Stamping device for aluminum profile machining
By designing a stamping device for aluminum profile processing, including a pneumatic buffering mechanism and a material push cleaning mechanism, the problem of difficult removal of debris during aluminum profile stamping is solved, and the rapid discharge of stamping molded parts and debris is achieved, and stamping efficiency and environmental safety are improved.
Patent Information
- Application Number
- CN202421543025.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-07-02
AI Technical Summary
During the stamping process of aluminum profiles, debris are easily generated, and the prior art is difficult to effectively remove debris, which affects the quality of subsequent stamping forming, and may cause debris to overflow and affect the stamping environment.
A stamping device for aluminum profile processing is designed, including a pneumatic buffering mechanism and a material push cleaning mechanism. The pneumatic pressure buffering mechanism uses the pneumatic cylinder block and the pneumatic piston to buffer the downward pressure of the punch head to prevent damage to the impact. The material push cleaning mechanism uses the material push cleaning rod and the air pressure cylinder to clean the debris in the feeding tray, and pushes the stamping molded parts and debris through the downward drive.
It effectively prevents the stamping head from being pressed too fast, avoids impact damage, and realizes rapid discharge of stamping molded parts and debris, improving the efficiency of the stamping process and environmental safety.
Smart Images

Figure CN222754179U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of stamping, in particular to a stamping device used for processing aluminum profiles. Background Art
[0002] Aluminum profile stamping parts are metal parts formed by stamping aluminum profile raw materials through a stamping device. Aluminum profile stamping parts are widely used in various fields. For example, the Chinese patent with application number CN202343707U discloses an aluminum profile stamping die, including an upper die base, an upper template fixedly connected to the upper die base, a stripper plate, a lower die base, a concave die fixed to the lower die base, a punch fixed to the upper template, and a limiting protrusion is provided at the lower end of the punch.
[0003] However, the above solution has the following shortcomings:
[0004] When aluminum profile raw materials are stamped, debris will be generated, and the metal parts formed by stamping will fall together with the debris. The debris and metal parts need to be removed manually. If the debris and metal parts cannot be removed in time, the subsequent stamping of metal parts will be affected, and the debris may overflow, resulting in substandard stamping environment. For this reason, we have launched a stamping device for aluminum profile processing. Utility Model Content
[0005] The purpose of the utility model is to provide a punching device for aluminum profile processing to solve the problems raised in the above background technology.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a stamping device for aluminum profile processing, comprising a stamping table, an equipment table arranged at the rear end of the stamping table, a material pushing and cleaning mechanism arranged at the front of the upper end of the equipment table, and a hydraulic cylinder installed at the rear of the upper end of the equipment table through a bracket, a stamping seat is arranged at the upper end of the stamping table, a stamping forming through groove is arranged in the middle of the stamping seat, and a placement groove is also arranged on the stamping table at the four corners of the stamping seat, and a pneumatic buffer mechanism is arranged in the placement groove;
[0007] The hydraulic rod at the output end of the hydraulic cylinder passes through the bracket and is connected to a punch head mechanism, the punch head mechanism includes a punch head fixed at the lower end of the hydraulic rod and a downward pressing driving member connected to the rear end of the punch head;
[0008] After the punch head is pressed down, the air pressure buffer mechanism realizes the buffering of the downward pressure of the punch head, and is also used to blow air into the receiving tray inside the punching table through the pushing cleaning rod at the front of the pushing cleaning mechanism to clean the debris. At this time, the pressing driving member drives the pushing cleaning rod to rotate, so that the pushing cleaning rod pushes the stamped parts and debris in the receiving tray out of the punching table;
[0009] After the punch head moves up and resets, the reset mechanism on the push cleaning mechanism drives the push cleaning rod to rotate and reset.
[0010] Preferably, the stamping platform is further provided with positioning columns located on the left and right sides of the stamping seat, and the stamping head is provided with positioning through holes matching the positioning columns.
[0011] Preferably, the pneumatic buffer mechanism includes a pneumatic cylinder body arranged in the placement groove, a pneumatic piston arranged inside the pneumatic cylinder body, a buffer spring connected to the lower end of the pneumatic piston, and a vertical pressure rod connected to the upper end of the pneumatic piston and extending out of the pneumatic cylinder body.
