Deep drawing, trimming and stamping forming equipment for automobile motor shell

Abstract

The invention relates to an automobile motor shell deep drawing, trimming and stamping forming device which comprises an upper die and a lower die, the lower die is provided with a stamping base and a material supporting part used for supporting material belts, the feeding side and the discharging side of the material supporting part are each provided with a material belt stabilizing mechanism, and each material belt stabilizing mechanism comprises a clamping assembly and a driving assembly; the clamping assembly comprises at least one pair of oppositely-arranged clamping pieces, each clamping piece is provided with a fixed part and a movable part, and the movable parts can be controlled by the driving assembly to do opening and closing movement relative to the fixed parts so as to clamp or release the suspension sections of the material belts. The technical problem that the initial conditions for materials to flow into a female die are inconsistent due to the fact that a suspension section of a material belt vibrates up and down or drifts transversely in actual production of existing automobile motor shell stamping forming equipment is solved.

Description

Technical Field

[0001] This invention belongs to the field of motor housing processing technology, and particularly relates to deep drawing, trimming and stamping forming equipment for automotive motor housings. Background Technology

[0002] In the mass production of automotive motor housings, multi-station progressive dies are typically used for continuous stamping. A typical process flow includes: cutting slits in the strip to form a flexible connection area, multiple deep draws to gradually form the housing prototype, shaping, punching, trimming, and final cutting and separation.

[0003] In actual production, especially after the strip passes through the cutting station and forms a locally flexible connection area, the rigidity of the suspended section of the strip located between adjacent stations (such as between the cutting and stretching stations or between the stretching and rotary cutting stations) will be significantly reduced. During high-speed continuous stamping, the vibration of the equipment, the impact of the die, and the inertia of the strip itself can easily cause the suspended section to vibrate vertically or drift laterally. If this unstable state continues until the moment the deep drawing punch contacts the strip, it will lead to inconsistent initial conditions for the material to flow into the die, resulting in issues such as uneven circumferential shell wall thickness, different ellipticity at the opening, and microcracks caused by localized stress concentration.

[0004] Therefore, there is a need for a stamping forming equipment that can forcibly fix the suspended section of the strip before deep stretching deformation, in order to improve the forming quality and production stability of automotive motor housings. Summary of the Invention

[0005] The purpose of this invention is to provide a deep drawing and trimming stamping forming equipment for automotive motor housings, in order to solve the technical problem that existing automotive motor housing stamping forming equipment is prone to vertical vibration or lateral drift of the suspended section of the material strip in actual production, resulting in inconsistent initial conditions for the material to flow into the die.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a deep drawing, trimming, and stamping forming equipment for automotive motor housings, comprising an upper die and a lower die, wherein the lower die is provided with a stamping base and a material support portion for supporting the material strip, and both the feeding side and the discharge side of the material support portion are equipped with a material strip stabilizing mechanism, wherein the material strip stabilizing mechanism comprises a clamping assembly and a driving assembly, wherein the clamping assembly comprises at least a pair of oppositely arranged clamping members, wherein the clamping members have a fixed portion and a movable portion, and the movable portion can be controlled by the driving assembly to perform an opening and closing movement relative to the fixed portion to clamp or release the suspended segment of the material strip.

[0007] Preferably, the material support portion has mounting grooves on both sides, the fixing portion is fixed in the mounting grooves, and its top surface is flush with the top surface of the material support portion.

[0008] Preferably, the fixed part is provided with an adjustment seat, the adjustment seat has adjustment grooves on both sides, the movable part has actuating ends on both sides, the actuating ends pass through the adjustment grooves and extend outward from the adjustment seat, and a reset mechanism is provided between the actuating ends and the material support part.

[0009] Preferably, the reset mechanism includes a positioning rod and a reset spring. Adjustment holes that movably cooperate with the positioning rod are provided on the actuating ends on both sides of the movable part. The reset spring is sleeved on the positioning rod and located between the actuating end and the material support part.

