A semi-automatic crimping device for a conductor shield

Abstract

The application discloses a kind of conductor shield half-automatic crimping device, it is related to high-voltage electrical equipment technical field.Welding base lower surface is fixed with the positioning base for fixing the bottom of the workpiece to be crimped, welding base extends upwards at the both sides of positioning base, one side is fixed with unloading cylinder, the other side is fixed with pressure cylinder, between unloading cylinder and pressure cylinder, there is pressure device.The conductor shield half-automatic crimping device of the application can solve various problems of existing technology full manual crimping, mainly including: realizing one-time crimping forming;Realize crimping groove uniform, ensure groove smooth transition, and prevent product discharge during operation;Prevent damage to the surface of the shield during crimping, avoid uneven surface of product, prevent uneven crimping groove of shield;Introduce semi-automatic crimping equipment to replace complex manual operation to realize staff reduction and efficiency increase.

Description

Technical Field

[0001] This invention relates to the field of high-voltage electrical equipment technology, and specifically to a semi-automatic crimping device for conductor shielding covers. Background Technology

[0002] Currently in the field of high-voltage electrical equipment technology, when crimping the shield to the conductor, a completely manual method is usually adopted. The three-part mold is used to crimp the conductor with a three-jaw chuck. During the crimping process, the operator needs to rotate the direction and repeatedly adjust the clamping position of the workpiece on the chuck. This reduces efficiency and increases human error, making it impossible to guarantee successful crimping on the first attempt.

[0003] The force is difficult to control during the crimping process, and because the manual force is insufficient to meet the crimping requirements, uneven crimping depths can occur.

[0004] Due to structural limitations, the crimping contact mold usually adopts a three-part metal mold. This "three-point" force-bearing method is prone to producing indentations at the contact points on thin-walled or low-rigidity shielding surfaces during the crimping process, resulting in unevenness on the product surface.

[0005] Existing crimping methods are inefficient because they are entirely manual. Manual crimping is not only slow, but also highly dependent on the operator's skill level, making it difficult to meet the efficiency requirements of modern production. Summary of the Invention

[0006] The purpose of this invention is: By providing a semi-automatic crimping device, various problems of the existing fully manual crimping method are solved, mainly including: achieving one-time crimping; ensuring uniform crimping grooves, smooth groove transition, and preventing product discharge during operation; preventing damage to the shielding cover surface during crimping, avoiding unevenness on the product surface, and preventing unevenness in the shielding cover crimping groove; introducing semi-automatic crimping equipment to replace complex manual operations, thereby reducing manpower and increasing efficiency.

[0007] The objective of this invention can be achieved through the following technical solutions: A semi-automatic crimping device for conductor shielding includes a welding base: The lower surface of the welding base is fixed with a positioning base for fixing the conductor to be crimped and the bottom of the shield. The welding base extends upward on both sides of the positioning base. An unloading cylinder is fixed on one side and a clamping cylinder is fixed on the other side. A clamping device for crimping the conductor and the shield is provided between the unloading cylinder and the clamping cylinder. The clamping device includes a moving mold and a fixed mold located outside the moving mold. The fixed mold has an opening on one side facing the moving mold. The fixed mold and the moving mold are slidably engaged by a mutually cooperating guide structure. The moving mold is set on the outer ring of the annular groove on the outer peripheral wall of the conductor to be crimped. The inner side of the moving mold has a circular crimping cavity that matches the size of the conductor to be crimped and the shield. A mold sleeve is provided in the crimping cavity. The inner ring of the mold sleeve has an annular boss that extends radially inward. The annular boss is adapted to the annular groove on the outer peripheral wall of the conductor to be crimped. Both the moving mold and the mold sleeve are three-lobed radially opening and closing structures with unequal divisions, consisting of three lobes: the first lobe, the second lobe, and the third lobe. The moving mold is divided into two sides. The side facing the fixed mold is divided into the second lobe and the third lobe, while the other side is the first lobe. In the closed state, the first lobe, the second lobe, and the third lobe of the moving mold circumferentially cover the outer side of the annular groove on the outer peripheral wall of the conductor to be crimped. The three lobes together form a circular through hole that matches the annular groove on the outer peripheral wall of the conductor to be crimped, so as to realize the radial crimping of the conductor to be crimped and the shield. The second and third segments of the moving mold each have a guide ramp on their radial ends. The inner wall of the fixed mold has a guide ramp that mates with the guide ramps of the second and third segments, which guides the moving mold and the fixed mold to close radially. The guide ramp of the fixed mold and the guide ramps of the second and third segments of the moving mold slide together through a mutually cooperating guide structure. The upper and lower ends of the inner wall of the fixed mold opening each have a limiting part to limit the sliding stroke of the second and third segments on the inner wall of the fixed mold. A positioning block that contacts the second and third segments of the moving mold is embedded in the center of the inner wall of the bottom wall of the fixed mold. Limiting bosses protrude outward from both sides of the end of the first segment facing away from the fixed mold. The side of the fixed mold facing away from the moving mold is connected to the unloading cylinder; the first segment of the moving mold facing away from the fixed mold is connected to the clamping cylinder.

