Middle frame elastic sheet plane welding fixing device

Abstract

The utility model discloses a middle frame elastic piece plane welding fixing device which is used for fixing elastic pieces when the elastic pieces are welded on the front face and the back face of a middle frame and comprises a middle frame positioning mechanism, an elastic piece pressing mechanism, a lifting mechanism and a transverse moving mechanism. An elastic pressing head of the elastic piece pressing mechanism can be driven to press elastic pieces on the front face and the back face of the middle frame, an insulating jig of the middle frame positioning mechanism and a pressing head assembling plate of the elastic piece pressing mechanism can be replaced, and therefore the middle frame elastic piece welding device can be suitable for conducting elastic piece welding on middle frames of different sizes. The position of the elastic pressing head can be adjusted on the pressing head assembling plate based on the groove-shaped positioning through hole, the elastic pressing head is adopted for pressing the elastic piece, the middle frames with different thicknesses and sizes can be compatible, the welding reliability is greatly improved, and the problems of insufficient welding, deviation and the like are effectively solved.

Description

Technical Field

[0001] The utility model relates to the field of middle frame assembly of electronic products, in particular to a middle frame spring plate plane welding and fixing device. Background Art

[0002] Currently, a large number of electronic products on the market, such as mobile phone metal frames, have gold-plated shrapnel of varying sizes and materials. These shrapnel provide connectivity and electrical conductivity to meet the functional requirements of mobile phones. For example, shrapnel are welded to the front and back of a mobile phone's metal frame. Currently, the welding machines on the market are all fixed in size and cannot be compatible with a variety of mobile phone metal frames. They can only process a single size for laser welding between mobile phone metal frames and gold-plated shrapnel. Although mobile phone sizes are generally fixed and do not vary much, the position of the shrapnel in the middle frame of the same size will vary depending on the brand and model. In addition, due to wear caused by direct contact of the pressure head during positioning, it is necessary to process metal frames of different sizes. When welding gold-plated shrapnel, defects such as cold solder joints and misalignment occur frequently, and welding reliability needs to be improved.

[0003] The above information disclosed in this Background section is included only for enhancement of understanding of the background of the disclosure and therefore it may contain information that does not form the prior art that is currently known to a person of ordinary skill in the art. Utility Model Content

[0004] The technical problem to be solved by the present invention is to provide a plane welding and fixing device for a middle frame spring piece in view of the above-mentioned defect of insufficient welding reliability in the prior art.

[0005] The technical solution adopted by the utility model to solve the technical problem is to construct a plane welding and fixing device for the middle frame spring piece, which is used to fix the spring piece when welding the spring piece on the front and back sides of the middle frame. The device includes:

[0006] A middle frame positioning mechanism, with the welding mechanism arranged in the space above it. The middle frame positioning mechanism includes a support platform and an insulating jig detachably mounted on the support platform for positioning the front and back sides of the middle frame. Different sizes of middle frames are equipped with different jigs.

[0007] The spring sheet pressing mechanism comprises a pressing head assembly plate and an elastic pressing head for pressing down the spring sheet, wherein the pressing head assembly plate is provided with a slot-shaped positioning through hole for mounting at least one elastic pressing head in an adjustable position;

[0008] A lifting mechanism is detachably connected to the pressure head assembly plate, and is used to drive the pressure head assembly plate to rise and fall in the vertical direction to drive the elastic pressure head to press the spring sheet downward. Different sizes of middle frames are equipped with different pressure head assembly plates;

[0009] The transverse movement mechanism is arranged side by side with the support platform, and the lifting mechanism is arranged on the transverse movement mechanism. The transverse movement mechanism is used to drive the lifting mechanism to move transversely along the arrangement direction of the transverse movement mechanism and the support platform, so as to move it transversely above the spring sheet before the elastic pressure head presses down the spring sheet.

[0010] Furthermore, in the middle frame spring sheet plane welding and fixing device described in the present invention, a through hole is provided on the bottom surface of the middle frame, and the jig includes a contoured boss that matches the middle frame after being placed on the reverse side. A positioning pin that matches the through hole is detachably installed on the contoured boss, and when the front side of the middle frame is placed on the insulating jig, positioning is achieved based on the through hole and the positioning pin.

