A lamp frame welding fixture

Abstract

This utility model discloses a lamp frame welding fixture with a composite positioning base, including a lower positioning part and an upper positioning part. The lower positioning part is used to simultaneously accommodate the lower frame of the lamp frame and the lower parts of multiple support bars, while the upper positioning part is used to accommodate the upper frame of the lamp frame. A multi-stage drive mechanism is connected to a first clamping component and controls its phased forward movement. The first clamping component, driven by the multi-stage drive mechanism, clamps the lower frame to a preset position in the first stroke and simultaneously clamps all support bars in the second stroke. A second clamping component is used to clamp the upper frame to the upper positioning part. This utility model constructs a partitioned and hierarchical positioning system, enabling the lower frame, support bars, and upper frame to complete initial positioning within independent positioning domains, avoiding error transmission during clamping. The multi-stage drive mechanism, in conjunction with the elastic clamping component, forms a gradient clamping control. Through the gradient clamping coordination of the first and second strokes, it effectively matches the structural stability requirements of different assembly stages.

Description

Technical Field

[0001] This utility model relates to the field of sheet metal welding fixture technology, specifically to an automatic positioning, correction and clamping welding fixture for solar lamp frame components, which is suitable for multi-station synchronous welding scenarios of thin-walled parts with specific spatial structures. Background Technology

[0002] In the field of solar lighting manufacturing, the lamp frame is typically constructed by welding together a top cover, a base, and multiple radial support strips. This type of component presents the following inherent technical challenges: First, due to the springback properties of sheet metal stampings, unpredictable localized deformation occurs after forming. Traditional welding fixtures use a rigid positioning structure. When the workpiece is placed in the fixture, the deformed area interferes with the positioning datum, preventing the workpiece from fully fitting the positioning surface. Operators must repeatedly adjust the workpiece's posture, resulting in low assembly efficiency.

[0003] Secondly, there is a positioning coupling problem when assembling multiple parts simultaneously. Existing technology adopts a step-by-step clamping strategy: first fix the base, and then install the support bars one by one. This process leads to two technical defects: first, after the base is initially fixed, there is still a slight displacement space, and the pressing force of the subsequent support bars will change the initial positioning of the base; second, the relative position between the support bars depends on manual visual alignment, and the accumulated error can easily lead to the distortion of the overall frame after welding. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a lamp frame welding fixture, which solves the problems of difficult welding and positioning of various structures of solar lamp frames, poor stability, and inability to compensate for deformation in traditional technology.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows: This utility model provides a lamp frame welding fixture, comprising: A composite positioning base includes a lower positioning part and an upper positioning part. The lower positioning part is used to simultaneously accommodate the lower frame of the lamp frame and the lower parts of multiple support bars, and the upper positioning part is used to accommodate the upper frame of the lamp frame. A multi-stage drive mechanism is connected to the first clamping component and controls its phased forward movement. The first pressing component, driven by the multi-stage driving mechanism, presses the lower frame to a preset position during the first stroke and simultaneously presses all the support bars during the second stroke. The second clamping component is used to clamp the upper frame against the upper positioning part.

[0006] In some embodiments, the first clamping assembly includes an elastic clamping block, the side of which is in contact with the lamp frame is an elastic material layer, and the elastic clamping block is used to absorb local deformation during the clamping phase of the lower frame and / or support strip.

[0007] In some embodiments, the elastic material layer is made of silicone, and its compression deformation rate is controlled within the range of 15%-30%.

[0008] In some embodiments, the multi-stage drive mechanism is a dual-stroke cylinder, which is configured such that the first stroke distance is less than the second stroke distance, and the driving force of the second stroke is greater than that of the first stroke distance.

[0009] In some embodiments, the second clamping assembly includes a vertical cylinder and several pressure plates. One end of the pressure plate is hinged to the movable end of the vertical cylinder via a connecting rod. The middle part of the pressure plate is hinged to the middle part of the composite positioning base. The other end of the pressure plate is used to clamp the upper frame. The pressure plate is in an open state at the initial position of the vertical cylinder to accommodate the upper frame.

[0010] In some embodiments, the lower positioning part and the upper positioning part are connected by a plurality of lateral positioning parts; The lower positioning part is provided with a first limiting structure that matches the contour of the inner groove of the lower frame; The lateral positioning part is provided with a groove structure that is adapted to the support bar; The upper positioning part is provided with a second limiting structure that matches the contour of the inner groove of the upper frame.

[0011] In some embodiments, the lateral positioning part is a detachable structure for adapting to support bars of different sizes.

[0012] Compared with the prior art, the present invention has at least the following beneficial effects: A zoned and hierarchical positioning system is constructed to enable the three types of workpieces—lower frame, support strip, and upper frame—to complete their initial positioning within independent positioning domains, thereby avoiding the transmission of errors during the clamping process. The multi-stage drive mechanism, in conjunction with the elastic clamping component, forms a gradient clamping control. The first stroke adopts a low-stiffness clamping mode, which allows the elastic material layer to absorb the local deformation of the base and avoid stress concentration caused by forced correction. The second stroke switches to a high-stiffness clamping mode to ensure that the multiple support bars maintain zero relative displacement at the moment of welding. This effectively matches the structural stability requirements of different assembly stages.

