Slanted insertion automatic film sorting and expanding machine for machining small film spacing products.

Abstract

This utility model relates to the technical field of oblique insertion automatic sheet expansion machine, and in particular to a mold and pressing mechanism for small-pitch products in an oblique insertion automatic sheet expansion machine. The mold and pressing mechanism for small-pitch products in an oblique insertion automatic sheet expansion machine includes a mold assembly and a pressing mechanism. The mold assembly includes a mounting base plate and several sheet-shaped molds arranged side-by-side, with equal spacing between adjacent molds. Each sheet-shaped mold has an inserting tooth portion and a connecting portion. The inserting tooth portion consists of multiple parallel-arranged first inserts, and the connecting portion is a top notch cavity. The pressing mechanism includes a cantilever, a cylinder, and a pressure plate assembly. Below the pressure plate assembly is a mold reinforcing plate corresponding to the sheet-shaped molds. Its second inserts engage with the inserting tooth portion, and the snap teeth engage with the notch cavity. This structure effectively enhances mold rigidity through dual positioning, preventing deformation during small-pitch production, while also facilitating rapid mold changeover, making it suitable for precision expansion processing of small-pitch products.

Description

Technical Field

[0001] This utility model relates to the technical field of oblique insertion automatic sheet expansion machine, and in particular to a processing tooling for small sheet spacing products of oblique insertion automatic sheet expansion machine. Background Technology

[0002] Traditional mold and pressing mechanisms in oblique insertion automatic finning and tube expanding machines are mainly suitable for the production of finned products with standard fin pitches of 4mm and 5mm. When applied to products with smaller fin pitches of 3mm and below, the radial stress on the mold insert teeth increases significantly during the tube expanding process due to the reduced fin pitch, causing plastic deformation in the fin area. This deformation results in the inability to elastically recover, affecting the accuracy of repeated use. Furthermore, the traditional pressing mechanism uses a single pressure plate structure, which cannot adapt to the rapid switching between molds with different fin pitches. The entire mold assembly needs to be replaced, leading to low changeover efficiency and increased production costs. Utility Model Content

[0003] The technical problem to be solved by this utility model is: in order to solve the problems in the prior art mentioned above, such as the easy plastic deformation of the mold during small-particle-particle production and the inability to recover, and the difficulty of changing the mold due to the single pressing mechanism, a processing tooling for small-particle-particle products of the inclined insertion automatic tablet expansion machine is provided. Through the composite fixing method of insertion and snap-fit, the mold can elastically recover after expansion.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a processing tooling for small-particle-gap products of an oblique insertion automatic sheet expansion machine, including a mold assembly and a pressing mechanism. The mold assembly includes a mounting base plate and several sheet-shaped molds arranged side by side on the mounting base plate. The spacing between adjacent sheet-shaped molds is equal. Each sheet-shaped mold is provided with an inserting tooth part and a connecting part. The inserting tooth part is composed of multiple parallel first inserts. The connecting part is a notch cavity opened on the top of the sheet-shaped mold. The tablet pressing mechanism includes a cantilever, a cylinder, and a pressure plate assembly. The cylinder is mounted on the upper surface of the cantilever, and its push rod passes downward through the cantilever and connects to the pressure plate assembly. At least two guide rods are provided between the cantilever and the pressure plate assembly. The lower surface of the pressure plate assembly is provided with mold reinforcing plates in the same number as the sheet mold. The mold reinforcing plates have second inserts that engage with the insert teeth and snap teeth that engage with the notch cavity.

[0005] The mounting base provides rigid support, ensuring the parallelism and spacing accuracy of the sheet molds and preventing deformation caused by uneven stress. The sheet molds adopt a split design, facilitating the individual replacement of damaged molds and reducing maintenance costs. The insert teeth are used to precisely position the fins, ensuring the alignment accuracy between the tube and fins during tube expansion and reducing the risk of misalignment. The connecting part engages with the snap teeth of the pressing mechanism, enhancing the stability of the mold during tube expansion and preventing displacement. The cantilever, cylinder, and guide rod together provide stable vertical force, ensuring no swaying when the pressure plate assembly is pressed down, improving tube expansion consistency. The mold reinforcement plate forms a double fixation through the insertion of the second insert and the snap teeth engaging with the notch cavity, significantly enhancing the mold's resistance to deformation, especially suitable for high-stress conditions with small sheet pitches below 3mm. The split-type reinforcement design of the pressing mechanism can adapt to rapid mold changes with different sheet pitches, improving production efficiency.

