 until the conical surface of the spool 3 is tightly fitted with the conical surface of the spool base 1. After the spool 3 is installed on the spool base 1, the guide sleeve 6 slides off the spool base 1.

[0027] By setting the positioning sleeve 2, the mechanism can ensure that the spool 3 is centered and installed on the spool base 1, thereby improving the concentricity between the spool 3 and the spool base 1. This reduces the occurrence of wire breakage and other problems caused by the swaying of the cutting wire when the spool 3 rotates at high speed due to the decreased concentricity of the two installations, which could affect the operation of the equipment.

[0028] The end of the spool 3 furthest from the spool base 1 has a conical surface. A spool cover 4 is fitted onto this conical surface of the spool 3. The outer circumferential surface of the spool cover 4 is a conical surface that fits snugly against the conical surface of the spool 3 at that location. A mounting hole is provided in the middle of the spool cover 4, and a clamping screw 5 is inserted into the mounting hole. A threaded hole distributed along the axis of the spindle 101 is provided on the outer end of the spindle. The threaded end of the clamping screw 5 is rotated into the threaded hole of the spindle 101. The clamping screw 5 can fix the position of the spindle 101 and can firmly fix the spool 3 to the spool base 1 by clamping the spool cover 4.

[0029] The bearing housing 7 is fixed to the reel base 1 by bolts. The bearing housing 7 can support and position the reel base 1. The power source for driving the reel base 1 to rotate is a motor. The motor can be connected to the reel base 1 through the bearing housing 7. Under the drive of the motor, the reel 3 fixed on the reel base 1 can rotate synchronously and stably take in and release the line.

Claims

1. A wire take-up and unwinding mechanism for a cutting machine, comprising a wire spool (3), a wire spool base (1), and a bearing housing (7) for mounting the wire spool base (1), wherein the wire spool (3) is sleeved on the outer periphery of a mandrel (101) on the wire spool base (1), and the conical surface at one end of the wire spool (3) is tightly fitted with the conical surface at the bottom of the wire spool base (1), characterized in that: A positioning sleeve (2) is fixedly fitted on the spindle (101). The outer diameter of the positioning sleeve (2) can fit with the inner diameter of the spool (3). A guide sleeve (6) is slidably provided on the outer peripheral wall of the spool base (1) along its axial direction. The end of the guide sleeve (6) facing the positioning sleeve (2) is a flared end (601). The flared end (601) is used to support the conical surface of one end of the spool (3) and is tightly connected to the conical surface of the spool base (1) after the spool (3) passes through the positioning sleeve (2).

2. The wire take-up and unwinding mechanism for a cutting machine according to claim 1, characterized in that: The inner wall of the flared end (601) of the guide sleeve (6) is provided with a tapered surface of one end of the wire feeding wheel (3) that abuts into a matching groove.

3. The wire take-up and unwinding mechanism for a cutting machine according to claim 1, characterized in that: The inner circumferential wall of the guide sleeve (6) has multiple grooves distributed along its axial direction, and the outer circumferential wall of the sheave base (1) is provided with multiple slide rails for inserting into and slidingly engaging with the corresponding grooves.

4. The wire take-up and unwinding mechanism for a cutting machine according to claim 1, characterized in that: A spool cover (4) is fitted at one end of the spool (3) away from the spool base (1), and a clamping screw (5) is provided in the middle of the spool cover (4) for inserting into the threaded hole at the end of the spindle (101).

5. The wire take-up and unwinding mechanism for a cutting machine according to claim 1, characterized in that: The middle part of the mandrel (101) is the enlarged part (102), and the positioning sleeve (2) is fixed to the enlarged part (102) of the mandrel (101) by screws.

6. The wire take-up and unwinding mechanism for a cutting machine according to claim 5, characterized in that: The diameter of the enlarged portion (102) of the mandrel (101) is 1 to 3 times the diameter of the normal portion of the mandrel (101) excluding the enlarged portion (102).

7. A wire take-up and unwinding mechanism for a cutting machine according to claim 5, characterized in that: The positioning sleeve (2) has four bolt holes along its circumference for screws to pass through, and the enlarged part (102) of the spindle (101) has multiple threaded holes for corresponding alignment with the bolt holes.

8. The wire take-up and unwinding mechanism for a cutting machine according to claim 1, characterized in that: The end of the reel base (1) away from the reel (3) is connected to the power source via a bearing housing (7).

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