[0010] Preferably, the adjusting seat has an upper docking hole, the top of the movable part has a drive rod, the drive rod passes through the upper docking hole and extends to the top of the adjusting seat, and its end has a positioning block.

[0011] Preferably, the driving assembly includes a plurality of pressing pins mounted on the upper mold. The pressing pins correspond to the positions of the positioning blocks. When the upper mold is pressed down, the pressing pins push the driving rod downward, causing the movable part to close onto the fixed part, thereby pressing down and clamping the suspended section of the material strip onto the surface of the material support part.

[0012] Preferably, the top surface of the positioning block is provided with a mating groove, and the bottom end of the pressing pin is provided with a mating protrusion that matches the mating groove.

[0013] Preferably, the material support part is vertically movably disposed on the stamping base, a protrusion is provided below the material support part, and a top material hole is provided on the material support part for the protrusion to extend or retract.

[0014] Preferably, the stamping base is provided with a plurality of drive slots, each drive slot is equipped with a spring and a drive column, the drive column can move up and down along the drive slot, its bottom end abuts against the spring and has an upward movement tendency under the elastic force of the spring, and the top end of the drive column is connected to the material support part.

[0015] Preferably, the upper die includes a stretching top seat, the lower pressure pin is fixed to the bottom of the stretching top seat and extends downward, multiple protrusions are provided and arranged in sequence on the stamping base, the bottom of the stretching top seat has a forming cavity at a position corresponding to each of the protrusions, the stamping base has a cutting device for cutting a flexible area on the material strip upstream along the material strip conveying direction, and a rotary cutting device for cutting the formed motor housing from the material strip downstream.

[0016] Compared with the prior art, the present invention has the following advantages through the above technical solution: By setting material strip stabilization mechanisms linked to the upper mold on both sides of the material support section, the vibration of the suspended section is eliminated, creating stable initial conditions for deep drawing forming. Specifically, when the upper mold presses down, the pressing pin fixed on it will first drive the movable part of the clamping component to close, thereby actively clamping and fixing the suspended section of the material strip to the surface of the material support section before the forming action begins. This ensures that the positioning state of the material remains consistent and accurate when it flows into the forming cavity of the subsequent station, solving technical problems such as uneven shell wall thickness, elliptical opening, and micro-cracks caused by unstable material flow conditions. Secondly, the above stabilization mechanism and the forming and ejection actions of the mold achieve coordinated operation. The entire workflow is as follows: the upper mold descends and first triggers the stabilization mechanism to fix the material strip, then stretches the top seat to press down the material support section, causing the protrusion to extend and cooperate with the forming cavity to complete deep drawing. Finally, the upper mold returns, and each component automatically resets, releases, and lifts the workpiece under the action of the spring, realizing automated continuous operation and ensuring smooth and stable high-speed production.

[0017] Meanwhile, the aforementioned structure effectively reduces malfunctions such as material jamming and mis-punching caused by material strip drift, ensuring production line safety. Furthermore, this design reduces abnormal wear on key mold components such as protrusions and forming cavities, extending mold lifespan. Integrating functions such as stabilization, stretching, and trimming within the progressive die also improves overall production efficiency and process compactness.

[0018] In summary, the present invention provides a deep drawing and trimming stamping forming equipment for automotive motor housings, which solves the technical problem that existing automotive motor housing stamping forming equipment easily causes the suspended section of the material strip to vibrate up and down or drift laterally in actual production, resulting in inconsistent initial conditions for the material to flow into the die. Attached Figure Description