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0014] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of a lamp frame welding fixture provided in an embodiment of this application.

[0016] Figure 2 This is a schematic diagram of the structure of a composite positioning base in a lamp frame welding fixture provided in an embodiment of this application.

[0017] Figure 3 This is a schematic diagram of the structure of a lamp frame welding fixture provided in an embodiment of this application after the composite positioning base is hidden.

[0018] Figure 4 This is a schematic diagram of the overall structure of the lamp frame, which is placed in the lamp frame welding fixture.

[0019] Figure 5 This is a schematic diagram of the overall structure of placing the complete lamp frame into the lamp frame welding fixture.

[0020] Figure 6 This is a schematic diagram of the overall structure for removing the welded lamp frame from the lamp frame welding fixture. Detailed Implementation

[0021] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may not be directly connected to the other devices but may have an intermediary device.

[0024] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0025] Reference Figures 1 to 6 This embodiment proposes a lamp frame welding fixture, comprising: The composite positioning base 10 includes a lower positioning part 11 and an upper positioning part 12. The lower positioning part 11 is used to simultaneously accommodate the lower frame 51 of the lamp frame 50 and the lower part of multiple support bars 52, and the upper positioning part 12 is used to accommodate the upper frame 53 of the lamp frame 50. A multi-stage drive mechanism 20 is connected to the first clamping component 30 and controls its phased forward progressive movement. The first pressing component 30 is driven by the multi-stage drive mechanism 20. In the first stroke, it presses the lower frame 51 to a preset position, and in the second stroke, it presses all the support bars 52 simultaneously. The second clamping component 40 is used to clamp the upper frame 53 onto the upper positioning part 12.

[0026] It should be noted that the composite positioning base 10 includes a lower positioning part 11, an upper positioning part 12, and a lateral positioning part 13 that is laterally connected between the two. The lower positioning part 11 is provided with a first limiting structure that matches the contour of the inner groove of the lower frame 51, which is used to constrain the displacement of the lower frame 51 in the XY plane. The upper positioning part 12 is provided with a second limiting structure that matches the contour of the inner groove of the upper frame 53, which is used to constrain the displacement of the upper frame 53 in the XY plane. The lower positioning part 11 and the upper positioning part 12 are arranged coaxially to adapt to the coaxial structure of the upper and lower frames 51 of the solar lamp frame 50. The lateral positioning part 13 is provided with a groove structure that matches the support strip 52. Since the support strip 52 is a thin-walled part, it is embedded in the groove structure to achieve positioning.

[0027] Combination Figures 4 to 6For example, firstly, the lower frame 51 is placed into the first limiting structure in the lower positioning part 11. Preferably, the first limiting structure is rectangular with four slots to accommodate the lower frame 51 of the lamp frame 50. After the lower frame 51 is placed, the multi-stage drive mechanism 20 is controlled to cause the first pressing component 30 to perform a first stroke, during which the first pressing component 30 presses the lower frame 51 against the first limiting structure. Then, four support bars 52 are placed in sequence into the groove structure of the lateral positioning part 13. Furthermore, its lower part abuts against the lower frame 51, controlling the multi-stage drive mechanism 20 to cause the first pressing component 30 to perform a second stroke. During the second stroke, the first pressing component 30 simultaneously presses all the support bars 52, thereby fixing and limiting the lower frame 51 and all the support bars 52 under the action of the first pressing component 30. Finally, the upper frame 53 is placed on the second limiting structure of the upper positioning part 12, and the second pressing component 40 presses the upper frame 53 against the upper positioning part 12, completing the positioning of all components. Figure 5 As shown, the final step is welding. After welding, the entire assembly is removed, as shown. Figure 6 As shown.

[0028] Combination Figure 3 In one embodiment, an elastic pressing block 31 is provided at the end of the first pressing component 30. The elastic pressing block 31 includes a metal substrate and an elastic material layer bonded to its contact surface. The elastic material layer is used to contact the lamp frame 50 and absorb local deformation during the pressing stage of the lower frame 51 and / or support bar 52. When the elastic pressing block 31 presses the lower frame 51 or support bar 52, the elastic material layer undergoes compression deformation, absorbing the dimensional deviation caused by the local deformation of the workpiece.

[0029] Preferably, the elastic material layer is made of silicone, and more preferably, silicone with a Shore hardness of 60A is used. Its compression deformation rate is controlled within the range of 15%-30%. When there are local protrusions of less than 0.5mm on the workpiece, the elastic layer can completely absorb the deformation without generating a rebound force.

[0030] Preferably, the multi-stage drive mechanism 20 is a double-stroke cylinder 21, which is configured such that the first stroke distance is less than the second stroke distance, and the driving force of the second stroke is greater than that of the first stroke distance.

