Automatic punching and blanking device for sewing machine rack production

Abstract

The invention provides an automatic punching and discharging device for sewing machine rack production, belongs to the field of sewing machine rack production, and solves the problems that an existing device cannot perform multi-face punching, punched holes are prone to deformation, feeding and discharging are inconvenient and the like. Comprising an inner die lifting frame, four punching die supports evenly distributed in the circumferential direction, a fixed storage box and a conveyor support, a conveyor is fixed to the conveyor support, an inner die lifting hydraulic rod is arranged on the inner die lifting frame, a positioning inner die assembly is detachably arranged at the telescopic end of the inner die lifting hydraulic rod, and the positioning inner die assembly is located over the fixed storage box. Each punching die support is provided with a punching lifting assembly, each punching lifting assembly is provided with a punching power assembly, and each punching power assembly is detachably provided with a punching die. Feeding and discharging can be stably conveyed, the four punching dies can move up and down and horizontally and cooperate with one another to conduct multi-face punching, internal supporting is provided during punching, punching is stable, deformation of a part to be punched is avoided, and waste collection is facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of sewing machine frame production, and relates to an automatic punching and blanking device, in particular to an automatic punching and blanking device used for sewing machine frame production. Background Art

[0002] During the production and processing of the sewing machine frame, stamping equipment is required to be used for stamping and punching. The raw material of the frame is generally a square tube. Although the existing technology can punch holes in the sewing machine frame, it can only process one surface at a time, which makes its production efficiency low. At the same time, this technology cannot automatically unload the processed sewing machine frame, and the staff still needs to manually remove it, which invisibly increases the labor intensity of the staff. Therefore, according to the above problem, an automatic punching and unloading device for the production of sewing machine frames is provided to solve the above problem.

[0003] After searching, for example, Chinese patent documents disclose an automatic punching and unloading device for intelligent production of sewing machine frames [Application No.: 202311669182.7; Publication No.: CN117960903A]. In this automatic punching and unloading device for intelligent production of sewing machine frames, the limit rod passes through the first shell through the bracket and the through hole, and the limit rod is slidably connected to the first shell through the bracket and the through hole. The swing rod swings to drive the connecting rod to move, thereby driving the limit rod to slide along the through hole processed on the first shell, and the second bevel gear rotates to drive the hollow cylinder to rotate, thereby compressing the spring, so that the push rod slides along the through hole processed on the second shell.

[0004] Although the push rod disclosed in the patent slides along the through hole processed on the second shell to reduce manual labor, the device cannot punch holes on multiple sides, the punched holes are easily deformed, and loading and unloading are inconvenient.

[0005] Therefore, we propose an automatic punching and unloading device for the production of sewing machine frames, which can stabilize the loading and unloading, realize the horizontal movement of four punching dies up and down, cooperate with each other to perform multi-sided punching, provide internal support during punching, stabilize the punching, avoid deformation of the surface of the punched parts, and facilitate the collection of waste. Summary of the invention

[0006] The purpose of the present invention is to address the above-mentioned problems in the existing technology and to propose an automatic punching and unloading device for the production of sewing machine frames. The technical problem to be solved by the invention is: how to realize the automated operations of stable conveying and loading, multi-sided stable punching, stable conveying and unloading, and waste collection of raw materials for frames of sewing machines of different specifications.

[0007] The purpose of the present invention can be achieved by the following technical solutions:

[0008] An automatic punching and unloading device for the production of sewing machine frames, comprising an inner mold lifting frame, four circumferentially evenly distributed punching mold brackets, a fixed storage box and a conveyor bracket, wherein the inner mold lifting frame is located in the middle of the four circumferentially evenly distributed punching mold brackets, the conveyor bracket passes through the inner mold lifting frame, the inner mold lifting frame is located in the middle of the conveyor bracket, four punching mold brackets are symmetrically arranged on both sides of the conveyor bracket in pairs, the fixed storage box is located in the middle position below the conveyor bracket, the conveyor bracket is provided with a conveyor, the inner mold lifting frame is provided with an inner mold lifting hydraulic rod, the telescopic end of the inner mold lifting hydraulic rod is detachably provided with a positioning inner mold assembly, the positioning inner mold assembly is located directly above the fixed storage box, the punching mold brackets are all provided with a punching lifting assembly, the punching lifting assembly is all provided with a punching power assembly, and the punching power assembly is all detachably provided with a punching mold.

[0009] The working principle of the present invention is: according to the size of the original material of the workpiece to be punched on the sewing machine frame, a positioning inner mold assembly of corresponding specifications and a punching mold with different punching shapes are selected, and the workpiece to be punched is vertically placed on the conveyor by a mechanical arm;

[0010] Start the intermittent movement of the conveyor. The conveyor transports the workpiece to be punched to the bottom of the positioning inner mold assembly and then stops moving. The inner mold lifting hydraulic rod drives the positioning inner mold assembly to move downward and insert into the workpiece to be punched. It continues to move downward, passes through the workpiece to be punched, and stops after being inserted into the fixed storage box under the conveyor bracket.