[0011] Furthermore, in the middle frame spring sheet plane welding and fixing device described in the present invention, the through holes are multiple and diagonally arranged, the contoured boss has two diagonally arranged positioning holes, and the positioning pins are vertically and tightly inserted into the positioning holes.

[0012] Furthermore, in the middle frame spring sheet plane welding and fixing device described in the present invention, a vacuum air hole is also opened on the contoured boss, and a vacuum suction cup is installed in the vacuum air hole. The vacuum suction cup is connected to the vacuum air circuit and the pressure switch, and the pressure switch is used to assist in detecting the presence or absence of the middle frame.

[0013] Furthermore, in the middle frame spring piece plane welding and fixing device described in the present invention, one side of the pressure head assembly plate is detachably connected to the lifting mechanism; a welding operation window that passes through the middle of the pressure head assembly plate and is adapted to the middle frame is opened up and down for the welding mechanism to perform welding operations on the spring piece; a plurality of the groove-shaped positioning through holes corresponding to the side edges of the middle frame are distributed around the welding operation window.

[0014] Furthermore, in the middle frame spring sheet plane welding and fixing device described in the present invention, the pressure head assembly plate is in the shape of a rectangular plate, the welding operation window is a rectangular window, and the plurality of groove-shaped positioning through holes are arranged on the outer circle of the welding operation window along the four sides of the welding operation window.

[0015] Furthermore, in the middle frame spring sheet plane welding and fixing device described in the present utility model, the elastic pressure head includes a pressure head, a spring structure, a spring fixing plate, a first Z-axis linear guide rail, and a pressure head fixing plate;

[0016] The bottom of the spring fixing plate is connected to the pressure head, the spring structure is vertically penetrated in the spring fixing plate and the bottom is against the pressure head, the top of the spring structure is against the pressure head fixing plate, the first Z-axis linear guide is fixed to the pressure head fixing plate, the spring fixing plate is slidably matched with the first Z-axis linear guide, and the pressure head fixing plate is detachably connected to the pressure head assembly plate through the groove-shaped positioning through hole.

[0017] Furthermore, in the middle frame spring plate plane welding and fixing device described in the utility model, the elastic pressure head further includes a guide rail baffle and a rubber ring; the pressure head fixing plate is L-shaped, including a vertical portion and a horizontal portion detachably connected to the pressure head assembly plate;

[0018] The guide rail baffle is vertically fixedly connected to the vertical portion of the pressure head fixing plate; the first Z-axis linear guide rail is fixed to the vertical portion of the pressure head fixing plate, and the upper end of the first Z-axis linear guide rail abuts against the horizontal portion of the pressure head fixing plate, and the lower end abuts against the guide rail baffle;

[0019] The spring fixing plate is provided with a spring mounting hole which is passed through from top to bottom and is used for mounting the spring structure. The spring mounting hole faces the horizontal portion of the pressure head fixing plate. The bottom end of the spring mounting hole is enlarged and the rubber ring is mounted thereon.

[0020] Furthermore, in the middle frame spring plate plane welding and fixing device described in the present invention, the lifting mechanism includes a second Z-axis linear guide rail, a cylinder, a first fixed vertical plate, a second fixed vertical plate, and a lifting base. The top of the first fixed vertical plate is vertically and detachably connected to one side of the pressure head assembly plate, the bottom of the second fixed vertical plate is vertically connected to the lifting base, the lifting base is connected to the transverse movement mechanism, the cylinder is fixed on the second fixed vertical plate and the telescopic end is connected to the first fixed vertical plate for driving the first fixed vertical plate to move up and down, the first fixed vertical plate is also slidably cooperated with the second Z-axis linear guide rail in the vertical direction, the second Z-axis linear guide rail is fixed on the second fixed vertical plate and the bottom is abutted against the lifting base.

[0021] Furthermore, in the middle frame spring sheet plane welding and fixing device described in the present utility model, the transverse movement mechanism includes a fixed base plate, a motor, an X-axis linear guide rail, a lead screw and a guide rail limiting plate;

[0022] The motor, X-axis linear guide, and guide rail limiting plate are fixed to the fixed base plate, the lead screw is parallel to the X-axis linear guide and is coaxially connected to the motor, the lifting base is connected to the lead screw nut on the lead screw and is also slidably engaged with the X-axis linear guide, and the two ends of the X-axis linear guide are respectively abutted against the guide rail limiting plate.

