Elastomeric coupling for hot pressure welding and hot pressure welding machine using it

Abstract

The utility model relates to the field of hot pressure welding, concretely relates to a kind of elastic coupling for hot pressure welding and the hot pressure welding machine of applying it.The elastic coupling for hot pressure welding, including metal sleeve, the metal sleeve is provided with first slit section and second slit section along the axial direction;Wherein, the first slit section has multiple first slits, which are spaced along the axial direction and staggered in the first direction opposite;Wherein, the second slit section has multiple second slits, which are spaced along the axial direction and staggered in the second direction opposite, the second direction is perpendicular to the first direction.The utility model can realize precise axial buffering while torque transmission, deviation compensation, to solve the problem existing in the prior art hot pressure welding machine.

Description

Technical Field

[0001] This utility model relates to the field of hot-press welding, specifically to a flexible coupling for hot-press welding and a hot-press welding machine using the same. Background Technology

[0002] Thermopressing is a key process in modern electronic packaging. A typical thermopressing machine works as follows: First, a suction nozzle mechanism uses negative pressure to pick up and adsorb the chip; then, a drive mechanism (such as a motor) drives the suction nozzle and the chip it has adsorbed to rotate to a predetermined angle; finally, a lifting mechanism (such as an electric cylinder) is used to precisely press the chip onto the corresponding pad on the circuit board, and heating causes the solder paste to flow back, thereby achieving a stable electrical and mechanical connection between the chip and the circuit board.

[0003] During this process, especially in the initial moment of chip adsorption and the pressing stage of thermoforming, the nozzle mechanism is inevitably subjected to axial impact forces. If these impact forces are directly transmitted to the delicate chip, they can easily cause the chip to crack or be damaged due to stress concentration. To address this, existing technologies typically incorporate a dedicated elastic buffer mechanism (such as a spring) within the nozzle mechanism of the thermopressor to absorb and buffer these axial impacts, protecting the chip.

[0004] However, the introduction of an independent elastic buffer mechanism also brings a series of new problems: First, it increases the structural complexity and number of parts of the entire suction nozzle assembly, leading to increased manufacturing costs; second, the complex mechanical structure reduces the rigidity and response speed of the system, and may introduce more assembly errors and potential failure points, affecting the long-term operational reliability and maintainability of the equipment.

[0005] The inventors of this patent considered that in the design of a hot press, a flexible coupling is inherently configured between the output shaft of the motor driving the suction nozzle mechanism and the main shaft of the suction nozzle mechanism to transmit torque and compensate for possible radial and angular misalignments between the two shafts. This discovery inspired a new technical approach: if the existing flexible couplings used for hot pressing and welding can be innovatively designed to provide suitable axial elastic buffering while efficiently transmitting torque and motion, then it may be possible to completely eliminate the aforementioned independent elastic buffering mechanism. This would not only simplify the overall structure and reduce costs, but also reduce the probability of failure caused by additional mechanisms, and improve equipment integration and reliability.

[0006] However, conventional flexible couplings (such as cloverleaf type, diaphragm type, bellows type, etc.) are mainly designed to compensate for deviations and transmit torque. Their axial stiffness is usually large, and the control of buffer stroke and buffer force is not precise enough, making it difficult to meet the micron-level, controllable flexible buffer required by chip adsorption and hot-press bonding processes.

[0007] Therefore, the existing technology lacks a coupling that can simultaneously and efficiently perform the dual functions of torque transmission, deviation compensation, and precision axial buffering. This has become a technical problem that urgently needs to be solved to realize the technical concept and further optimize the structure of the hot press. Summary of the Invention

[0008] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a flexible coupling for hot pressing welding, which can achieve precise axial buffering while transmitting torque and compensating for deviation, so as to solve the problems existing in the existing hot pressing welding machine.

[0009] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: a flexible coupling for hot-press welding, comprising a metal sleeve, wherein the metal sleeve is provided with a first slit section and a second slit section along the axial direction; wherein... The first slit segment has a plurality of first slits spaced apart along the axial direction and staggered in a first direction; wherein... The second slit segment has a plurality of second slits spaced apart along the axial direction and staggered in a second direction, the second direction being perpendicular to the first direction.

[0010] Furthermore, the circumferential angles of both the first and second slits are greater than 90 degrees.

[0011] Furthermore, the circumferential angles of both the first and second slits are 135 degrees.

[0012] Furthermore, the number of the first cut and the number of the second cut are equal.

[0013] Furthermore, both ends of the metal sleeve are connecting ends, and each connecting end is divided into two clamping parts by a radial groove. The two clamping parts are respectively provided with through holes for the locking bolts to pass through.

[0014] Furthermore, the radial groove on the connecting end near the first slit segment is parallel to the first direction, and the radial groove on the connecting end near the second slit segment is parallel to the second direction.

[0015] This utility model also relates to a hot press welding machine, including a flexible coupling for hot press welding.