[0011] The four punching lifting assemblies drive the corresponding punching dies and punching power assemblies to move upward to reach the first punching position of the workpiece to be punched, and then the four punching power assemblies drive the corresponding punching dies to move horizontally to contact the four end faces of the workpiece to be punched. One of the punching power assemblies drives the corresponding punching die to perform the punching operation, and the other three punching power assemblies do not work and are used to support the workpiece to be punched. After the punching operation is completed, similarly, the other three punching power assemblies drive the corresponding punching dies to punch in sequence;

[0012] After punching, the four punching power components drive the corresponding punching dies to move horizontally away from the surface of the workpiece to be punched, and the four punching lifting components drive the corresponding punching dies to move upward to the next punching position, and repeat the above punching action;

[0013] Then repeat the downward movement, contact the surface of the workpiece to be punched, punch the hole, leave the surface, and complete all the punching actions;

[0014] When a part of the to-be-punched piece placed on the inner side of the conveyor needs to be punched, the punching power components on the two punching lifting components in the opposite position drive the punching die to contact the to-be-punched piece to complete the clamping work, and the two punching lifting components drive the punching power components and the punching die to move upward, lift the to-be-punched piece for a distance, and leave the conveyor, and the other two punching lifting components drive the punching power components and the punching die to move to the position to be punched, and the punching power components drive the punching die to punch. Similarly, the two punching lifting components drive the punching power components and the punching die to clamp, and the two punching lifting components that have just completed the clamping work drive the punching power components and the punching die to punch, and then put the punched formed piece back on the conveyor;

[0015] Then the punching lifting assembly drives the punching power assembly to reset, the punching power assembly drives the punching die to reset, and the inner die lifting hydraulic rod drives the positioning inner die assembly back to the initial position;

[0016] The conveyor conveys the formed part out and conveys another part to be punched in again, repeating the above operation, regularly cleaning the waste in the fixed storage box, and completing the punching.

[0017] The positioning inner mold assembly includes an inner mold mounting plate, which is detachably arranged below the telescopic end of the inner mold lifting hydraulic rod. Four circumferentially distributed inner mold rods are fixed below the inner mold mounting plate. A cross-shaped punching cavity is formed between the four inner mold rods, and wedge-shaped plugs are provided at the ends of the inner mold rods.

[0018] With the above structure, an inner die rod of corresponding specifications is selected according to the size of the original material of the workpiece to be punched on the sewing machine frame. The inner die mounting plate is detachably arranged below the telescopic end of the inner die lifting hydraulic rod, which is convenient for replacing inner die rods of different specifications and sizes. The inner die rod is inserted into the workpiece to be punched to provide internal support during punching to avoid deformation of the workpiece to be punched. The punching cavity facilitates the dropping of waste materials during punching, and the wedge-shaped plug is convenient for quick insertion into the workpiece to be punched and the interior of the fixed storage box.

[0019] The conveyor comprises two conveying bases, which are fixed on the conveyor bracket, a connecting plate is provided between the two conveying bases, a positioning hole is opened in the middle position of the connecting plate, two vertically arranged conveyor belt drive shafts are rotatably provided on the conveying bases, conveyor belt drive shafts are provided with conveyor belt wheels, a vertical conveyor belt is provided between two corresponding conveyor belt wheels, one of the conveying bases is provided with a conveying motor, the output shaft of the conveying motor is connected to the two conveyor belt drive shafts at the same side, the two conveyor belt drive shafts move synchronously and in opposite directions, a number of square socket bars and supporting plates which are evenly distributed at equal intervals and in opposite positions are provided on the two vertical conveyor belts, the supporting plates are connected under the square socket bars at corresponding positions, and the supporting plates slide and contact above the connecting plates, a right-angle limit plate is detachably provided above the square socket bar, and the right-angle limit plates on the two vertical conveyor belts are opposite to each other.

[0020] With the above structure, according to the size of the raw material to be punched of the sewing machine frame, a right-angle limit plate of corresponding specifications is selected and inserted and installed on the square socket strip;

[0021] Start the conveying motor, place the workpiece to be punched vertically on the right-angle limit plate, and the conveying motor drives the two conveyor belt drive shafts to move in the opposite direction synchronously. The two conveyor belt drive shafts drive the conveyor belt wheels above the corresponding positions to move in the opposite direction synchronously, thereby driving the vertical conveyor belts at the corresponding positions to move in the opposite direction synchronously. The square plug strip, the right-angle limit plate and the supporting plate move synchronously with the vertical conveyor belt to convey the workpiece to be punched, and the workpiece stops when it reaches the positioning hole position.

[0022] The connecting plate is used to connect the conveying bases at both ends, the positioning holes are used to position the inner mold rod and the parts to be punched, and the square socket strips are used to install and replace the right-angle limit plates to meet the needs of parts to be punched of different specifications and sizes. The right-angle limit plates on the vertical conveyor belt cooperate with each other to fix the parts to be punched so that the parts to be punched are placed vertically without tipping or shaking, which facilitates the insertion of the inner mold rod. The support plate supports the bottom of the lower end of the parts to be punched so that the parts to be punched as a whole move synchronously with the vertical conveyor belt. The support plate slides against the top of the connecting plate for stable transportation.