[0019] To more clearly illustrate the technical solutions 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 the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a partial structural diagram of the stamping base and stretching top of the present invention; Figure 4 This is a top view of the material support section of the present invention in the material support state. Figure 5 This is a schematic diagram of the material support section in the material support state of the present invention; Figure 6 This is a schematic diagram of the material support section of the present invention in the state of material support; Figure 7 This is a schematic diagram of the connection structure between the material support part and the stamping base of the present invention; Figure 8 For the present invention Figure 7 A magnified structural diagram of point A; Figure 9 This is a schematic diagram of the material strip stabilization mechanism of the present invention; Figure 10 This is a schematic diagram of the main structure of the material stabilization mechanism of the present invention; Figure 11 This is a schematic diagram of the connection structure between the engagement protrusion and the engagement groove of the present invention; The invention reference information is as follows: 1. Upper die; 2. Lower die; 3. Strip material; 4. Strip material stabilizing mechanism; 5. Clamping component; 6. Reset mechanism; 8. Cutting device; 9. Rotary cutting device; 101. Pressing pin; 102. Engaging protrusion; 103. Stretching top seat; 104. Forming cavity; 201. Stamping base; 202. Material support part; 203. Mounting groove; 204. Protrusion; 501. Fixing part; 502. Movable part; 503. Adjusting seat; 504. Adjusting groove; 505. Actuating end; 506. Drive rod; 507. Positioning block; 508. Engaging groove; 601. Positioning rod; 602. Reset spring; The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] The following will refer to the appendices in the embodiments of the present invention. Figure 1-11 The technical solutions in the embodiments of the present invention are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0022] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0023] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0024] like Figure 1-11 The image shows a deep-drawing, trimming, and stamping forming equipment for automotive motor housings. It includes an upper die 1 for connection and fixation to the press slide, and a lower die 2 mounted on the press worktable. The lower die 2 includes a stamping base 201 providing overall mounting reference and support strength. A material support section 202, capable of reciprocating vertically, is provided on the stamping base 201. The function of the material support section 202 is to smoothly support the strip-shaped raw material, i.e., the strip 3, during production and guide it to complete deformation. At least two sets of identical strip stabilizing mechanisms 4 are symmetrically installed on the feeding and discharging sides of the material support section 202 along the conveying direction of the strip 3. Each strip stabilizing mechanism 4 consists of a clamping assembly and a driving assembly. The clamping assembly includes at least one pair of clamping members 5 arranged opposite each other along the width direction of the strip. Each clamping member 5 includes a fixed part 501 and a movable part 502 that can open and close relative to the fixed part 501. The drive assembly is used to control the movement of the moving part 502, so that it can clamp or release the suspended section with weak structural rigidity formed on the material strip 3 by the punching of the previous station when needed.

[0025] With the above structure, before the deep drawing operation begins, the drive assembly first activates, driving the movable part 502 to close. This clamps and presses the relatively weak material strip suspended between adjacent stations onto the surface of the material support part 202, achieving forced positioning. After the stamping operation is completed, the movable part 502 automatically opens, releasing the material strip for transport to the next station. This eliminates the vertical vibration and lateral drift of the suspended material strip caused by vibration and inertia during high-speed stamping, ensuring that the initial state of the material flowing into the forming area is highly consistent and stable.

[0026] like Figure 7As shown, mounting grooves 203 are provided on both sides of the material support section 202. In this embodiment, the fixing part 501 of the clamping member 5 is firmly embedded and fixed in the mounting groove 203 by means of interference fit, screw fastening or welding, and its top surface is flush with the top surface of the material support section 202. By embedding the fixing part 501 in the mounting groove 203, the integrity and compactness of the structure are ensured first, avoiding interference or weakness caused by external components. Secondly, the strict flushness between the top surface of the fixing part 501 and the top surface of the material support section 202 ensures that the material belt 3 is stable and unobstructed during conveying and support. This avoids height differences that could cause the material belt to scrape, warp or jam when passing through, affecting the feeding accuracy and material surface quality.

