An inner thread extrusion forming device for a profiled stamping

Abstract

The utility model relates to internal thread extrusion forming technical field, concretely relates to a special-shaped stamping part internal thread extrusion forming equipment. It includes thread machine, is equipped with work table in the thread machine, is equipped with a plurality of chutes in the work table, the inside sliding connection of work table chute has the sliding block, the top fixed connection of sliding block has the clamp, the recess is equipped with in the clamp end, the recess end of clamp is equipped with the deformation part. Through the arc structure of the two ends of the recess inner wall of the clamp, when the soft plate deforms with the surface shape of the stamping part, the soft plate is supported, the stress produced in the soft plate bending process is relieved, the soft plate is damaged due to local excessive deformation is avoided, the stamping part is formed physical spacing to the recess of clamp, the adhesion of the deformation part soft plate and the stamping part is combined, the adhesion friction of the workpiece and the clamp is improved, the workpiece is avoided to appear to slip dislocation or processing displacement, the position degree and the tooth type precision of internal thread processing are guaranteed, and the scrap rate is reduced.

Description

Technical Field

[0001] This utility model relates to the field of internal thread extrusion forming technology, specifically, to a device for internal thread extrusion forming of irregularly shaped stamped parts. Background Technology

[0002] Existing internal thread extrusion forming equipment for stamped parts is a type of specialized processing equipment based on the principle of metal plastic deformation. It is mainly used for chipless threading of pre-drilled holes in stamped metal workpieces. Its core mechanism uses a servo-driven extrusion spindle to rotate and feed the extrusion tap, forcing the workpiece hole wall material to flow along the tap's tooth profile to form an internal thread. Compared to traditional cutting and tapping, this significantly improves thread strength and material utilization. The equipment typically consists of a feeding mechanism, a positioning and clamping system, an extrusion execution unit, a transmission system, and a control system. It is adaptable to the batch processing of regular-shaped (such as round and square) stamped parts and has already achieved large-scale application in industries such as automotive, home appliances, and hardware.

[0003] However, for irregularly shaped stamped parts (such as workpieces with asymmetrical bosses, irregular cross-sections, and curved contours), due to the lack of a uniform and regular positioning reference surface, existing fixtures are unable to form a stable contact point with the workpiece surface. During clamping, problems such as local contact and uneven force are prone to occur. When the equipment starts the extrusion process, the axial pressure and rotational torque applied by the tap can easily break through the friction constraint of the fixture, causing the workpiece to slip and misalign, which in turn leads to processing displacement problems, affecting the processing qualification rate and production stability.

[0004] To address this, we propose a device for extruding internal threads into irregularly shaped stamped parts. Utility Model Content

[0005] This utility model provides a device for extruding internal threads of irregularly shaped stamped parts. A motor-driven screw moves a slider unidirectionally along a worktable groove, thereby bringing the fixture and deformable part closer to the irregularly shaped stamped part. The deformable part can adaptively deform and fit the irregular surface shape of the stamped part to form a stable force point. The fixture groove simultaneously clamps and limits the stamped part, preventing localized contact and uneven force distribution during clamping, and making it less prone to exceeding frictional constraints during extrusion processing. This solves the problems mentioned in the background art, namely: Due to their irregular shape, irregularly shaped stamped parts are difficult to find suitable gripping points with existing fixtures. When stamping, slippage and misalignment are prone to occur, causing the workpiece to shift during processing, which affects the processing qualification rate and production stability.

[0006] To achieve the above objectives, this utility model provides the following technical solution: An extrusion forming device for internal threads of irregular stamping parts includes a threading machine. The threading machine has a worktable inside, and the worktable has multiple grooves inside. A slider is slidably connected inside the grooves of the worktable. A clamp is fixedly connected to the top of the slider. A groove is provided at the end of the clamp. A deformable part is provided at the end of the groove of the clamp. The deformable part is used to contact and clamp the surface of the stamped part. The deformable part can change and match the shape of the stamped part surface. It deforms inside the groove of the clamp. The slider is used to drive the clamp and the deformable part to approach the stamped part for clamping.

[0007] Preferably, the slider has a cross-shaped structure and a circular block inside. The cross-shaped structure of the slider can be engaged inside the worktable groove to ensure unidirectional movement of the fixture.

[0008] Preferably, the deformable component includes a spring, which is fixedly connected to the bottom of the clamp groove, and a flexible plate is fixedly connected to the end of the spring, which is located at the end of the clamp groove.