[0023] The punching lifting assembly includes a lifting frame, which is arranged on the punching die bracket. A lifting motor is provided at the upper end of the lifting frame. A lifting transmission shaft is rotatably provided on the lifting frame. The output shaft of the lifting motor is transmission-connected with the lifting transmission shaft. Two symmetrically arranged lifting rails are provided on the lifting frame. Lifting sliders are slidingly provided on the lifting rails. A mounting seat is provided between the two lifting rails. The mounting seat is transmission-connected with the lifting transmission shaft.

[0024] With the above structure, the output shaft of the lifting motor drives the lifting transmission shaft to rotate, the lifting transmission shaft drives the mounting seat to move up and down, the lifting slider slides on the lifting slide rail, and the mounting seat moves up and down stably on the lifting frame.

[0025] The punching power assembly includes a punching die hydraulic rod, which is fixed inside a mounting seat, a punching die mounting block is fixed on the telescopic end of the punching die hydraulic rod, the punching die mounting block slides against the mounting seat, a sliding mounting groove and a punching die engaging groove are provided on the punching die mounting block, and the punching die engaging groove and the sliding mounting groove are connected.

[0026] With the above structure, the sliding installation groove and the punching die engaging groove engage the punching die, so that the punching die will not shake left and right, which is convenient for installing and replacing the punching die. The punching die hydraulic rod drives the punching die mounting block to move stably in the horizontal direction.

[0027] The punching die comprises an upper punching die plate and a lower punching die plate. The upper punching die plate is engaged in a punching die engaging groove and a sliding mounting groove. A punching blade is arranged on the upper punching die plate. A plurality of guide sleeves are arranged between the upper punching die plate and the lower punching die plate. The guide sleeves are provided with reset springs. Two ends of the reset springs respectively abut against the upper punching die plate and the lower punching die plate. A punching hole is provided on the lower punching die plate, and the punching blade slides in the punching hole.

[0028] With the above structure, a punching die of corresponding specifications is selected according to the size of the original material of the workpiece to be punched on the sewing machine frame, and the punching upper template is clamped in the punching die clamping groove and the sliding installation groove, so that the punching die can be easily installed and replaced;

[0029] When punching, the lower punching template contacts the surface of the workpiece to be punched, and the punching die mounting block pushes the upper punching template to move. The upper punching template drives the punching blade to slide in the punching hole, while compressing the guide sleeve and the reset spring, and then extends out of the punching hole to punch the workpiece to be punched. After the punching waste is sent into the punching cavity, the punching die mounting block drives the punching die back to the position before punching, and the punching blade and the guide sleeve return to their original positions under the action of several reset springs, and the guide sleeve ensures that the punching direction remains unchanged.

[0030] The upper end surface of the fixed storage box is provided with an inner mold rod fixing hole, the inner diameter of the inner mold rod fixing hole is the same as the outer size of the inner mold rod, the inner mold rod fixing hole is located directly below the positioning hole, and a storage box drawer is provided inside the fixed storage box.

[0031] With the above structure, the inner mold rod fixing hole on the upper end surface of the storage box fixes the lower end of the inner mold rod, providing a certain stability for the inner mold rod. At the same time, the waste during punching falls from the punching cavity into the storage box drawer, which is convenient for recycling waste.

[0032] Compared with the prior art, the automatic punching and unloading device for sewing machine frame production has the following advantages:

[0033] 1. By placing the parts to be punched on the conveyor, the conveyor fixes the parts to be punched so that the parts to be punched are placed vertically to achieve stable loading and unloading.

[0034] 2. The punching die cooperates with the punching lifting assembly, the punching power assembly and the punching die bracket. The punching lifting assembly drives the punching power assembly and the punching die to move up and down. The punching power assembly drives the punching die to move horizontally to provide punching power, so that the four punching dies cooperate with each other to punch the four end faces of the punched part.

[0035] 3. By positioning the inner mold assembly and fixing the storage box, the inner mold rod fixing hole fixes the lower end of the inner mold rod, providing a certain stability for the inner mold rod. At the same time, the waste during punching falls from the punching cavity into the storage box drawer, which is convenient for recycling waste.

[0036] 4. The positioning inner mold assembly is inserted into the interior of the part to be punched to provide internal support during punching, stabilize the punching, and avoid deformation of the part to be punched. The punching blade enters the punching cavity during punching and sends the punching waste into the punching cavity for easy waste collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0038] Figure 2 It is a top view structural schematic diagram of the present invention

[0039] Figure 3 It is a three-dimensional structural schematic diagram of some components in the present invention.

[0040] Figure 4 It is a structural schematic diagram of the positioning inner mold in the present invention.

[0041] Figure 5 It is a schematic diagram of the disconnection structure of the conveyor in the present invention.

[0042] Figure 6 The present invention Figure 5 Schematic diagram of the local enlarged structure at point A in the middle.

[0043] Figure 7 It is a structural schematic diagram of the punching power component and the punching lifting component in the present invention.

