Iron sleeve processing mold, iron sleeve manufacturing method and iron sleeve

Abstract

The invention discloses an iron sleeve processing mold, an iron sleeve manufacturing method and an iron sleeve, and belongs to the field of mechanical processing technology. The iron sleeve processing mold includes an upper mold group, a lower mold group, a feeding device, and a progressive device. Three longitudinally continuous forming cavity molds are formed between the upper mold group and the lower mold group, namely, forming cavity mold one, forming cavity mold two, and forming cavity mold three. The cross section of forming cavity one is a straight bar type with a straight middle and curved sides. The cross section of forming cavity mold two is a straight bar type of forming cavity one with the middle part bent into a semicircle. The cross section of forming cavity mold three is a circular ring. The guide groove of the feeding device is fixedly connected to the lower mold base and is horizontally parallel to the forming cavity mold one. The push rod of the progressive device can pass through the forming cavity one and the forming cavity two. After the steel sheet passes through the forming cavity one, the forming cavity two, and the forming cavity three, an iron sleeve is formed. The invention uses the progressive device for stamping and forming, which improves the processing efficiency and the product precision.

Description

Technical Field

[0001] The invention belongs to the technical field of iron sleeve processing, and relates to an iron sleeve production and processing mold and a manufacturing method, and specifically relates to a processing mold for producing an iron sleeve using a progressive die, a method for manufacturing an iron sleeve using the mold, and an iron sleeve processed by the method. Background Art

[0002] At present, in the existing motor core production process, the iron sleeve of the motor center is usually formed by casting. The casting process is complicated, and a certain amount of waste will be generated during the processing. The production cost is too high and the efficiency is low. In order to overcome the existing technical problems, the invention patent with publication number CN106112402A discloses a cold extrusion processing technology for the iron sleeve. Using metal bars as raw materials, after cutting according to the specified size, annealing, shot blasting, phosphorus saponification treatment, cold extrusion shaping, cold heading forming, machining, quenching, tempering, shot blasting, cleaning, and grinding are carried out in sequence to obtain the iron sleeve.

[0003] The above processing technology uses metal bars as raw materials and forms them through cold extrusion. Although it improves production efficiency to a certain extent, reduces manufacturing costs, and has high precision, the processing procedures are complicated and the production efficiency still needs to be improved. Summary of the invention

[0004] In order to overcome the problem of low iron sleeve production efficiency in the motor core production process in the prior art, the present invention provides an iron sleeve processing mold by a progressive die method, which can improve production efficiency and product quality.

[0005] At the same time, the present invention also provides a method for producing an iron sleeve by using the iron sleeve processing mold and the iron sleeve produced by using the method, which can improve production efficiency.

[0006] In order to solve the above technical problems, the present invention provides an iron sleeve processing mold, which includes an upper mold group and a lower mold group. The iron sleeve processing mold also includes a feeding device and a progressive device. Three continuous molding cavity molds are formed between the upper mold group and the lower mold group, namely molding cavity mold one, molding cavity mold two, and molding cavity mold three. The cross-section of molding cavity one is a straight bar type with a flat middle and curved sides. The cross-section of molding cavity mold two is a straight bar type of molding cavity one with the middle part bent into a semicircle. The cross-section of molding cavity mold three is a circular ring. The material guide groove of the feeding device is fixedly connected to the lower mold base and is horizontally parallel to the molding cavity mold one. The push rod of the progressive device can pass through molding cavity one and molding cavity two.

[0007] During the processing, the blanked raw steel sheet is transported to the forming cavity mold 1 through the guide trough of the feeding device, and the upper die group and the lower die group are punched. The raw steel sheet is formed into a middle horizontal shape with both ends bent downward in the forming cavity mold 1. The upper die group is separated from the lower die group, and the push rod of the progressive device is fed by the cylinder. The push rod passes through the forming cavity mold 1 and pushes the steel sheet into the forming cavity mold 2. The push rod is retracted, and the flip plates on both sides of the forming lower mold press the steel sheet. The upper die group and the lower die group are punched twice. In the forming cavity mold 2, the steel sheet is formed into a semicircular shape in the middle, and the horizontal extended ends at both ends of the semicircle are relatively bent inward. The upper die group is separated from the lower die group, and the push rod of the progressive device is fed by the cylinder. The push rod passes through the forming cavity mold 1 and the forming cavity mold 2 to push the steel sheet into the forming cavity mold 3. The push rod is retracted, and the upper die group and the lower die group are punched three times. In the forming cavity mold 3, the steel sheet is formed into a circular iron cylinder with closed ends. This processing method reduces processing costs and improves processing efficiency.

