A metal sheet stamping forming equipment for processing the shell of a trowel machine

Abstract

The present invention discloses a metal sheet stamping and forming device for processing a trowel shell. The present invention relates to the technical field of stamping and forming devices, and comprises a base, a frame is fixedly installed on the top of the base, and a hydraulic driver is installed on the top of the inner edge surface of the frame. The metal sheet stamping and forming device for processing the trowel shell drives the punch and the edge holder to move downward by the hydraulic driver, and cooperates with the bottom mold to perform stamping and forming processing on the circular metal sheet placed thereon. With the cooperation of the ejector, the formed trowel shell can be ejected, thereby improving the production efficiency of the trowel shell, and the hydraulic driver is used to pre-stamp the metal sheet to concentrate the stamping process, so as to disperse the concentrated stress on the sheet, and avoid the situation that the trowel shell is partially torn or wrinkled due to excessive concentrated stress during the stamping and forming of the trowel shell, thereby improving the stamping and forming efficiency of the trowel shell.

Description

Technical Field

[0001] The invention relates to the technical field of stamping and forming equipment, in particular to a metal plate stamping and forming equipment for processing a trowel shell. Background Art

[0002] A trowel machine is a tool used to level and polish concrete surfaces, which mainly includes a motor, a gearbox, a trowel disc and a handle, etc. The shell of the trowel machine is usually made of metal to protect the internal mechanical parts and provide a stable structure. The working principle of the trowel machine is to drive the trowel disc to rotate through a motor to grind the concrete surface. When using the trowel machine, the operator needs to hold the handle and place the trowel disc on the concrete surface, and then push the trowel machine forward to rotate the trowel disc on the concrete surface, so as to achieve the purpose of leveling and polishing. During the molding process of the trowel machine shell, in order to meet product requirements, stamping equipment is often used to stamp metal sheets to obtain the shell structure of the trowel machine.

[0003] When stamping a round metal sheet, excessive concentrated stress during the drawing or bending of the sheet can cause local cracking of the material or wrinkling due to uneven material flow, which in turn affects the quality and processing efficiency of the trowel housing. Summary of the invention

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a metal sheet stamping and forming device for processing a trowel shell, comprising a base, which is the foundation of the entire device and provides a stable support platform, a frame is fixedly installed on the top of the base, the frame supports and fixes the equipment components to ensure the stability of the equipment, a hydraulic driver is installed on the top of the inner edge surface of the frame, the hydraulic driver provides hydraulic power to drive the stamping process, a punch is installed on the output end of the hydraulic driver, the punch is a component that directly stamps and forms the metal sheet, a bottom die is arranged directly below the punch, the bottom die cooperates with the punch to determine the shape and size of the stamping, the bottom die is installed on the top of the base, a edge holder is installed on the outer edge surface of the punch, the edge holder cooperates with the punch to press the edge of the sheet during the stamping process to prevent the sheet from wrinkling or deformation;

[0005] Among them, the punch includes an outer punch, which is used to complete the stamping and forming work. The top of the outer punch is connected to the output end of the hydraulic driver. A pre-punching head is arranged on the inner edge surface of the bottom of the outer punch. The pre-punching head performs preliminary shaping on the metal sheet before the outer punch formally punches. The outer edge surface of the pre-punching head slides with the inner edge surface of the outer punch. The top of the pre-punching head is fixedly connected with a sliding column. The outer edge surface of the sliding column is provided with a sleeve. The inner edge surface of the sleeve slides with the outer edge surface of the sliding column. The sleeve and the sliding column are used to support and limit the pre-punching head, and the top of the sleeve is fixed to the top of the inner cavity of the outer punch. An elastic support plate is fixedly installed on the outer edge surface of the sleeve. The bottom of the elastic support plate is fixed to the top of the pre-punching head. The elastic support plate provides elastic support for the pre-punching head during the stamping process, so that the pre-punching head can be reset after processing.

[0006] Preferably, a ejector is installed on the inner wall of the base, the top end of which extends to the inside of the bottom mold and contacts the inner edge surface of the bottom mold, and the ejector is used to eject the stamped trowel housing from the bottom mold.

