Fin push type fixed length milling machine

Abstract

The present invention relates to a fin flat-push fixed-length milling machine, comprising a frame having a first mounting platform and a second mounting platform, a fin feeding and advancing mechanism being provided on the first mounting platform, and a fin milling mechanism being provided on the second mounting platform; the characteristic is that: the fin feeding and advancing mechanism comprises a frame-type slide, which is mounted on the first mounting platform through a slide rail structure and driven by a first driving structure to slide forward and backward, a pressing block being provided on the upper part of the frame-type slide and driven by a second driving structure to move up and down, and the downward movement of the pressing block can press the fin passing through the frame-type slide; an origin position switch mounted on the first mounting platform and an induction block mounted at the bottom of the frame-type slide; a grating ruler mounted on the first mounting platform and a grating ruler reading head mounted at the bottom of the frame-type slide. This feeding method has no requirement on the pitch of each tooth of the fin, and therefore can adapt to and cut to fixed length the fins produced by the fin forming machine with relatively poor precision on the current market.

Description

Technical Field

[0001] The invention relates to a cutting device, in particular to a fin flat-push fixed-length milling machine. Background Art

[0002] Aluminum fins are widely used in automotive aluminum radiator radiators, parallel flow condensers, parallel flow evaporators, radiators or surface coolers, variable air volume air conditioning cabinets, fan coils and heat exchangers. Its main function is to dissipate heat. The existing aluminum fin forming machine is usually structured as follows, mainly including a discharge mechanism for conveying aluminum foil and a forming mechanism for corrugated forming. In the production of plate-fin fins, due to the various shapes of fins (the shapes of fins are straight, staggered and corrugated, etc.), the precise cutting of fin length has always been an industry problem. The existing cutting machines have large cutting errors and poor cutting quality, which cannot meet the needs of actual production. There is an urgent need for an accurate, high-quality and efficient fin-specific cutting machine to meet production needs. The previous fin cutting method was manual cutting, which is inefficient, has large errors and many waste products. There is an urgent need for a dedicated automatic cutting machine to solve the fin cutting problem. How to smoothly promote the movement of the fins and the layout of the cutting device are the key to achieving accurate, high-quality and efficient fin cutting.

[0003] Our company's patents CN201320068043.4 "A fin automatic cutting system", CN201320292255.0 "A fin cutting machine", and CN201410024122.4 "A high-precision multi-fin gear hobbing cutting machine" all solve the problem of fixed-length cutting of different types of fins. They all control the cutting length by accurately controlling the number of teeth required to cut the fins, which requires that the pitch of each tooth of the formed fin must be very accurate and stable. The fins produced by our company's high-precision fin forming equipment can meet this requirement. However, there are still fin forming machines with relatively poor precision on the market. The pitch size of each tooth of the fins produced by these devices is unstable. If the fin cutting machine involved in the above patents is used, the length of the cut fins is also unstable.

[0004] In order to solve this problem, the push-type fin fixed-length milling machine described in this patent was developed. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a high-precision multi-fin gear-rolling cutting machine suitable for cutting multiple fins at the same time in view of the above-mentioned existing technical status, and the cutting machine can make the cutting of fins more efficient and accurate.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: a fin flat-push fixed-length milling machine, including a frame body with a first mounting platform and a second mounting platform, the first mounting platform is provided with a fin feeding and pushing mechanism, the second mounting platform is provided with a fin milling mechanism; the fin feeding and pushing mechanism is used to push the fin forward to the fin milling mechanism for cutting; it is characterized in that: the fin feeding and pushing mechanism includes a frame-type slide, which is installed on the first mounting platform through a slide rail structure and is driven by a first driving structure to slide forward and backward, and the upper A pressure block driven by a second driving structure and capable of moving up and down is provided, and the downward movement of the pressure block can press the fin passing through the frame-type slide; an origin position switch installed on the first mounting platform and a sensing block installed at the bottom of the frame-type slide, the origin position switch and the sensing block can sense and cooperate with each other to detect whether the frame-type slide is reset in place; a grating ruler installed on the first mounting platform and a grating ruler reading head installed at the bottom of the frame-type slide, the length direction of the grating ruler is consistent with the travel direction of the fin, and the grating ruler and the grating ruler reading head sense and cooperate to accurately measure the length of the fin pushed forward.