[0012] Preferably, the material pushing and cleaning mechanism comprises a bottom cylinder fixed to the upper end of the equipment table, a vertical connecting shaft arranged at the upper end of the bottom cylinder, and a top cylinder sleeved on the vertical connecting shaft;
[0013] The bottom of the pneumatic cylinder is connected to the air inlet cavity in the bottom tube through a pipeline, and the top of the air inlet cavity is connected to the air outlet hole opened on the surface of the vertical connecting shaft through the air guide channel inside the vertical connecting shaft;
[0014] The vertical connecting shaft is provided with annular sealing grooves located on the upper and lower sides of the air outlet, the sealing ring in the annular sealing groove is tightly attached to the inner wall of the top tube, and the inner wall of the top tube is also provided with an annular groove located between the upper and lower sealing rings, and the height of the air outlet is located in the middle of the annular groove.
[0015] Preferably, the pusher cleaning rod comprises a rotating arm connected to the front part of the side edge of the top cylinder and a pusher seat integrally connected to the bottom of the front end of the rotating arm, the pusher seat extends into the interior of the punching table, and the cleaning brush at the lower end of the pusher seat is located in the receiving tray;
[0016] A horizontal air passage communicating with the annular groove is arranged inside the rotating arm, and a plurality of groups of vertical air passages communicating with the horizontal air passage are arranged inside the pushing seat, and the bottom of the vertical air passages extends to the lower end surface of the pushing seat.
[0017] The downward pressing driving member comprises a horizontal arm connected to the rear end of the punch head and a horizontal pressing rod fixed to the side of the rear end of the horizontal arm;
[0018] The pusher cleaning rod also includes a horizontal plate connected to the side of the top cylinder and a pusher block seat arranged at the top of the end of the horizontal plate. The horizontal pressure rod is located above the pusher block seat, and the upper end surface of the pusher block seat is provided with an inclined surface that gradually decreases in height backwards.
[0019] Preferably, the reset mechanism includes an arc-shaped arm connected to the side of the rotating arm and an arc-shaped limit seat fixed to the upper end of the equipment platform through a column, a reset spring is provided in the arc-shaped groove inside one end of the arc-shaped limit seat, and a limit baffle is provided at the other end of the arc-shaped limit seat, and the arc-shaped arm is inserted into the arc-shaped groove.
[0020] Compared with the prior art, the beneficial effects of the utility model are as follows: after the punch head is pressed down, the pneumatic buffer mechanism of the utility model realizes buffering of the downward pressure of the punch head, which can prevent the punch head from pressing down too fast and directly punching the punch seat, thereby avoiding the punch seat from being damaged by impact. At the same time, the pneumatic buffer mechanism is also used to blow air into the receiving tray inside the punching table to clean debris through the pushing cleaning rod at the front of the pushing cleaning mechanism. At this time, the downward driving part drives the pushing cleaning rod to rotate, so that the pushing cleaning rod pushes the stamped parts and debris in the receiving tray out of the punching table, which is conducive to the rapid discharge of the stamped parts and debris; after the punch head is moved up and reset, the reset mechanism on the pushing cleaning mechanism drives the pushing cleaning rod to rotate and reset. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a schematic diagram of the exploded structure of the overall assembly of the utility model;
[0022] Figure 2 It is a three-dimensional structural diagram of the connection between the punching table and the equipment table of the utility model;
[0023] Figure 3 It is a three-dimensional structural diagram of the connection of the pipeline, the pneumatic cylinder body and the bottom tube of the utility model;
[0024] Figure 4 This is a schematic diagram of the exploded structure of the material pushing and cleaning mechanism of the utility model;
[0025] Figure 5 This is a schematic diagram of the structure of the material pushing and cleaning mechanism of the utility model in the initial state;
[0026] Figure 6 For this utility model Figure 5 A schematic diagram of a top view structure;
[0027] Figure 7 It is a cross-sectional structural diagram of the connection between the arc-shaped arm, the return spring and the arc-shaped limit seat of the utility model;
[0028] Figure 8 It is a schematic diagram of the top view of the structure after the horizontal pressure rod of the utility model presses down the push block seat to make the rotating arm rotate clockwise;
[0029] Fig. 9 It is a schematic diagram of the side section structure of the connection between the bottom cylinder, the vertical connecting shaft, the top cylinder, the rotating arm and the pusher seat of the utility model;
[0030] Fig.10 It is a three-dimensional structural diagram of the connection between the hydraulic cylinder, the bracket and the punch head mechanism of the utility model;
[0031] Fig.11 It is a schematic diagram of the three-dimensional structure of the utility model after overall assembly.