[0007] Preferably, the hydraulic driver includes a hydraulic device, which controls the pressure, flow and direction of the hydraulic system to achieve precise stamping action. The hydraulic device is fixedly installed on the top of the inner edge surface of the frame, and the end of the output shaft of the hydraulic device is fixedly connected with a connecting column. The bottom of the connecting column is fixed to the top of the outer punch, and the connecting column is used to transmit the stamping force.

[0008] Preferably, a slide groove is provided on the inner edge surface of the outer punch, and a limiting slider is fixedly installed on the outer edge surface of the pre-punching head. The limiting slider and the slide groove are used to limit the pre-punching head to ensure the accuracy and safety of the punching process. The outer edge surface of the limiting slider slides with the inner wall of the slide groove, and a plurality of elastic support plates are provided, which are evenly distributed on the outer edge surface of the sleeve.

[0009] Preferably, the bottom die includes a die base, which is a die for determining the shape and size of the stamping forming, the bottom surface of the die base is fixed to the top of the base, the bottom surface of the inner cavity of the die base is provided with a through groove, a plate fixing rod is fixedly installed on the top of the die base, the plate fixing rod is used to limit the metal plate to prevent movement during the stamping process, the bottom surface of the die base is fixedly connected to an extension plate, the bottom surface of the extension plate is fixedly connected to a supporting column, the supporting column is used to support the die base, the bottom of the supporting column is fixed to the top of the base, the die base and the outer punch are on the same axis, the bottom of the die base is fixedly installed with an outer sleeve, and the outer edge surface of the outer sleeve is fixed to the top inner wall of the base.

[0010] Preferably, the edge clamp includes a edge clamp ring, which cooperates with the external punch to enhance the edge clamping effect. The edge clamp ring is arranged on the outside of the external punch, and a limiting rebound part is installed on the top of the edge clamp ring. One end of the limiting rebound part is connected to the top of the external punch. The limiting rebound part is used to help the component return to its initial position after stamping is completed.

[0011] Preferably, the edge pressing ring includes a ring plate, the inner edge surface of the ring plate slides with the outer edge surface of the outer punch, the bottom surface of the ring plate is provided with an installation groove, and a friction pad is fixedly installed on the inner wall of the installation groove, and the friction pad is used to increase the friction between the ring plate and the metal plate to improve the edge pressing effect.

[0012] Preferably, a deformation groove is provided on the bottom surface of the friction pad, which allows the friction pad to deform to a certain extent during the stamping process, thereby ensuring the fit between the friction pad and the metal plate. A plurality of friction pads are provided, and the plurality of friction pads are arranged at equal intervals. A connecting plate is fixedly connected between adjacent friction pads, and the top of the connecting plate is fixed to the top of the inner wall of the mounting groove.

[0013] Preferably, the limit rebound part includes a fixing plate, which plays a role of fixing and supporting, the bottom surface of the fixing plate is fixed to the top of the outer punch, the bottom surface of the extended lifting plate of the fixing plate is fixedly connected to a slide cylinder, the bottom of the slide cylinder is fixedly installed with a ring, the inner edge surface of the ring is slidably adapted with a connecting rod, the bottom surface of the connecting rod is fixed to the top of the ring plate, a limiting groove is provided on the outer edge surface of the slide cylinder, the top of the outer edge surface of the connecting rod is fixedly connected with a sliding block, the outer edge surface of the sliding block slides with the inner wall of the limiting groove, and the top of the connecting rod is fixedly connected with a return spring, the return spring is used to help the connecting rod return to its initial position after the stamping is completed, the sliding block is used to cooperate with the limiting groove to slide and limit the connecting rod, and the top of the return spring is fixed to the top of the inner cavity of the slide cylinder.

[0014] Preferably, the ejector includes a ejector plate, which is used to complete the ejection action, the outer edge surface of the ejector plate slides with the inner wall of the through groove, the bottom surface of the ejector plate is fixedly connected with a compression spring, the compression spring provides elastic force to help the ejector plate reset, the bottom surface of the compression spring is fixedly connected with a push plate, the outer edge surface of the push plate slides with the inner edge surface of the outer sleeve, the bottom of the push plate is fixedly installed with a cylinder, the push plate slides under the action of the cylinder to realize the ejection action, the cylinder is fixedly installed inside the base, the top of the push plate is fixedly connected with a limiting connecting rod, the limiting connecting rod is arranged on the outside of the compression spring, the outer edge surface of the limiting connecting rod is slidably adapted to the limiting tube, the top of the limiting tube is fixed to the bottom surface of the ejector plate, the limiting tube and the limiting connecting rod are used to limit the sliding position of the ejector plate.