[0007] As an improvement, a pad is fixed to the inner bottom surface of the frame-shaped slide for padding under the fin. The pad can be made of a material with a relatively low hardness to avoid damaging the fin during the pressing process.

[0008] Preferably, the first driving structure comprises a transmission screw installed on the first mounting platform and capable of rotating around its own axis, the transmission screw being driven to rotate by a motor installed on the first mounting platform, a transmission block being fixed at the bottom of the frame-shaped slide, and a transmission threaded hole for threaded connection of the transmission screw being opened on the transmission block. Screw drive has the advantages of stable transmission and high transmission accuracy.

[0009] As a further improvement, the first mounting platform is also provided with a front limit switch and a rear limit switch that can sense and cooperate with the sensing block. When the front limit switch or the rear limit switch senses the sensing block, the first driving structure stops working. The two limit switches serve as a safety protection to prevent the frame-type slide from being damaged by collision due to excessive movement when the program is out of control.

[0010] As a further improvement, the first mounting platform is provided with two support plates arranged at intervals in front and back and arranged in the left and right directions, and two transverse plates arranged at intervals in the left and right directions, the front and rear ends of the transverse plates are fixed on the support plates, the transverse plates pass through the interior of the frame-type slide, and the transverse plates are located below the fins passing through the frame-type slide. Support cylinders are provided below the left and right ends of each support plate, and the support cylinders drive the support plates to move up and down. The floating design of the support plate means that when the frame-type slide is delivered in place, the support plate and the transverse plate rise under the action of the support cylinder, lift the fins up a little distance, and the fins are separated from the inner bottom surface of the frame-type slide, so that during the return process of the frame-type slide, the frame-type slide will not drive the fins to move backward, which better ensures the consistency of the length of the fins conveyed forward each time. If the fins move backward, wrinkles will be formed in the thickness of the fins, which may not only damage the fins, but also cannot guarantee the accuracy of the fins being conveyed forward next time.

[0011] As a further improvement, the first mounting platform is also provided with two guide plates spaced apart from each other and arranged in the front-to-back direction. The front and rear ends of the guide plates are fixed on the support plate and located outside the transverse plate. The fins passing through the frame-type slide are located between the two guide plates. The guide plates have a restraining effect on the left and right directions of the fins, ensuring that the fins are fed in straight without tilting during feeding, thus ensuring accurate feeding. In addition, the top surface of the support plate is also fixed with a plurality of auxiliary transverse plates spaced apart from each other and arranged in the front-to-back direction. The setting of the auxiliary transverse plates can increase the contact area with the fins, making it more stable to lift the fins.

[0012] As an improvement, a roller mounting frame is fixed to the rear side of the first mounting platform, and a feed roller is installed on the roller mounting frame; the roller mounting frame includes a connecting rod and a support, the support is fixed to the first mounting platform, the connecting rod is swingably connected to the support, and the connecting rod and the support are locked by a locking structure, and the end of the feed roller is installed on the connecting rod. The feed roller plays an auxiliary supporting and guiding role for the fin, so that it can smoothly enter the frame slide. In addition, the height of the feed roller can be adjusted by the different upward swing angles of the connecting rod, combined with the locking structure.

[0013] As a further improvement, the fin milling mechanism includes a motor mounting seat, which is mounted below the second mounting platform through a guide structure and driven by a third driving structure to slide forward and backward. The motor mounting seat is equipped with a milling motor, and a milling saw blade is mounted on the output end of the milling motor. A milling slit set along the front-to-back direction is opened on the second mounting platform, and the milling saw blade exposes the milling slit upward; two pressing plates are arranged above the second mounting platform and along the front-to-back direction, and the milling slit is located between the two pressing plates. The two ends of each pressing plate can move up and down by being driven by a pressing plate cylinder, and the downward movement of the pressing plate can press the fins tightly onto the second mounting platform. The rotating milling saw blade, combined with the milling saw blade driven by the driving structure, slides left and right along the specified straight line set by the milling slit to cut the fins, with a high cutting angle, and the rotating milling saw blade can cut the fins more easily.