[0006] According to one embodiment of the present invention, the sheet mold is fixed to the mounting base plate by bolts, and the upper end of the first insert is thinned to form a first pointed head; the mold reinforcing plate is fixed to the lower surface of the pressure plate assembly by bolts, and the lower end of the second insert is thinned to form a second pointed head.

[0007] The first pointed tip reduces the contact area between the insert and the fin, lowers frictional resistance, facilitates tube insertion, and avoids scratching the fin surface. The second pointed tip makes it easier for the mold reinforcement plate to be inserted into the insert teeth, improving assembly efficiency and ensuring tightness of the insertion. Bolt fixing facilitates quick disassembly and replacement, adapting to the needs of multi-specification production. The pointed tip design reduces insertion resistance and protects the integrity of the fin, making it especially suitable for the production of small-pitch ultra-thin fins.

[0008] According to one embodiment of the present invention, the mold assembly is mounted on a movable platform, the movable platform having an I-shaped structure, and limiting baffles at both ends for limiting the displacement of the mounting base plate.

[0009] The I-shaped movable platform and limiting baffles ensure that the mounting base plate is precisely limited in the horizontal direction, preventing the mold components from shifting during the tube expansion process.

[0010] According to one embodiment of the present invention, the lower surface of the movable platform is connected to a slider and a lead screw nut mounting seat, and a lead screw nut is installed in the lead screw nut mounting seat.

[0011] According to one embodiment of the present invention, the mounting base plate is provided with a mounting groove for a sheet-like mold, and the bottom of the sheet-like mold is embedded in the mounting groove.

[0012] The mounting groove forms an embedded positioning on the bottom of the sheet mold, preventing the mold from shifting laterally under high pressure and ensuring consistent sheet spacing; it eliminates product defect rates caused by mold displacement, and is especially suitable for high-precision production with small sheet spacing.

[0013] According to one embodiment of the present invention, the cantilever has an inverted L-shaped structure, including a vertical part and a horizontal part. The cylinder is mounted on the upper surface of the horizontal part, the upper end of the guide rod passes through the horizontal part, and a linear bearing is provided between the guide rod and the horizontal part. A spacer is sleeved on the outside of the linear bearing.

[0014] The rigid structure of the cantilever combined with the low-friction motion of the linear bearing ensures that the pressure plate assembly can be pressed down vertically without wobbling.

[0015] According to one embodiment of the present invention, the pressure plate assembly includes a pressure plate and a transition plate. The transition plate is connected above the pressure plate. The lower end of the guide rod is connected to the transition plate through a fixed seat. The end of the cylinder push rod is connected to the transition plate through a cylinder flange. The mold reinforcing plate is connected to the bottom surface of the pressure plate.

[0016] The transition plate and cylinder flange disperse the cylinder thrust, avoid local stress concentration on the pressure plate, and extend the service life of the mechanism.

[0017] According to one embodiment of the present invention, a demolding assembly is also included. The demolding assembly includes two parallel demolding base plates. Each demolding base plate has a mounting plate connected to both ends by bolts. The demolding base plates have slots for the sheet-like mold to pass through.

[0018] After the tube expansion is completed, the product is lifted up to avoid mold damage caused by manual prying, which is especially suitable for easily deformable aluminum alloy fins.

[0019] The beneficial effects of this utility model are as follows: the multi-positioning structure of plug-in, snap-in and guide rod ensures the expansion accuracy of small-pitch products and meets the manufacturing requirements of precision products; the composite structure of mold reinforcing plate and sheet mold improves mold rigidity and effectively avoids plastic deformation; the modular mold components and adjustable moving table greatly shorten the mold changeover time and significantly improve production efficiency. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 This is a schematic diagram of the installation structure of the movable platform and module components in this utility model.

[0023] Figure 3 This is a schematic diagram of the structure of the movable platform in this utility model.

[0024] Figure 4 This is a schematic diagram of the mold assembly in this utility model.