[0015] The present invention provides a metal sheet stamping forming device for processing a trowel housing. It has the following beneficial effects:

[0016] 1. The metal sheet stamping and forming equipment for processing the trowel machine housing drives the punch and the edge holder downward through a hydraulic driver, and cooperates with the bottom mold to stamp and form the circular metal sheet placed thereon. With the cooperation of the ejector, the formed trowel machine housing can be ejected to improve the production efficiency of the trowel machine housing, and the hydraulic driver is used to pre-stamp the metal sheet to concentrate the stamping process to disperse the concentrated stress on the sheet, thereby avoiding the situation where the trowel machine housing is partially cracked or wrinkled due to excessive concentrated stress during stamping, thereby improving the stamping and forming efficiency of the trowel machine housing.

[0017] Second, the metal sheet stamping forming equipment processed by the trowel shell cooperates with the hydraulic device and the connecting column to move the outer punch downward, cooperate with the pre-punching head to contact the metal sheet placed on the die base and limited by the sheet fixing rod, and utilizes the pre-punching head to contact the metal sheet in advance. Under the action of the extrusion force, the pre-punching head slides inside the outer punch, and the metal sheet is initially formed into a shallow depression by the punching action of the pre-punching head, and then the outer punch is used for deep punching. The step-by-step process can reduce the load of a single punching, reduce stress concentration, and avoid excessive concentrated stress. In the event of local tearing or wrinkling of the material, in addition, the sliding of the limit slider in the slide groove is used to limit the pre-punching head to ensure the stability of the pre-punching head sliding in the outer punch, and then the sliding column slides in the elastic support plate to limit the upward position of the pre-punching head to prevent the pre-punching head from sliding excessively in the outer punch, causing the gap between the outer punch and the pre-punching head to affect the forming surface shape of the trowel machine housing, and further, the rebound effect of the elastic support plate can be used to push the pre-punching head back to its original position after processing is completed, thereby ensuring the quality of the stamping processing of the trowel machine housing.

[0018] 3. The metal sheet stamping and forming equipment processed by the polishing machine shell moves the outer punch under the action of the hydraulic device and the connecting column, so that the ring plate contacts the metal sheet, applies pressure to the metal sheet, and restricts the edge of the metal sheet to prevent wrinkling, while also reducing the tensile stress concentration caused by limited material flow. The friction force generated by the contact between the friction pad and the metal sheet is used in conjunction with the deformation of the deformation groove to increase the edge pressing effect of the ring plate on the edge of the metal sheet, thereby preventing excessive warping of the edge and affecting the appearance of the finished product.

[0019] 4. The metal sheet stamping and forming equipment processed by the polishing machine shell uses the reverse force generated by the contact between the ring plate and the metal sheet to make the ring plate slide outside the outer punch, and the extrusion connecting rod slides in the slide cylinder, cooperating with the sliding block in the limit groove to ensure the stability of the sliding of the connecting rod, and then using the deformation generated by the connecting rod extrusion reset spring and the rebound force of the reset spring to further ensure the edge pressing effect of the ring plate on the edge of the metal sheet.

[0020] 5. The metal sheet stamping and forming equipment for processing the polishing machine housing uses the deformation caused by the pressure on the metal sheet in the die base to contact the ejector plate so that the ejector plate moves down and slides in the outer sleeve, and compresses the compression spring to deform, so that the limit tube slides outside the limit connecting rod. After the stamping is completed, the push plate is driven by the cylinder and the rebound force of the compression spring is used to force the formed polishing machine housing to be lifted up from the die base, thereby facilitating the operator to take and put materials, and further improving the processing efficiency of the polishing machine housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the external structure of a metal sheet stamping and forming device for processing a trowel housing according to the present invention;

[0022] Figure 2 It is a three-dimensional structural schematic diagram of the frame, hydraulic driver, punch and edge holder of the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the connecting column, the punch and the edge holder of the present invention;

[0024] Figure 4 It is a schematic diagram of the partial cross-section structure of the punch and the edge holder of the present invention;

[0025] Figure 5 It is a schematic diagram of the partial cross-section structure of the punch of the present invention;

[0026] Figure 6 It is a schematic diagram of the cross-sectional structure of the edge pressure ring of the present invention;

[0027] Figure 7 It is a schematic diagram of the three-dimensional structure of the position-limiting resilient member of the present invention;

[0028] Figure 8 It is a schematic diagram of the three-dimensional structure of the base, bottom mold and ejector of the present invention;

[0029] Fig. 9 It is a schematic diagram of the partial cross-sectional structure of the bottom mold and the ejector of the present invention.