[0014] As a further improvement, a notch is provided on one side of the motor mounting seat for the milling saw blade to be exposed. The notch provides a larger space for convenient replacement of the milling saw blade.

[0015] Preferably, the guide structure comprises two guide rods arranged in parallel and spaced apart from each other and arranged in the left-right direction below the second mounting platform, and the two guide rods pass through the motor mounting seat to provide guidance; the third driving structure is a transmission chain driven to rotate by a sprocket motor, and the motor mounting seat is fixed on the transmission chain. The setting of the guide rods can better guide the sliding of the motor mounting seat, ensuring accurate cutting, and the chain transmission structure has the advantages of large transmission force and not easy to be damaged.

[0016] Compared with the prior art, the advantages of the present invention are as follows: the feeding method of the present structure is to press the fins tightly into the frame slide, and then drive the frame slide to drive the fins forward through the driving structure; the grating ruler and the grating ruler reading head are combined to accurately measure the length of the fins pushed forward; after one fin is conveyed, the driving structure drives the frame slide to move backward and reset, and the origin position switch and the induction block can sense and cooperate with each other to detect whether the frame slide is reset in place; thereby ensuring the consistency of the length of the fins conveyed each time, that is, the consistency of the length of the fins after each cutting is high. The present feeding method has no requirements for the pitch of each tooth of the fin, and the feeding method is independent of the pitch size of the fin, so it can adapt to and cut the fins produced by the fin forming machine with relatively poor precision on the market to a fixed length. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of an embodiment of the present invention;

[0018] Figure 2 A top view of an embodiment of the present invention;

[0019] Figure 3 A side view of an embodiment of the present invention;

[0020] Figure 4 is a cross-sectional view of a supporting plate portion in an embodiment of the present invention;

[0021] Figure 5 for Figure 4 AA section view;

[0022] Figure 6 A schematic diagram of a frame-type slide pressing fin in an embodiment of the present invention;

[0023] Figure 7 It is a schematic diagram of the frame-type slide frame not pressing the fins and the supporting plate lifting the fins in an embodiment of the present invention;

[0024] Figure 8 A top view of a frame-type slide portion in an embodiment of the present invention;

[0025] Fig. 9 A cross-sectional view of a frame-type slide portion in an embodiment of the present invention;

[0026] Fig.10 Schematic diagram of the fin milling mechanism in an embodiment of the present invention. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below with reference to the accompanying drawings.

[0028] like Figures 1 to 10 Shown is a preferred embodiment of the present invention.

[0029] A fin flat-push fixed-length milling machine comprises a frame 1 having a first mounting platform 11 and a second mounting platform 12, wherein the first mounting platform 11 is provided with a fin feeding and pushing mechanism, and the second mounting platform 12 is provided with a fin milling mechanism; the fin feeding and pushing mechanism is used to push the fin 4 forward to the fin milling mechanism 30 for cutting;

[0030] Fin feeding propulsion mechanism includes

[0031] The frame type slide 2 is a rectangular frame structure. The bottom of the frame type slide 2 is mounted on the first mounting platform 11 through a slide rail structure 21 and driven by a first driving structure 22 to slide forward and backward. The first driving structure 22 includes a transmission screw 220 mounted on the first mounting platform 11 and capable of rotating around its own axis. The transmission screw 220 is driven to rotate by a motor 221 mounted on the first mounting platform 11. A transmission block 222 is fixed to the bottom of the frame type slide 2. The transmission block 222 is provided with a transmission threaded hole 223 for the transmission screw 220 to be threadedly connected. A pressing block 24 is provided at the upper part of the frame type slide 2, which is driven by a second driving structure 23 to move up and down. The downward movement of the pressing block 24 can press the fin 4 passing through the frame type slide 2. A pad 29 for padding under the fin 4 is fixed to the inner bottom surface of the frame type slide 2. The second driving structure 23 is a driving cylinder.

[0032] The origin position switch 25 installed on the first installation platform 11 and the induction block 26 installed at the lower part of the frame-shaped slide 2 can sense and cooperate with each other to detect whether the frame-shaped slide 2 is reset to its original position.

