Automatic restraint type hobbing cutter arbor

Abstract

The utility model discloses an automatic constraint type hobbing cutter spindle head, including main frame, one end of main frame rotatory connection fixed end pressure joint disc, and the pressure joint surface center of fixed end pressure joint disc is equipped with the guide cylinder that can extend into the hobbing cutter center hole, another end of main frame is equipped with the cylinder, and the slide of cylinder rotatory connection movable pressure joint disc, and the pressure joint surface center of movable pressure joint disc is equipped with the avoidance hole that cooperates with the guide cylinder. The utility model discloses one end pressure joint disc of main frame can rotate, and the other end is fixed on the cylinder slide, and the cutter is pressed tightly through the cylinder and drives the other side pressure joint disc, and when disassembling, just loosen the pressure joint disc, realize quick loading and unloading function, and the production efficiency is improved significantly.

Description

Technical Field

[0001] This utility model relates to a blade fixing device, and more particularly to an automatic constraint type hobbing cutter spindle head. Background Technology

[0002] With the rapid development of electronic products and the ever-changing market demands for leather products, the workload of cutting is enormous, which reduces the frequency of tool (circular hob) replacement. Traditional tools use threaded fastening solutions, such as the annular blade edge processing device disclosed in CN 219805806U. Each disassembly requires manual rotation. This solution is suitable for small-batch production or scenarios with low reliance on automation, but it is not suitable for large-batch, highly automated production scenarios, as it will affect production efficiency. Utility Model Content

[0003] Purpose of the utility model: The purpose of this utility model is to provide an automatically constrained hobbing cutter spindle head that can be quickly disassembled.

[0004] Technical solution: The present invention discloses an automatic constraint type hob spindle head, comprising a main frame, one end of which is rotatably connected to a fixed end pressing plate. The pressing surface of the fixed end pressing plate is provided with a guide cylinder that can extend into the center hole of the hob. The other end of the main frame is provided with a cylinder, the slide of which is rotatably connected to a movable pressing plate. The pressing surface of the movable pressing plate is provided with an avoidance hole that cooperates with the guide cylinder.

[0005] Preferably, the fixed end pressing plate is rotatably connected to the main frame via a first bearing, and there are no fewer than two first bearings.

[0006] Preferably, a bushing is provided between adjacent first bearings.

[0007] Preferably, cylindrical magnets are evenly distributed around the perimeter of the pressing surface of the fixed-end pressing plate.

[0008] Preferably, the fixed end pressing plate has a stepped circular structure. Along the axial direction, the fixed end pressing plate has a threaded section, a first middle section, and an end face section in sequence. The end face section has a guide cylinder at its center. The first middle section has two sections. The outer diameter of the first section near the end face section is larger than the inner diameter of the inner ring of the first bearing. The outer diameter of the remaining second section matches the inner diameter of the inner ring of the first bearing.

[0009] Preferably, the main frame is provided with a first stepped hole. The inner diameter of the inlet section of the first stepped hole near the movable pressing plate is greater than the outer diameter of the first section of the middle section of the fixed end pressing plate, but smaller than the outer diameter of the outer ring of the first bearing. The middle section of the first stepped hole matches the outer diameter of the outer ring of the first bearing. The main frame corresponding to the outlet section of the first stepped hole is provided with a first threaded hole.

[0010] Preferably, the cylinder slide is connected to the inner shaft via a connecting block, and the movable pressing plate is rotatably connected to the inner shaft via a second bearing.

[0011] Preferably, the inner shaft has a stepped circular structure. Along the axial direction, the inner shaft has a front section, a second middle section, and a tail section in sequence. The end face of the front section has a clearance hole at its center and a flange on its outer periphery. The outer diameter of the front section matches the inner diameter of the second bearing inner ring. The second middle section has a locking nut for fixing the inner ring of the second bearing. The tail section is connected to the connecting block.