[0030] In the figure: 1, base; 2, frame; 3, hydraulic driver; 31, hydraulic device; 32, connecting column; 4, punch; 41, outer punch; 42, pre-punch; 43, limit slider; 44, slide; 45, sleeve; 46, sliding column; 47, elastic support plate; 5, bottom die; 51, die base; 52, plate fixing rod; 53, supporting column; 54, outer sleeve; 6, edge holder; 61, edge holder ring; 611, ring Plate; 612, mounting groove; 613, friction pad; 614, deformation groove; 615, connecting plate; 62, limit rebound member; 621, fixing plate; 622, slide cylinder; 623, connecting rod; 624, sleeve ring; 625, sliding block; 626, return spring; 627, limit groove; 7, ejector; 71, ejector plate; 72, compression spring; 73, limit tube; 74, limit connecting rod; 75, push plate; 76, cylinder. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0032] The first embodiment, as Figures 1 to 5 As shown, the present invention provides a technical solution: a metal sheet stamping and forming device for processing a trowel shell, comprising a base 1, a frame 2 is fixedly installed on the top of the base 1, a hydraulic driver 3 is installed on the top of the inner edge surface of the frame 2, a punch 4 is installed on the output end of the hydraulic driver 3, a bottom die 5 is arranged directly below the punch 4, the bottom die 5 is installed on the top of the base 1, a side clamp 6 is installed on the outer edge surface of the punch 4, and a ejector 7 is installed on the inner wall of the base 1, the top of the ejector 7 extends to the inside of the bottom die 5 and contacts with the inner edge surface of the bottom die 5, the punch 4 and the side clamp 6 are driven downward by the hydraulic driver 3, and the circular metal sheet placed thereon is stamped and formed in cooperation with the bottom die 5, the ejector 7 is used to eject the formed trowel shell, and the hydraulic driver 3 is used to pre-stamp the metal sheet to a concentrated stamping process, so as to disperse the concentrated stress on the sheet, so as to avoid the situation that the material is locally cracked or wrinkled due to excessive concentrated stress during the stamping and forming of the trowel shell;

[0033] The punch 4 includes an outer punch 41, the top of which is connected to the output end of the hydraulic driver 3, a pre-punching head 42 is arranged on the inner edge surface of the bottom of the outer punch 41, the outer edge surface of the pre-punching head 42 slides with the inner edge surface of the outer punch 41, and a sliding column 46 is fixedly connected to the top of the pre-punching head 42, a sleeve 45 is arranged on the outer edge surface of the sliding column 46, the inner edge surface of the sleeve 45 slides with the outer edge surface of the sliding column 46, and the top of the sleeve 45 is fixed to the top of the inner cavity of the outer punch 41, and an elastic support plate 47 is fixedly installed on the outer edge surface of the sleeve 45, and the bottom of the elastic support plate 47 is connected to the top of the pre-punching head 42. The hydraulic driver 3 includes a hydraulic device 31, which is fixedly mounted on the top of the inner edge surface of the frame 2. The output shaft end of the hydraulic device 31 is fixedly connected with a connecting column 32. The bottom of the connecting column 32 is fixed to the top of the outer punch 41. A slide groove 44 is provided on the inner edge surface of the outer punch 41. A limit slider 43 is fixedly installed on the outer edge surface of the pre-punching head 42. The outer edge surface of the limit slider 43 slides with the inner wall of the slide groove 44. A plurality of elastic support plates 47 are provided, which are evenly spaced and distributed on the outer edge surface of the sleeve 45. The bottom die 5 includes a die seat 51. The bottom surface of the die seat 51 is fixed to the top of the base 1. Through the hydraulic device The output shaft of the device 31 drives the connecting column 32 to move downward, so that the outer punch 41 moves downward, and cooperates with the pre-punching head 42 to contact the metal plate placed on the die base 51 and limited by the plate fixing rod 52. The pre-punching head 42 is used to contact the metal plate, and the pre-punching head 42 slides inside the outer punch 41 under the action of the extrusion force, so that the metal plate is initially formed into a shallow depression by the punching action of the pre-punching head 42. A through groove is provided on the bottom surface of the inner cavity of the die base 51, and a plate fixing rod 52 is fixedly installed on the top of the die base 51. The bottom surface of the die base 51 is fixedly connected to an extension plate, and the bottom surface of the extension plate is fixedly connected to a supporting column 53. The bottom of the supporting column 53 is fixed to the top of the base 1. The die base 51 and the outer punch 41 are located on the same axis, and an outer sleeve 54 is fixedly installed at the bottom of the die base 51. The outer edge surface of the outer sleeve 54 is fixed to the top inner wall of the base 1. The outer punch 41 is used for deep punching, and the process is performed in steps to reduce the load of a single punching and reduce stress concentration. The pre-punching head 42 is limited by the sliding of the limiting slider 43 in the slide groove 44, and the sliding of the sliding column 46 in the elastic support plate 47 is used to limit the upward position of the pre-punching head 42 to prevent the pre-punching head 42 from sliding excessively in the outer punch 41. The rebound effect of the elastic support plate 47 can be used to push the pre-punching head 42 back to its original position after the processing is completed.