[0008] As a further improvement measure of the present invention, the above-mentioned upper mold group includes an upper mold base and molding upper mold 1, molding upper mold 2, and molding upper mold 3 arranged in parallel and fixed on the upper mold base in sequence; the lower mold group includes a lower mold base and molding lower mold 1, molding lower mold 2, and molding lower mold 3 fixed to the lower mold base; a molding cavity mold 1 is formed between the molding upper mold 1 and the molding lower mold 1, a molding cavity mold 2 is formed between the molding upper mold 2 and the molding lower mold 2, and a molding cavity mold 3 is formed between the molding upper mold 3 and the molding lower mold 2 and the molding lower mold 3.

[0009] As a further improvement measure of the present invention, the above-mentioned upper forming die 1 is in the shape of a rectangular block, the upper surface of the upper forming die 1 is fixedly connected to the upper die seat, and the two short sides of the middle of the lower surface are bent downward into arc shape 1; the outer shape of the lower forming die 1 is in the shape of a rectangular block, the lower surface of the lower forming die is fixedly connected to the lower die seat, and the two short sides of the middle of the upper surface of the lower forming die 1 are bent downward into arc shape 2, and the bending arc of arc shape 1 and arc shape 2 are the same. During the stamping process of the upper die set and the lower die set, the two ends of the steel sheet are bent into arc shape at arc shape 1 and arc shape 2.

[0010] As a further improvement measure of the present invention, the upper surface of the above-mentioned molding upper mold 2 is fixedly connected to the upper mold base, the horizontal middle parts on both sides of the lower surface of the molding upper mold are concave to form a semicircular surface 1, the molding lower mold 2 is rod-shaped, and the molding lower film 2 has three sections, including an upper section, a middle section and a lower section. The middle part of the molding upper mold 1 has a notch, and the upper section of the molding lower mold 2 is inserted into the notch and fixedly connected to the molding lower mold 1. The rod-shaped center of the molding lower mold 2 is parallel to the central axis of the molding lower mold 1 in the same vertical plane, and the section of the molding lower mold 2 opposite to the molding upper mold 2 is the middle section. The cross-section of the middle section is semicircular at the top and square at the bottom, and the semicircular part of the cross-section of the middle section coincides with the center axis of the semicircular surface 1 of the molding upper mold 2.

[0011] As a further improvement measure of the present invention, the upper section of the second forming lower die is inserted into the first forming lower die, ensuring that the axis of the middle section and the lower section of the forming lower die is located at the central axis of the first forming lower die, thereby ensuring the symmetry of the raw steel sheet during the secondary stamping process. The push rod pushes the steel sheet into the second forming cavity die, and the upper die group and the lower die group are stamped. The steel sheet is bent into a semicircular shape in the middle, and the horizontally extended ends at both ends of the semicircle are relatively bent inward.

[0012] The lower section of the second forming lower die is located between the third forming upper die and the third forming lower die. The upper surface of the third forming upper die is fixedly connected to the upper die seat. The horizontal middle parts of the two sides of the lower surface of the forming upper die are concave to form the second arc surface. The lower surface of the third forming lower die is fixedly connected to the lower die seat. The horizontal middle parts of the two sides of the upper surface are concave to form the third arc surface. When the upper die set is aligned with the lower die set, the second arc surface and the third arc surface form a complete circle. The cross section of the lower section of the second forming lower die is circular. The central axis of the lower section of the second forming lower die coincides with the central axis of the third arc surface. The push rod pushes the steel sheet into the third forming cavity die. After the upper die set and the lower die set are stamped, the steel sheet is formed into an iron sleeve.