[0008] Furthermore, the positioning base consists of a positioning base plate, a positioning seat, and a positioning sleeve. The positioning base plate is fixed on the welding base. A sliding groove is provided on the upper surface of the positioning base plate. The positioning seat is provided with a slider that cooperates with the sliding groove. The slider slides in cooperation with the sliding groove. The positioning sleeve is fixed on the positioning seat.

[0009] Furthermore, the mutually cooperating guide structure includes a guide groove disposed on the inner wall of the fixed mold and guide protrusions disposed on the guide inclined surfaces of the second and third petals and on both sides of the first petal that connect with the fixed mold. The outer contour shape of the guide protrusion is adapted to the inner contour shape of the guide groove. The guide protrusion is embedded in the guide groove and can slide along the guide direction of the guide groove.

[0010] Furthermore, the slide groove is a T-shaped groove, and the slider is a T-shaped guide that is placed in the T-shaped groove and can slide along the T-shaped groove.

[0011] Furthermore, the fixed mold is connected to the unloading cylinder via a disassembly ejector rod.

[0012] Furthermore, the positioning sleeve is made of engineering plastic, preferably nylon.

[0013] Furthermore, the mold sleeve is made of a polymer insulating material, preferably polytetrafluoroethylene.

[0014] Furthermore, the positioning block is preferably made of a polymer material, and more preferably of polytetrafluoroethylene.

[0015] Furthermore, the clamping cylinder and the unloading cylinder are controlled by an electro-hydraulic device.

[0016] The present invention has the following beneficial effects: 1. Achieve one-time pressing and forming: The pressing method used in this invention is an unequally divided three-lobed type, which can achieve one-time pressing forming. The prefabricated guide slope structure at the left end of the fixed mold can convert the horizontal axial thrust output by the pressing cylinder into the radial extrusion force of the unequally divided three-lobed moving mold that tightens inward synchronously. Relying on the mechanical flow distribution characteristics of the slope, it ensures that the workpiece to be pressed is subjected to uniform pressure throughout the entire circle, and the groove contour forming has high consistency.

[0017] 2. Ensure uniformity of the crimping grooves, guarantee a smooth transition between grooves, and prevent electrical discharge during product operation: The pressing cylinder and unloading cylinder of the present invention are controlled by an electro-hydraulic device, which can automatically set values ​​and is equipped with a force feedback device. During the pressing process, the data forms a closed loop, and the material can automatically stop when it reaches the preset stress, thereby achieving uniform pressing groove, ensuring smooth groove transition, and preventing the product from discharging during operation.

[0018] 3. Prevent damage to the shielding cover surface during the crimping process, avoid unevenness on the product surface, and prevent unevenness in the crimping grooves of the shielding cover: The moving mold is designed as a three-lobed radially opening and closing structure with unequal divisions. The matching mold sleeve is manufactured separately according to the disassembly method of the moving mold, and the two are rigidly locked together by bolts. The radial contraction and opening are achieved by relying on the segmented opening and closing method, which solves the common problems of uneven circumferential force and inconsistent depth of pressing grooves in the existing one-piece mold. The mold sleeve for pressing contact is preferably made of high-strength composite material. By calculating the relationship between material deformation and the stress on the shield, the surface of the shield is prevented from being damaged during pressing, and the pressing groove of the shield is prevented from becoming uneven.