[0009] Preferably, the flexible plate is made of silicone, which has the ability to stretch and deform, and can also reduce contact friction. When the flexible plate is pressed and contacted by the surface of the stamped part, it can adapt to deform and fit the surface shape of the stamped part.

[0010] Preferably, the inner wall of the clamp groove is provided with arcs at both ends. The arcs of the clamp can provide support for the flexible plate during deformation and relieve the bending pressure of the flexible plate. The flexible plate can deform and be recessed into the clamp groove. The clamp groove can clamp and limit the stamping part.

[0011] Preferably, the circular block of the slider is internally threaded with a screw, the screw is located inside the slide groove of the worktable, and a motor is provided at the end of the screw.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. In a special-shaped stamping part internal thread extrusion forming equipment, the arc structure at both ends of the inner wall of the fixture groove provides support for the soft plate when it deforms with the surface shape of the stamping part, relieving the stress generated during the bending process of the soft plate and preventing the soft plate from being damaged due to excessive local deformation; at the same time, the fixture groove forms a physical limit on the stamping part, and combined with the fit between the deformed soft plate and the stamping part, it increases the frictional force between the workpiece and the fixture, which can effectively resist the axial pressure and rotational torque applied by the tap during extrusion processing, prevent the workpiece from slipping or misaligning or shifting during processing, ensure the positional accuracy and tooth profile accuracy of the internal thread processing, and reduce the scrap rate.

[0013] 2. In a special-shaped stamping part internal thread extrusion forming equipment, a motor drives the screw to rotate, causing the slider to move unidirectionally along the worktable slide groove, thereby bringing the top-fixed clamp and deformed part closer to the special-shaped stamping part; through the cross structure of the slider and the worktable slide groove precisely engaged, combined with the transmission action of the screw, it is ensured that the clamp and deformed part always maintain a precise unidirectional trajectory when moving, avoiding clamping position deviation; through the spring in the deformed part providing flexible pressure, the silicone soft plate is pushed to adaptively deform and fit the irregular surface of the stamping part, so that the clamping force is evenly distributed on the surface of the stamping part, effectively solving the problem that existing clamps are difficult to find a stable force point due to the irregular shape of the special-shaped part, and realizing stable clamping of special-shaped parts with different shapes. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the workbench structure of this utility model; Figure 3 This is a schematic diagram of the clamping structure of this utility model; Figure 4 This is a schematic diagram of the clamp structure of this utility model; Figure 5 This is a schematic diagram of the modified clamping structure of this utility model.

[0015] The components represented by each number in the attached diagram are listed below: 1. Threading machine; 11. Worktable; 12. Screw; 13. Motor; 14. Slider; 15. Fixture; 16. Deformable part; 160. Flexible plate; 161. Spring. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0017] Please see Figure 1 - Figure 5 The diagram shows a special-shaped stamping part internal thread extrusion forming equipment, including a thread machine 1. The thread machine 1 has a worktable 11 inside, and the worktable 11 has multiple slide grooves inside. A slider 14 is slidably connected inside the slide groove of the worktable 11. A clamp 15 is fixedly connected to the top of the slider 14. The end of the clamp 15 has a groove, and the end of the groove of the clamp 15 has a deformable part 16. The deformable part 16 is used to contact and clamp the surface of the stamped part. The deformable part 16 can change and match the shape of the surface of the stamped part. It deforms inside the groove of the clamp 15. The slider 14 is used to drive the clamp 15 and the deformable part 16 to approach the stamped part for clamping.

[0018] The equipment uses a threading machine 1 as the overall processing carrier. The worktable 11 inside the threading machine 1 provides a stable bearing base for clamping and processing irregularly shaped stamped parts. Multiple pre-set slides inside the worktable 11 provide guide tracks for the movement of the slider 14, ensuring that the slider 14 can only slide in one direction along the slide direction. During operation, the slider 14 moves smoothly along the slide of the worktable 11 under the action of the transmission mechanism. Since the top of the slider 14 is fixedly connected to the clamp 15, the movement of the slider 14 will synchronously drive the clamp 15 to move closer to the irregularly shaped stamped part to be processed.

[0019] As the clamp 15 gradually approaches the irregular stamping part, the deformable part 16 at the end of the clamp 15 will preferentially contact the surface of the stamping part. As the clamp 15 continues to approach, the deformable part 16 will adaptively deform according to the irregular surface shape of the irregular stamping part. At the same time, the groove at the end of the clamp 15 will physically limit the stamping part. Finally, through the fit and clamping of the deformable part 16 and the limiting cooperation of the groove, the irregular stamping part is stably fixed.