[0016] Furthermore, the hot press welding machine also includes a lifting drive mechanism, a rotary drive mechanism, and a suction nozzle mechanism. The rotary drive mechanism is connected to the suction nozzle mechanism via the flexible coupling for hot press welding to drive rotation, and the lifting drive mechanism is connected to the rotary drive mechanism to drive lifting.

[0017] After adopting the above technical solution, the multiple first slits of the first slit segment are staggered in the first direction, and the multiple second slits of the second slit segment are staggered in the second direction perpendicular to the first direction. Through the cooperation of the first and second slit segments, effective axial precision buffering in both the first and second directions can be achieved simultaneously with torque transmission and deviation compensation. Furthermore, without closed-loop slits, the torsional stiffness is higher, effectively suppressing torsion. Applying this flexible coupling to a hot-press welding machine eliminates the need for the existing flexible buffer mechanism, reducing the number of parts. This not only simplifies the overall structure and reduces costs but also reduces the probability of failure caused by additional mechanisms, improving equipment integration and reliability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the flexible coupling for hot pressing welding according to this utility model; Figure 2 for Figure 1 The main view; Figure 3 for Figure 1 Top view; Figure 4 for Figure 3 AA section view; Figure 5 This is a schematic diagram of the hot press welding machine of this utility model; In the figure, 1 is a metal sleeve; 11 is the first slit segment; 111 is the first slit; 12 is the second slit segment; 121 is the second slit; 13 is the connecting end; 131 is the radial groove; 132 is the clamping part; 1321 is the through hole; 2 is the lifting drive mechanism; 3 is the rotation drive mechanism; and 4 is the suction nozzle mechanism. Detailed Implementation

[0019] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0020] Example 1: As Figures 1 to 5 As shown, a flexible coupling for hot-press welding includes a metal sleeve 1, which has a first slit section 11 and a second slit section 12 arranged axially; wherein, The first slit segment 11 has a plurality of first slits 111 that are spaced apart along the axial direction and staggered in a first direction; The second slit segment 12 has a plurality of second slits 121 that are spaced apart along the axial direction and staggered in a second direction, the second direction being perpendicular to the first direction.

[0021] Specifically, the multiple first slits 111 of the first slit segment 11 are staggered in a first direction, and the multiple second slits 121 of the second slit segment 12 are staggered in a second direction perpendicular to the first direction. Through the cooperation of the first slit segment 11 and the second slit segment 12, effective axial precision buffering in both the first and second directions can be achieved while transmitting torque and compensating for deviations. Furthermore, without closed-loop slits, the torsional stiffness is higher, effectively suppressing torsion. Applying this flexible coupling to a hot-press welding machine eliminates the need for the existing flexible buffer mechanism, reducing the number of parts. This not only simplifies the overall structure and reduces costs but also reduces the probability of failure caused by additional mechanisms, improving equipment integration and reliability.

[0022] In this embodiment, the number of first slits 111 and second slits 121 may be equal or unequal, but preferably equal.

[0023] In this embodiment, preferably, as follows: Figure 1 , Figure 2 and Figure 4 As shown, a plurality of first slits 111 and a plurality of second slits 121 are arranged at equal intervals along the axial direction of the metal sleeve 1, and the interval between adjacent first slits 111 is equal to the interval between adjacent second slits 121.

[0024] It should be noted that the first slit 111 is cut along the first direction, and the second slit 121 is cut along the second direction. When the axial direction of the metal sleeve 1 is Z, the first direction and the second direction can be X and Y, respectively.

[0025] In this embodiment, preferably, the circumferential angles of both the first slit 111 and the second slit 121 are greater than 90 degrees.

[0026] For ease of description, we will use the first direction as the front-back direction and the second direction as the left-right direction as an example.

[0027] If the circumferential angle of the first slit 111 is greater than 90 degrees, then the first slits 111 distributed on the front and rear sides of the first slit segment 11 coincide on the left and right sides of the metal sleeve 1 in the axial direction of the metal sleeve 1. That is, the first slit segment 11 has dense slits on the left and right sides and sparse slits on the front and rear sides, which can provide effective axial precision buffering on the left and right sides and provide the rigidity required for torque transmission of the coupling on the front and rear sides.

[0028] If the circumferential angle of the second slit 121 is greater than 90 degrees, then the second slits 121 distributed on the left and right sides of the second slit segment 12 coincide at the front and rear positions of the metal sleeve 1 along the axial direction of the metal sleeve 1. That is, the second slit segment 11 has sparse slits at the left and right positions and dense slits at the front and rear positions, which can provide effective axial precision buffering at the front and rear positions and provide the rigidity required for torque transmission of the coupling at the left and right positions.

[0029] In this way, the entire flexible coupling can better and more efficiently perform the dual roles of torque transmission, deviation compensation, and precision axial buffering.

[0030] More preferably, the circumferential angles of the first slit 111 and the second slit 121 are both 135 degrees.