[0023] The middle frame spring piece plane welding and fixing device of the present invention has the following beneficial effects: the present invention can drive the pressure head to press the spring pieces on the front and back sides of the middle frame through the cooperation of the transverse movement mechanism and the lifting mechanism. The insulating jig and the pressure head assembly plate can be replaced to be suitable for welding spring pieces in middle frames of different sizes. More importantly, for middle frames of the same size, the position of the elastic pressure head can be adjusted based on the groove-shaped positioning through hole on the pressure head assembly plate. Moreover, the use of the elastic pressure head to press the spring piece can be compatible with middle frames of different thicknesses and sizes, greatly improving the welding reliability and effectively solving problems such as cold welding and misalignment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only embodiments of the present invention. Those skilled in the art can obtain other drawings based on the provided drawings without inventive work.

[0025] Figure 1 This is a structural diagram of the middle frame spring plate plane welding and fixing device of the utility model;

[0026] Figure 2 It is a structural diagram of the middle frame positioning mechanism;

[0027] Figure 3 It is a structural diagram of the shrapnel pressing mechanism;

[0028] Figure 4 It is a structural diagram of the pressure head;

[0029] Figure 5 It is a structural diagram of the lifting mechanism;

[0030] Figure 6 It is a structural diagram of the transverse movement mechanism. DETAILED DESCRIPTION

[0031] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the relevant drawings. Typical embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solutions of the present application, rather than limitations on the technical solutions of the present application. In the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other.

[0032] refer to Figure 1For the convenience of understanding in conjunction with the accompanying drawings, this article defines the left and right direction as the X-axis direction, the front and back direction as the Y-axis direction, and the up and down direction, that is, the vertical direction, as the Z-axis direction. The middle frame spring plate plane welding and fixing device of this embodiment includes a middle frame positioning mechanism 1, a spring plate pressing mechanism 2 that presses the spring plate down along the Z-axis direction, a lifting mechanism 3 that lifts and lowers along the Z-axis direction, and a transverse movement mechanism 4 that moves transversely along the X-axis direction. Among them, a welding mechanism is set in the space above the middle frame positioning mechanism 1. This embodiment is used to fix the spring plates when welding the spring plates on the front and back of the middle frame 5. The spring plates of the middle frame 5 include side spring plates and plane spring plates. This embodiment is used to fix the plane spring plates on the front and back of the middle frame when welding.

[0033] On the one hand, the transverse movement mechanism 4 is used to support the other mechanisms, and on the other hand, it is also the force for the lateral movement of the shrapnel pressing mechanism 2. The force for the shrapnel pressing mechanism 2 to rise and fall is solved by the lifting mechanism 3. The shrapnel pressing mechanism 2 is used to press the metal shrapnel so that it can be processed, such as welding. The shrapnel pressing mechanism 2 needs to be in direct contact with a variety of metal shrapnel made of different materials. The positioning of the mobile phone's metal middle frame 5 is solved by the middle frame positioning mechanism 1. The metal shrapnel and the mobile phone's metal middle frame 5 are both positioned before processing to meet the requirements of this device. It can solve defects such as cold welding and misalignment during welding, thereby expanding production capacity and product yield.

[0034] Each institution is described in detail below.

[0035] refer to Figure 2 , combined with Figure 1The middle frame positioning mechanism 1 includes a support platform 11 and an insulating jig 12 detachably mounted on the support platform 11 for positioning the middle frame 5 on the front and back sides. The support platform 11 is specifically composed of two front and rear facing platform base brackets 111 and a top base bracket fixing plate 112. The base bracket fixing plate 112 is horizontally fixed to the two platform base brackets 111 to ensure the parallelism of the entire middle frame positioning mechanism 1. Different sizes of middle frames 5 are equipped with different jigs 12. A through hole 51 is provided on the bottom surface of the middle frame 5. The jig 12 includes a contoured boss 121 that conforms to the middle frame 5 after it is placed on the back side. A positioning pin 122 that matches the through hole 51 is detachably mounted on the contoured boss 121. Specifically, the through holes 51 of the middle frame 5 are two and diagonally arranged. The contoured boss 121 has two diagonally arranged positioning holes. The positioning pin 121 is vertically and tightly inserted into the positioning hole. In this way, when the spring sheet is welded to the back side of the middle frame 5, the back side of the middle frame 5 is placed on the contoured boss 121, which can be understood as the middle frame 5 being inverted on the contoured boss 121; when the spring sheet is welded to the front side of the middle frame 5, the middle frame 5 is placed on the insulating jig 12 with its front side, and is positioned based on the positioning pin 122 inserted into the through hole 51. It should be noted that because the positioning pin 122 of this embodiment is set diagonally, it can be used not only for positioning the spring sheet when welding on the front side, but also for positioning the spring sheet when welding on the back side. That is, when welding on the back side, positioning is achieved based on the contoured fit of the contoured boss 121 and the fit of the positioning pin 122 with the through hole 51. Of course, if in his implementation, the positioning hole and positioning pin 122 are only suitable for front side welding, then when welding on the back side, the positioning pin 122 can be pulled out of the positioning hole.