[0031] For example, the first stroke distance is set to 8-12mm (corresponding to pressing the lower frame 51), and the second stroke distance is set to 15-20mm (corresponding to pressing the support bar 52). The output driving force of the second stroke is 1.5-2 times that of the first stroke, so as to ensure that the lower frame 51 and the support bar 52 are pressed synchronously. This achieves the avoidance of excessive constraint during the pressing stage of the lower frame 51 and ensures rigid fixation during the pressing stage of the support bar 52.

[0032] Combination Figure 3In one embodiment, the second pressing assembly 40 includes a vertical cylinder 41 and several pressure plates 42. The pressure plates 42 are L-shaped lever structures. One end of the pressure plate 42 is hinged to the movable end 44 of the vertical cylinder 41 through a connecting rod 43. The middle part of the pressure plate 42 is hinged to the middle part of the composite positioning base 10 through a pin. The other end of the pressure plate 42 is used to press and cooperate with the upper frame 53. The pressure plate 42 is in the open state at the initial position of the vertical cylinder 41 to accommodate the upper frame 53.

[0033] When the vertical cylinder 41 controls its movable end 44 to move upward, it drives the connecting rod 43 to provide an outward expanding force to one end of the pressure plate 42, and the free end of the pressure plate 42 rotates inward to the clamping position, pressing the upper frame 53. When the vertical cylinder 41 controls its movable end 44 to move downward, it drives the connecting rod 43 to provide an inward contracting force to one end of the pressure plate 42, and the free end of the pressure plate 42 rotates outward to the opening position. In the initial position, the vertical cylinder 41 is in the contracted state, and the free end of the pressure plate 42 is in the open position to accommodate the upper frame 53.

[0034] Preferably, the lower positioning part 11 and the upper positioning part 12 are connected by a plurality of lateral positioning parts 13; the lateral positioning parts 13 are detachable structures and are used to adapt to support bars 52 of different sizes.

[0035] In summary, compared with the prior art, the above embodiments have at least the following technical advantages: Through the spatial partitioning architecture of the composite positioning base 10, the positioning areas of the lower frame 51, support strip 52, and upper frame 53 form physically isolated independent positioning domains. The stress generated when the lower frame 51 is pressed is confined within the lower positioning part 11 and will not be transmitted to the support strip 52 assembly area; the reaction force generated when the support strip 52 is pressed is independently absorbed by the lateral positioning part 13, preventing disturbance to the fixed position of the lower frame 51. This spatial decoupling mechanism fundamentally blocks the error transmission chain in multi-workpiece assembly. The multi-stage drive mechanism 20, in conjunction with the elastic clamping component, forms a gradient clamping control. The first stroke adopts a low-stiffness clamping mode, which allows the elastic material layer to absorb the local deformation of the base and avoid stress concentration caused by forced correction. The second stroke switches to a high-stiffness clamping mode to ensure that the multiple support bars 52 maintain zero relative displacement at the moment of welding. This effectively matches the structural stability requirements of different assembly stages.

[0036] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A lamp frame welding fixture, characterized in that, include: A composite positioning base includes a lower positioning part and an upper positioning part. The lower positioning part is used to simultaneously accommodate the lower frame of the lamp frame and the lower parts of multiple support bars, and the upper positioning part is used to accommodate the upper frame of the lamp frame. A multi-stage drive mechanism is connected to the first clamping component and controls its phased forward movement. The first pressing component, driven by the multi-stage driving mechanism, presses the lower frame to a preset position during the first stroke and simultaneously presses all the support bars during the second stroke. The second clamping component is used to clamp the upper frame against the upper positioning part.

2. The lamp frame welding fixture as described in claim 1, characterized in that, The first clamping assembly includes an elastic clamping block, the side of which is in contact with the lamp frame is an elastic material layer, and the elastic clamping block is used to absorb local deformation during the clamping stage of the lower frame and / or support strip.

3. The lamp frame welding fixture as described in claim 2, characterized in that, The elastic material layer is made of silicone, and its compression deformation rate is controlled within the range of 15%-30%.

4. A lamp frame welding fixture as described in claim 2, characterized in that, The multi-stage drive mechanism is a dual-stroke cylinder, which is configured such that the first stroke distance is shorter than the second stroke distance, and the driving force of the second stroke is greater than that of the first stroke distance.

5. A lamp frame welding fixture as described in claim 4, characterized in that, The second clamping assembly includes a vertical cylinder and several pressure plates. One end of the pressure plate is hinged to the movable end of the vertical cylinder via a connecting rod. The middle part of the pressure plate is hinged to the middle part of the composite positioning base. The other end of the pressure plate is used to clamp the upper frame. The pressure plate is in an open state at the initial position of the vertical cylinder to accommodate the upper frame.

6. A lamp frame welding fixture as described in claim 5, characterized in that, The lower positioning part and the upper positioning part are connected by a number of lateral positioning parts; The lower positioning part is provided with a first limiting structure that matches the contour of the inner groove of the lower frame; The lateral positioning part is provided with a groove structure that is adapted to the support bar; The upper positioning part is provided with a second limiting structure that matches the contour of the inner groove of the upper frame.

7. A lamp frame welding fixture as described in claim 6, characterized in that, The lateral positioning part is a detachable structure used to adapt to support bars of different sizes.

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