[0034] During operation, the staff places the circular metal sheet on the die base 51, fixes the circular metal sheet with the plate fixing rod 52, and then drives the connecting column 32 downward through the output shaft of the hydraulic device 31, so that the outer punch 41 moves downward, cooperates with the pre-punching head 42 to contact the metal sheet placed on the die base 51 and limited by the plate fixing rod 52, utilizes the pre-punching head 42 to contact with the metal sheet, and slides the pre-punching head 42 inside the outer punch 41 under the action of the extrusion force, so that the metal sheet is initially formed with a shallow depression by the punching action of the pre-punching head 42, and uses the outer punch 41 to perform deep punching, and processes in steps to reduce the load of a single punching and reduce stress concentration, and utilizes the sliding of the limit slider 43 in the slide groove 44, The pre-punching head 42 is limited, and then the sliding column 46 cooperates with the sliding of the elastic support plate 47 to limit the upward position of the pre-punching head 42, and prevent the pre-punching head 42 from sliding excessively in the outer punch 41. The elastic support plate 47 can be used to rebound and push the pre-punching head 42 back to its original position after processing. The metal sheet is pre-punched to a concentrated punching process through the hydraulic driver 3 to disperse the concentrated stress on the sheet, so as to avoid local tearing or wrinkling of the material due to excessive concentrated stress during stamping of the trowel machine housing. After the trowel machine housing is processed, the ejector 7 is used to eject the formed trowel machine housing, and the staff can take out the trowel machine housing for the next processing step.

[0035] The second embodiment is based on the first embodiment. Figures 3 to 7 As shown, the edge holder 6 includes an edge holder ring 61, which is arranged outside the outer punch 41, and a limit springback member 62 is installed on the top of the edge holder ring 61, and one end of the limit springback member 62 is connected to the top of the outer punch 41;

[0036] The edge pressing ring 61 includes a ring plate 611, the inner edge surface of the ring plate 611 slides with the outer edge surface of the outer punch 41, a mounting groove 612 is provided on the bottom surface of the ring plate 611, a friction pad 613 is fixedly installed on the inner wall of the mounting groove 612, a deformation groove 614 is provided on the bottom surface of the friction pad 613, a plurality of friction pads 613 are provided, and the plurality of friction pads 613 are arranged at equal intervals, and a connecting plate 615 is fixedly connected between adjacent friction pads 613, and the top of the connecting plate 615 is fixed to the top of the inner wall of the mounting groove 612, the ring plate 611 is driven by the outer punch 41 to contact with the metal sheet, apply pressure to the metal sheet, limit the edge of the metal sheet, prevent wrinkling, and reduce the tensile stress concentration caused by the limited flow of the material, and utilize the friction force generated by the contact between the friction pad 613 and the metal sheet to cooperate with the deformation of the deformation groove 614 to increase the edge pressing effect of the ring plate 611 on the edge of the metal sheet, and prevent the edge from being excessively warped and affecting the appearance of the finished product;