[0019] 4. Introduce semi-automated crimping equipment to replace complex manual operations, thereby reducing manpower, increasing efficiency, and lowering costs: The fixed mold and moving mold achieve vertical sliding and limiting through a guiding structure, constraining the mold to only perform feeding movements in a specified direction, preventing vertical movement and force skew under pressure, and avoiding workpiece scrap due to excessive pressure on one side. The entire set of process parameters can be programmed and fixed, and the processing cycle and product quality fluctuation range of batch production single pieces are controllable. The positioning block is preferably made of high polymer material, which has the properties of compressive strength and resistance to repeated deformation. Compared with ordinary metal gaskets of conventional technology, it has stronger fatigue resistance, and the buffer components do not require high-frequency replacement, reducing consumable maintenance costs. Attached Figure Description

[0020] To more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a front view cross-sectional structural diagram of a semi-automatic conductor shielding crimping device according to the present invention.

[0022] Figure 2 This is a three-dimensional structural diagram of a semi-automatic conductor shielding crimping device according to the present invention in use.

[0023] Figure 3 This is a three-dimensional cross-sectional structural diagram of the semi-automatic crimping device for conductor shielding according to the present invention in use.

[0024] Figure 4 This is a partial three-dimensional structural diagram of the pressing device of a semi-automatic conductor shielding pressing device according to the present invention.

[0025] Figure 5 This is a cross-sectional structural diagram of the mold sleeve of a semi-automatic conductor shielding crimping device according to the present invention.

[0026] Figure 6 This is a cross-sectional structural diagram of the positioning base of a semi-automatic conductor shielding crimping device according to the present invention.

[0027] in: 1. Welding base; 2. Clamping cylinder; 3. Clamping device; 3-1. Moving mold; 3-2. Fixed mold; 3-3. Positioning block; 3-4. Disassembly ejector rod; 3-5. Mold sleeve; 3-6. Limiting part; 4. Unloading cylinder; 5. Positioning base; 5-1. Positioning base plate; 5-2. Positioning seat; 5-3. Positioning sleeve; 5-4. Slide groove; 5-5. Sliding block; 6. Workpiece to be pressed; 11. First lobe; 12. Second lobe; 13. Third lobe. Detailed Implementation

[0028] To further illustrate the technical means and effects adopted by the present invention to achieve its intended purpose, the specific embodiments, structures, features, and effects of the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0029] Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0030] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0032] like Figure 1 As shown, a semi-automatic crimping device for conductor shielding of the present invention includes a welding base 1, a pressing cylinder 2, a pressing device 3, an unloading cylinder 4, and a positioning base 5.

[0033] The welding base 1 of this invention serves as the base of the crimping device, connecting and supporting various components. As a unified rigid load-bearing base for the entire machine, all components of this crimping device are assembled by welding or bolting on the base. This unified assembly standard reduces structural deformation that may occur during long-term mass production and stabilizes the accuracy of long-term processing.

[0034] like Figure 2 As shown, a positioning base 5 for fixing the bottom of the workpiece 6 to be crimped is fixed on the lower surface of the welding base 1. The workpiece 6 to be crimped is the conductor and shielding cover to be crimped after being assembled. The welding base 1 extends upward on both sides of the positioning base 5. An unloading cylinder 4 is fixed on one side and a clamping cylinder 2 is fixed on the other side. A clamping device 3 is provided between the unloading cylinder 4 and the clamping cylinder 2.

[0035] like Figure 4As shown, the pressing device 3 includes a moving mold 3-1 with an outer ring of an annular groove on the outer peripheral wall of the conductor to be pressed, and a fixed mold 3-2 located outside the moving mold 3-1. The fixed mold 3-2 has an opening on one side facing the moving mold 3-1. The fixed mold 3-2 and the moving mold 3-1 are slidably engaged by a mutually cooperating guide structure. The inner side of the moving mold 3-1 has a circular pressing cavity that matches the size of the workpiece 6 to be pressed. A mold sleeve 3-5 is provided in the pressing cavity. The mold sleeve 3-5 is made of a polymer insulating material, preferably polytetrafluoroethylene.

[0036] like Figure 3 Combination Figure 5 As shown, the inner ring of the mold sleeve 3-5 is provided with an annular boss extending radially inward, and the annular boss is adapted to the annular groove on the outer peripheral wall of the workpiece 6 to be pressed.