[0013] The lowest point of the semicircular surface 1 of the above-mentioned forming upper die 2 is higher than the level of the lower surface of the forming upper die, which is convenient for the push rod to push the steel sheet from the forming cavity die 1 into the forming cavity die 2. The semicircular cross section of the middle section of the forming lower die 2 is parallel to the circular cross section of the lower section of the forming lower die 2, which is convenient for the push rod to push the steel sheet from the forming cavity die 2 into the forming cavity die 3. The lower die assembly also includes a limit block, a flip plate, and a bracket. The limit block is fixedly connected to the lower die seat and is clamped on the limit block with the middle section of the forming lower die 2. There are two flip plates and brackets, which are connected to the bracket on both sides of the limit block through spring 2. The flip plate is higher than the forming cavity 1. After the steel sheet is pushed into the forming cavity die 2, in order to ensure the accurate positioning of the steel sheet before stamping, the flip plate presses both sides of the steel sheet to improve the product processing accuracy.

[0014] As a further improvement measure of the present invention, the above-mentioned progressive device includes a cylinder, a push rod fixing seat, and a push rod. The cylinder is fixedly connected to the lower die seat, and the push rod is fixedly connected to the feed end of the cylinder through the push rod fixing seat.

[0015] As a further improvement measure of the present invention, the above-mentioned upper mold group also includes a demolding device, which includes a demolding module, a spring one, and a demolding groove in the middle of the molding upper mold two. The demolding groove is perpendicular to the molding upper mold two, and the demolding module is installed in the demolding groove through a spring one.

[0016] The feeding device includes a conveyor belt, a motor for driving the conveyor belt to rotate, and a guide plate fixedly connected to the lower mold base. The guide plate is provided with a guide groove. The conveyor belt is in the guide groove. The guide groove is horizontally level with the forming cavity mold 1. One end of the guide groove is a feeding port, and the other end is a discharging port. The discharging port is directly opposite to the forming cavity mold 1. The steel sheet falls into the forming cavity mold 1 after being conveyed by the conveyor belt.

[0017] The invention discloses a method for manufacturing an iron sleeve, comprising the following steps:

[0018] Step 1: The steel strip is punched into a rectangular raw steel sheet, which is then transported to the first forming cavity mold through the guide trough of the feeding device;

[0019] Step 2: The upper die set and the lower die set are punched, and the raw steel sheet is formed into a middle horizontal shape with both ends bent downward in the forming cavity die 1;

[0020] Step 3: The upper die set is separated from the lower die set, the push rod of the progressive device is fed by the cylinder, the push rod passes through the forming cavity mold 1 to push the steel sheet into the forming cavity mold 2, and the push rod is retracted;

[0021] Step 4: The turning plates on both sides of the lower forming die press the steel sheet, and the upper die set and the lower die set perform secondary stamping. The steel sheet is formed into a semicircular shape in the middle in the second forming cavity die, and the horizontally extended ends of the two ends of the semicircle are relatively bent inward;

[0022] Step 5: The upper die set is separated from the lower die set, and the push rod of the progressive device is fed by the cylinder. The push rod passes through the forming cavity mold 1 and the forming cavity mold 2, pushes the steel sheet into the forming cavity mold 3, and the push rod is retracted;

[0023] Step 6: The upper die set and the lower die set are punched three times, and the steel sheet is formed into a round iron cylinder with closed ends in the forming cavity die three;

[0024] Step 7: Weld the closed ends of the circular iron tube to form an iron sleeve.

[0025] As a further improvement measure of the present invention, in the iron sleeve manufacturing method, in step 2, after the two ends of the raw steel sheet are bent downward, the end surfaces of the two ends are squeezed so that the end surfaces of the two ends are inclined toward the inner side of the bending surface. In this way, after bending, the end surfaces of the two ends are made flat, so that the welding surfaces are flat against each other, which is convenient for welding.

[0026] The invention also discloses an iron sleeve, which is in a cylindrical shape, has a cross section of a circular ring, and has two end surfaces of a closed annular portion of a side wall of the iron sleeve fitted together, with welding portions provided in the axial direction of the two end surfaces.

[0027] Compared with the prior art, the beneficial effects of the present invention are: 1. By setting an iron sleeve processing mold, three continuous forming cavity molds are formed between the upper mold group and the lower mold group, and simultaneous stamping is performed to improve production efficiency; 2. The present invention adopts a progressive die processing method. During the processing, the raw steel sheet is transported to the forming cavity mold one through the guide trough of the feeding device, and passes through the forming cavity mold two and the forming cavity mold three in turn through the progressive device to form a circular iron cylinder with a middle horizontal shape with both ends bent downward, a semicircular shape in the middle, and horizontal extended ends at both ends of the semicircle relatively bent inward, and closed at both ends. Finally, the iron cylinder gap is welded to produce a finished product. This processing method is formed by stamping steel plates, which greatly saves raw materials. At the same time, progressive die processing improves processing efficiency, reduces processing costs, and improves product production efficiency. Progressive die processing improves the level of automation in product processing and reduces labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a three-dimensional diagram of the upper die set of the iron sleeve processing die of the present invention.