[0012] Preferably, the movable pressing plate is provided with a second stepped hole in the center. The outer diameter of the inlet section of the second stepped hole is larger than the outer diameter of the flange. The movable pressing plate corresponding to the bottom of the inlet section is provided with a second threaded hole. The inner diameter of the middle section of the second stepped hole matches the outer diameter of the outer ring of the second bearing. The inner diameter of the outlet section of the second stepped hole is larger than the outer diameter of the locking nut and smaller than the outer diameter of the outer ring of the bearing.

[0013] Preferably, the top of the main frame is provided with a central limiting groove.

[0014] Beneficial effects: Compared with the prior art, this utility model has the following advantages: 1. Quick disassembly: One end of the pressing plate can rotate, and the other end is fixed to the cylinder slide. The cylinder drives the other pressing plate to press the cutter. When disassembling, the pressing plate can be released, realizing the quick loading and unloading function and significantly improving production efficiency; 2. Realizes automated clamping; 3. Simple structure and low cost, which helps to reduce production costs; 4. Suitable for quick loading and unloading of circular roller cutters for cutting leather and thin rubber materials; 5. High flexibility, no encoder required, compatible with any equipment. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the spindle head of this utility model;

[0016] Figure 2 for Figure 1 A structural diagram from another perspective;

[0017] Figure 3 This is a cross-sectional view of the spindle head structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the spindle head clamping hob structure of this utility model;

[0019] Figure 5 for Figure 4 Sectional view of the structure. Detailed Implementation

[0020] The technical solution of this utility model will be further described below with reference to the accompanying drawings.

[0021] like Figures 1 to 5The spindle head 1 mainly consists of three parts: the main frame 1, the fixed end pressing plate 5, and the movable pressing plate 3. One end of the main frame 1 is rotatably connected to the fixed end pressing plate 5, and the other end is rotatably connected to the movable pressing plate 3 via a cylinder 7. The fixed end pressing plate 5 has a guide cylinder at its center, which matches the center hole of the hob 8. The movable pressing plate 3 has a clearance hole at its center that matches the guide cylinder. When it is necessary to fix the hob 8, the hob 8 is first placed on the guide cylinder, and then the movable pressing plate 3 is driven to approach the fixed end pressing plate 5, which clamps the hob 8 on both sides. The gap between the guide cylinder and the center hole of the hob 8 is controlled at 0.01~0.03mm to ensure that the fixed end pressing plate 5 and the hob 8 are coaxially assembled, ensuring the accuracy during cutting.

[0022] The fixed end pressing plate 5 is rotatably connected to the main frame 1 via the bearing 57. The fixed end pressing plate 5 has a stepped circular structure. Along the axial direction (from left to right in the figure), the fixed end pressing plate 5 has a threaded section, a middle section, and an end face section in sequence. The end face section has a guide cylinder at its center, and the remaining part forms a pressing surface for pressing the hob 8. The middle section has two sections. The outer diameter of the first section near the end face section is larger than the inner diameter of the inner ring of the bearing 57. The outer diameter of the remaining second section matches the inner diameter of the inner ring of the bearing 57. The threaded section is used to connect the locking nut 54. After the middle section is fitted with the bearing 57, the first section near the end face section cooperates with the locking nut 54 to fix the two ends of the inner ring of the bearing 57.

[0023] The main frame 1 is provided with a stepped hole. The inner diameter of the inlet section of the stepped hole near the movable pressing plate 3 is larger than the outer diameter of the first section of the middle section of the fixed end pressing plate 5, but smaller than the outer diameter of the outer ring of the bearing 57. This allows the fixed end pressing plate 5 to be connected and fixes one end of the outer ring of the bearing 57. The inner diameter of the middle section of the stepped hole is adapted to the outer diameter of the bearing 57. The outlet section at the other end of the stepped hole is provided with a threaded hole on the main frame 1. The threaded hole allows the screw 52 to be connected and fixes the other end of the outer ring of the bearing 57.