[0033] The grating scale 27 installed on the first mounting platform 11 and the grating scale reading head 28 installed at the lower part of the frame slide 2, the length direction of the grating scale 27 is consistent with the travel direction of the fin 4, and the grating scale 27 and the grating scale reading head 28 cooperate with each other to accurately measure the length of the fin 4 pushed forward.

[0034] The first mounting platform 11 is also provided with a front limit switch 210 and a rear limit switch 211 which can sense and cooperate with the sensing block 26. When the front limit switch 210 or the rear limit switch 211 senses the sensing block 26, the first driving structure 22 stops working.

[0035] The first mounting platform 11 is provided with two support plates 3 arranged at intervals in the front and rear direction and arranged in the left and right direction, and two transverse plates 31 arranged at intervals in the left and right direction and arranged in the front and rear direction, the front and rear ends of the transverse plates 31 are fixed on the support plates 3, the transverse plates 31 pass through the interior of the frame-type slide 2, and the transverse plates 31 are located below the fins 4 passing through the frame-type slide 2, and support cylinders 32 are provided below the left and right ends of each support plate 3, and the support cylinders 32 drive the support plates 3 to move up and down. The cylinder rod of the support cylinder 32 is fixed on the first mounting platform 11, and the cylinder body of the support cylinder 32 is fixed on the support plate, and a pad 321 is also provided between the cylinder rod of the support cylinder 32 and the first mounting platform 11.

[0036] The first mounting platform 11 is also provided with two guide plates 33 which are spaced apart from each other on the left and right and arranged in the front-to-back direction. The front and rear ends of the guide plates 33 are fixed on the supporting flat plate 3 and are located outside the transverse plate 31. The fin 4 passing through the frame-type slide 2 is located between the two guide plates 33. A plurality of auxiliary transverse plates 34 which are spaced apart from each other on the left and right and arranged in the front-to-back direction are also fixed to the top surface of the supporting flat plate 3.

[0037] A roller mounting frame 51 is fixed to the rear side of the first mounting platform 11, and a feed roller 5 is installed on the roller mounting frame 51; the roller mounting frame 51 includes a connecting rod 511 and a support 512, the support 512 is fixed on the first mounting platform 11, the connecting rod 511 is swingably connected to the support 512, and the connecting rod 511 and the support 512 are locked by a locking structure, and the end of the feed roller 5 is installed on the connecting rod 511.

[0038] Fin milling mechanism includes

[0039] The motor mounting seat 61 is mounted below the second mounting platform 12 through a guide structure and driven by a third driving structure to slide forward and backward. The motor mounting seat 61 is mounted with a milling motor 6. A milling saw blade 62 is mounted at the output end of the milling motor 6. A milling slit 121 arranged along the front-to-back direction is opened on the second mounting platform 12. The milling saw blade 62 exposes the milling slit 121 upward.

[0040] Two pressing plates 7 are arranged above the second mounting platform 12 and in the front-to-back direction, and the milling gap 121 is located between the two pressing plates 7. Both ends of each pressing plate 7 can move up and down by being driven by a pressing plate cylinder 71, and the downward movement of the pressing plate 7 can press the fin 4 tightly against the second mounting platform 12. The piston rod of the pressing plate cylinder 71 is fixed on the second mounting platform 12, and the cylinder body of the pressing plate cylinder 71 is fixed on the pressing plate 7.

[0041] A notch 611 is formed on one side of the motor mounting seat 61 for the milling saw blade 62 to be exposed.

[0042] The guide structure includes two guide rods 8 which are arranged in parallel and spaced apart below the second mounting platform 12 and in the left-right direction. The two guide rods 8 pass through the motor mounting seat 61 to guide it. The third driving structure is a transmission chain 91 driven to rotate by a sprocket motor 9, and the motor mounting seat 61 is fixed on the transmission chain 91.

[0043] The control system of this milling machine mainly includes: PLC, touch screen human-machine interface, servo controller, and travel switch. PLC controls the action process of the entire equipment. Users can set relevant parameters such as cutting position, advancing speed, cutting length, etc. through the touch screen. The servo controller is used to control the servo motor.

[0044] In this embodiment, the front-to-back direction is the travel direction of the fin 4, and the left-to-right direction is a direction perpendicular to the front-to-back direction.