[0025] Figure 5 yes Figure 4 A schematic diagram of the structure of a medium-sized sheet mold.

[0026] Figure 6 This is a schematic diagram of the tablet pressing mechanism in this utility model.

[0027] Figure 7 yes Figure 6 A schematic diagram of the structure of the middle mold reinforcing block.

[0028] Figure 8 This is a schematic diagram of the demolding component in this utility model.

[0029] In the diagram: 1. Mold assembly; 11. Mounting base plate; 111. Mounting groove; 112. Lower limit block; 12. Sheet mold; 121. Toothed part; 1211. First insert piece; 12111. First pointed head; 122. Connecting part; 2. Pressing mechanism; 21. Cantilever; 211. Vertical part; 212. Horizontal part; 22. Cylinder; 23. Pressing plate assembly; 231. Pressing plate; 2311. Upper limit block; 232 1. Transition plate; 24. Guide rod; 25. Linear bearing; 26. Spacer; 27. Fixed seat; 28. Cylinder flange; 29. ​​Mold reinforcing plate; 291. Second insert; 2911. Second pointed head; 292. Fastening tooth; 3. Moving table; 31. Limiting stop; 32. Slider; 33. Screw nut mounting seat; 34. Screw nut; 4. Demolding assembly; 41. Demolding base plate; 411. Slot; 42. Mounting plate. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0031] like Figure 1 As shown, a processing fixture for small-particle-gap products in an oblique insertion automatic tablet expansion machine includes a mold assembly 1, a tablet pressing mechanism 2, and a demolding assembly 4. The mold assembly 1 is mounted on a movable table 3, as shown. Figure 2 As shown, the movable platform 3 has an I-shaped structure, and its two ends are provided with limiting baffles 31 for limiting the displacement of the mounting base plate 11 on the mold assembly 1, as shown. Figure 3 As shown, the lower surface of the movable platform 3 is connected to a slider 32 and a lead screw and nut mounting base 33, and a lead screw and nut 34 is installed inside the lead screw and nut mounting base 33. The lead screw and nut 34 is mounted on a lead screw, which is connected to a servo motor.

[0032] An I-shaped movable table 3 is used as the moving platform. The mold assembly 1 is moved at equal intervals for piece arrangement by a servo motor and a lead screw structure (lead screw and lead screw nut 34). The mounting base plate 11 on the mold assembly 1 is positioned on the movable table 3 by the slot formed by the upper limit plate 31, which facilitates shape change positioning.

[0033] like Figure 4 As shown, the mold assembly 1 includes a mounting base plate 11 and a plurality of sheet molds 12 arranged side by side on the mounting base plate 11. The mounting base plate 11 has mounting grooves 111 for the sheet molds 12. The bottom of the sheet molds 12 is embedded in the mounting grooves 111. The sheet molds 12 are fixed to the mounting base plate 11 by bolts. The spacing between adjacent sheet molds 12 is equal.

[0034] like Figure 5 As shown, each sheet mold 12 is provided with a toothed part 121 and a connecting part 122. The toothed part 121 is composed of a plurality of parallel first inserts 1211. The upper end of the first inserts 1211 is thinned to form a first pointed head 12111. The connecting part 122 is a notched cavity opened on the top of the sheet mold 12.

[0035] like Figure 6 As shown, the tablet pressing mechanism 2 includes a cantilever 21, a cylinder 22, and a pressing plate assembly 23. The cantilever 21 has an inverted L-shaped structure, including a vertical part 211 and a horizontal part 212. The cylinder 22 is mounted on the upper surface of the horizontal part 212, and its push rod passes downward through the horizontal part 212 and is connected to the pressing plate assembly 23. Four guide rods 24 are provided between the cantilever 21 and the pressing plate assembly 23. The upper end of the guide rod 24 passes through the horizontal part 212, and a linear bearing 25 is provided between the guide rod 24 and the horizontal part 212. A spacer 26 is sleeved on the outside of the linear bearing 25. The pressing plate assembly 23 includes a pressing plate 231 and a transition plate 232. The transition plate 232 is connected above the pressing plate 231. The lower end of the guide rod 24 is connected to the transition plate 232 through a fixed seat 27. The end of the push rod of the cylinder 22 is connected to the transition plate 232 through a cylinder flange 28. The lower surface of the pressure plate 231 is provided with mold reinforcing plates 29 in the same number as the sheet mold 12, and the mold reinforcing plates 29 are fixed to the lower surface of the pressure plate 231 by bolts.