[0036] In order to be compatible with a variety of mobile phone metal middle frames 5 of different sizes and materials, the jig 12 is made into a convenient disassembly model that can be quickly replaced, and the material selected is bakelite that is not easy to scratch the product. For example, the jig 12 is divided into two layers, the lower layer is the jig base plate, and the upper layer is the contoured boss 121. Different sizes of middle frames 5 correspond to different contoured bosses 121, but the jig base plates of all jigs 12 are the same, so that they can be uniformly positioned and assembled with the support platform 11. For example, holes can be drilled in the four corners of the jig base plates of all jigs 12, and positioning pins can be designed at the four corners of the base bracket fixing plate 112 of the support platform 11. The jig 12 can then be positioned and assembled through the cooperation of these pin holes and the positioning pins.

[0037] Furthermore, the contoured boss 121 is provided with a vacuum air hole 123, which is equipped with a vacuum suction cup. This vacuum cup is connected to a vacuum air circuit and a pressure switch. The pressure switch is used to assist in detecting the presence of the midframe 5. After the metal midframe 5 is positioned using the easily removable contoured Bakelite jig 12 and the locating pins 122, its position is determined. The suction cup is then used to securely secure the metal midframe 5 through the vacuum air hole 123. This prevents the midframe 5 from shifting during movement, and any vacuum break indicates defective material.

[0038] refer to Figure 3-4 , combined with Figure 1 The spring sheet pressing mechanism 2 includes a pressure head assembly plate 21 and an elastic pressure head 22 for pressing down the spring sheet. The pressure head assembly plate 21 is provided with a slot-shaped positioning through-hole 211 which is used to install at least one elastic pressure head 22 in an adjustable position. The number of elastic pressure heads 22 is determined by the number of spring sheets to be welded. Each elastic pressure head 22 is set separately, and the position of the elastic pressure head 22 can be adjusted according to demand. The height of the elastic pressure head 22 is adjusted by the lifting mechanism 3. When welding the spring sheet, the elastic pressure head 22 is adjusted to the top of the spring sheet through the transverse movement mechanism 4, and the spring sheet is pressed down to facilitate welding. After welding, it is raised by the lifting mechanism 3 and then driven back by the transverse movement mechanism 4.

[0039] Specifically, the pressure head assembly plate 21 is in the shape of a rectangular plate, and the side of the pressure head assembly plate 21 that is perpendicular to the X-axis direction and relatively farther away from the middle frame positioning mechanism 1 is detachably connected to the lifting mechanism 3, such as by screws, or bolts can be protruding from the lifting mechanism 3, bolt holes can be set on the pressure head assembly plate 21, and then the lifting mechanism 3 and the pressure head assembly plate 21 can be locked by nuts. In short, the specific detachable connection method between the lifting mechanism 3 and the pressure head assembly plate 21 is not limited. A welding operation window 210 that runs through the middle of the pressure head assembly plate 21 and is compatible with the middle frame 5 is provided. The welding operation window 210 is a rectangular window. The function of the welding operation window 210 is to avoid the airflow of the welding mechanism so that the welding mechanism can perform welding operations on the spring pieces. The welding operation window 210 is surrounded by a plurality of slot-shaped positioning holes 211 corresponding to the respective sides of the middle frame 5. Specifically, the slot-shaped positioning holes 211 are arranged along the outer circumference of the welding operation window 210, along the front, back, left, and right sides of the welding operation window 210. The four slot-shaped positioning holes 211 facilitate the rapid replacement of the pressing head 22 with different positions and allow the installation of different numbers of pressing heads.