[0032] In the figure: 1. stamping table; 101. stamping seat; 102. stamping forming slot; 103. placement slot; 104. positioning column; 105. discharge slot; 106. receiving tray; 2. equipment table; 3. pipeline; 4. pneumatic buffer mechanism; 401. pneumatic cylinder; 402. vertical pressure rod; 403. pneumatic piston; 404. buffer spring; 5. push cleaning mechanism; 501. bottom cylinder; 502. vertical connecting shaft; 503. sealing ring; 504. cleaning brush; 505. rotating arm; 506. arc arm; 507. top cylinder; 508. push block Seat; 509, inclined plane; 510, horizontal plate; 511, limit baffle; 512, arc-shaped limit seat; 513, column; 514, air outlet; 515, annular sealing groove; 516, pusher seat; 517, annular groove; 518, air guide channel; 519, air inlet cavity; 520, horizontal airway; 521, vertical airway; 522, arc-shaped groove; 523, reset spring; 6, hydraulic cylinder; 601, hydraulic rod; 7, bracket; 8, punch head mechanism; 801, punch head; 802, positioning through hole; 803, horizontal arm; 804, horizontal pressure rod. DETAILED DESCRIPTION
[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0034] See also Figure 1-11 The utility model provides a technical solution: a stamping device for aluminum profile processing, comprising a stamping table 1, an equipment table 2 arranged at the rear end of the stamping table 1, a material pushing and cleaning mechanism 5 arranged at the front of the upper end of the equipment table 2, and a hydraulic cylinder 6 installed at the rear end of the upper end of the equipment table 2 through a bracket 7.
[0035] A stamping seat 101 is provided at the upper end of the stamping table 1, a stamping forming slot 102 is provided in the middle of the stamping seat 101, a receiving tray 106 is provided inside the stamping table 1, and the receiving tray 106 is located directly below the stamping forming slot 102. After the stamping head 801 stamps the aluminum profile material on the stamping seat 101, the aluminum profile material is formed into a stamped part through the stamping forming slot 102, and the stamped part can directly fall into the receiving tray 106;
[0036] The side of the stamping table 1 is also provided with a discharge trough 105 connected to the receiving tray 106. When the aluminum profile raw material is stamped, the generated debris and stamped parts fall to the receiving tray 106. When the rotating arm 505 drives the pushing seat 516 to rotate clockwise, the pushing seat 516 pushes the stamped parts through the receiving tray 106 to the discharge trough 105, and the cleaning brush 504 at the bottom of the pushing seat 516 cleans the debris in the receiving tray 106 to the discharge trough 105.
[0037] The punching table 1 is also provided with placement grooves 103 located at the four corners of the punching seat 101, and the placement grooves 103 are provided with air pressure buffer mechanisms 4;
[0038] The pneumatic buffer mechanism 4 includes a pneumatic cylinder 401 arranged in the placement groove 103, a pneumatic piston 403 arranged inside the pneumatic cylinder 401, a buffer spring 404 connected to the lower end of the pneumatic piston 403, and a vertical pressure rod 402 connected to the upper end of the pneumatic piston 403 and extending out of the pneumatic cylinder 401.
[0039] Under the elastic force of the buffer spring 404 on the air piston 403, after the punch head 801 is pressed down to the punch seat 101, when the punch head 801 contacts the top of the vertical pressure rod 402, it can play a buffering role in the downward pressure of the punch head 801, preventing the punch head 801 from pressing down too fast and directly punching the punch seat 101, thereby avoiding the punch seat 101 from being damaged by impact;
[0040] The hydraulic rod 601 at the output end of the hydraulic cylinder 6 passes through the bracket 7 and is connected to a punch head mechanism 8. The punch head mechanism 8 includes a punch head 801 fixed at the lower end of the hydraulic rod 601 and a downward pressing driving member connected to the rear end of the punch head 801.