[0037] like Figure 4 As shown, both the moving mold 3-1 and the mold sleeve 3-5 are unequally divided three-lobed radially opening and closing structures, consisting of three lobes: the first lobe 11, the second lobe 12, and the third lobe 13. Because the moving mold 3-1 has an unequally divided three-lobed structure, the mold sleeve 3-5 is also divided accordingly. The shape of each lobe of the mold sleeve 3-5 is adapted to the inner contour of each lobe of the moving mold 3-1, and the mold sleeve 3-5 is connected to the moving mold 3-1 by bolts. Here, the first lobe 11, the second lobe 12, and the third lobe 13 refer to the lobes that are connected to each lobe of the moving mold 3-1 as a single unit.

[0038] In one embodiment of the present invention, the matching mold sleeve 3-5 is processed separately with reference to the disassembly form of the moving mold 3-1, and the two are rigidly locked together as one piece by bolts; the radial contraction and opening are achieved by the segmented opening and closing form, which solves the common problems of uneven circumferential force and uneven depth of pressing groove in the existing integrated mold.

[0039] The moving mold 3-1 is divided into two sides. The side facing the fixed mold 3-2 is divided into a second petal 12 and a third petal 13, while the other side is a first petal 11. In the closed state, the first petal 11, the second petal 12, and the third petal 13 of the moving mold 3-1 circumferentially cover the outer side of the annular groove on the outer peripheral wall of the conductor to be crimped. The three petals together form a circular through hole that matches the annular groove on the outer peripheral wall of the conductor to be crimped, so as to realize the radial crimping of the conductor to be crimped and the shield. The second and third petals 12 and 13 of the moving mold 3-1 each have a guide slope on their radial ends. The inner wall of the fixed mold 3-2 has a guide slope that matches the guide slopes of the second and third petals 12 and 13, which is used to guide the radial closing of the moving mold 3-1 and the fixed mold 3-2. The guide slope of the fixed mold 3-2 and the guide slopes of the second and third petals 12 and 13 of the moving mold 3-1 are slidably engaged by the mutually cooperating guide structure.

[0040] like Figure 4 As shown, the mutually cooperating guide structure includes a guide groove on the inner wall of the fixed mold 3-2 and guide bosses on the guide inclined surfaces of the second petal 12 and the third petal 13, and on both sides of the first petal 11 that connects with the fixed mold 3-2. The outer contour shape of the guide bosses matches the inner contour shape of the guide grooves. The guide bosses are embedded in the guide grooves and can slide along the guiding direction of the guide grooves. Limiting portions 3-6 are provided at the upper and lower ends of the inner wall of the opening of the fixed mold 3-2 to limit the sliding stroke of the second petal 12 and the third petal 13 on the inner wall of the fixed mold 3-2. Limiting bosses protrude outwards from both sides of the end of the first petal 11 facing away from the fixed mold 3-2.

[0041] like Figure 4 As shown, a positioning block 3-3 is embedded in the center of the inner wall of the bottom wall of the fixed mold 3-2, which contacts the second lobe 12 and the third lobe 13 of the moving mold 3-1. The positioning block 3-3 is preferably made of a polymer material, preferably polytetrafluoroethylene (PTFE). Polymer materials possess resistance to pressure and repeated deformation, exhibiting stronger fatigue resistance compared to ordinary metal gaskets. This eliminates the need for frequent replacement of buffer components, reducing consumable maintenance costs. By arranging the polymer positioning block 3-3 at this pressure-bearing contact position, the invention absorbs the reverse impact force generated by the rebound of the shielding material under pressure, disperses the impact load generated by the hard contact of various metal components, prevents the moving and fixed molds from jamming, and avoids chipping and breakage of the working surfaces, thereby reducing downtime and extending service life. Similar crimping fixtures on the market without buffer design have metal molds that directly impact each other with pressure. The reverse impact force generated by the rebound of the workpiece material under pressure will directly act on the mating surfaces of the moving and fixed molds, causing them to be subjected to repeated stress over a long period of time. As a result, the molds are prone to jamming and sticking, and the working surfaces may chip or break, requiring frequent shutdowns for disassembly and maintenance.