[0029] Figure 2 It is a three-dimensional diagram of the lower die set of the iron sleeve processing die of the present invention.

[0030] Figure 3 It is a perspective view of the iron sleeve processing mold of the present invention.

[0031] Figure 4 for Figure 3 Cross-sectional view along the BB axis.

[0032] Figure 5 It is a top view of the iron sleeve after being formed in step two of the iron sleeve manufacturing method.

[0033] Figure 6 This is a top view of the iron sleeve after being formed in step four of the iron sleeve manufacturing method.

[0034] Figure 7 This is a top view of the iron sleeve after forming.

[0035] Explanation of the accompanying drawings: 1. Upper die assembly; 2. Upper die base; 3. Forming upper die one; 4. Forming upper die two; 5. Forming upper die three; 6. Lower die assembly; 7. Lower die base; 8. Forming lower die one; 9. Forming lower die two; 10. Upper section; 11. Middle section; 12. Lower section; 13. Limit block; 14. Flip plate; 15. Bracket; 16. Forming lower die three; 17. Feeding device; 18. Progressive device; 19. Cylinder; 20. Push rod fixing seat; 21. Push rod; 22. Material guide trough; 23. Forming cavity mold one; 24. Forming cavity mold two; 25. Forming cavity mold three; 26. Demolding device; 27. Demolding module; 28. Demolding groove; 29. ​​Iron sleeve; 30. Spring one. DETAILED DESCRIPTION

[0036] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0037] Figures 1 to 4 The iron sleeve processing mold shown includes an upper mold group 1 and a lower mold group 6. The mold also includes a feeding device 17 and a progressive device 18. The upper mold group 1 includes an upper mold base 2 and a forming upper mold 1 3, a forming upper mold 2 4, and a forming upper mold 3 5 arranged in parallel and fixed on the upper mold base 2 in sequence. The lower mold group 6 includes a lower mold base 7 and a forming lower mold 1 8, a forming lower mold 2 9, and a forming lower mold 3 16 fixed to the lower mold base 7.

[0038] The upper die 3 is in the shape of a rectangular block, and the upper surface of the upper die 3 is fixedly connected to the upper die seat 2. The two short sides of the middle of the lower surface are bent downward to form an arc shape 1. The lower die 8 is in the shape of a rectangular block, and the lower surface of the lower die 8 is fixedly connected to the lower die seat 7. The two short sides of the middle of the upper surface of the lower die 8 are bent downward to form an arc shape 2. The bending arc of the arc shape 1 and the arc shape 2 are the same. During the stamping process of the upper die set 1 and the lower die set 6, the two ends of the steel sheet are bent into the arc shape 1 and the arc shape 2. Figure 5 The forming cavity mold 23 is formed between the forming upper mold 3 and the forming lower mold 8, and the cross section of the forming cavity mold 23 is a straight strip with a straight middle and curved sides. During the stamping process of the upper mold assembly 1 and the lower mold assembly 6, the forming upper mold 3 and the forming lower mold 8 bend the two ends of the steel sheet into an arc at the arc 1 and the arc 2.