[0041] The pressing driving member includes a horizontal arm 803 connected to the rear end of the punch head 801 and a horizontal pressing rod 804 fixed to the side of the rear end of the horizontal arm 803;
[0042] The punching table 1 is also provided with positioning posts 104 on the left and right sides of the punching seat 101, and the punching head 801 is provided with positioning through holes 802 matching the positioning posts 104. With such a configuration, after the punching head 801 is pressed down to the punching seat 101, the positioning posts 104 are inserted into the corresponding positioning through holes 802, ensuring the vertical state of the punching head 801 during punching.
[0043] After the punch head 801 is pressed down, the air pressure buffer mechanism 4 realizes the buffering of the downward pressure of the punch head 801, and is also used to blow air into the receiving tray 106 inside the punching table 1 through the material pushing cleaning rod at the front of the material pushing cleaning mechanism 5 to clean the debris. At this time, the downward pressure driving member drives the material pushing cleaning rod to rotate, so that the material pushing cleaning rod pushes the stamped parts and debris in the receiving tray 106 out of the punching table 1;
[0044] The pusher cleaning mechanism 5 comprises a bottom cylinder 501 fixed to the upper end of the equipment table 2, a vertical connecting shaft 502 arranged at the upper end of the bottom cylinder 501, and a top cylinder 507 sleeved on the vertical connecting shaft 502;
[0045] The bottom of the pneumatic cylinder 401 is connected to the air inlet chamber 519 in the bottom tube 501 through the pipe 3, and the top of the air inlet chamber 519 is connected to the air outlet hole 514 opened on the surface of the vertical connecting shaft 502 through the air guide channel 518 inside the vertical connecting shaft 502;
[0046] The vertical connecting shaft 502 is provided with an annular sealing groove 515 located on the upper and lower sides of the air outlet 514, the sealing ring 503 in the annular sealing groove 515 is tightly attached to the inner wall of the top tube 507, and the inner wall of the top tube 507 is also provided with an annular groove 517 located between the upper and lower sealing rings 503, and the height of the air outlet 514 is located in the middle of the annular groove 517.
[0047] With such an arrangement, when the top tube 507 rotates with the vertical connecting shaft 502 as the center, the air in the pneumatic cylinder 401 can still enter the horizontal airway 520 through the pipe 3, the air inlet cavity 519, the air guide channel 518, the air outlet hole 514, and the annular groove 517.
[0048] Moreover, the diameter of the air inlet cavity 519 is larger than the diameter of the air guide channel 518 , so that when the air enters the air guide channel 518 through the air inlet cavity 519 , the air flow rate and air pressure are enhanced, so that the air is ejected with great force through the vertical air channel 521 , and the debris in the receiving tray 106 can be blown out.
[0049] The pusher cleaning rod includes a rotating arm 505 connected to the front side of the top tube 507 and a pusher seat 516 integrally connected to the bottom of the front end of the rotating arm 505. The pusher seat 516 extends into the interior of the punching table 1, and the cleaning brush 504 at the lower end of the pusher seat 516 is located in the receiving tray 106.
[0050] The rotating arm 505 is provided with a horizontal air passage 520 communicating with the annular groove 517 , and the pushing seat 516 is provided with a plurality of groups of vertical air passages 521 communicating with the horizontal air passage 520 , and the bottom of the vertical air passage 521 extends to the lower end surface of the pushing seat 516 .
[0051] The pusher cleaning rod also includes a horizontal plate 510 connected to the side of the top tube 507 and a pusher block seat 508 arranged at the top end of the horizontal plate 510. The horizontal pressure rod 804 is located above the pusher block seat 508. The upper end surface of the pusher block seat 508 is provided with a slope 509 which gradually decreases in height backwards.