[0027] like Figure 8-10 As shown: An adjusting seat 503 is fixedly mounted on the fixed part 501. This adjusting seat 503 serves as the motion carrier and guide base for the movable part 502. Vertical adjusting grooves 504 are symmetrically formed on both side walls of the adjusting seat 503. Correspondingly, outwardly extending actuating ends 505 are provided on both sides of the movable part 502. These two actuating ends 505 pass through the corresponding adjusting grooves 504 and extend outward from the adjusting seat 503. The actuating ends 505 and the adjusting grooves 504 form a sliding connection, restricting the movable part 502 to linear movement only in the direction perpendicular to the surface of the material support part 202, i.e., vertically, and preventing lateral swinging or rotation, thus ensuring the accuracy of the clamping action. Furthermore, a reset mechanism 6 is provided between the actuating ends 505 and the lower material support part 202 body. This reset mechanism 6 provides an upward elastic reset force to the movable part 502, ensuring that the movable part 502 maintains consistency and stability of its movement trajectory during frequent opening and closing actions.

[0028] like Figure 8-10 As shown: The reset mechanism 6 includes at least one vertically fixed positioning rod 601 and a reset spring 602 sleeved on the positioning rod 601. Adjustment holes matching the diameter of the positioning rod 601 are correspondingly provided on the actuating ends 505 on both sides of the movable part 502. The positioning rod 601 passes through these adjustment holes, and the two are in a clearance fit, allowing the actuating end 505 to slide smoothly up and down along the positioning rod 601. The reset spring 602 is sleeved on the positioning rod 601 and is in a pre-compressed or compressible state. Its lower end is supported on the material support part 202 or a support base fixed to the material support part 202, while its upper end abuts against the lower surface of the actuating end 505.

[0029] The positioning rod 601, in conjunction with the adjusting hole, further enhances the guidance of the movement direction of the movable part 502, forming a double guide together with the adjusting groove 504, significantly improving movement accuracy. The return spring 602 is used to automatically open the movable part 502. When the external downward pressure is removed, the elastic potential energy stored in the return spring 602 is released, pushing the actuating end 505 and the entire movable part 502 upwards, automatically disengaging it from the material strip and returning it to its ready state.

[0030] like Figure 8 As shown: An upper mating hole is provided at the top center of the adjusting seat 503. A vertically upward driving rod 506 is fixedly connected to the top center of the movable part 502. The rod of the driving rod 506 passes through the upper mating hole on the adjusting seat 503 and extends upward beyond the upper surface of the adjusting seat 503. A positioning block 507 is fixedly provided at the top of the driving rod 506 extending out of the adjusting seat 503.

[0031] like Figure 2-3 As shown: The drive assembly consists of several pressing pins 101 mounted on the upper die 1. The positions of the pressing pins 101 ensure that when the upper die 1 and the lower die 2 are engaged, each pressing pin 101 is precisely aligned with the corresponding positioning block 507 on the vertical projection plane. Specifically, when the press slide moves the upper die 1 downward, the pressing pins 101 also move downward synchronously. Before the stretching punch contacts the main body of the strip 3 for forming, the bottom end of the pressing pin 101 first contacts and presses against the top surface of the positioning block 507. The force of the upper die 1 continuing to press down is transmitted through the pressing pins 101, the positioning block 507, and the drive rod 506, and is converted into a driving force that pushes the movable part 502 to move downward against the elastic force of the return spring 602, thereby closing the movable part 502 and working with the fixed part 501 to firmly press the suspended section of the strip 3 onto the surface of the support part 202.

[0032] like Figure 11 As shown: A mating groove 508 is machined at the center of the top surface of the positioning block 507. Correspondingly, a mating protrusion 102, matching the shape and size of the mating groove 508, is machined at the bottom end of the lower pressure needle 101. In this embodiment, the entrance of the mating groove 508 is designed with a chamfer or a conical surface. Through the cooperation of the mating protrusion 102 and the mating groove 508, a self-guiding structure is formed. Even if there is a slight lateral alignment error, when the lower pressure needle 101 moves downward, its mating protrusion 102 can smoothly slide into the mating groove 508 under the guidance of the conical surface, automatically correcting the deviation and achieving precise alignment.