[0039] The upper surface of the above-mentioned molding upper die 2 4 is fixedly connected to the upper die seat 2, and the horizontal middle parts of both sides of the lower surface of the molding upper die are concave to form a semicircular surface 1, and the molding lower die 2 9 is rod-shaped. The molding lower film 2 has three sections, including an upper section 10, a middle section 11 and a lower section 12. The middle part of the molding upper die 1 3 has a notch, and the upper section 10 of the molding lower die 2 9 is inserted into the notch and fixedly connected to the molding lower die 1 8. The rod-shaped center of the molding lower die 2 9 is parallel to the central axis of the molding lower die 1 8 in the same vertical plane. The section of the molding lower die 2 9 opposite to the molding upper die 2 4 is the middle section 11, and the cross section of the middle section 11 is semicircular at the upper part and square at the lower part. The semicircular part of the cross section of the middle section 11 coincides with the center axis of the semicircular surface 1 of the molding upper die 2 4. A molding cavity die 2 24 is formed between the molding upper die 2 4 and the molding lower die 2 9. The cross section of the molding cavity die 2 24 is a straight strip type of the molding cavity die 1 23, and the middle part is bent into a semicircle. The upper section 10 of the forming lower die 2 9 is inserted into the forming lower die 1 8, ensuring that the axis of the middle section 11 and the lower section 12 of the forming lower die are located at the central axis of the forming lower die 1 8, ensuring the symmetry of the raw steel sheet during the secondary stamping process, and the push rod pushes the steel sheet into the forming cavity die 2 24, and the upper die set 1 and the lower die set 6 are stamped, such as Figure 6 As shown, the steel sheet is bent into a semicircular shape in the middle, and the horizontally extended ends at both ends of the semicircle are bent inwardly relative to each other.

[0040] The lower section 12 of the forming lower die 29 is located between the forming upper die 3 5 and the forming lower die 3 16. The upper surface of the forming upper die 3 5 is fixedly connected to the upper die seat 2. The horizontal middle parts on both sides of the lower surface of the forming upper die are concave to form arc surface 2. The lower surface of the forming lower die 3 16 is fixedly connected to the lower die seat 7. The horizontal middle parts on both sides of the upper surface are concave to form arc surface 3. When the upper die group 1 and the lower die group 6 are aligned and matched, arc surface 2 and arc surface 3 form a complete circle. The cross-section of the lower section 12 of the forming lower die 29 is circular. The center axis of the lower section 12 of the forming lower die 29 coincides with the center axis of the arc surface 3. A forming cavity mold 3 25 is formed between the forming upper die 3 5 and the forming lower die 2 9 and the forming lower die 3 16. The cross-section of the forming cavity mold 3 25 is a circular ring. The push rod 21 pushes the steel sheet into the forming cavity mold 3 25. After the upper die group 1 and the lower die group 6 are stamped, the steel sheet is formed as follows Figure 7 The annular iron sleeve shown.

[0041] The lowest point of the semicircular surface of the second upper mold 4 is higher than the level of the lower surface of the first upper mold 3, so that the push rod 21 can push the steel sheet from the first mold 23 into the second mold 24. The semicircular cross section of the middle section 11 of the second lower mold 9 is parallel to the circular cross section of the lower section 12 of the second lower mold 9, so that the push rod 21 can push the steel sheet from the second mold 24 into the third mold 25. The lower mold assembly 6 also includes a limit block 13, a flip plate 14, and a bracket 15. The limit block 13 is fixedly connected to the lower mold seat 7, and is clamped on the limit block 13 with the middle section 11 of the second lower mold 9. The flip plate 14 and the bracket 15 are two in number, and are connected to both sides of the limit block 13 through the second spring and the bracket 15. The flip plate 14 is higher than the first mold 23. After the steel sheet is pushed into the second mold 24, in order to ensure the accurate positioning of the steel sheet before stamping, the flip plate 14 presses both sides of the steel sheet to improve the processing accuracy of the product.

[0042] like Figure 4 As shown, the upper mold assembly 1 also includes a demolding device 26, which includes a demolding module 27 and a spring 30. A demolding groove 28 is provided in the middle of the forming upper mold 4, and the demolding groove 28 is perpendicular to the forming upper mold 4. The demolding module 27 is installed in the demolding groove 28 through a spring 30. After being stamped by the forming upper mold 4, when the forming upper mold 4 is reset upward, the stamped semicircular steel sheet is counter-pressed by the demolding module 27, so that the semicircular steel sheet is separated from the forming upper mold 4, thereby preventing the semicircular steel sheet from being stuck in the forming upper mold 4 and affecting the continuous operation of the mold.

[0043] like Figure 2 , Figure 3 , Figure 4As shown, the feeding device 17 includes a conveyor belt, a motor for driving the conveyor belt to rotate, and a guide plate fixedly connected to the lower die seat 7. The guide plate has a guide groove 22. The conveyor belt is in the guide groove 22. The guide groove 22 and the forming cavity mold 23 are arranged horizontally. One end of the guide groove 22 is a feeding port, and the other end is a discharge port. The discharge port is directly opposite to the forming cavity mold 23. After being conveyed by the conveyor belt, the steel sheet falls into the forming cavity mold 23. The guide groove 22 of the feeding device 17 is fixedly connected to the lower die seat 7 and arranged horizontally and parallel to the forming cavity mold 23, so that the raw steel sheet in a rectangular shape formed after punching can be continuously supplied to the forming cavity mold 23, and continuous operation can be achieved to improve production efficiency.