[0052] After the punch head 801 moves upward and resets, the reset mechanism on the push cleaning mechanism 5 drives the push cleaning rod to rotate and reset. The reset mechanism includes an arc-shaped arm 506 connected to the side of the rotating arm 505 and an arc-shaped limit seat 512 fixed to the upper end of the equipment table 2 through a column 513, a reset spring 523 is provided in the arc-shaped groove 522 inside one end of the arc-shaped limit seat 512, and a limit baffle 511 is provided at the other end of the arc-shaped limit seat 512, and the arc-shaped arm 506 is inserted into the arc-shaped groove 522.
[0053] Specifically, when in use, the aluminum profile raw material is placed on the stamping seat 101, and the hydraulic rod 601 of the hydraulic cylinder 6 is extended to drive the stamping head 801 to move downward until the stamping head 801 stamps the aluminum profile raw material on the stamping seat 101, so that the aluminum profile raw material is formed into a stamped part through the stamping forming groove 102, and the stamped part can directly fall into the receiving tray 106, and the generated debris also directly falls into the receiving tray 106;
[0054] When the punch head 801 moves downward, the horizontal arm 803 and the horizontal pressure rod 804 also move downward synchronously until the horizontal pressure rod 804 contacts the inclined surface 509 on the push block seat 508, and the horizontal pressure rod 804 moves downward along the inclined surface 509, so that the horizontal pressure rod 804 drives the top cylinder 507 to rotate clockwise through the horizontal plate 510 (such as Figure 8 shown);
[0055] At this time, the top cylinder 507 drives the pusher seat 516 to rotate clockwise through the rotating arm 505, and the pusher seat 516 pushes the stamped parts through the receiving tray 106 to the discharge trough 105, and the cleaning brush 504 at the bottom of the pusher seat 516 cleans the debris in the receiving tray 106 to the discharge trough 105;
[0056] At this time, the arc-shaped arm 506 is further inserted into the arc-shaped groove 522, so that the return spring 523 is in a compressed state;
[0057] After the punch head 801 moves down and presses down the vertical pressure rod 402, the pneumatic piston 403 moves down to compress the air in the pneumatic cylinder 401 (at this time, the buffer spring 404 is in a compressed state), so that the air in the pneumatic cylinder 401 enters the air inlet chamber 519 in the bottom tube 501 through the pipe 3, and then enters the horizontal air channel 520 through the air guide channel 518, the air outlet hole 514, and the annular groove 517 in sequence, and finally the air is ejected to the receiving tray 106 through the bottom of the vertical air channel 521, and the debris in the receiving tray 106 is blown up, so that the cleaning brush 504 can clean the debris in the receiving tray 106 to the discharge trough 105;
[0058] After the punch head 801 is lifted and reset, the punch head 801 is separated from the contact with the vertical pressure rod 402, and the horizontal pressure rod 804 is separated from the contact with the push block seat 508. At this time, under the elastic force of the buffer spring 404, the pneumatic piston 403 and the vertical pressure rod 402 move up and reset. Under the elastic force of the reset spring 523 on the arc arm 506, the arc arm 506 drives the rotating arm 505 and the top cylinder 507 to rotate counterclockwise around the vertical connecting shaft 502 to reset until the rotating arm 505 is close to the limit baffle 511. Figure 5-7 shown.
[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A punching device for aluminum profile processing, comprising a punching table (1), an equipment table (2) arranged at the rear end of the punching table (1), a material pushing and cleaning mechanism (5) arranged at the front end of the upper end of the equipment table (2), and a hydraulic cylinder (6) installed at the rear end of the upper end of the equipment table (2) through a bracket (7), characterized in that: The upper end of the punching platform (1) is provided with a punching seat (101), the middle of the punching seat (101) is provided with a punching forming through groove (102), and the punching platform (1) is also provided with placement grooves (103) located at the four corners of the punching seat (101), and a gas pressure buffer mechanism (4) is provided in the placement groove (103); The hydraulic rod (601) at the output end of the hydraulic cylinder (6) passes through the bracket (7) and is connected to a punching head mechanism (8), wherein the punching head mechanism (8) comprises a punching head (801) fixed at the lower end of the hydraulic rod (601) and a downward pressing driving member connected to the rear end of the punching head (801); After the punch head (801) is pressed down, the air pressure buffer mechanism (4) is used to buffer the downward pressure of the punch head (801) and is also used to blow air into the receiving tray (106) inside the punching table (1) to clean the debris through the pushing cleaning rod at the front of the pushing cleaning mechanism (5). At this time, the downward driving member drives the pushing cleaning rod to rotate, so that the pushing cleaning rod pushes the stamped parts and debris in the receiving tray (106) out of the punching table (1); After the punch head (801) moves upward and resets, the reset mechanism on the push cleaning mechanism (5) drives the push cleaning rod to rotate and reset.