[0045] The working principle and process of this milling machine are as follows.

[0046] Feeding process: the fin 4 is fed into the frame slide 2, the frame slide 2 is at the initial position, the second driving structure 23 drives the pressing block 24 to move downward, and the downward movement of the pressing block 24 can press the fin 4 passing through the frame slide 2 onto the cushion block 29, as shown in FIG. Figure 6 As shown; the motor 221 drives the transmission screw 220 to rotate around its own axis. According to the principle of screw transmission, the fin 4 is driven to move forward with the frame-type slide 2, and the grating ruler 27 and the grating ruler reading head 28 are combined to accurately measure the length of the fin 4 pushed forward. Until the fin 4 enters the bottom of the pressure plate 7, the second driving structure 23 drives the pressing block 24 to move up, and the pressing block 24 leaves the fin 4, and the supporting cylinder 32 is actuated to drive the frame composed of the supporting plate 3, the transverse plate 31, the guide plate 33 and the auxiliary transverse plate 34 to move up, and drive the fin 4 to move up and leave the cushion block 29, as shown in FIG. Figure 7 The motor 221 drives the transmission screw 220 to rotate in the opposite direction around its own axis, and according to the principle of thread transmission, drives the frame slide 2 to move back relative to the fin 4 and reset. The origin position switch 25 and the induction block 26 can sense and cooperate with each other to detect whether the frame slide 2 is reset.

[0047] Cutting process: the pressing plate cylinder 71 drives the pressing plate 7 to move downward to press the fin 4 onto the second mounting platform 12, the milling gap 121 is located between the two pressing plates 7, the sprocket motor 9 drives the transmission chain 91 to rotate, and the rotating transmission chain 91 drives the rotating milling saw blade 62 to slide along the milling gap 121 along the motor mounting seat 61, revealing the milling gap 121 to cut off the fin 4 pressed under the pressing plate 7. After the cutting is completed, the milling saw blade 62 is reset along the motor mounting seat 61. The cutting is completed.

[0048] The feeding method of this structure is to press the fin 4 tightly into the frame slide 2, and then drive the frame slide 2 to drive the fin 4 forward through the driving structure; combine the grating ruler 27 and the grating ruler reading head 28 to accurately measure the length of the fin 4 pushed forward; after the fin 4 is transported once, the driving structure drives the frame slide 2 to move back and reset, and the origin position switch 25 and the induction block 26 can sense and cooperate with each other to detect whether the frame slide 2 is reset; thereby ensuring the consistency of the length of the fin 4 each time it is transported, that is, the consistency of the length of the fin 4 after each cutting is high. This feeding method has no requirements for the pitch of each tooth of the fin, and the feeding method has nothing to do with the pitch size of the fin. For this reason, it can adapt to and cut the fins produced by the fin forming machine with relatively poor accuracy on the market to a fixed length.

Claims

1. A fin flat-push fixed-length milling machine, comprising a frame (1) having a first mounting platform (11) and a second mounting platform (12), wherein the first mounting platform (11) is provided with a fin feeding and advancing mechanism, and the second mounting platform (12) is provided with a fin milling and cutting mechanism; the fin feeding and advancing mechanism is used to push the fin (4) forward to the fin milling and cutting mechanism (30) for cutting; Features: The fin feeding and advancing mechanism comprises: A frame-type slide (2) is mounted on a first mounting platform (11) via a slide rail structure (21) and is driven by a first drive structure (22) to slide forward and backward. A pressing block (24) is provided at the upper portion of the frame-type slide (2) and is driven by a second drive structure (23) to move up and down. The downward movement of the pressing block (24) can press the fin (4) passing through the frame-type slide (2). An origin position switch (25) mounted on the first mounting platform (11) and a sensing block (26) mounted at the bottom of the frame-type slide (2), wherein the origin position switch (25) and the sensing block (26) can sense and cooperate with each other to detect whether the frame-type slide (2) is reset; A grating ruler (27) is mounted on the first mounting platform (11) and a grating ruler reading head (28) is mounted on the lower part of the frame-type slide (2). The length direction of the grating ruler (27) is consistent with the travel direction of the fin (4). The grating ruler (27) and the grating ruler reading head (28) cooperate with each other inductively to accurately measure the length of the fin (4) pushed forward.