[0044] The progressive device 18 includes a cylinder 19, a push rod fixing seat 20, and a push rod 21. The cylinder 19 is fixedly connected to the lower die seat 7. The push rod 21 is fixedly connected to the feed end of the cylinder 19 through the push rod fixing seat 20. The push rod 21 of the progressive device 18 can pass through the molding cavity mold 1 23 and the molding cavity mold 2 24.

[0045] During the processing, the raw steel sheet is transported to the forming cavity mold 23 through the guide trough 22 of the feeding device 17, and the upper mold group 1 and the lower mold group 6 are punched. The raw steel sheet is formed into a middle horizontal shape with both ends bent downward in the forming cavity mold 23. The raw steel sheet is punched into Figure 5 The upper die set 1 is separated from the lower die set 6, the push rod 21 of the progressive device 18 is fed by the cylinder 19, the push rod 21 passes through the forming cavity die 1 23 to push the steel sheet into the forming cavity die 2 24, the push rod 21 is retracted, and the flip plates 14 on both sides of the forming lower die press the steel sheet, the upper die set 1 and the lower die set 6 are stamped for the second time, and the steel sheet is formed into a semicircular shape in the middle in the forming cavity die 24, and the horizontally extended ends of the two ends of the semicircle are relatively bent inward, and the stamped steel sheet is stamped into the following Figure 6 The upper die set 1 is separated from the lower die set 6, the push rod 21 of the progressive device 18 is fed by the cylinder 19, the push rod 21 passes through the forming cavity die 1 23 and the forming cavity die 2 24, and pushes the steel sheet into the forming cavity die 3 25, the push rod 21 is retracted, the upper die set 1 and the lower die set 6 are stamped three times, and the steel sheet is formed into a circular iron sleeve with closed ends in the forming cavity die 3 25, such as Figure 7 shown.

[0046] The iron sleeve manufacturing method of the iron sleeve processing mold of the present invention is as follows: first, a steel strip is punched to form a rectangular raw steel sheet, which is then transported to a forming cavity mold 23 through a material guide trough 22 of a feeding device 17; an upper mold group 1 and a lower mold group 6 are punched, and the raw steel sheet is formed in the forming cavity mold 23 into a middle horizontal shape with both ends bent downward; after both ends of the raw steel sheet are bent downward, the end faces at both ends are extruded to make the end faces at both ends tilt toward the inner side of the curved surface. Then, the upper die set 1 is separated from the lower die set 6, the push rod 21 of the progressive device 18 is fed by the cylinder 19, the push rod 21 passes through the forming cavity mold 1 23 to push the steel sheet into the forming cavity mold 2 24, and the push rod 21 is retracted; the flip plates 14 on both sides of the forming lower die press the steel sheet, the upper die set 1 and the lower die set 6 are punched twice, and the steel sheet is formed into a middle semicircular shape in the forming cavity mold 24, and the horizontal extended ends of the two ends of the semicircle are relatively bent inward; the upper die set 1 is separated from the lower die set 6, the push rod 21 of the progressive device 18 is fed by the cylinder 19, the push rod 21 passes through the forming cavity mold 1 23 and the forming cavity mold 24, and the steel sheet is pushed into the forming cavity mold 3 25, and the push rod 21 is retracted; the upper die set 1 and the lower die set 6 are punched three times, and the steel sheet is formed into a ring-shaped body with closed ends in the forming cavity mold 3 25; finally, the closed ends of the ring-shaped body are welded to form an iron sleeve, and the welding method can be laser welding or argon arc welding.

[0047] By adopting the progressive die processing technology, during the processing, the raw steel sheet is transported to the forming cavity mold 1 23 through the guide trough 22 of the feeding device 17, and passes through the forming cavity mold 2 24 and the forming cavity mold 3 25 in turn through the progressive device 18, and forms a circular iron cylinder with the middle horizontal ends bent downward, the two ends of the semicircular middle part horizontally extended ends relatively bent inward, and the two ends closed, and finally the iron cylinder gap is welded to produce the finished product. This processing method is formed by iron plate stamping, which greatly saves raw materials. At the same time, the progressive die processing improves the processing efficiency, reduces the processing cost and improves the production efficiency of the product. The use of progressive die processing improves the automation level of product processing and reduces labor costs.