[0040] refer to Figure 4The elastic pressing head 22 includes a pressing head 221, a spring structure 222, a spring fixing plate 223, a first Z-axis linear guide rail 224, a pressing head fixing plate 225, a guide rail baffle 226 and a rubber ring 227.

[0041] The bottom of the spring fixing plate 223 is connected to the press head 221. The spring structure 222 is vertically arranged in the spring fixing plate 223 and the bottom is against the press head 221. The top of the spring structure 222 is against the press head fixing plate 225. The first Z-axis linear guide 224 is fixed to the press head fixing plate 225. The spring fixing plate 223 and the first Z-axis linear guide 224 are slidably matched. The press head fixing plate 225 is detachably connected to the press head assembly plate 21 through the slotted positioning through hole 211. More specifically, the press head fixing plate 225 is L-shaped, including a vertical portion and a horizontal portion detachably connected to the press head assembly plate 21 by screws. The guide rail baffle 226 is vertically fixedly connected to the bottom edge of the vertical portion of the pressure head fixing plate 225; the first Z-axis linear guide 224 is fixed to the vertical portion of the pressure head fixing plate 225, and the upper end of the first Z-axis linear guide 224 abuts against the horizontal portion of the pressure head fixing plate 225, and the lower end abuts against the guide rail baffle 226. It can be seen that the pressure head fixing plate 225 is used to fix the position of the entire elastic pressure head 22 on the one hand, and serves as a fixing part and baffle of the linear guide 224 on the other hand. The guide rail baffle 226 is used to block the other end of the linear guide 224 to prevent the slider from derailing. The spring fixing plate 223 is provided with a spring mounting hole 2231 that runs through from top to bottom for mounting the spring structure 222. The spring mounting hole 2231 faces the horizontal portion of the pressure head fixing plate 225. The bottom end of the spring mounting hole 2231 is enlarged and the rubber ring 227 is mounted. If the pressing head 221 uses only one reference surface, the product will be damaged. Therefore, this embodiment uses a spring structure 222. When the processing surface has multiple reference surfaces, the spring structure 222 can adaptively solve the problem of multiple processing surfaces. In order to ensure the force and vibration during the spring compression movement, a linear guide rail 224 and a rubber ring 227 are also provided to allow the pressing head 221 to move in the required direction.

[0042] refer to Figure 5 , combined with Figure 1 The lifting mechanism 3 is detachably connected to the pressure head assembly plate 21 and is used to drive the pressure head assembly plate 21 to rise and fall in the vertical direction to drive the elastic pressure head 22 to press the spring sheet downward. Different sizes of middle frames 5 are configured with different pressure head assembly plates 21.

[0043] Specifically, the lifting mechanism 3 includes a second Z-axis linear guide rail 31 , a cylinder 32 , a first fixed vertical plate 33 , a second fixed vertical plate 34 , a lifting base 35 , a floating joint 37 , and a floating joint connecting plate 36 .

[0044] The top of the first fixed vertical plate 33 is detachably connected to one side of the pressure head assembly plate 21, and the bottom of the second fixed vertical plate 34 is vertically connected to the lifting base 35, and the lifting base 35 is connected to the transverse movement mechanism 4. The cylinder 32 is fixed to the second fixed vertical plate 34 and the telescopic end is connected to the floating joint connecting plate 36 through the floating joint 37. The floating joint connecting plate 36 is connected to the first fixed vertical plate 33, so that the cylinder 32 can drive the first fixed vertical plate 33 to move up and down. The impact force of the cylinder 32 is relatively large when it is used, and the floating joint 27 is used to achieve a buffering state. The two second Z-axis linear guides 31 are distributed on the front and back sides of the cylinder 32. The first fixed vertical plate 33 also slides with the two second Z-axis linear guides 31 in the vertical direction. The second Z-axis linear guide 31 is fixed to the second fixed vertical plate 34 and the bottom is against the lifting base 35. The existence of the second Z-axis linear guide 31 can prevent the equipment from vibrating greatly and reducing the service life of parts. The spring clip presses the lifting mechanism without vibration when moving, ensuring the benchmark.

[0045] refer to Figure 6 , combined with Figure 1 The transverse movement mechanism 4 and the support platform 11 are arranged side by side along the X-axis direction. The lifting mechanism 3 is arranged on the transverse movement mechanism 4, and the transverse movement mechanism 4 is used to drive the lifting mechanism 3 to move transversely along the arrangement direction of the transverse movement mechanism 4 and the support platform 11, so as to move the lifting mechanism 3 transversely above the spring sheet before the elastic pressing head 22 presses down the spring sheet.