[0031] Thus, the first slit 111 is sparse within the 90-degree central angle range at the front and rear of the metal sleeve 1, and dense within the 90-degree central angle range at the left and right, while the second slit 121 is sparse within the 90-degree central angle range at the left and right of the metal sleeve 1, and dense within the 90-degree central angle range at the front and rear. This allows the entire coupling to achieve axial precision buffering in all directions of the circumference while meeting the requirement of omnidirectional rigidity, thereby further improving its performance.

[0032] In this embodiment, as Figures 1 to 5 As shown, both ends of the metal sleeve 1 are connecting ends 13. Each connecting end 13 is divided into two clamping parts 132 by a radial groove 131. The two clamping parts 132 are respectively provided with through holes 1321 for the locking bolt to pass through.

[0033] In use, insert the shafts of the two components to be connected by the flexible coupling by hot pressing into the corresponding connection ends 13. Then, insert one locking bolt into the through hole 1321 on one side of the two clamping parts 132 and tighten the locking nut. Insert another locking bolt into the through hole 1321 on the other side of the two clamping parts 132 and tighten the locking nut to complete the assembly.

[0034] In this embodiment, preferably, as shown in the figure Figure 1 , Figure 2 and Figure 4 As shown, the radial groove 131 on the connecting end 13 near the first slit segment 11 is parallel to the first direction, and the radial groove 131 on the connecting end 13 near the second slit segment 12 is parallel to the second direction.

[0035] Considering that the peripheral wall of the first slit segment 11, perpendicular to the first direction, retains more metal material and has higher strength and hardness, the radial groove 131 on the connecting end 13 near the first slit segment 11 is parallel to the first direction. Similarly, considering that the peripheral wall of the second slit segment 12, perpendicular to the second direction, also retains more metal material and has higher strength and hardness, the radial groove 131 on the connecting end 13 near the second slit segment 12 is parallel to the second direction. This minimizes the impact on the strength of the metal sleeve 1 caused by the radial groove 131.

[0036] Example 2: Figure 5 As shown, a hot press welding machine includes a flexible coupling for hot press welding as described in Embodiment 1.

[0037] like Figure 5 As shown, the hot press welding machine also includes a lifting drive mechanism 2, a rotary drive mechanism 3, and a suction nozzle mechanism 4. The rotary drive mechanism 3 is connected to the suction nozzle mechanism 4 through a flexible coupling for hot press welding to drive rotation, and the lifting drive mechanism 2 is connected to the rotary drive mechanism 3 to drive lifting.

[0038] The lifting drive mechanism 2 can be a linear module, an electric cylinder, etc., and the rotary drive mechanism 3 can be a motor, etc. The hot press welding machine in this embodiment can eliminate the elastic buffer mechanism in the existing hot press welding machine, reduce the number of parts, not only simplify the overall structure and reduce costs, but also reduce the probability of failure caused by additional mechanisms, and improve the integration and reliability of the equipment.

[0039] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A flexible coupling for hot-press welding, characterized in that, Includes a metal sleeve (1), wherein the metal sleeve (1) is provided with a first slit section (11) and a second slit section (12) along the axial direction; wherein, The first slit segment (11) has a plurality of first slits (111) that are spaced apart along the axial direction and staggered in a first direction. The second slit segment (12) has a plurality of second slits (121) spaced apart along the axial direction and staggered in a second direction, the second direction being perpendicular to the first direction.

2. The flexible coupling for hot pressing welding according to claim 1, characterized in that, The circumferential angles of the first cut (111) and the second cut (121) are both greater than 90 degrees.

3. The flexible coupling for hot-press welding according to claim 2, characterized in that, The circumferential angles of the first cut (111) and the second cut (121) are both 135 degrees.

4. The flexible coupling for hot pressing welding according to claim 1, characterized in that, The number of the first cut (111) and the number of the second cut (121) are equal.

5. The flexible coupling for hot-press welding according to claim 1, characterized in that, Both ends of the metal sleeve (1) are connection ends (13). Each connection end (13) is divided into two clamping parts (132) by a radial groove (131). The two clamping parts (132) are respectively provided with through holes (1321) for the locking bolt to pass through.

6. The flexible coupling for hot-press welding according to claim 5, characterized in that, The radial groove (131) on the connecting end (13) near the first slit segment (11) is parallel to the first direction, and the radial groove (131) on the connecting end (13) near the second slit segment (12) is parallel to the second direction.

7. A hot press welding machine, characterized in that, Includes the flexible coupling for hot-press welding as described in any one of claims 1 to 6.

8. The hot press welding machine according to claim 7, characterized in that, It also includes a lifting drive mechanism (2), a rotating drive mechanism (3) and a suction nozzle mechanism (4). The rotating drive mechanism (3) is connected to the suction nozzle mechanism (4) through the thermo-press welding elastic coupling to drive rotation. The lifting drive mechanism (2) is connected to the rotating drive mechanism (3) to drive lifting.

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