Deviation elimination positioning hot melting mechanism for welding aluminum keyboard
By using a differential positioning hot-melt mechanism in the hot-melt welding of aluminum keyboards, and utilizing the design of buffer springs and stepped holes, the adaptive movement of the hot-melt column is achieved, solving the problem of uneven pressure at the welding point and ensuring the stability and firmness of the keyboard welding.
Patent Information
- Application Number
- CN202422889529.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-11-26
AI Technical Summary
In the existing technology, during the hot melt welding process of aluminum keyboards, uneven pressure at the fusion point may occur due to machining tolerances and hot melt column tolerances, which may cause keyboard deformation or weak welding.
The differential positioning hot-melt mechanism is adopted, including a hot-melt column positioning plate and a hot-melt column baffle. By setting buffer springs and stepped holes on the hot-melt column, the adaptive movement of the hot-melt column under force is realized, and the pressure at the welding position is adjusted to prevent it from being too large or too small.
It effectively eliminates the influence of machining tolerances on the hot-melt process, avoids keyboard deformation and weak welding, and ensures the stability and firmness of the welding position.
Smart Images
Figure CN223533016U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of computer production equipment, and in particular to a differential positioning hot-melt mechanism for welding aluminum keyboards. Background Technology
[0002] Hot-melt welding using hot-melt pillars is a common keyboard assembly method. In current production, hot-melt pillars of fixed height are generally used for welding according to the product design requirements. However, due to the tolerances of product processing and the hot-melt pillars themselves, the hot-melt pillars and the hot-melt positions of the product are sometimes too tight and sometimes have gaps during actual assembly and welding. When it is too tight, the keyboard is subjected to excessive force, which may cause the keyboard to deform. When the gap is too large, the welding position may not be strong. Utility Model Content
[0003] The main technical problem solved by this utility model is to provide a differential positioning hot-melt mechanism for welding aluminum keyboards, which can solve the problems of uneven pressure at the welding point, weak welding or keyboard deformation under stress during hot-melt welding.
[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: providing a differential positioning hot-melt mechanism for welding aluminum keyboards, the differential positioning hot-melt mechanism including a hot-melt column positioning plate and a hot-melt column baffle, the hot-melt column baffle being installed behind the hot-melt column positioning plate, the hot-melt column positioning plate having hot-melt column differential mounting positions corresponding one-to-one with the positions of the protrusions on the upper cover of the aluminum keyboard, the hot-melt column, after being installed in the differential mounting position, can move longitudinally adaptively after being subjected to force, eliminating the influence of processing errors on the hot-melt action, the hot-melt column baffle being installed behind the hot-melt column positioning plate, which can limit the movement range of the hot-melt column.
[0005] In a preferred embodiment of this utility model, the hot-melt column differential mounting position includes a positioning hole and a stepped hole. The stepped hole is coaxial with the positioning hole and located at the root of the positioning hole. The hot-melt column includes a column body and a welding joint. A frustum is provided between the column body and the welding joint. The diameter of the column body is smaller than the diameter of the positioning hole, and the outer diameter of the frustum is larger than the diameter of the positioning hole. A buffer spring with a diameter between the frustum and the positioning hole is fitted on the column body. When the hot-melt column is installed in the hot-melt column differential mounting position, the column body is inserted into the positioning hole, and the buffer spring on the column body is in a compressed state. The tail end of the column body is connected to a locking nut installed in the stepped hole. The depth of the stepped hole is greater than the countersunk thickness of the hot-melt column locking nut. The height of the welding joint is 5-8 mm, and the difference between the depth of the stepped hole and the countersunk thickness of the locking nut is not less than the height of the welding joint. The diameter of the frustum is at least 1 mm larger than the diameter of the positioning hole.