[0024] There are two bearings 57, with a bushing 6 between them. The depth of the stepped hole in the middle is slightly shallower than the combined thickness of the two bearings 57 and the bushing 6, with a difference of about 0.2 mm. The fixed end pressing plate 5 serves as the main plate and adopts a double bearing structure, making its structural rigidity superior to that of the movable pressing plate 3.

[0025] The end face section has small holes evenly spaced around the pressing surface to accommodate columnar magnets 56. The columnar magnets 56 are installed through the small holes and fixed with adhesive. When the roller cutter 8 is automatically changed, the magnets 56 can be used to quickly position the roller cutter 8, preventing it from shaking and avoiding the risk of the roller cutter 8 being crushed by the movable pressing plate 3 when there is gap or shaking.

[0026] The other end of the main frame 1 is provided with a mounting hole for assembling with the cylinder 7, which is used to fix the cylinder 7. The connecting block 2 is connected to the slide of the cylinder 7. The connecting block 2 is connected to the inner shaft 4. The movable pressure plate 3 bearing 37 is rotatably connected to the inner shaft 4. Specifically, the inner shaft 4 has a stepped circular structure. Along the axial direction, the inner shaft 4 has a front section, a middle section, and a tail section in sequence. The tail section is fixedly connected to the connecting block 2. The clearance hole is located at the center of the end face of the front section. The outer diameter of the front section matches the inner diameter of the inner ring of the bearing 37. The outer circumference of the end face of the front section is provided with a flange. The middle section is provided with a thread and connected with a lock nut 35. The bearing 37 is sleeved on the front section. The two ends of the inner ring of the bearing 37 are limited by the flange and the lock nut 35.

[0027] The movable pressing plate 3 has a stepped hole in the center, and the remaining part serves as the pressing surface for the hob 8. The middle section of the stepped hole is used to accommodate the bearing 37, with its inner diameter matching the outer diameter of the bearing 37's outer ring and its depth matching the thickness of the bearing 37, slightly shallower than the thickness of the bearing 37 by about 0.2 mm. The entrance section of the stepped hole is close to the fixed end pressing plate 5, and its outer diameter is larger than the outer diameter of the flange. The exit section of the stepped hole is close to the connecting block 2, with its inner diameter larger than the outer diameter of the locking nut 35 but smaller than the outer diameter of the bearing 37's outer ring, so that the inner shaft 4 can pass through and abut against one end of the bearing 37's outer ring. The movable pressing plate 3 corresponding to the bottom of the entrance section has a threaded hole, which is used to connect the screw 33 to fix the other end of the bearing 37's outer ring. The entrance section is used to accommodate the flange to avoid interference during later assembly and to provide countersunk space for the screw 33.

[0028] The top of the main frame 1 is provided with a central limiting groove 11. The central limiting groove 11 is used to be compatible with different types of equipment, such as leather cutting and rubber pad absorbent cutting devices, so that the center of the cutter is coaxially aligned with the axis of the equipment.

[0029] During assembly, a bushing 6 is placed between the two bearings 57 and inserted into the stepped hole of the main frame 1. The outer ring of the bearing 57 is pressed with the nut of the screw 52. The fixed end pressing plate 5 is connected to the bearing 57 and the threaded section is locked with the lock nut 54. The inner shaft 4 is fitted with the bearing 37 and the movable pressing plate 3. The tail section is fixed to the connecting block 2. The inner ring of the bearing 37 is fastened with the lock nut 35. The movable pressing plate 3 and the outer ring of the bearing 37 are locked with the screw 33. The connecting block 2 is first assembled with the cylinder 7, and then the cylinder 7 is assembled with the main frame 1.

[0030] In use, the cylinder 7 of the spindle head is mechanically assembled and electrically interconnected with the relevant cutting equipment. The clamping or opening state of the movable pressing plate 3 is controlled by the controllable air circuit: First, the movable pressing plate 3 is in the open state. The hobbing cutter 8 is placed on the fixed pressing plate 5, and its magnet 56 attracts the hobbing cutter 8. The clamping of the hobbing cutter 8 by controlling the movable pressing plate 3 through the air circuit completes the clamping of the cutting tool. In actual use, it can be combined with various methods such as tool path programming of the tool holder feeding to achieve fully automated clamping.