[0037] The limit rebound member 62 includes a fixed plate 621, the bottom surface of the fixed plate 621 is fixed to the top of the outer punch 41, the bottom surface of the extended lifting plate of the fixed plate 621 is fixedly connected to a slide 622, the bottom of the slide 622 is fixedly installed with a collar 624, the inner edge surface of the collar 624 is slidably adapted with a connecting rod 623, the bottom surface of the connecting rod 623 is fixed to the top of the ring plate 611, the outer edge surface of the slide 622 is provided with a limit groove 627, the outer edge surface of the connecting rod 623 is fixedly connected to a sliding block 625, and the outer edge surface of the sliding block 625 slides with the inner wall of the limit groove 627 The top of the connecting rod 623 is fixedly connected with a return spring 626, and the top of the return spring 626 is fixed to the top of the inner cavity of the slide tube 622. The reverse force generated by the contact between the ring plate 611 and the metal plate causes the ring plate 611 to slide outside the outer punch 41, and the connecting rod 623 is squeezed to slide in the slide tube 622, and the sliding of the sliding block 625 in the limiting groove 627 is cooperated to ensure the stability of the sliding of the connecting rod 623, and then the deformation caused by squeezing the return spring 626 by the connecting rod 623, and the resilience of the return spring 626 is used to further ensure the edge pressing effect of the ring plate 611 on the edge of the metal plate.

[0038] During operation, the outer punch 41 drives the ring plate 611 to contact the metal sheet, applies pressure to the metal sheet, restricts the edge of the metal sheet, prevents wrinkling, and reduces the tensile stress concentration caused by limited material flow. The friction force generated by the contact between the friction pad 613 and the metal sheet is combined with the deformation of the deformation groove 614 to increase the edge pressing effect of the ring plate 611 on the edge of the metal sheet to prevent excessive warping of the edge and affect the appearance of the finished product. The reverse force generated by the contact between the ring plate 611 and the metal sheet is then used to make the ring plate 611 slide outside the outer punch 41, and the connecting rod 623 is squeezed to slide in the slide cylinder 622. The deformation caused by squeezing the reset spring 626 by the connecting rod 623 is combined with the resilience of the reset spring 626 to further ensure the edge pressing effect of the ring plate 611 on the edge of the metal sheet.

[0039] The third embodiment is based on the first and second embodiments. Figure 8 , Fig. 9As shown, the ejector 7 includes an ejector plate 71, the outer edge surface of the ejector plate 71 slides with the inner wall of the through groove, the bottom surface of the ejector plate 71 is fixedly connected with a compression spring 72, the bottom surface of the compression spring 72 is fixedly connected with a push plate 75, the outer edge surface of the push plate 75 slides with the inner edge surface of the outer sleeve 54, the bottom of the push plate 75 is fixedly installed with a cylinder 76, the cylinder 76 is fixedly installed inside the base 1, the top of the push plate 75 is fixedly connected with a limiting connecting rod 74, the limiting connecting rod 74 is arranged on the outside of the compression spring 72, and the outer edge surface of the limiting connecting rod 74 slides with the limited The top of the limiting tube 73 is fixed to the bottom surface of the ejector plate 71, and the metal plate is deformed by the pressure on the die base 51 to contact the ejector plate 71, so that the ejector plate 71 moves down and slides in the outer sleeve 54, and compresses the compression spring 72 to deform, so that the limiting tube 73 slides outside the limiting connecting rod 74. After the stamping is completed, the cylinder 76 drives the push plate 75, and the rebound force of the compression spring 72 can force the formed trowel machine housing to be lifted up from the die base 51, thereby facilitating the operator to take and put materials, and further improving the processing efficiency of the trowel machine housing.

[0040] During operation, the deformation caused by the pressure on the metal sheet in the die base 51 contacts the ejector plate 71, causing the ejector plate 71 to move downward and slide in the outer sleeve 54, compressing the compression spring 72 to deform, causing the limit tube 73 to slide outside the limit connecting rod 74. After the stamping is completed, the output shaft of the cylinder 76 is used to push the push plate 75 to move, and the rebound force of the compression spring 72 is used to force the formed trowel machine housing to be lifted up from the die base 51.