[0006] The beneficial effects of this utility model are: This utility model is an optimization of the existing hot-melt method. By installing a special hot-melt positioning mechanism on the hot-melt upper mold, the upper and lower positions are automatically adjusted according to the hot-melt position state during the hot-melt process, thereby effectively eliminating the influence of the tolerance generated during the material stacking process on the hot-melt action, avoiding the problem of excessive local pressure caused by the hot-melt point being too tight, which leads to keyboard deformation, and the problem of weak welding caused by the large gap of the hot-melt point. Attached Figure Description
[0007] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention;
[0008] Figure 2 This is a schematic diagram of the hot melt column installation structure in the illustrated embodiment;
[0009] The components in the attached diagram are labeled as follows:
[0010] 1. Keyboard, 2. Hot melt pillar, 3. Buffer spring, 4. Locking nut, 5. Hot melt pillar positioning plate, 6. Hot melt pillar baffle, 7. Connecting bolt, 8. Lower positioning plate, 9. Hot melt lower mold;
[0011] 201. Column body, 202. Frustum, 203. Weld joint, 501. Hot melt column differential mounting position, 502. Bolt connection hole. Detailed Implementation
[0012] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.
[0013] Please see Figure 1 and Figure 2 The embodiments of this utility model include:
[0014] A differential positioning hot-melt mechanism for welding aluminum keyboards includes a hot-melt column positioning plate 5 and a hot-melt column baffle 6. The hot-melt column positioning plate 5 is provided with hot-melt column differential mounting positions 501 that correspond one-to-one with the positions of the protruding columns on the upper cover of the aluminum keyboard 1. After the hot-melt column 2 is installed in the differential mounting position 501, it can move adaptively up and down longitudinally after being subjected to force, eliminating the influence of processing errors on the hot-melt column 2 and preventing the welding point pressure from being too high or too low. Both the hot-melt column positioning plate 5 and the hot-melt column baffle 6 are provided with corresponding bolt connection holes 502. The hot-melt column baffle 6 is fixed behind the hot-melt column positioning plate 5 by connecting bolts 7, which can limit the movement range of the hot-melt column 2 and prevent the tail end of the hot-melt column 2 from coming out of the hot-melt column differential mounting position 501.
[0015] The hot-melt column mounting position 501 includes a positioning hole and a stepped hole. The stepped hole is coaxial with the positioning hole and located at the root of the positioning hole. The hot-melt column 2 includes a column body 201 and a welding joint 203. A frustum 202 is provided between the column body 201 and the welding joint 203. The diameter of the column body 201 is smaller than the diameter of the positioning hole, and the outer diameter of the frustum 202 is larger than the diameter of the positioning hole. In actual implementation, the diameter of the column body 201 is generally 4mm, and the diameter of the frustum 202 is 8mm. The diameter of the hole is 6mm. A buffer spring 3 with a diameter between the frustum 202 and the positioning hole is fitted onto the column body 201. The inner diameter of the buffer spring 3 is the same as the diameter of the positioning hole, which is also 6mm. When the hot melt column 2 is installed into the hot melt column offset mounting position 501, the column body 201 is inserted into the positioning hole. At this time, the buffer spring 3 is in a compressed state. The tail end of the column body 201 is connected to the locking nut 4 installed in the stepped hole. The depth of the stepped hole is greater than the countersunk thickness of the locking nut 4. In this way, when the hot melt column 2, driven by the hot melt upper mold, touches the protrusion on the top cover of the keyboard 1, if the reaction force is too large, it will automatically retract along the direction of the stepped hole to avoid it, reducing the pressure on the keyboard 1. The height of the hot melt column 203 is generally 5-8mm. In actual operation, the height of the weld joint 203 is generally 5mm, and the difference between the depth of the stepped hole and the thickness of the countersunk head of the locking nut is also 5mm. The height of the weld joint 201 is determined by the height of the protrusion and the characteristics of the hot melt column 2. The purpose of the thickness difference being not less than the height of the weld joint 201 is to ensure that the weld joint 201 has sufficient retraction clearance space and completely eliminate the influence of tolerance.
[0016] The thickness of the frustum 202 is 3-5mm, generally 5mm. The frustum 202 cannot be too thick, which would affect the structure of the hot melt column, nor can it be too thin, otherwise the buffer spring 3 will easily deform when subjected to greater force.