[0042] like Figure 2 Combination Figure 3 As shown, the side of the fixed mold 3-2 facing away from the moving mold 3-1 is connected to the unloading cylinder 4; the first segment 11 of the moving mold 3-1 facing away from the fixed mold 3-2 is connected to the clamping cylinder 2. Preferably, the fixed mold 3-2 is connected to the unloading cylinder 4 via a disassembly ejector rod 3-4. The clamping cylinder 2 and the unloading cylinder 4 are controlled by an electro-hydraulic device. Values ​​can be automatically set, and a force feedback device is provided. During the pressing process, data forms a closed loop, and the process automatically stops when the material reaches the preset stress, thereby achieving uniform pressing grooves, ensuring smooth groove transitions, and preventing product discharge during operation.

[0043] The positioning base 5 of this invention is a finely adjustable workpiece positioning base module. For example... Figure 6As shown, the positioning base 5 consists of a positioning base plate 5-1, a positioning seat 5-2, and a positioning sleeve 5-3. The positioning base plate 5-1 is fixed to the welding base 1. A sliding groove 5-4 is provided on the upper surface of the positioning base plate 5-1. The positioning seat 5-2 is provided with a slider 5-5 that cooperates with the sliding groove 5-4. The slider 5-5 slides in conjunction with the sliding groove 5-4. The positioning sleeve 5-3 is fixed to the positioning seat 5-2. The sliding groove 5-4 is a T-shaped groove, and the slider 5-5 is a T-shaped guide that is placed in the T-shaped groove and can slide along the T-shaped groove.

[0044] The slider 5-5 and the groove 5-4 allow the positioning seat 5-2 to slide freely laterally for fine-tuning of the workstation position. This eliminates the need to disassemble the entire base frame, enabling it to accommodate multiple workpieces with similar specifications for crimping, thus reducing the cost of modifying and customizing new tooling. This invention, by incorporating the groove and slider, allows the positioning seat 5-2 to slide, thereby broadening the compatibility range of the tooling and reducing costs while increasing efficiency. Because conventional shielding cover crimping tooling often uses a fixed welded assembly for workpiece positioning, even minor changes in the product's outer diameter or installation position require complete disassembly and customization of the entire positioning tooling, resulting in high mold modification costs and long adjustment cycles. In contrast, the positioning seat 5-2 of this invention can slide for fine-tuning, eliminating the need for complete disassembly of the base frame; simply loosening the bolts allows for adjustment of the workpiece position.

[0045] In one embodiment of the present invention, the slide groove 5-4 is a T-shaped groove, and the slider 5-5 is a T-shaped guide placed in the T-shaped groove and sliding along the T-shaped groove. The T-shaped guide can be a common part such as a T-bolt. To ensure stability, there is one slide groove 5-4 on each side of the positioning base plate 5-1, and correspondingly, at least two T-shaped guides are provided on each side. Slide grooves of other shapes can also achieve this function.

[0046] The positioning sleeve 5-3 is made of engineering plastic, preferably nylon, and is made of wear-resistant and elastic nylon material. Existing technologies generally use metal positioning sleeves. However, during workpiece loading, unloading, and pressure bonding, the hard metal contact surface of traditional metal positioning sleeves easily scratches the paint and plating of the outer wall of the shielding cover, resulting in surface defects. Nylon, on the other hand, is more flexible and can prevent hard scratches on the plating and paint surface during workpiece loading and unloading. Nylon positioning sleeves also have wear-resistant and self-lubricating properties, so even with repeated workpiece insertion and removal, the positioning holes are less prone to wear, resulting in minimal attenuation of positioning accuracy over long-term mass production and reducing the frequency of tooling periodic calibration. Surface scratches caused by workpiece clamping are controlled, reducing workpiece appearance defects and improving the pass rate of the conductor and shielding cover crimped products. Precise workpiece placement prevents one-sided crimping failures due to workpiece misalignment.

[0047] In one embodiment of the present invention, the bottom of the positioning sleeve 5-3 is inserted into the positioning seat 5-2. For different workpieces to be pressed with similar sizes, the positioning sleeve 5-3 can be replaced according to the different outer diameters of the workpieces to be pressed. The inner contour of the positioning sleeve 5-3 is adapted to the shape of the workpiece to be pressed, and different workpieces to be pressed are adapted to different inner contours, so that multiple workpieces to be pressed with similar sizes can share a set of main tooling. The inner contour of the positioning sleeve 5-3 is adapted to the shape of the workpiece to be pressed, which can also limit the lateral displacement of the workpiece and avoid local pressing misalignment caused by workpiece skewing. This can reduce the investment in tooling procurement and modification for new product production; shorten the time for product changeover and debugging; flexibly adapt to multi-specification small batch orders; and enhance the overall reusability of tooling.