[0044] Figure 8 It is a three-dimensional structural schematic diagram of the punching die in the present invention.

[0045] Fig. 9 It is a structural schematic diagram of a fixed storage box in the present invention.

[0046] In the figure, 1. inner mold lifting frame; 2. inner mold lifting hydraulic rod; 3. punching mold bracket; 4. punching power assembly; 5. conveyor; 6. punching lifting assembly; 7. conveyor bracket; 8. punching mold; 9. fixed storage box; 10. positioning inner mold assembly; 11. inner mold mounting plate; 12. punching cavity; 13. wedge plug; 14. inner mold rod; 15. right angle limit plate; 16. square socket strip; 17. support plate; 18. vertical conveyor belt; 19. conveyor belt drive shaft; 20. conveyor base; 21. Conveyor pulley; 22. Connecting plate; 23. Lifting frame; 24. Mounting seat; 25. Sliding mounting slot; 26. Punching die engaging slot; 27. Punching die mounting block; 28. Punching hydraulic rod; 29. ​​Lifting slider; 30. Punching hole; 31. Punching blade; 32. Punching upper template; 33. Guide sleeve rod; 34. Punching lower template; 35. Inner mold rod fixing hole; 36. Storage box drawer; 37. Reset spring; 38. Positioning hole; 39. Lifting slide rail; 40. Lifting transmission shaft; 41. Lifting motor. DETAILED DESCRIPTION

[0047] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0048] like Figure 1-Figure 9 As shown, the automatic punching and unloading device for the production of sewing machine frames comprises an inner die lifting frame 1, four circumferentially evenly distributed punching die brackets 3, a fixed storage box 9 and a conveyor bracket 7. The inner die lifting frame 1 is located in the middle of the four circumferentially evenly distributed punching die brackets 3, the conveyor bracket 7 passes through the inner die lifting frame 1, the inner die lifting frame 1 is located in the middle of the conveyor bracket 7, the four punching die brackets 3 are symmetrically arranged on both sides of the conveyor bracket 7 in pairs, the fixed storage box 9 is located in the middle position below the conveyor bracket 7, the conveyor bracket 7 is provided with a conveyor 5, the inner die lifting frame 1 is provided with an inner die lifting hydraulic rod 2, the telescopic end of the inner die lifting hydraulic rod 2 is detachably provided with a positioning inner die assembly 10, the positioning inner die assembly 10 is located directly above the fixed storage box 9, the punching die brackets 3 are all provided with a punching lifting assembly 6, the punching lifting assembly 6 is all provided with a punching power assembly 4, and the punching power assembly 4 is all detachably provided with a punching die 8.

[0049] In this embodiment, according to the size of the original material of the workpiece to be punched on the sewing machine frame, the corresponding specification of the positioning inner mold assembly 10 and the punching mold 8 with different punching shapes are selected, and the workpiece to be punched is vertically placed on the conveyor 5 by the mechanical arm;

[0050] The conveyor 5 is started to move intermittently. The conveyor 5 conveys the workpiece to be punched to the bottom of the positioning inner mold assembly 10 and then stops moving. The inner mold lifting hydraulic rod 2 drives the positioning inner mold assembly 10 to move downward and insert into the workpiece to be punched. The inner mold lifting hydraulic rod 2 continues to move downward, passes through the workpiece to be punched, and stops after being inserted into the fixed storage box 9 under the conveyor support 7.

[0051] The four punching lifting assemblies 6 drive the corresponding punching dies 8 and the punching power assemblies 4 to move upward to reach the first punching position of the workpiece to be punched, and then the four punching power assemblies 4 drive the corresponding punching dies 8 to move horizontally to contact the four end faces of the workpiece to be punched. One of the punching power assemblies 4 drives the corresponding punching die 8 to perform the punching operation, and the other three punching power assemblies 4 do not work and are used to support the workpiece to be punched. After the punching operation is completed, similarly, the other three punching power assemblies 4 drive the corresponding punching dies 8 to punch in sequence;

[0052] After punching, the four punching power components 4 drive the corresponding punching dies 8 to move horizontally away from the surface of the workpiece to be punched, and the four punching lifting components 6 drive the corresponding punching dies 8 to move upward to the next punching position, and repeat the above punching action;

[0053] Then repeat the downward movement, contact the surface of the workpiece to be punched, punch the hole, leave the surface, and complete all the punching actions;

[0054] When a part of the to-be-punched piece placed inside the conveyor 5 needs to be punched, the punching power assembly 4 on the two punching lifting assemblies 6 in the opposite position drives the punching die 8 to contact the to-be-punched piece to complete the clamping work, and the two punching lifting assemblies 6 drive the punching power assembly 4 and the punching die 8 to move upward, lift the to-be-punched piece for a distance, and leave the conveyor 5, and the other two punching lifting assemblies 6 drive the punching power assembly 4 and the punching die 8 to move to the position to be punched, and the punching power assembly 4 drives the punching die 8 to punch. Similarly, the two punching lifting assemblies 6 drive the punching power assembly 4 and the punching die 8 to clamp, and the two punching lifting assemblies 6 that have just completed the clamping work drive the punching power assembly 4 and the punching die 8 to punch, and then put the punched formed piece back on the conveyor 5;

[0055] Then the punching lifting assembly 6 drives the punching power assembly 4 to reset, the punching power assembly 4 drives the punching die 8 to reset, and the inner die lifting hydraulic rod 2 drives the positioning inner die assembly 10 to return to the initial position;

[0056] The conveyor 5 conveys the formed piece out and conveys another piece to be punched in again, repeats the above operation, regularly cleans the waste material in the fixed storage box 9, and completes the punching.