[0048] like Figure 7 As shown, the iron sleeve 29 is a cylindrical body, and the cross section of the iron sleeve 29 is a circular ring. The two end surfaces of the closed part of the annular side wall of the iron sleeve 29 are in contact with each other, and welding parts are provided in the axial direction of the two end surfaces.

[0049] The above describes the embodiments of the present invention in detail in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. For ordinary technicians in this field, several modifications and improvements can be made without departing from the present invention, and these should also be regarded as belonging to the protection scope of the present invention.

Claims

1. An iron sleeve processing mold, comprising an upper mold assembly (1) and a lower mold assembly (6), characterized in that: The iron sleeve processing mold also includes a feeding device (17) and a progressive device (18). Three continuous molding cavities are formed between the upper mold group (1) and the lower mold group (6), namely, molding cavity mold 1 (23), molding cavity mold 2 (24), and molding cavity mold 3 (25). The cross section of the molding cavity mold 1 (23) is a straight strip with a straight middle and curved sides. The cross section of the molding cavity mold 2 (24) is a straight strip with a middle portion bent into a semicircular shape based on the molding cavity mold 1 (23). The cross section of the molding cavity mold 3 (25) is The cross section is a circular ring, the guide groove (22) of the feeding device (17) is fixedly connected to the lower die set (6) and is transversely parallel to the molding cavity die one (23), the push rod (21) of the progressive device (18) can pass through the molding cavity die one (23) and the molding cavity die two (24), the upper die set (1) includes an upper die base (2) and a molding upper die one (3), a molding upper die two (4), and a molding upper die three (5) which are arranged in parallel and fixed on the upper die base (2), and the lower die set (6) includes a lower die base (7) and a molding upper die fixedly connected to the lower die base (7). A molding lower mold 1 (8), a molding lower mold 2 (9), and a molding lower mold 3 (16); a molding cavity mold 1 (23) is formed between the molding upper mold 1 (3) and the molding lower mold 1 (8); a molding cavity mold 2 (24) is formed between the molding upper mold 2 (4) and the molding lower mold 2 (9); a molding cavity mold 3 (25) is formed between the molding upper mold 3 (5) and the molding lower mold 2 (9), and the molding lower mold 3 (16); the molding upper mold 1 (3) is in the shape of a rectangular block; the upper surface of the molding upper mold 1 (3) is fixedly connected to the upper mold base (2) by a water-tight seal at the middle of the lower surface. The two short sides of the flat lower mold (8) are bent downward to form an arc shape, and the outer shape of the lower mold (8) is a rectangular block. The lower surface of the lower mold (8) is fixedly connected to the lower mold base (7). The two short sides of the middle of the upper surface of the lower mold (8) are bent downward to form an arc shape (2). The bending arc of the arc shape (1) and the arc shape (2) are the same. The progressive device (18) includes a cylinder (19), a push rod fixing seat (20), and a push rod (21). The cylinder (19) is fixedly connected to the lower mold base (7), and the push rod (21) is fixedly connected to the feed end of the cylinder (19) through the push rod fixing seat (20).

2. The iron sleeve processing mold according to claim 1, characterized in that: The upper surface of the second molding upper mold (4) is fixedly connected to the upper mold base (2), and the horizontal middle parts of the two sides of the lower surface of the molding upper mold are concave to form a semicircular surface. The second molding lower mold (9) is rod-shaped. The second molding lower mold (9) has three sections, including an upper section (10), a middle section (11) and a lower section (12). The middle part of the first molding upper mold (3) has a notch. The upper section (10) of the second molding lower mold (9) is inserted into the notch and fixedly connected to the first molding lower mold (8). The rod center of the second molding lower mold (9) is parallel to the central axis of the first molding lower mold (8) in the same vertical plane. The section of the second molding lower mold (9) opposite to the second molding upper mold (4) is the middle section (11). The cross section of the middle section (11) is semicircular at the top and square at the bottom. The semicircular part of the cross section of the middle section (11) coincides with the center axis of the semicircular surface of the second molding upper mold (4).