[0048] In one embodiment of the present invention, the positioning sleeve 5-3 and the positioning seat 5-2 are assembled. The height of the sleeve is precisely matched with the pressing position of the shielding cover groove, and its height setting is exactly in line with the pressing position of the shielding cover groove, thus completing the vertical locking and limiting of the workpiece.

[0049] The working process and principle of this invention: Standardized closed-loop process flow: First, the workpiece to be crimped is pre-loaded into the crimping device of the present invention from top to bottom and positioned; the pressing cylinder pushes the moving mold to advance towards the inside of the fixed mold and radially crimps the workpiece; pressure is maintained and released according to the preset pressure duration; the unloading cylinder reverses to open the moving mold and removes the workpiece.

[0050] Specifically, such as Figure 2 Combination Figure 3 As shown, during the installation process, the product to be pressed, i.e. the workpiece 6 to be pressed, i.e. the conductor and shielding cover after being assembled, is placed upwards and passed through the center hole of the moving mold 3-1. Then the product is inserted into the positioning sleeve 5-3 so that the bottom fits, and the position is completed.

[0051] like Figure 2 As shown, during the pressing process, the pressing cylinder 2 pushes the moving mold 3-1 towards the fixed mold 3-2. The moving mold 3-1 and the fixed mold 3-2 are slidably engaged by a guide structure that restricts their vertical movement. A sloping end is provided at the left end of the fixed mold 3-2. Under the force of the pressing cylinder 2, the moving mold 3-1 moves to the left and tightens inward under the action of the sloping end, thus extruding the mold and forming a uniform groove according to the shape of the mold. During the extrusion process, because the positioning block 3-3 is made of high-polymer material, it generates a counter-force due to the extrusion, effectively preventing the fixed mold 3-2 and the moving mold 3-1 from jamming. After reaching the set pressure, the pressing cylinder 2 stops and maintains the pressure for a certain period, such as 1 minute, before releasing the pressure and returning to its initial position.

[0052] The existing technology of traditional integrated closed-loop crimping molds, which use three equal parts of metal molds to crimp with a three-jaw chuck, is prone to deviations in the force at different points on the inner circumference of the mold during crimping. This can easily cause indentations at the contact points on thin-walled or low-rigidity shielding surfaces during the crimping process. As a result, the crimped shielding will have defects such as uneven groove depth and local indentations exceeding tolerance.

[0053] The crimping device of this invention utilizes the guide slopes of the fixed and moving molds for mechanical transformation. This transforms the horizontal axial thrust output from the clamping cylinder into a radial extrusion force from three unequally divided moving molds that synchronously converge inwards. Leveraging the mechanical diversion characteristics of the slopes, the three petals tighten synchronously inwards, significantly reducing the deviation in extrusion force along the workpiece's circumference. Rigid outer limits are provided by matching mold sleeves that fit each moving mold petal, constraining the pressing stroke at each position. This ensures uniform pressure across the entire circumference of the workpiece to be crimped, resulting in high consistency in the groove contour. The crimped workpiece exhibits higher dimensional accuracy and stronger product consistency. During batch processing, fluctuations in the groove depth and contour dimensions of the shielding cover are reduced, improving the yield rate. This meets the precision requirements for crimping tolerances in precision shielding components and is suitable for mass production of electrical shielding parts with stringent requirements for appearance and sealing accuracy.

[0054] Some existing simple pressing fixtures rely on a single hydraulic cylinder to complete pressing and demolding. The expansion range of the mold rebound is uncontrollable. During demolding, the mold body is prone to scraping and pressing the grooved parts, causing workpiece deformation and groove scratches.

[0055] The pressing device of this invention does not damage the workpiece during demolding and has stronger automation adaptability: the fixed mold 3-2 and the moving mold 3-1 achieve vertical sliding limit through the slide groove 5-4 and the slider 5-5, constraining the fixed mold 3-2 and the moving mold 3-1 to only perform feeding actions in a specified direction, preventing vertical movement and force skew of the fixed mold 3-2 and the moving mold 3-1 under pressure, and avoiding workpiece scrap due to excessive pressing tolerance on one side. This reduces the problems of workpiece deformation and groove scratches during demolding; the standardized and programmable action can be connected to automated loading and unloading mechanisms, adapting to automated production line mass production, and improving the stability of single-piece processing.