[0046] Specifically, the transverse movement mechanism 4 includes a fixed base plate 47, a servo motor 41, a coupling 44, a ball screw 42 connected to the servo motor 41, an X-axis linear guide 43 matched with the ball screw 42, a motor mounting seat 45, a bearing 48, guide rail limiting plates 46, 49, and a nut connector 421.

[0047] The fixed base plate 47 is used to support the entire device on the one hand, and to fix components such as the X-axis linear guide 43, the screw 42, the motor mounting seat 45, the linear guide baffle 11, and the guide limit plates 46 and 49 on the other hand. The screw 42 is parallel to the X-axis linear guide 43, and the two X-axis linear guides 43 are distributed on the front and rear sides of the screw 42. One end of the screw 42 is coaxially connected to the motor 41 through a coupling 44, and the other end of the screw 42 is connected to the center of the guide limit plate 49 through a bearing 48. The lifting base 35 is connected to the screw nut on the screw 42 through a nut connector 421. The two linear guides 43 and the nut connector 48 connected to the ball screw can jointly ensure that the spring clamping mechanism 2 does not vibrate during the lateral movement and maintain the reference. The lifting base 35 also slides with the two front and rear X-axis linear guide rails 43 at the same time. The two ends of the X-axis linear guide rail 43 are respectively abutted against the guide rail limiting plates 46 and 49. The guide rail limiting plates 46 and 49 limit the stroke of the slider of the linear guide rail 43 to prevent the slider of the linear guide rail 43 from running out of the guide rail.

[0048] The primary power source for the traverse mechanism 4 is a servo motor 41, which transmits power to a ball screw 42 connected to the servo motor 41 via a coupling 44. The ball screw 42 rotates the ball screw nut, initiating movement and bringing the nut connector 421 with it. A motor mount 45 limits radial forces on the ball screw 42, while a linear guide baffle 49 and bearing 48 limit axial forces on the ball screw 42, ensuring that the servo motor 41 moves in the desired direction.

[0049] Compared with the prior art, this embodiment can provide more stable welding of metal middle frame spring pieces, improve product quality, increase production capacity, and avoid the problem of excessive product damage.

[0050] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0052] Terms containing ordinal numbers, such as "first" and "second," used in this specification may be used to describe various components, but these components are not limited by these terms. These terms are used solely to distinguish one component from another. For example, a first component may be named a second component, and similarly, a second component may be named a first component, without departing from the scope of the present invention.

[0053] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which are all within the protection of the present invention.

Claims

1. A plane welding and fixing device for a middle frame spring piece, used to fix the spring piece when welding the spring piece on the front and back sides of the middle frame, characterized in that: The device comprises: A middle frame positioning mechanism, with the welding mechanism arranged in the space above it. The middle frame positioning mechanism includes a support platform and an insulating jig detachably mounted on the support platform for positioning the front and back sides of the middle frame. Different sizes of middle frames are equipped with different jigs. The spring sheet pressing mechanism comprises a pressing head assembly plate and an elastic pressing head for pressing down the spring sheet, wherein the pressing head assembly plate is provided with a slot-shaped positioning through hole for mounting at least one elastic pressing head in an adjustable position; A lifting mechanism is detachably connected to the pressure head assembly plate, and is used to drive the pressure head assembly plate to rise and fall in the vertical direction to drive the elastic pressure head to press the spring sheet downward. Different sizes of middle frames are equipped with different pressure head assembly plates; The transverse movement mechanism is arranged side by side with the support platform, and the lifting mechanism is arranged on the transverse movement mechanism. The transverse movement mechanism is used to drive the lifting mechanism to move transversely along the arrangement direction of the transverse movement mechanism and the support platform, so as to move it transversely above the spring sheet before the elastic pressure head presses down the spring sheet.

2. The middle frame spring plate plane welding and fixing device according to claim 1, characterized in that: A through hole is provided on the bottom surface of the middle frame, and the jig includes a contoured boss that matches the middle frame after it is placed on the reverse side. A positioning pin that matches the through hole is detachably installed on the contoured boss. When the front side of the middle frame is placed on the insulating jig, positioning is achieved based on the through hole and the positioning pin.