[0020] For details, please refer to Figure 4 As shown, the slider 14 has a cross structure and a circular block inside. The cross structure of the slider 14 can be engaged inside the slide groove of the worktable 11 to ensure the unidirectional movement of the fixture 15.

[0021] Because the pre-set groove inside the worktable 11 is designed according to the size and shape of the cross structure of the slider 14, it forms a suitable guide track. During operation, each side of the cross structure can precisely fit with the inner wall of the groove, effectively limiting the displacement direction of the slider 14 inside the groove, allowing the slider 14 to move only along the extension direction of the groove. Since the top of the slider 14 is fixedly connected to the clamp 15, when the slider 14 slides unidirectionally along the groove under the drive of the transmission mechanism, the snap-fit ​​between the cross structure of the slider 14 and the groove will constrain the movement trajectory of the slider 14, preventing the slider 14 from deviating or shaking. This, in turn, drives the clamp 15 at the top to maintain a unidirectional and stable movement state, ensuring that the clamp 15 always moves precisely in the preset direction when approaching or moving away from the irregular stamping part, avoiding the clamping misalignment problem caused by the movement deviation of the clamp 15.

[0022] Furthermore, considering the structural details shown in the diagram and the processing requirements of the equipment, the slide of the worktable 11 adopts a fully hollow design, which not only provides movement space for the slider 14, but also provides a channel for subsequent debris cleaning and lubricant discharge. Corresponding to this hollow design, the equipment is also equipped with a targeted automatic spraying device above the worktable 11. After the internal thread extrusion forming process of the irregular stamped part is completed, the control system will automatically trigger the spraying device to start, spraying cleaning coolant to flush away the metal debris generated during the extrusion process. At this time, since the slide is fully hollow, the flushed debris will fall directly down to the bottom of the worktable 11 along the hollow channel of the slide, avoiding debris blockage of the slide and causing the slider 14 to move and get stuck.

[0023] See Figure 5 As shown, the deformable part 16 includes a spring 161, which is fixedly connected to the bottom of the groove of the clamp 15. A flexible plate 160 is fixedly connected to the end of the spring 161, and the flexible plate 160 is located at the end of the groove of the clamp 15.

[0024] The flexible sheet 160 is made of silicone, which has the ability to stretch and deform while reducing contact friction. When the flexible sheet 160 is pressed against the surface of the stamped part, it can adapt to the shape of the stamped part. The inner walls of the groove of the clamp 15 are rounded at both ends. The rounded ends of the clamp 15 can provide support for the flexible sheet 160 during deformation and reduce the bending pressure of the flexible sheet 160. The flexible sheet 160 can deform and be recessed into the groove of the clamp 15, which can clamp and limit the stamped part.

[0025] When the equipment clamps the irregularly shaped stamped part, as the slider 14 moves the clamp 15 closer to the part to be processed, the flexible plate 160, fixed to the end of the spring 161 and located at the outermost end of the groove in the clamp 15, will preferentially contact the surface of the irregularly shaped stamped part. As the clamp 15 continues to move towards the stamped part under the drive of the slider 14, the stamped part will exert a reverse compressive force on the flexible plate 160. Since the flexible plate 160 is fixedly connected to the spring 161, and the other end of the spring 161 is fixed in the groove of the clamp 15, this compressive force will be transmitted to the spring 161, causing the spring 161 to compress and deform along the depth direction of the groove in the clamp 15. During the compression process of the spring 161, it will generate a reverse flexible elastic force, which will continue to act on the flexible plate 160, pushing the flexible plate 160 to fit tightly against the irregular surface of the irregularly shaped stamped part.

[0026] Because silicone material itself has excellent extensibility and deformation ability, under the extrusion of irregular surfaces of stamped parts, it can adapt to the surface contour and extend or recess, closely adhering to the surface of the stamped parts; at the same time, silicone material can also reduce the contact friction with the surface of the stamped parts, preventing the surface of the stamped parts from being scratched due to excessive friction during clamping, or causing slippage in subsequent processing due to insufficient friction.

[0027] As the clamp 15 continues to approach, the flexible plate 160 is squeezed and deformed into the groove of the clamp 15. At this time, the arc surfaces at both ends of the inner wall of the groove of the clamp 15 can form smooth contact with the edge of the deforming flexible plate 160, providing support for the flexible plate 160 and preventing the flexible plate 160 from bending and breaking due to concentrated force on the edge during the concavation process, thus extending the service life of the flexible plate 160. At the same time, the groove of the clamp 15 itself will form a physical enclosure for the stamped part. When the flexible plate 160 tightly fits the stamped part in the groove, the limiting effect of the groove can restrict the displacement of the stamped part in the horizontal or vertical direction. With the close clamping of the flexible plate 160, the fixing stability of the stamped part is further improved.