[0057] The positioning inner mold assembly 10 includes an inner mold mounting plate 11, which is detachably arranged below the telescopic end of the inner mold lifting hydraulic rod 2. Four circumferentially distributed inner mold rods 14 are fixed below the inner mold mounting plate 11, and a cross-shaped punching cavity 12 is formed between the four inner mold rods 14. The ends of the inner mold rods 14 are provided with wedge-shaped plugs 13.

[0058] In this embodiment, according to the size of the original material of the workpiece to be punched on the sewing machine frame, an inner mold rod 14 of corresponding specifications is selected, and the inner mold mounting plate 11 is detachably arranged below the telescopic end of the inner mold lifting hydraulic rod 2, so as to facilitate the replacement of inner mold rods 14 of different specifications and sizes. The inner mold rod 14 is inserted into the interior of the workpiece to be punched to provide internal support during punching to avoid deformation of the workpiece to be punched. The punching cavity 12 facilitates the dropping of waste materials during punching, and the wedge-shaped plug 13 facilitates and quickly inserts the workpiece to be punched and the interior of the fixed storage box 9.

[0059] The conveyor 5 includes two conveyor bases 20, the two conveyor bases 20 are fixed on the conveyor support 7, a connecting plate 22 is provided between the two conveyor bases 20, a positioning hole 38 is provided in the middle of the connecting plate 22, two vertically arranged conveyor belt drive shafts 19 are rotatably provided on the conveyor bases 20, a conveyor belt drive shaft 19 is provided with a conveyor belt wheel 21, a vertical conveyor belt 18 is provided between the two corresponding conveyor belt wheels 21, a conveyor motor is provided on one of the conveyor bases 20, and the output shaft of the conveyor motor is connected to the conveyor belt drive shaft 19. Two conveyor belt drive shafts 19 at the same side are connected for transmission, and the two conveyor belt drive shafts 19 move synchronously and in opposite directions. The two vertical conveyor belts 18 are provided with a number of square socket strips 16 and supporting plates 17 that are evenly distributed and in equal number and in opposite positions. The supporting plates 17 are connected under the square socket strips 16 at the corresponding positions, and the supporting plates 17 slide and abut against the top of the connecting plate 22. A detachable right-angle limit plate 15 is provided above the square socket strips 16, and the right-angle limit plates 15 on the two vertical conveyor belts 18 are in opposite positions.

[0060] In this embodiment, according to the size of the raw material to be punched of the sewing machine frame, a right-angle stopper plate 15 of corresponding specifications is selected and inserted and installed on the square plug-in strip 16;

[0061] Start the conveying motor, and place the workpiece to be punched vertically on the right-angle limit plate 15. The conveying motor drives the two conveyor belt drive shafts 19 to move in the opposite direction synchronously. The two conveyor belt drive shafts 19 drive the conveyor belt wheels 21 above the corresponding positions to move in the opposite direction synchronously, thereby driving the vertical conveyor belt 18 at the corresponding position to move in the opposite direction synchronously. The square plug strip 16, the right-angle limit plate 15 and the supporting plate 17 move synchronously with the vertical conveyor belt 18 to convey the workpiece to be punched, and the workpiece stops when it reaches the position of the positioning hole 38.

[0062] The connecting plate 22 is used to connect the conveying base 20 at both ends, the positioning hole 38 is used to position the inner mold rod 14 and the workpiece to be punched, and the square socket strip 16 is used to install and replace the right-angle limit plate 15 to meet the needs of workpieces to be punched of different specifications and sizes. The right-angle limit plates 15 on the vertical conveyor belt 18 cooperate with each other to fix the workpiece to be punched so that the workpiece to be punched is placed vertically without tipping or shaking, which facilitates the insertion of the inner mold rod 14. The supporting plate 17 supports the bottom of the lower end of the workpiece to be punched so that the workpiece to be punched as a whole moves synchronously with the vertical conveyor belt 18, and the supporting plate 17 slides against the top of the connecting plate 22 for stable transportation.

[0063] The punching lifting assembly 6 includes a lifting frame 23, which is arranged on the punching die bracket 3. A lifting motor 41 is provided at the upper end of the lifting frame 23. A lifting transmission shaft 40 is rotatably provided on the lifting frame 23. The output shaft of the lifting motor 41 is transmission-connected with the lifting transmission shaft 40. Two symmetrically arranged lifting rails 39 are provided on the lifting frame 23. Lifting sliders 29 are slidingly provided on the lifting rails 39. A mounting seat 24 is provided between the two lifting rails 39. The mounting seat 24 is transmission-connected with the lifting transmission shaft 40.