2. The fin flat-push fixed-length milling machine according to claim 1, Features: A cushion block (29) for cushioning below the fin (4) is fixed to the inner bottom surface of the frame-shaped slide (2).

3. The fin flat-push fixed-length milling machine according to claim 1, Features: The first driving structure (22) comprises a transmission screw (220) mounted on the first mounting platform (11) and capable of rotating about its own axis, the transmission screw (220) being driven to rotate by a motor (221) mounted on the first mounting platform (11), a transmission block (222) being fixed at the bottom of the frame-type slide (2), and a transmission threaded hole (223) for threaded connection of the transmission screw (220) being provided on the transmission block (222).

4. The fin flat-push fixed-length milling machine according to claim 1, Features: The first mounting platform (11) is also provided with a front limit switch (210) and a rear limit switch (211) which can sense and cooperate with the sensing block (26); when the front limit switch (210) or the rear limit switch (211) senses the sensing block (26), the first driving structure (22) stops working.

5. The fin flat-push fixed-length milling machine according to claim 1, Features: The first mounting platform (11) is provided with two support plates (3) spaced apart from each other and arranged in the left-right direction, and two transverse plates (31) spaced apart from each other and arranged in the front-back direction. The front and rear ends of the transverse plates (31) are fixed on the support plates (3). The transverse plates (31) pass through the interior of the frame-type slide (2). The transverse plates (31) are located below the fins (4) passing through the frame-type slide (2). Support cylinders (32) are provided below the left and right ends of each support plate (3). The support cylinders (32) drive the support plates (3) to move up and down.

6. The fin flat-push fixed-length milling machine according to claim 5, Features: The first mounting platform (11) is also provided with two guide plates (33) spaced apart from each other and arranged in the front-to-back direction, the front and rear ends of the guide plates (33) are fixed on the supporting plate (3) and are located outside the transverse plate (31), and the fin (4) passing through the frame-type slide (2) is located between the two guide plates (33); and a plurality of auxiliary transverse plates (34) spaced apart from each other and arranged in the front-to-back direction are also fixed on the top surface of the supporting plate (3).

7. The fin flat-push fixed-length milling machine according to claim 1, Features: A roller mounting frame (51) is fixed on the rear side of the first mounting platform (11), and a feeding roller (5) is mounted on the roller mounting frame (51); the roller mounting frame (51) comprises a connecting rod (511) and a support (512), the support (512) is fixed on the first mounting platform (11), the connecting rod (511) is swingably connected to the support (512), and the connecting rod (511) and the support (512) are locked by a locking structure, and the end of the feeding roller (5) is mounted on the connecting rod (511).

8. The fin flat-push fixed-length milling machine according to any one of claims 1 to 7, Features: The fin milling mechanism comprises A motor mounting seat (61) is mounted below the second mounting platform (12) through a guide structure and is driven by a third driving structure to slide forward and backward. A milling motor (6) is mounted on the motor mounting seat (61). A milling saw blade (62) is mounted on the output end of the milling motor (6). A milling slit (121) arranged along the front-rear direction is formed on the second mounting platform (12). The milling saw blade (62) exposes the milling slit (121) upward. Two pressing plates (7) are arranged above the second mounting platform (12) and along the front-to-back direction. The milling gap (121) is located between the two pressing plates (7). Both ends of each pressing plate (7) are driven by a pressing plate cylinder (71) to move up and down. The downward movement of the pressing plate (7) can press the fin (4) onto the second mounting platform (12).

9. The fin flat-push fixed-length milling machine according to claim 8, Features: A notch (611) is provided on one side of the motor mounting seat (61) for the milling saw blade (62) to be exposed.

10. The fin flat-push fixed-length milling machine according to claim 8, Features: The guide structure comprises two guide rods (8) arranged in parallel and spaced apart from each other in the left-right direction below the second mounting platform (12), the two guide rods (8) passing through the motor mounting seat (61) to provide guidance thereto; the third driving structure is a transmission chain (91) driven to rotate by a sprocket motor (9), the motor mounting seat (61) being fixed on the transmission chain (91).

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