Claims

1. An automatic constraint type hob spindle head, comprising a main frame (1), characterized in that, One end of the main frame (1) is rotatably connected to a fixed end pressing plate (5). The pressing surface of the fixed end pressing plate (5) is provided with a guide cylinder that can extend into the center hole of the hob. The other end of the main frame (1) is provided with a cylinder (7). The slide of the cylinder (7) is rotatably connected to a movable pressing plate (3). The pressing surface of the movable pressing plate (3) is provided with a clearance hole that cooperates with the guide cylinder.

2. The automatic constraint type hob spindle head according to claim 1, characterized in that, The fixed end pressing plate (5) is rotatably connected to the main frame (1) through the first bearing (57), and there are no less than two first bearings (57).

3. The automatic constraint type hob spindle head according to claim 2, characterized in that, A bushing (6) is provided between adjacent first bearings (57).

4. The automatic constraint type hob spindle head according to claim 1, characterized in that, The pressing surface of the fixed end pressing plate (5) is provided with cylindrical magnets evenly distributed around its pressing surface.

5. The automatic constraint type hob spindle head according to any one of claims 1 to 4, characterized in that, The fixed end pressing plate (5) has a stepped circular structure. Along the axial direction, the fixed end pressing plate (5) has a threaded section, a first middle section, and an end face section in sequence. The end face section has a guide cylinder at its center. The first middle section has two sections. The outer diameter of the first section near the end face section is larger than the inner diameter of the inner ring of the first bearing (57). The outer diameter of the remaining second section matches the inner diameter of the inner ring of the first bearing (57).

6. The automatic constraint type hob spindle head according to claim 5, characterized in that, The main frame (1) is provided with a first stepped hole. The inner diameter of the inlet section of the first stepped hole near the movable pressing plate (3) is greater than the outer diameter of the first section of the middle section of the fixed end pressing plate (5) and smaller than the outer diameter of the outer ring of the first bearing (57). The middle section of the first stepped hole matches the outer diameter of the outer ring of the first bearing (57). The main frame (1) corresponding to the outlet section of the first stepped hole is provided with a first threaded hole.

7. The automatic constraint type hob spindle head according to any one of claims 1 to 4, characterized in that, The slide of the cylinder (7) is connected to the inner shaft (4) via the connecting block (2), and the movable pressing plate (3) is rotatably connected to the inner shaft (4) via the second bearing (37).

8. The automatic constraint type hob spindle head according to claim 7, characterized in that, The inner shaft (4) has a stepped circular structure. Along the axial direction, the inner shaft (4) has a front section, a second middle section, and a tail section in sequence. The end face of the front section is provided with a clearance hole at the center and a flange is provided on the outer periphery of the end face. The outer diameter of the front section matches the inner diameter of the inner ring of the second bearing (37). The second middle section is provided with a locking nut (35) for fixing the inner ring of the second bearing (37). The tail section is connected to the connecting block (2).

9. The automatic constraint type hob spindle head according to claim 8, characterized in that, The movable pressing plate (3) is provided with a second stepped hole in the center. The outer diameter of the inlet section of the second stepped hole is larger than the outer diameter of the flange. The movable pressing plate (3) corresponding to the bottom of the inlet section is provided with a second threaded hole. The inner diameter of the middle section of the second stepped hole matches the outer diameter of the outer ring of the second bearing (37). The inner diameter of the outlet section of the second stepped hole is larger than the outer diameter of the locking nut (35) and smaller than the outer diameter of the outer ring of the bearing (37).

10. The automatic constraint type hob spindle head according to claim 1, characterized in that, The top of the main frame (1) is provided with a central limiting groove (11).

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