[0064] In this embodiment, the output shaft of the lifting motor 41 drives the lifting transmission shaft 40 to rotate, and the lifting transmission shaft 40 drives the mounting seat 24 to move up and down. The lifting slider 29 slides on the lifting slide rail 39, so that the mounting seat 24 can move up and down stably on the lifting frame 23.

[0065] The punching power assembly 4 includes a punching die hydraulic rod 28, which is fixed inside the mounting seat 24. A punching die mounting block 27 is fixed on the telescopic end of the punching die hydraulic rod 28. The punching die mounting block 27 slides against the mounting seat 24. A sliding mounting groove 25 and a punching die engaging groove 26 are provided on the punching die mounting block 27. The punching die engaging groove 26 and the sliding mounting groove 25 are connected.

[0066] In this embodiment, the sliding installation groove 25 and the punching die engaging groove 26 engage the punching die 8, so that the punching die 8 will not shake left and right, making it easy to install and replace the punching die 8. The punching die hydraulic rod 28 drives the punching die mounting block 27 to move stably in the horizontal direction.

[0067] The punching die 8 includes an upper punching die plate 32 and a lower punching die plate 34. The upper punching die plate 32 is engaged in the punching die engaging groove 26 and the sliding mounting groove 25. A punching blade 31 is provided on the upper punching die plate 32. A plurality of guide sleeves 33 are provided between the upper punching die plate 32 and the lower punching die plate 34. The guide sleeves 33 are provided with reset springs 37. Both ends of the reset springs 37 respectively abut against the upper punching die plate 32 and the lower punching die plate 34. A punching hole 30 is provided on the lower punching die plate 34. The punching blade 31 slides in the punching hole 30.

[0068] In this embodiment, according to the size of the original material to be punched of the sewing machine frame, a punching die 8 of corresponding specifications is selected, and the punching upper template 32 is engaged with the punching die engagement groove 26 and the sliding installation groove 25, so as to facilitate the installation and replacement of the punching die 8;

[0069] When punching, the lower punching template 34 contacts the surface of the workpiece to be punched, and the punching die mounting block 27 pushes the upper punching template 32 to move. The upper punching template 32 drives the punching blade 31 to slide in the punching hole 30, while compressing the guide sleeve 33 and the return spring 37, and then extends out of the punching hole 30 to punch the workpiece to be punched. After the punching waste is sent into the punching cavity 12, the punching die mounting block 27 drives the punching die 8 back to the position before punching, and the punching blade 31 and the guide sleeve 33 return to their original positions under the action of a number of return springs 37, and the guide sleeve 33 ensures that the punching direction remains unchanged.

[0070] An inner mold rod fixing hole 35 is opened on the upper end surface of the fixed storage box 9. The inner diameter of the inner mold rod fixing hole 35 is the same as the outer size of the inner mold rod 14. The inner mold rod fixing hole 35 is located directly below the positioning hole 38. A storage box drawer 36 is provided inside the fixed storage box 9.

[0071] In this embodiment, the inner mold rod fixing hole 35 on the upper end surface of the storage box 9 fixes the lower end of the inner mold rod 14, providing a certain stability for the inner mold rod 14. At the same time, the waste material during punching falls from the punching cavity 12 into the storage box drawer 36, which is convenient for recycling waste material.

[0072] The working principle of the present invention is as follows: according to the size of the original material of the workpiece to be punched on the sewing machine frame, the inner mold rod 14 of the corresponding specification is selected, the inner mold mounting plate 11 is detachably arranged below the telescopic end of the inner mold lifting hydraulic rod 2, the right-angle limit plate 15 of the corresponding specification is selected and inserted and installed on the square plug-in strip 16, the punching die 8 of the corresponding specification is selected, and the punching upper template 32 is clamped in the punching die clamping groove 26 and the sliding mounting groove 25;

[0073] The conveying motor is started to perform intermittent motion, and the pieces to be punched are placed vertically on the right-angle limit plate 15 in sequence through the mechanical arm. The conveying motor drives the two conveyor belt drive shafts 19 to move in the opposite direction synchronously, and the two conveyor belt drive shafts 19 drive the conveyor belt wheels 21 above the corresponding positions to move in the opposite direction synchronously, thereby driving the vertical conveyor belt 18 at the corresponding position to move in the opposite direction synchronously. The square plug strip 16, the right-angle limit plate 15 and the supporting plate 17 move synchronously with the vertical conveyor belt 18 to convey the pieces to be punched, and the pieces to be punched stop when they reach the position of the positioning hole 38, and the movement is suspended after the pieces to be punched are conveyed to the position directly below the inner mold rod 14;

[0074] The inner mold lifting hydraulic rod 2 drives the inner mold mounting plate 11 and thus drives the inner mold rod 14 to move downward and insert into the workpiece to be punched, and then continues to move downward, passes through the workpiece to be punched, and is inserted into the inner mold rod fixing hole 35 on the upper end surface of the fixed storage box 9 under the conveyor support 7 and stops;