[0056] The crimping device of the present invention is equipped with two independent hydraulic cylinders, namely the pressing cylinder 2 and the unloading cylinder 4, which are controlled by an electro-hydraulic device. The two cylinders are driven independently in separate processes, and the whole machine is divided into two independent hydraulic execution units.

[0057] The clamping cylinder 2 is dedicated to completing the feeding, pressure stabilization, and pressure holding forming processes. After the clamping cylinder 2 reaches the preset pressure threshold, a timed pressure holding process is set to be executed, such as holding the pressure for 1 minute, so that the metal material in the pressure area of ​​the shielding cover can complete the stress relaxation, eliminate the residual stress inside the workpiece, and significantly reduce the springback of the finished product after pressure relief, avoiding problems such as shrinkage of the groove size, mismatch of subsequent assembly tolerances, and sealing failure when the finished product is stored for a long time.

[0058] The unloading cylinder 4 is independently responsible for the demolding and opening action, outputting a reverse thrust to controllably and slightly open the three-lobed moving mold, allowing the moving mold 3-2 to smoothly disengage from the groove formed on the workpiece without causing scratch damage to the workpiece's forming structure. After the pressing work is completed, the unloading cylinder 4's reverse thrust loosens the moving mold 3-1, achieving the disassembly action. The disassembly ejector 3-4, in conjunction with the unequally divided three-lobed radially opening and closing moving mold 3-1, creates a linkage layout, causing the second lobe 12 and the third lobe 13 of the moving mold 3-1, which are closer to the fixed mold 3-2, to slightly separate and then return to their original position, allowing the product to be easily removed. When the unloading cylinder 4 applies force, it relies on the disassembly ejector 3-4 to precisely apply the opening force to each lobe of the moving mold 3-1, controlling its opening stroke range to avoid over-opening and structural misalignment. Because the unloading cylinder 4 outputs a controllable counter-thrust force, it only slightly opens each petal of the moving mold 3-1 to achieve demolding. When the mold forming working surface is separated from the workpiece pressing groove, there is no scraping or friction, which prevents the forming groove from being scratched and the shield from being deformed and scrapped due to pressure.

[0059] The driving forces of the clamping cylinder 2 and the unloading cylinder 4 operate independently. The entire clamping, pressure holding, and demolding action logic can be integrated into an electronic control program for automated closed-loop control, achieving automatic start and stop of the entire process and adapting to automated mass production lines. The parameters of the entire process can be programmed and fixed, ensuring a stable processing rhythm for individual pieces in batch production and controllable fluctuations in product quality.

[0060] It should be noted that the order of the above embodiments of the present invention is merely for descriptive purposes and does not represent the superiority or inferiority of the embodiments. The processes depicted in the accompanying drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0061] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0062] Although the invention is described and illustrated herein by way of one or more particular configurations, it is not intended to limit the details described, as various modifications and structural changes may be made within the scope of the patent claims without departing from the spirit of the invention.

[0063] The present invention relates to parts that are the same as or can be implemented using existing technologies.