3. The iron sleeve processing mold according to claim 2, characterized in that: The lower section (12) of the second molding lower mold (9) is located between the third molding upper mold (5) and the third molding lower mold (16). The upper surface of the third molding upper mold (5) is fixedly connected to the upper mold seat (2). The horizontal middle portions on both sides of the lower surface of the molding upper mold are concave to form an arcuate surface two. The lower surface of the third molding lower mold (16) is fixedly connected to the lower mold seat (7). The horizontal middle portions on both sides of the upper surface are concave to form an arcuate surface three. When the upper mold assembly (1) and the lower mold assembly (6) are aligned and matched, the arcuate surface two and the arcuate surface three form a complete circle. The cross section of the lower section (12) of the second molding lower mold (9) is circular. The center axis of the lower section (12) of the second molding lower mold (9) coincides with the center axis of the arcuate surface three.

4. The iron sleeve processing mold according to claim 2, characterized in that: The lowest point of the semicircular surface of the second molding upper mold (4) is higher than the horizontal point of the lower surface of the first molding upper mold (3); the semicircular cross section of the middle section (11) of the second molding lower mold (9) is parallel to the circular cross section of the lower section (12) of the second molding lower mold (9); the lower mold assembly (6) also includes a limit block (13), a flip plate (14), and a bracket (15); the limit block (13) is fixedly connected to the lower mold base (7) and is clamped on the limit block (13) with the middle section (11) of the second molding lower mold (9); the flip plate (14) and the bracket (15) are two in number and are connected to both sides of the limit block (13) through a second spring and the bracket (15); the flip plate (14) is higher than the first molding cavity mold (23).

5. The iron sleeve processing mold according to claim 1, characterized in that: The upper mold assembly (1) also includes a demoulding device (26), the demoulding device (26) including a demoulding module (27) and a spring one (30), the middle of the molding upper mold two (4) has a demoulding groove (28), the demoulding groove (28) and the molding upper mold two (4) are perpendicular to each other, and the demoulding module (27) is installed in the demoulding groove (28) through the spring one (30).

6. A method for manufacturing an iron sleeve using the iron sleeve processing mold according to claim 5, characterized in that: The iron sleeve manufacturing method comprises the following steps: Step 1: punching a steel strip into a rectangular raw steel sheet, and conveying the sheet into a forming cavity mold 1 (23) through a material guide trough (22) of a feeding device (17); Step 2: The upper die set (1) and the lower die set (6) are pressed, and the raw steel sheet is formed in the forming cavity die 1 (23) into a middle horizontal shape with both ends bent downward; Step 3: the upper die set (1) is separated from the lower die set (6), the push rod (21) of the progressive device (18) is fed through the cylinder (19), the push rod (21) passes through the forming cavity mold 1 (23) and pushes the steel sheet into the forming cavity mold 2 (24), and the push rod (21) is retracted; Step 4: The turning plates (14) on both sides of the lower forming die press the steel sheet tightly, and the upper die set (1) and the lower die set (6) perform secondary stamping, so that the steel sheet is formed into a semicircular shape in the middle in the second forming cavity die (24), and the horizontally extended ends of the two ends of the semicircle are relatively bent inward; Step 5: The upper die set (1) is separated from the lower die set (6), and the push rod (21) of the progressive device (18) is fed through the cylinder (19). The push rod (21) passes through the forming cavity mold 1 (23) and the forming cavity mold 2 (24), and pushes the steel sheet into the forming cavity mold 3 (25), and the push rod (21) is retracted; Step 6: The upper die set (1) and the lower die set (6) are punched three times, and the steel sheet is formed into a ring-shaped body with two ends closed in the forming cavity die three (25); Step 7: Weld the closed ends of the annular body to form an iron sleeve.

7. The method for manufacturing the iron sleeve according to claim 6, characterized in that: In the step 2, after the two ends of the raw steel sheet are bent downward, the end surfaces at both ends are extruded so that the end surfaces at both ends are inclined toward the inner side of the bending surface.

8. An iron sleeve manufactured by the method for manufacturing an iron sleeve according to claim 6, characterized in that: The iron sleeve is in the shape of a cylinder, and the cross section of the iron sleeve is a circular ring. The two end surfaces of the closed part of the annular side wall of the iron sleeve are fitted together, and welding parts are arranged in the axial direction of the two end surfaces.

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