[0028] In addition, see Figure 3 As shown, the internal thread of the circular block of slider 14 is connected to a screw 12, which is located inside the slide groove of the worktable 11. A motor 13 is provided at the end of the screw 12.

[0029] During operation, motor 13 is started first, and the rotational power output by motor 13 is directly transmitted to the connected screw 12, causing screw 12 to rotate stably around its own axis inside the preset groove of worktable 11. Since the circular block of slider 14 has an internal thread that matches the external thread of screw 12, and slider 14 is engaged with the groove of worktable 11 through a cross structure, when screw 12 rotates, slider 14 will move along the groove towards the irregular stamping part, providing power and direction assurance for the stable clamping between fixture 15 and deformed part 16.

[0030] In addition, to prevent the cleaning fluid or debris from the spray device from interfering with the motor, the equipment is equipped with a protective shell (not shown in the figure) on the outside of the motor. The protective shell is a closed structure adapted to the shape of the motor. The material is engineering plastic or stainless steel that is resistant to coolant corrosion and has a certain impact resistance. It can isolate the cleaning fluid and metal debris splashed during the spraying process from the outside, and at the same time prevent dust and other debris from entering the motor.

[0031] Meanwhile, considering that the threaded mating surface of the screw 12 is prone to wear due to friction during long-term operation, or that the wear is aggravated by residual debris, the equipment is also equipped with a regular screw 12 lubrication operation mechanism in the processing flow. The lubrication system is maintained manually, and the condition of the screw 12 can be directly observed through the hollow slide groove of the worktable 11. A special tool is used to evenly apply the lubricant to the thread contact area, so that a wear-resistant protective film is formed on the threaded mating surface, which greatly reduces the frictional resistance in the transmission process and avoids failures such as screw 12 thread wear and slide stripping of the internal thread of the slider 14 caused by dry friction.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements, but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A special-shaped stamping part internal thread extrusion forming equipment, comprising a threading machine (1), wherein the threading machine (1) is provided with a worktable (11) inside, characterized in that: The workbench (11) has multiple sliding grooves inside, and a slider (14) is slidably connected inside the sliding groove of the workbench (11). A clamp (15) is fixedly connected to the top of the slider (14). The end of the clamp (15) is provided with a groove, and a deformable part (16) is provided at the end of the groove of the clamp (15). The deformable part (16) is used to contact and clamp the surface of the stamped part. The deformable part (16) can change and match the shape of the surface of the stamped part. It deforms inside the groove of the clamp (15). The slider (14) is used to drive the clamp (15) and the deformable part (16) to approach the stamped part for clamping.

2. The extrusion forming equipment for internal threads of irregularly shaped stamped parts according to claim 1, characterized in that: The slider (14) has a cross structure and a circular block inside. The cross structure of the slider (14) can be engaged in the groove of the worktable (11) to ensure the unidirectional movement of the clamp (15).

3. The extrusion forming equipment for internal threads of irregularly shaped stamped parts according to claim 1, characterized in that: The deformable part (16) includes a spring (161), which is fixedly connected to the bottom of the groove of the clamp (15). A flexible plate (160) is fixedly connected to the end of the spring (161), and the flexible plate (160) is located at the end of the groove of the clamp (15).

4. The extrusion forming equipment for internal threads of irregularly shaped stamped parts according to claim 3, characterized in that: The flexible plate (160) is made of silicone and has the ability to stretch and deform. It can also reduce contact friction. The flexible plate (160) is pressed and contacted by the surface of the stamped part and can adapt to deform and fit the surface shape of the stamped part.

5. The extrusion forming equipment for internal threads of irregularly shaped stamped parts according to claim 4, characterized in that: The inner wall of the groove of the clamp (15) is provided with arcs at both ends. The arcs of the clamp (15) can provide support for the soft plate (160) during deformation and relieve the bending pressure of the soft plate (160). The soft plate (160) can deform and be recessed into the groove of the clamp (15). The groove of the clamp (15) can clamp and limit the stamping part.

6. The extrusion forming equipment for internal threads of irregularly shaped stamped parts according to claim 2, characterized in that: The slider (14) has a screw (12) threaded inside its circular block. The screw (12) is located inside the groove of the worktable (11), and a motor (13) is provided at the end of the screw (12).

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