[0041] The following is a detailed description of the working principle of the metal sheet stamping and forming equipment for processing the polishing machine housing.

[0042] When in use, the staff places the circular metal sheet on the die base 51, fixes the circular metal sheet with the plate fixing rod 52, and then drives the connecting column 32 downward through the output shaft of the hydraulic device 31 to move the outer punch 41 downward, and cooperates with the pre-punching head 42 to contact the metal sheet placed on the die base 51 and limited by the plate fixing rod 52, and utilizes the pre-punching head 42 to contact with the metal sheet in advance, and the pre-punching head 42 slides inside the outer punch 41 under the action of the extrusion force, so that the metal sheet is initially formed with a shallow depression by the punching action of the pre-punching head 42, so as to utilize the pre-punching head 42 to make the metal sheet have a shallow depression. The outer punch 41 is used for deep punching, and the process is carried out in steps to reduce the load of a single punching and reduce stress concentration. The pre-punching head 42 is limited by the sliding of the limit slider 43 in the slide groove 44, and then the sliding of the sliding column 46 in the elastic support plate 47 is coordinated to limit the upward position of the pre-punching head 42 to prevent the pre-punching head 42 from sliding excessively in the outer punch 41. At the same time, the outer punch 41 drives the ring plate 611 to contact the metal sheet, exerts pressure on the metal sheet, limits the edge of the metal sheet, prevents wrinkling, and reduces the flow of the material. The tensile stress is concentrated, and the friction force generated by the contact between the friction pad 613 and the metal plate is used to cooperate with the deformation of the deformation groove 614 to increase the edge pressing effect of the ring plate 611 on the edge of the metal plate to prevent the edge from being excessively warped and affecting the appearance of the finished product. The reverse force generated by the contact between the ring plate 611 and the metal plate is used to make the ring plate 611 slide outside the outer punch 41, and the connecting rod 623 is squeezed to slide in the slide cylinder 622. The deformation caused by the connecting rod 623 squeezing the reset spring 626 is combined with the resilience of the reset spring 626 to further ensure that the ring plate 61 1 has a pressing effect on the edge of the metal sheet. The metal sheet is pre-punched to a concentrated punching process through the hydraulic driver 3 and the punch 4 to disperse the concentrated stress on the sheet to avoid the situation where the material is partially cracked or wrinkled due to excessive concentrated stress during the stamping of the trowel shell. After the trowel shell is processed, the output shaft of the cylinder 76 is used to push the push plate 75 to move, and the rebound force of the compression spring 72 is used to force the formed trowel shell to be lifted up from the die base 51. The staff can take out the trowel shell for the next processing step.

[0043] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A metal sheet stamping forming device for processing a trowel housing, characterized in that: The invention comprises a base (1), a frame (2) is fixedly mounted on the top of the base (1), a hydraulic driver (3) is mounted on the top of the inner edge surface of the frame (2), a punch (4) is mounted on the output end of the hydraulic driver (3), a bottom die (5) is arranged directly below the punch (4), the bottom die (5) is mounted on the top of the base (1), and a flange holder (6) is mounted on the outer edge surface of the punch (4); The punch (4) comprises an outer punch (41), the top of the outer punch (41) is connected to the output end of the hydraulic driver (3), a pre-punching head (42) is arranged on the inner edge surface of the bottom of the outer punch (41), the outer edge surface of the pre-punching head (42) slides with the inner edge surface of the outer punch (41), the top of the pre-punching head (42) is fixedly connected to a sliding column (46), the outer edge surface of the sliding column (46) is provided with a sleeve (45), the inner edge surface of the sleeve (45) slides with the outer edge surface of the sliding column (46), and the top of the sleeve (45) is fixed to the top of the inner cavity of the outer punch (41), and an elastic support plate (47) is fixedly installed on the outer edge surface of the sleeve (45), and the bottom of the elastic support plate (47) is fixed to the top of the pre-punching head (42); A material ejector (7) is installed on the inner wall of the base (1), and the top end of the material ejector (7) extends to the inside of the bottom mold (5) and contacts the inner edge surface of the bottom mold (5); The hydraulic driver (3) comprises a hydraulic device (31), the hydraulic device (31) being fixedly mounted on the top of the inner edge surface of the frame (2), the output shaft end of the hydraulic device (31) being fixedly connected to a connecting column (32), the bottom of the connecting column (32) being fixed to the top of the outer punch (41); A slide groove (44) is provided on the inner edge surface of the outer punch (41), a limit slider (43) is fixedly installed on the outer edge surface of the pre-punching head (42), the outer edge surface of the limit slider (43) slides with the inner wall of the slide groove (44), and a plurality of elastic support plates (47) are provided and are evenly spaced and distributed on the outer edge surface of the sleeve (45); The bottom die (5) comprises a die base (51), the bottom surface of the die base (51) is fixed to the top of the base (1), a through groove is provided on the bottom surface of the inner cavity of the die base (51), a plate fixing rod (52) is fixedly installed on the top of the die base (51), an extension plate is fixedly connected to the bottom surface of the die base (51), a supporting column (53) is fixedly connected to the bottom surface of the extension plate, the bottom of the supporting column (53) is fixed to the top of the base (1), the die base (51) and the outer punch (41) are on the same axis, an outer sleeve (54) is fixedly installed on the bottom of the die base (51), and the outer edge surface of the outer sleeve (54) is fixed to the inner wall of the top of the base (1); The edge holder (6) comprises an edge holder ring (61), the edge holder ring (61) is arranged outside the outer punch (41), and a limit rebound member (62) is installed on the top of the edge holder ring (61), and one end of the limit rebound member (62) is connected to the top of the outer punch (41).