[0017] The steps for hot-melting welding of the aluminum keyboard 1 using the aforementioned differential positioning hot-melt mechanism are as follows:
[0018] Step 1: Assemble the keyboard 1 and the top cover together and place them on the lower positioning plate 8 on the hot melt lower mold 9.
[0019] Step 2: Install the hot melt pillars 2 one by one into the differential positioning hot melt mechanism that matches the keyboard 1.
[0020] Step 3: Fix the differential positioning hot melt mechanism to the upper positioning plate on the hot melt upper mold so that all the differential installation positions 501 of the hot melt pillars are exactly above the corresponding upper cover plate protrusions.
[0021] Step 4: Activate the hot melt switch. The hot melt upper mold descends and heats the hot melt column 2, so that the weld joint 203 of the hot melt column 2 is fused with the protrusion on the upper cover. After the fusion is completed, the hot melt upper mold is reset, forming a mushroom head structure on the protrusion.
[0022] Step 5: Remove the product from the hot melt lower mold 9 and allow the mushroom-shaped structure to solidify before sending it to the next process.
[0023] In the above manner, during the hot melt welding of keyboard 1, the hot melt column 2 can maintain contact with the welding position under the action of the buffer spring 3, and can also automatically expand and contract with the change of pressure, so that the pressure at the welding position is kept constant. This prevents the keyboard 1 body from deforming due to excessive pressure at the welding position, and also prevents the welding strength from being insufficient due to insufficient pressure at the welding position.
[0024] It can effectively eliminate the influence of tolerances generated during material stacking and processing on the hot-melt process, and avoid problems such as deformation of aluminum keyboards and weak welding caused by excessive pressure during welding.
[0025] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A differential positioning hot-melt mechanism for welding aluminum keyboards, characterized in that, The differential-eliminating positioning hot-melt mechanism includes a hot-melt column positioning plate and a hot-melt column baffle. The hot-melt column baffle is installed behind the hot-melt column positioning plate. The hot-melt column positioning plate is provided with hot-melt column differential-eliminating mounting positions that correspond one-to-one with the positions of the protruding columns on the upper cover of the aluminum keyboard. After the hot-melt column is installed in the differential-eliminating mounting position, it can move longitudinally adaptively after being subjected to force, eliminating the influence of processing errors on the hot-melt action. The hot-melt column baffle is installed behind the hot-melt column positioning plate, which can limit the movement range of the hot-melt column.
2. The differential positioning hot-melt mechanism for welding aluminum keyboards according to claim 1, characterized in that, The hot-melt column differential mounting position includes a positioning hole and a stepped hole. The stepped hole is coaxial with the positioning hole and located at the root of the positioning hole. The hot-melt column includes a column body and a welding joint. A frustum is provided between the column body and the welding joint. The diameter of the column body is smaller than the diameter of the positioning hole, and the outer diameter of the frustum is larger than the diameter of the positioning hole. A buffer spring with a diameter between the frustum and the positioning hole is fitted on the column body. When the hot-melt column is installed in the hot-melt column differential mounting position, the column body is inserted into the positioning hole, and the buffer spring on the column body is in a compressed state. The tail end of the column body is connected to a locking nut installed in the stepped hole. The depth of the stepped hole is greater than the countersunk thickness of the hot-melt column locking nut.
3. The differential positioning hot-melt mechanism for welding aluminum keyboards according to claim 2, characterized in that, The height of the weld joint is 5-8m, and the difference between the depth of the stepped hole and the thickness of the countersunk head of the locking nut is not less than the height of the weld joint.
4. The differential positioning hot-melt mechanism for welding aluminum keyboards according to claim 2, characterized in that, The thickness of the frustum is 3-5 mm.
5. The differential positioning hot-melt mechanism for welding aluminum keyboards according to claim 2, characterized in that, The diameter of the frustum is at least 1 mm larger than the diameter of the positioning hole.