[0036] like Figure 7 As shown, the mold reinforcing plate 29 has a second insert 291 that engages with the insert tooth portion 121 and a snap tooth 292 that engages with the notch cavity. The lower end of the second insert 291 is thinned to form a second pointed head 2911.

[0037] The tablet pressing mechanism 2 forms a cylinder-guide rod structure through the inverted L-shaped cantilever 21 and guide rod 24. Under the action of the cylinder 22, the pressure plate 231 and the transition plate 232 descend, so that the mold reinforcing plate 29 fixed on the pressure plate 231 and the sheet mold 12 are engaged together. That is, a second pointed head 2911 is inserted and engaged between the adjacent first pointed head 12111, and the snap teeth 292 engage with the notch cavity to reduce the deformation of the mold during the tube expansion process.

[0038] like Figure 8 As shown, the demolding assembly 4 includes two parallel demolding base plates 41. Each demolding base plate 41 has a mounting plate 42 connected to both ends by bolts. The demolding base plate 41 has a slot 411 for the sheet mold 12 to pass through.

[0039] In addition, in this embodiment, both the sheet mold 12 and the mold reinforcing plate 29 are hardened, which improves the springback ability of the mold after deformation and meets the production requirements of small-pitch products. Upper limit blocks 2311 are connected to the four corners of the pressure plate 231. The bottom of the upper limit blocks 2311 has protrusions. Lower limit blocks 112 are connected to the four corners of the mounting base plate 11. The top of the lower limit blocks 112 has recesses that mate with the protrusions. When the protrusions and recesses are fully engaged, the cylinder 22 stops pressing down, preventing damage to the sheet mold 12 during the pressing process due to improper meshing between the sheet mold 12 and the mold reinforcing plate 29. This provides guidance and protection before the pressure plate 231 is pressed into place.

[0040] Specific working principle: The servo motor rotates, driving the lead screw to rotate, causing the lead screw nut 34 to move the moving table 3 along the lead screw in a straight line, driving the mold assembly 1 into the sheet arrangement station. The mold assembly 1 moves at equal intervals, and the fins are inserted between the adjacent first inserts 1211. After the sheet arrangement is completed, the servo motor continues to rotate, and the lead screw nut 34 drives the moving table 3 to move directly below the pressing mechanism 2. The cylinder 22 is activated, driving the pressure plate 231 to descend, so that the mold reinforcing plate 29 fixed on the pressure plate 231 cooperates with the sheet mold 12 to expand the tube. After the tube expansion is completed, the ejection mechanism on the production line ejects the mounting plates 42 at both ends of the demolding assembly 4, so that the combination of fins and expanded tubes is ejected. The ejection mechanism falls back, driving the demolding assembly 4 to reset, and then the combination of fins and expanded tubes is removed manually or by a robot.

[0041] This embodiment employs a dual-fit structure of the inserting tooth portion 121 and the connecting portion 122 (the pointed ends of the first insert 1211 and the second insert 291 are inserted into each other, and the snap tooth 292 is engaged with the notch cavity), forming a three-dimensional positioning that keeps the mold stable under the pressure of tube expansion, effectively solving the problem of mold deformation in small-pitch production; the mold material treated with quenching process, combined with the thinning design of the pointed ends, ensures both structural strength and improves elastic recovery capability. The standardized slot structure formed by the I-shaped moving table 3 and the limiting baffle 31 improves the positioning accuracy of the mold assembly 1. The mold assembly can be quickly replaced by removing the bolts connecting the mold assembly 1 and the pressure plate assembly 23.

[0042] The cylinder-guide rod structure, combined with the linear bearing 25, ensures high vertical movement accuracy of the pressure plate 231. The symmetrical layout of the four guide rods 24 effectively balances the pressure force, avoiding mold damage caused by uneven loading. The automated demolding assembly 4 achieves non-destructive demolding through the ejection mechanism, improving the product qualification rate.