[0033] The above workflow is as follows: When the upper die 1 begins to descend for stamping, the lower pressure pin 101 first contacts the lower positioning block 507. The engaging protrusion 102 is embedded in the engaging groove 508 to achieve precise force transmission and connection, preventing lateral slippage. As the upper die 1 continues to descend, the lower pressure pin 101 presses down on the drive rod 506, thereby driving the entire movable part 502 to move downward against the elastic force of the return spring 602 until the movable part 502 is tightly closed on the fixed part 501, thereby firmly clamping the suspended section of the passing material strip 3.

[0034] like Figure 1-3 As shown: The material support section 202 is vertically and movably mounted on the stamping base 201 via an elastic support system. Below the material support section 202, a protrusion 204, i.e., a punch, for forming the inner cavity shape of the motor housing, is fixedly mounted. A matching ejector hole is provided on the material support section 202 at a position corresponding to the protrusion 204. This ejector hole allows the protrusion 204 to pass through when the material support section 202 moves downward, thereby performing top pressing forming on the strip 3 placed thereon.

[0035] like Figure 2 As shown: Multiple drive slots distributed according to a certain pattern are machined on the stamping base 201. Each drive slot sequentially houses a spring (in this embodiment, a helical spring) as a power element and a drive column as a transmission element. The drive column can slide vertically within the drive slot, with its bottom end directly abutting against the upper end of the spring. The spring is usually pre-compressed, thus providing a continuous upward elastic thrust to the drive column. The tops of all drive columns are connected by bolts or flanges and support the material support part 202. Therefore, in the non-working state, i.e., when the upper die is open, the material support part 202 is held at its highest position under the combined force of the spring group; when subjected to downward pressure, the material support part 202 can overcome the elastic force and move downward.

[0036] The specific workflow is as follows: As the upper die 1 moves downwards, the lower pressure pin 101 first drives the stabilizing mechanism to clamp the strip. Then, the stretching top seat 103 contacts and presses down on the material support part 202. The material support part 202 overcomes the bottom spring force and descends, causing the protrusion 204 to gradually protrude from the ejector hole. This protrusion engages with the forming cavity 104 during the downward movement, performing deep stretching deformation on the clamped strip. During the return stroke of the upper die 1, under the action of the bottom spring, the drive column pushes the material support part 202 back up, and the protrusion 204 retracts. Simultaneously, the stabilizing mechanism opens under the action of the return spring 602, and the formed part is slightly lifted and detached from the punch for easy transfer. This structure achieves mechanical integration and sequential operation of the material support, stabilizing, forming, and ejection functions, resulting in a high degree of automation and reliable operation.

[0037] like Figure 2As shown: The upper die 1 includes a stretching top seat 103 as the main body, and all the lower pressure pins 101 are fixedly installed at its bottom and extend downward. Multiple protrusions 204 of the lower die are arranged and fixed sequentially on the stamping base 201 according to the product shape and process requirements. Correspondingly, at the bottom of the stretching top seat 103, opposite each protrusion 204, a matching forming cavity 104 is precisely machined, together forming the stretching die cavity. Furthermore, to reflect its continuity in the progressive die, a cutting device 8 is installed upstream of the stamping base 201 along the conveying direction of the strip 3, used to pre-punch process holes or separation areas on the strip to form a suspended section that facilitates stretching; a rotary cutting device 9 is installed downstream of it, used to finally cut and separate the semi-finished motor housing after forming and trimming at this station from the overlap of the strip 3.

[0038] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A deep drawing, trimming, and stamping forming equipment for automotive motor housings, comprising an upper die (1) and a lower die (2), characterized in that: The lower die (2) is provided with a stamping base (201) and a material support part (202) for supporting the strip (3). The material support part (202) is equipped with a strip stabilizing mechanism (4) on both the feeding side and the discharge side. The strip stabilizing mechanism (4) includes a clamping assembly and a driving assembly. The clamping assembly includes at least a pair of clamping members (5) arranged opposite to each other. The clamping member (5) has a fixed part (501) and a movable part (502). The movable part (502) can be controlled by the driving assembly to open and close relative to the fixed part (501) to clamp or release the suspended section of the strip (3).