3. The middle frame spring plate plane welding and fixing device according to claim 2, characterized in that: There are multiple through holes that are diagonally arranged. The contoured boss is provided with two positioning holes that are diagonally arranged. The positioning pins are vertically and tightly inserted into the positioning holes.

4. The middle frame spring plate plane welding and fixing device according to claim 2, characterized in that: The contoured boss is further provided with a vacuum air hole, wherein a vacuum suction cup is installed in the vacuum air hole. The vacuum suction cup is connected to a vacuum air circuit and a pressure switch, and the pressure switch is used to assist in detecting the presence of the middle frame.

5. The middle frame spring plate plane welding and fixing device according to claim 1, characterized in that: One side of the pressure head assembly plate is detachably connected to the lifting mechanism; a welding operation window that is adapted to the middle frame and passes through the upper and lower parts is provided in the middle of the pressure head assembly plate so that the welding mechanism can perform welding operations on the spring pieces; a plurality of the groove-shaped positioning through holes corresponding to the side edges of the middle frame are distributed around the welding operation window.

6. The middle frame spring plate plane welding and fixing device according to claim 5, characterized in that: The pressure head assembly plate is in the shape of a rectangular plate, the welding operation window is a rectangular window, and the plurality of slot-shaped positioning through holes are arranged on the outer circle of the welding operation window along the four sides of the welding operation window.

7. The middle frame spring plate plane welding and fixing device according to claim 1, characterized in that: The elastic pressing head includes a pressing head, a spring structure, a spring fixing plate, a first Z-axis linear guide rail, and a pressing head fixing plate; The bottom of the spring fixing plate is connected to the pressure head, the spring structure is vertically penetrated in the spring fixing plate and the bottom is against the pressure head, the top of the spring structure is against the pressure head fixing plate, the first Z-axis linear guide is fixed to the pressure head fixing plate, the spring fixing plate is slidably matched with the first Z-axis linear guide, and the pressure head fixing plate is detachably connected to the pressure head assembly plate through the groove-shaped positioning through hole.

8. The middle frame spring plate plane welding and fixing device according to claim 7, characterized in that: The elastic pressure head also includes a guide rail baffle and a rubber ring; the pressure head fixing plate is L-shaped, including a vertical portion and a horizontal portion detachably connected to the pressure head assembly plate; The guide rail baffle is vertically fixedly connected to the vertical portion of the pressure head fixing plate; the first Z-axis linear guide rail is fixed to the vertical portion of the pressure head fixing plate, and the upper end of the first Z-axis linear guide rail abuts against the horizontal portion of the pressure head fixing plate, and the lower end abuts against the guide rail baffle; The spring fixing plate is provided with a spring mounting hole which is passed through from top to bottom and is used for mounting the spring structure. The spring mounting hole faces the horizontal portion of the pressure head fixing plate. The bottom end of the spring mounting hole is enlarged and the rubber ring is mounted thereon.

9. The middle frame spring plate plane welding and fixing device according to claim 1, characterized in that: The lifting mechanism includes a second Z-axis linear guide, a cylinder, a first fixed vertical plate, a second fixed vertical plate, and a lifting base. The top of the first fixed vertical plate is vertically and detachably connected to one side of the pressure head assembly plate, the bottom of the second fixed vertical plate is vertically connected to the lifting base, the lifting base is connected to the transverse movement mechanism, the cylinder is fixed on the second fixed vertical plate and the telescopic end is connected to the first fixed vertical plate to drive the first fixed vertical plate to move up and down, the first fixed vertical plate is also slidably cooperated with the second Z-axis linear guide in the vertical direction, the second Z-axis linear guide is fixed on the second fixed vertical plate and the bottom is abutted against the lifting base.

10. The middle frame spring plate plane welding and fixing device according to claim 1, characterized in that: The transverse movement mechanism includes a fixed base plate, a motor, an X-axis linear guide rail, a lead screw and a guide rail limiting plate; The motor, X-axis linear guide, and guide rail limiting plate are fixed to the fixed base plate, the lead screw is parallel to the X-axis linear guide and is coaxially connected to the motor, the lifting mechanism is connected to the lead screw nut on the lead screw and is also slidably engaged with the X-axis linear guide, and the two ends of the X-axis linear guide are respectively abutted against the guide rail limiting plate.

Images