Claims

1. A semi-automatic crimping device for conductor shielding, comprising a welding base (1), characterized in that: The lower surface of the welding base (1) is fixed with a positioning base (5) for fixing the conductor to be crimped and the bottom of the shield. The welding base (1) extends upward on both sides of the positioning base (5). An unloading cylinder (4) is fixed on one side and a clamping cylinder (2) is fixed on the other side. A clamping device (3) for crimping the conductor and the shield is provided between the unloading cylinder (4) and the clamping cylinder (2). The clamping device (3) includes a moving mold (3-1) and a fixed mold (3-2) located outside the moving mold (3-1). The fixed mold (3-2) has an opening on one side facing the moving mold (3-1). The fixed mold (3-2) and the moving mold (3-1) are slidably engaged by a mutually cooperating guide structure. The moving mold (3-1) is set on the outer ring of the annular groove on the outer peripheral wall of the conductor to be crimped. The inner side of the moving mold (3-1) has a circular crimping cavity that matches the dimensions of the conductor to be crimped and the shield. A mold sleeve (3-5) is provided inside the crimping cavity. The inner ring of the mold sleeve (3-5) has an annular boss extending radially inward. The annular boss is adapted to the annular groove on the outer peripheral wall of the conductor to be crimped. Both the moving mold (3-1) and the mold sleeve (3-5) are unequally divided three-lobed radially opening and closing structures, consisting of three lobes: the first lobe (11), the second lobe (12), and the third lobe (13). The third petal (13); the moving mold (3-1) is divided into two sides, with the side facing the fixed mold (3-2) divided into the second petal (12) and the third petal (13), and the other side being the first petal (11); in the closed state, the first petal (11), the second petal (12) and the third petal (13) of the moving mold (3-1) are circumferentially covered on the outside of the annular groove on the outer peripheral wall of the conductor to be crimped, and the three petals together form a circular through hole that matches the annular groove on the outer peripheral wall of the conductor to be crimped, so as to realize the radial crimping of the conductor to be crimped and the shielding cover; The second and third petals (13) of the moving mold (3-1) each have a guide slope on their radial ends. The inner wall of the fixed mold (3-2) has a guide slope that matches the guide slopes of the second and third petals (12) and is used to guide the radial closing of the moving mold (3-1) and the fixed mold (3-2). The guide slope of the fixed mold (3-2) and the guide slopes of the second and third petals (13) of the moving mold (3-1) are connected by a mutually cooperating guide structure. The structure is slidingly fitted. At the upper and lower ends of the inner wall of the opening of the fixed mold (3-2), there are limiting parts (3-6) to limit the sliding stroke of the second petal (12) and the third petal (13) on the inner wall of the fixed mold (3-2). At the center of the inner wall of the bottom wall of the fixed mold (3-2), there is a positioning block (3-3) that contacts the second petal (12) and the third petal (13) of the moving mold (3-1). On both sides of the end of the first petal (11) facing away from the fixed mold (3-2), there are limiting bosses protruding outwards respectively. The side of the fixed mold (3-2) facing away from the moving mold (3-1) is connected to the unloading cylinder (4); the first petal (11) of the moving mold (3-1) facing away from the fixed mold (3-2) is connected to the clamping cylinder (2).

2. The semi-automatic crimping device for a conductor shield according to claim 1, characterized in that... The positioning base (5) consists of a positioning base plate (5-1), a positioning seat (5-2), and a positioning sleeve (5-3). The positioning base plate (5-1) is fixed on the welding base (1). A sliding groove (5-4) is provided on the upper surface of the positioning base plate (5-1). The positioning seat (5-2) is provided with a slider (5-5) that cooperates with the sliding groove (5-4). The slider (5-5) slides with the sliding groove (5-4). The positioning sleeve (5-3) is fixed on the positioning seat (5-2).

3. The semi-automatic crimping device for a conductor shield according to claim 1, characterized in that... The mutually cooperating guide structure includes a guide groove provided on the inner wall of the fixed mold (3-2) and guide bosses provided on the guide inclined surfaces of the second petal (12) and the third petal (13), and on both sides where the first petal (11) connects with the fixed mold (3-2). The outer contour shape of the guide boss is adapted to the inner contour shape of the guide groove. The guide boss is embedded in the guide groove and can slide along the guide direction of the guide groove.

4. The semi-automatic crimping device for a conductor shield according to claim 2, characterized in that... The slide groove (5-4) is a T-shaped groove, and the slider (5-5) is a T-shaped guide that is placed in the T-shaped groove and can slide along the T-shaped groove.

5. A semi-automatic crimping device for a conductor shield according to claim 1, characterized in that... The fixed mold (3-2) is connected to the unloading cylinder (4) via the disassembly push rod (3-4).

6. The semi-automatic crimping device for a conductor shield according to claim 2, characterized in that... The positioning sleeve (5-3) is made of engineering plastic.

7. A semi-automatic crimping device for a conductor shield according to claim 1, characterized in that... The mold (3-5) is made of polymer insulating material.

8. A semi-automatic crimping device for a conductor shield according to claim 1, characterized in that... The positioning block (3-3) is made of polymer material.

9. A semi-automatic crimping device for a conductor shield according to claim 1, characterized in that... The clamping cylinder (2) and the unloading cylinder (4) are controlled by an electro-hydraulic device.

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