2. The metal sheet stamping forming equipment for processing the shell of a trowel machine according to claim 1, characterized in that: The pressure ring (61) comprises a ring plate (611), the inner edge surface of the ring plate (611) slides with the outer edge surface of the outer punch (41), a mounting groove (612) is formed on the bottom surface of the ring plate (611), and a friction pad (613) is fixedly mounted on the inner wall of the mounting groove (612).

3. The metal sheet stamping forming equipment for processing the trowel housing according to claim 2, characterized in that: A deformation groove (614) is provided on the bottom surface of the friction pad (613), a plurality of the friction pads (613) are provided, and the plurality of the friction pads (613) are arranged at equal intervals, and a connecting plate (615) is fixedly connected between adjacent friction pads (613), and the top of the connecting plate (615) is fixed to the top of the inner wall of the mounting groove (612).

4. The metal sheet stamping forming equipment for processing the shell of a trowel machine according to claim 3, characterized in that: The limit rebound member (62) includes a fixing plate (621), the bottom surface of the fixing plate (621) is fixed to the top of the outer punch (41), the bottom surface of the extension raising plate of the fixing plate (621) is fixedly connected to a slide cylinder (622), the bottom of the slide cylinder (622) is fixedly mounted with a collar (624), the inner edge surface of the collar (624) is slidably adapted with a connecting rod (623), the bottom surface of the connecting rod (623) is in contact with the ring plate (611), and the bottom surface of the ring plate (611) is fixedly connected to the slide cylinder (622). ), a limiting groove (627) is provided on the outer edge surface of the slide cylinder (622), a sliding block (625) is fixedly connected to the top of the outer edge surface of the connecting rod (623), the outer edge surface of the sliding block (625) slides with the inner wall of the limiting groove (627), and a return spring (626) is fixedly connected to the top of the connecting rod (623), and the top of the return spring (626) is fixed to the top of the inner cavity of the slide cylinder (622).

5. The metal sheet stamping forming equipment for processing the shell of a trowel machine according to claim 4, characterized in that: The ejector (7) includes an ejector plate (71), the outer edge surface of the ejector plate (71) slides with the inner wall of the through groove, the bottom surface of the ejector plate (71) is fixedly connected to a compression spring (72), the bottom surface of the compression spring (72) is fixedly connected to a push plate (75), the outer edge surface of the push plate (75) slides with the inner edge surface of the outer sleeve (54), the bottom of the push plate (75) is fixedly installed with a cylinder (76), the cylinder (76) is fixedly installed inside the base (1), the top of the push plate (75) is fixedly connected to a limiting connecting rod (74), the limiting connecting rod (74) is arranged on the outside of the compression spring (72), the outer edge surface of the limiting connecting rod (74) is slidably adapted to the limiting tube (73), and the top of the limiting tube (73) is fixed to the bottom surface of the ejector plate (71).

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