2. A punching device for aluminum profile processing according to claim 1, characterized in that: The punching platform (1) is also provided with positioning columns (104) located on the left and right sides of the punching seat (101), and the punching head (801) is provided with positioning through holes (802) matching the positioning columns (104).
3. A punching device for aluminum profile processing according to claim 1, characterized in that: The pneumatic buffer mechanism (4) comprises a pneumatic cylinder (401) arranged in the placement groove (103), a pneumatic piston (403) arranged inside the pneumatic cylinder (401), a buffer spring (404) connected to the lower end of the pneumatic piston (403), and a vertical pressure rod (402) connected to the upper end of the pneumatic piston (403) and extending out of the pneumatic cylinder (401).
4. A punching device for aluminum profile processing according to claim 3, characterized in that: The material pushing and cleaning mechanism (5) comprises a bottom cylinder (501) fixed to the upper end of the equipment platform (2), a vertical connecting shaft (502) arranged at the upper end of the bottom cylinder (501), and a top cylinder (507) sleeved on the vertical connecting shaft (502); The bottom of the pneumatic cylinder (401) is connected to the air inlet chamber (519) in the bottom tube (501) through a pipe (3), and the top of the air inlet chamber (519) is connected to the air outlet hole (514) provided on the surface of the vertical connecting shaft (502) through an air guide channel (518) inside the vertical connecting shaft (502); The vertical connecting shaft (502) is provided with an annular sealing groove (515) located on the upper and lower sides of the air outlet (514); the sealing ring (503) in the annular sealing groove (515) is tightly attached to the inner wall of the top tube (507); and the inner wall of the top tube (507) is also provided with an annular groove (517) located between the upper and lower sealing rings (503); the height of the air outlet (514) is located in the middle of the annular groove (517).
5. A punching device for aluminum profile processing according to claim 4, characterized in that: The pusher cleaning rod comprises a rotating arm (505) connected to the front side of the top tube (507) and a pusher seat (516) integrally connected to the bottom of the front end of the rotating arm (505); the pusher seat (516) extends into the interior of the punching table (1), and the cleaning brush (504) at the lower end of the pusher seat (516) is located in the receiving tray (106); The rotating arm (505) is provided with a horizontal air passage (520) in communication with the annular groove (517), and the pushing seat (516) is provided with a plurality of groups of vertical air passages (521) in communication with the horizontal air passage (520), and the bottom of the vertical air passages (521) extends to the lower end surface of the pushing seat (516).
6. A punching device for aluminum profile processing according to claim 5, characterized in that: The downward pressing driving member comprises a horizontal arm (803) connected to the rear end of the punch head (801) and a horizontal pressing rod (804) fixed to the side of the rear end of the horizontal arm (803); The pusher cleaning rod also includes a horizontal plate (510) connected to the side of the top tube (507) and a pusher block seat (508) arranged at the top of the end of the horizontal plate (510), a horizontal pressure rod (804) is located above the pusher block seat (508), and the upper end surface of the pusher block seat (508) is provided with an inclined surface (509) whose height gradually decreases backwards.
7. A punching device for aluminum profile processing according to claim 6, characterized in that: The reset mechanism comprises an arc-shaped arm (506) connected to the side of the rotating arm (505) and an arc-shaped limit seat (512) fixed to the upper end of the equipment platform (2) through a column (513); a reset spring (523) is provided in an arc-shaped groove (522) inside one end of the arc-shaped limit seat (512); a limit baffle (511) is provided at the other end of the arc-shaped limit seat (512); and the arc-shaped arm (506) is inserted into the arc-shaped groove (522).
Citation Information
Patent Citations
An aluminium profile stamping die
CN202343707U