2. The deep drawing, trimming, and stamping forming equipment for automotive motor housings according to claim 1, characterized in that: The material support part (202) has mounting grooves (203) on both sides, and the fixing part (501) is fixed in the mounting groove (203), and its top surface is flush with the top surface of the material support part (202).

3. The deep drawing, trimming, and stamping forming equipment for automotive motor housings according to claim 1, characterized in that: The fixed part (501) is provided with an adjustment seat (503), and adjustment grooves (504) are provided on both sides of the adjustment seat (503). The movable part (502) is provided with a toggle end (505) on both sides. The toggle end (505) passes through the adjustment groove (504) and extends to the outside of the adjustment seat (503). A reset mechanism (6) is provided between the toggle end (505) and the material support part (202).

4. The deep drawing, trimming, and stamping forming equipment for automotive motor housings according to claim 3, characterized in that: The reset mechanism (6) includes a positioning rod (601) and a reset spring (602). The actuating ends (505) on both sides of the movable part (502) are provided with adjustment holes that are movably engaged with the positioning rod (601). The reset spring (602) is sleeved on the positioning rod (601) and is located between the actuating end (505) and the material support part (202).

5. The deep drawing, trimming, and stamping forming equipment for automotive motor housings according to claim 3, characterized in that: The adjusting seat (503) has an upper docking hole, and the top of the movable part (502) is provided with a drive rod (506). The drive rod (506) passes through the upper docking hole and extends to the top of the adjusting seat (503), and its end is provided with a positioning block (507).

6. The deep drawing, trimming, and stamping forming equipment for automotive motor housings according to claim 5, characterized in that: The driving assembly includes several pressing pins (101) mounted on the upper mold (1). The pressing pins (101) correspond to the positions of the positioning block (507). When the upper mold (1) is pressed down, the pressing pins (101) push the driving rod (506) downward, causing the movable part (502) to close on the fixed part (501), thereby pressing down and clamping the suspended section of the material strip (3) on the surface of the material support part (202).

7. The deep drawing, trimming, and stamping forming equipment for automotive motor housings according to claim 6, characterized in that: The top surface of the positioning block (507) is provided with a mating groove (508), and the bottom end of the pressing pin (101) is provided with a mating protrusion (102) that matches the mating groove (508).

8. The deep drawing, trimming, and stamping forming equipment for automotive motor housings according to claim 1, characterized in that: The material support part (202) is vertically movable on the stamping base (201). A protrusion (204) is provided below the material support part (202). A top material hole is provided on the material support part (202) for the protrusion (204) to extend or retract.

9. The deep drawing, trimming, and stamping forming equipment for automotive motor housings according to claim 8, characterized in that: The stamping base (201) is provided with a plurality of drive slots, each drive slot is equipped with a spring and a drive column, the drive column can move up and down along the drive slot, its bottom end abuts against the spring and has an upward movement tendency under the elastic force of the spring, and the top end of the drive column is connected to the material support part (202).

10. The deep drawing, trimming, and stamping forming equipment for automotive motor housings according to claim 9, characterized in that: The upper mold (1) includes a stretching top seat (103), the lower presser (101) is fixed to the bottom of the stretching top seat (103) and extends downward, the protrusions (204) are provided in multiple and are arranged and fixed on the stamping base (201) in sequence, the bottom of the stretching top seat (103) has a forming cavity (104) at the position corresponding to each of the protrusions (204), the stamping base (201) has a cutting device (8) for cutting out a flexible area on the material strip (3) upstream along the conveying direction of the material strip (3), and a rotary cutting device (9) for cutting the formed motor housing from the material strip (3) downstream.

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