[0043] The technical solution of this embodiment, through innovative structural design and system integration, not only solves the core problems of insufficient precision, mold deformation and difficulty in changing molds in the production of small-pitch products by traditional equipment, but also establishes a high-precision, high-efficiency and high-stability production process system, providing reliable technical support for the manufacturing of products such as microchannel heat exchangers.

[0044] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A machining fixture for small-particle-gap products in an oblique insertion automatic tablet expansion machine, comprising a mold assembly (1) and a tablet pressing mechanism (2), characterized in that: The mold assembly (1) includes a mounting base plate (11) and a number of sheet molds (12) arranged side by side on the mounting base plate (11). The spacing between adjacent sheet molds (12) is equal. Each sheet mold (12) is provided with a toothed part (121) and a connecting part (122). The toothed part (121) is composed of a number of parallel first inserts (1211). The connecting part (122) is a notch cavity opened on the top of the sheet mold (12). The tablet pressing mechanism (2) includes a cantilever (21), a cylinder (22) and a pressure plate assembly (23). The cylinder (22) is mounted on the upper surface of the cantilever (21), and its push rod passes through the cantilever (21) and is connected to the pressure plate assembly (23). At least two guide rods (24) are provided between the cantilever (21) and the pressure plate assembly (23). The lower surface of the pressure plate assembly (23) is provided with mold reinforcing plates (29) in the same number as the sheet mold (12). The mold reinforcing plate (29) has a second insert (291) that engages with the insert tooth part (121) and a snap tooth (292) that engages with the notch cavity.

2. The machining fixture for small-pitch products in the oblique insertion automatic sheet expansion machine according to claim 1, characterized in that: The sheet mold (12) is fixed to the mounting base plate (11) by bolts, and the upper end of the first insert (1211) is thinned to form a first pointed head (12111); the mold reinforcing plate (29) is fixed to the lower surface of the pressure plate assembly (23) by bolts, and the lower end of the second insert (291) is thinned to form a second pointed head (2911).

3. The machining fixture for small-pitch products in the oblique insertion automatic sheet expansion machine according to claim 1, characterized in that: The mold assembly (1) is mounted on the movable platform (3), which has an I-shaped structure and is provided with limiting baffles (31) at both ends for limiting the displacement of the mounting base plate (11).

4. The machining fixture for small-pitch products in the oblique insertion automatic sheet expansion machine according to claim 3, characterized in that: The bottom surface of the movable platform (3) is connected to a slider (32) and a lead screw nut mounting seat (33), and a lead screw nut (34) is installed in the lead screw nut mounting seat (33).

5. The machining fixture for small-pitch products in the oblique insertion automatic sheet-laying and tube-expanding machine according to claim 1, characterized in that: The mounting base plate (11) has an mounting groove (111) for a sheet mold (12), and the bottom of the sheet mold (12) is embedded in the mounting groove (111).

6. The machining fixture for small-pitch products in the oblique insertion automatic sheet expansion machine according to claim 1, characterized in that: The cantilever (21) has an inverted L-shaped structure, including a vertical part (211) and a horizontal part (212). The cylinder (22) is installed on the upper surface of the horizontal part (212). The upper end of the guide rod (24) passes through the horizontal part (212). A linear bearing (25) is provided between the guide rod (24) and the horizontal part (212). A spacer (26) is sleeved on the outside of the linear bearing (25).

7. The machining fixture for small-pitch products in the oblique insertion automatic sheet expansion machine according to claim 1, characterized in that: The pressure plate assembly (23) includes a pressure plate (231) and a transition plate (232). The transition plate (232) is connected above the pressure plate (231). The lower end of the guide rod (24) is connected to the transition plate (232) through a fixed seat (27). The end of the push rod of the cylinder (22) is connected to the transition plate (232) through a cylinder flange (28). The mold reinforcing plate (29) is connected to the bottom surface of the pressure plate (231).

8. The machining fixture for small-pitch products in the oblique insertion automatic sheet expansion machine according to claim 1, characterized in that: It also includes a demolding assembly (4), which includes two parallel demolding base plates (41). Each of the demolding base plates (41) has a mounting plate (42) bolted to both ends. The demolding base plate (41) has a slot (411) for the sheet mold (12) to pass through.

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