[0075] The four punching lifting assemblies 6 drive the corresponding punching power assemblies 4 and the punching die 8 to move upward, that is, the four lifting motors 41 are started, the output shafts of the four lifting motors 41 drive the corresponding lifting transmission shafts 40 to rotate, the four lifting transmission shafts 40 drive the corresponding mounting seats 24 to move upward, the four mounting seats 24 move upward to drive the punching die 8, the punching die hydraulic rod 28 and the punching die mounting block 27, the four punching dies 8 reach the first punching position of the part to be punched, and then the four punching power assemblies 4 drive the corresponding punching die 8 to move horizontally, that is, the horizontal movement of the punching die hydraulic rod 28 drives the horizontal movement of the punching die mounting block 27, and the horizontal movement of the punching die mounting block 27 drives the punching die 8 to move horizontally;

[0076] The punching lower templates 34 on the four punching dies 8 are in contact with the four end faces of the workpiece to be punched, and one of the punching dies 8 performs a punching operation, that is, the punching die hydraulic rod 28 moves horizontally to drive the punching die mounting block 27 to continue to move horizontally, and the punching die mounting block 27 pushes the punching upper template 32 to move, and the punching upper template 32 drives the punching blade 31 to slide in the punching hole 30, and at the same time compresses the guide sleeve rod 33 and the reset spring 37, and then extends out of the punching hole 30 to punch the workpiece to be punched, and the punching waste is sent into the punching cavity 12, and the punching waste falls from the punching cavity 12 into the storage box drawer 36 inside the fixed storage box 9, and then the punching die mounting block 27 drives the punching die 8 back to the position before punching, and the punching blade 31 and the guide sleeve rod 33 return to their original positions under the action of a number of reset springs 37;

[0077] The other three punching power assemblies 4 do not work and are used to support the workpiece to be punched. After the punching operation is completed, the other three punching power assemblies 4 drive the corresponding punching dies 8 to punch holes in sequence in the same way;

[0078] After punching, the four punching power components 4 drive the corresponding punching dies 8 to move horizontally away from the surface of the workpiece to be punched, and the four punching lifting components 6 drive the corresponding punching dies 8 to move upward to the next punching position, and repeat the above punching action;

[0079] Then repeat the downward movement, contact the surface of the workpiece to be punched, punch the hole, leave the surface, and complete all the punching actions;

[0080] When a part of the to-be-punched piece placed inside the conveyor 5 needs to be punched, the punching power assembly 4 on the two punching lifting assemblies 6 in the opposite position drives the punching die 8 to contact the to-be-punched piece to complete the clamping work, and the two punching lifting assemblies 6 drive the punching power assembly 4 and the punching die 8 to move upward, lift the to-be-punched piece for a distance, and leave the conveyor 5, and the other two punching lifting assemblies 6 drive the punching power assembly 4 and the punching die 8 to move to the position to be punched, and the punching power assembly 4 drives the punching die 8 to punch. Similarly, the two punching lifting assemblies 6 drive the punching power assembly 4 and the punching die 8 to clamp, and the two punching lifting assemblies 6 that have just completed the clamping work drive the punching power assembly 4 and the punching die 8 to punch, and then put the punched formed piece back on the conveyor 5;

[0081] Then the punching lifting assembly 6 drives the punching power assembly 4 to reset, the punching power assembly 4 drives the punching die 8 to reset, and the inner die lifting hydraulic rod 2 drives the inner die mounting plate 11 and the inner die rod 14 back to the initial position;

[0082] The conveyor 5 conveys the formed piece out and conveys another piece to be punched in again, repeats the above operation, regularly cleans the waste in the storage box drawer 36, and completes the punching.

[0083] In summary, by placing the workpiece to be punched on the conveyor 5, the conveyor 5 fixes the workpiece to be punched so that the workpiece to be punched is placed vertically, thereby achieving stable loading and unloading;

[0084] The punching die 8 cooperates with the punching lifting assembly 6, the punching power assembly 4 and the punching die bracket 3. The punching lifting assembly 6 drives the punching power assembly 4 and the punching die 8 to move up and down, and the punching power assembly 4 drives the punching die 8 to move horizontally to provide punching power, so that the four punching dies 8 cooperate with each other to punch the four end faces of the punched part.

[0085] By positioning the inner mold assembly 10 and cooperating with the fixed storage box 9, the inner mold rod fixing hole 35 fixes the lower end of the inner mold rod 14, providing a certain stability for the inner mold rod 14, and at the same time, the waste material during punching falls from the punching cavity 12 into the storage box drawer 36, which is convenient for recycling the waste material;

[0086] The positioning inner mold assembly 10 is inserted into the interior of the part to be punched to provide internal support during punching, stabilize the punching, and avoid deformation of the part to be punched. The punching blade 31 enters the punching cavity 12 during punching and sends the punching waste into the punching cavity 12 to facilitate waste collection.

[0087] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An automatic punching and unloading device for sewing machine frame production, comprising an inner mold lifting frame (1), four circumferentially evenly distributed punching mold brackets (3), a fixed storage box (9) and a conveyor bracket (7), characterized in that: The inner mold lifting frame (1) is located in the middle of four circumferentially evenly distributed punching mold supports (3); the conveyor support (7) passes through the inner mold lifting frame (1); the inner mold lifting frame (1) is located in the middle of the conveyor support (7); the four punching mold supports (3) are symmetrically arranged on both sides of the conveyor support (7); the fixed storage box (9) is located in the middle below the conveyor support (7); the conveyor support (7) is provided with a conveyor (5); the inner mold lifting frame (1) is provided with an inner mold lifting hydraulic rod (2); the telescopic end of the inner mold lifting hydraulic rod (2) is detachably provided with a positioning inner mold assembly (10); the positioning inner mold assembly (10) is located directly above the fixed storage box (9); the punching mold supports (3) are all provided with a punching lifting assembly (6); the punching lifting assembly (6) is all provided with a punching power assembly (4); and the punching power assembly (4) is all detachably provided with a punching mold (8).

2. The automatic punching and feeding device for sewing machine frame production according to claim 1, characterized in that: The positioning inner mold assembly (10) comprises an inner mold mounting plate (11), which is detachably arranged below the telescopic end of the inner mold lifting hydraulic rod (2), and four circumferentially distributed inner mold rods (14) are fixed below the inner mold mounting plate (11), a cross-shaped punching cavity (12) is formed between the four inner mold rods (14), and the ends of the inner mold rods (14) are each provided with a wedge-shaped plug (13).

3. The automatic punching and feeding device for sewing machine frame production according to claim 2, characterized in that: The conveyor (5) comprises two conveyor bases (20), the two conveyor bases (20) are fixed on the conveyor support (7), a connecting plate (22) is provided between the two conveyor bases (20), a positioning hole (38) is provided in the middle of the connecting plate (22), two vertically arranged conveyor belt transmission shafts (19) are rotatably provided on the conveyor bases (20), a conveyor belt transmission shaft (19) is provided with a conveyor belt wheel (21), a vertical conveyor belt (18) is provided between the two corresponding conveyor belt wheels (21), one of the conveyor bases (20) is provided with a conveying motor, and the conveying motor is provided with a transmission shaft (21). The output shaft is connected to two conveyor belt drive shafts (19) at the same side, and the two conveyor belt drive shafts (19) move synchronously and in opposite directions. The two vertical conveyor belts (18) are provided with a plurality of square socket bars (16) and supporting plates (17) which are evenly distributed and in equal numbers and facing each other. The supporting plates (17) are connected below the square socket bars (16) at corresponding positions, and the supporting plates (17) are slidably abutted against the top of the connecting plate (22). A right-angled stop plate (15) is detachably provided above the square socket bars (16), and the right-angled stop plates (15) on the two vertical conveyor belts (18) are facing each other.

4. The automatic punching and feeding device for sewing machine frame production according to claim 3 is characterized in that: The punching lifting assembly (6) comprises a lifting frame (23), the lifting frame (23) is arranged on the punching die bracket (3), a lifting motor (41) is arranged at the upper end of the lifting frame (23), a lifting transmission shaft (40) is rotatably arranged on the lifting frame (23), the output shaft of the lifting motor (41) is drivingly connected to the lifting transmission shaft (40), two symmetrically arranged lifting rails (39) are arranged on the lifting frame (23), lifting sliders (29) are slidably arranged on the lifting rails (39), a mounting seat (24) is arranged between the two lifting rails (39), and the mounting seat (24) is drivingly connected to the lifting transmission shaft (40).

5. The automatic punching and feeding device for sewing machine frame production according to claim 4, characterized in that: The punching power assembly (4) comprises a punching die hydraulic rod (28), the punching die hydraulic rod (28) is fixed inside the mounting seat (24), a punching die mounting block (27) is fixed on the telescopic end of the punching die hydraulic rod (28), the punching die mounting block (27) is slidably abutted on the mounting seat (24), a sliding mounting groove (25) and a punching die engaging groove (26) are provided on the punching die mounting block (27), and the punching die engaging groove (26) and the sliding mounting groove (25) are connected.

6. The automatic punching and feeding device for sewing machine frame production according to claim 5, characterized in that: The punching die (8) comprises an upper punching die plate (32) and a lower punching die plate (34). The upper punching die plate (32) is engaged with the inside of the punching die engaging groove (26) and the sliding installation groove (25). A punching blade (31) is provided on the upper punching die plate (32). A plurality of guide sleeves (33) are provided between the upper punching die plate (32) and the lower punching die plate (34). The guide sleeves (33) are provided with a return spring (37). The two ends of the return spring (37) respectively contact the upper punching die plate (32) and the lower punching die plate (34). A punching hole (30) is provided on the lower punching die plate (34), and the punching blade (31) slides in the punching hole (30).

7. The automatic punching and feeding device for sewing machine frame production according to claim 6, characterized in that: The upper end surface of the fixed storage box (9) is provided with an inner mold rod fixing hole (35), the inner diameter of the inner mold rod fixing hole (35) is the same as the outer size of the inner mold rod (14), the inner mold rod fixing hole (35) is located directly below the positioning hole (38), and a storage box drawer (36) is provided inside the fixed storage box (9).

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