A self-rotating saw-tooth micro-hole cutting tool of a rapid prototyping die-cutting machine

Abstract

The present application relates to a kind of die-cutting machines, more particularly to a kind of self-rotating sawtooth micro-hole cutting tool of rapid forming die-cutting machine, including sawtooth blade, chuck, first spring, thrust bearing and tool holder;The sawtooth blade is clamped in chuck, and the blade head of sawtooth blade extends chuck;The chuck is set in tool holder, and the bottom of chuck is in contact with the side of thrust bearing, and the other side of thrust bearing is in contact with the bottom surface of tool holder, and first spring is in contact between the other side of thrust bearing and the bottom surface of tool holder;The chuck is provided with toothed protrusion on the outer side wall, and the tool holder is provided with toothed recess on the inner side wall, and the width of toothed recess is greater than the width of toothed protrusion;There is an angle difference between the upper tooth and the lower tooth of toothed protrusion.Compared with prior art, the present application solves the problem that inertia is large and difficult to control in prior art due to the weight of motor.

Description

Technical Field

[0001] This invention relates to a die-cutting machine, and more specifically to a self-rotating serrated micro-cutting tool for a rapid prototyping die-cutting machine. Background Technology

[0002] Die-cutting is an essential process in the production of auxiliary materials for products in the electronics industry. With the rapid development of the electronics industry and the rapid growth of market demand, the emergence and development of die-cutting machines and rapid prototyping die-cutting machines can ensure the orderly expansion of production scale.

[0003] Currently, most die-cutting machines on the market use multiple motors to drive the horizontal and vertical movement of the die-cutting blade, and the blade rotates for die-cutting via its own motor. However, the presence of the motor makes the die-cutting blade heavy, and it has significant inertia when starting and stopping, which can lead to slow acceleration and difficulty in stopping, resulting in quality problems and product scrapping. Summary of the Invention

[0004] The purpose of this invention is to provide a self-rotating serrated micro-cutting tool for a rapid prototyping die-cutting machine to solve at least one of the above-mentioned problems. This addresses the issue that the die-cutting blade in the prior art has large inertia due to the weight of the motor, making it difficult to control. Through structural improvements, this invention allows the die-cutting blade to rotate directly via the electric push rod already configured on the die-cutting machine, avoiding the need for motor assembly and effectively reducing the overall weight of the die-cutting blade.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A self-rotating serrated micro-hole cutting tool for a rapid prototyping die-cutting machine includes a serrated blade, a chuck, a first spring, a thrust bearing, and a tool holder;

[0007] The serrated blade is clamped inside the chuck, with the blade tip extending out of the chuck;

[0008] The collet is located inside the tool holder, with the bottom of the collet abutting against one side of the thrust bearing, and a first spring abutting between the other side of the thrust bearing and the bottom surface of the tool holder.

[0009] The chuck has toothed protrusions on its outer side wall, and the handle has toothed recesses on its inner side wall that mate with the toothed protrusions, with the width of the toothed recesses being greater than the width of the toothed protrusions; there is an angular difference between the upper and lower teeth of the toothed protrusions.

[0010] When the serrated blade is not under force, the toothed protrusions and toothed recesses mesh with each other through the upper teeth, and separate from each other through the lower teeth;

[0011] When pressure is applied to the serrated blade, the chuck compresses the first spring, causing the toothed protrusion to separate from the upper tooth of the toothed recess, and the lower tooth of the toothed protrusion to enter the lower tooth of the toothed recess. Based on the angle difference between the upper and lower teeth, the chuck drives the serrated blade to rotate.

[0012] When the pressure on the serrated blade is released, the first spring pushes the chuck back, causing the toothed protrusion to separate from the lower tooth of the toothed recess, and the toothed protrusion to re-engage with the upper tooth of the toothed recess.

[0013] Preferably, the upper and lower teeth of the saw blade are each provided with 20 teeth, the upper teeth are in the shape of an equilateral triangle and the lower teeth are in the shape of a right triangle, and an angle difference of 18° is formed between the upper and lower teeth.

[0014] Preferably, the upper teeth of the tooth-shaped recess are spaced apart and do not exceed 20 teeth, and the upper teeth are equilateral triangles. The lower teeth of the tooth-shaped recess have 20 teeth and are right trapezoids.

[0015] Preferably, a centering device is retractably provided inside the serrated blade, and the centering device is concentrically arranged with the serrated blade.

[0016] Preferably, a second spring is provided between the bottom of the centerer and the bottom of the serrated blade, and the extension and retraction of the centerer is achieved by the elastic force of the second spring.

[0017] Preferably, the chuck includes a first chuck, a second chuck, and a third chuck arranged concentrically. The first chuck is sleeved on the outside of the serrated blade, the toothed protrusion is disposed on the outer side wall of the third chuck, and the second chuck is clamped between the first chuck and the third chuck.

[0018] Preferably, the top of the first clamp is flared, and the bottom abuts against the third clamp. The second clamp is sleeved on the outside of the top of the first clamp. A gap is formed between the first clamp and the third clamp, and a third spring is provided in the gap.

[0019] Preferably, the third chuck is a hollow structure, and the radius of the opening between the thrust bearing and the first chuck is the same as the radius of the opening at the center of the thrust bearing.

[0020] Preferably, the outer wall of the blade holder is provided with a convex ring, and the cutting tool is assembled onto the blade holder of the rapid prototyping die-cutting machine through the convex ring.

[0021] Preferably, the blade holder is mounted on the sliding carriage of the rapid prototyping die-cutting machine, and the cutting tool is pressed down by an electric push rod provided on the sliding carriage.

[0022] The working principle of this invention is as follows:

[0023] When pressure is applied to the serrated blade so that the blade tip presses against the material to be die-cut, the serrated blade is pressed and pushes the chuck to compress the first spring, causing the toothed protrusion to separate from the upper tooth of the toothed recess, and the lower tooth of the toothed protrusion to enter the gap between the lower tooth of the toothed recess. Based on the angle difference between the upper and lower teeth, the chuck will rotate, thereby driving the serrated blade to rotate.

[0024] When the pressure on the serrated blade is released and the cutter head leaves the material to be die-cut, the restoring force of the first spring pushes the chuck back, causing the toothed protrusion to separate from the lower tooth of the toothed recess, and the toothed protrusion to re-engage with the upper tooth of the toothed recess, completing a single rotation of the serrated blade.

[0025] By repeatedly applying and removing pressure, the serrated blade can be made to rotate continuously, thereby completing the die-cutting process.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The structural design of this invention avoids the use of a motor in the die-cutting blade, effectively reducing the defects of the machine's moving parts being heavy, slow in acceleration, and having large stopping inertia. Furthermore, the die-cutting blade proposed in this invention is a purely mechanical structure, which cleverly utilizes the cooperation between toothed protrusions and toothed recesses to form rotation, resulting in a simple structure that is easy to implement.

[0028] Meanwhile, the present invention also improves the structural design of the chuck, replacing the traditional coupling connection used for transmission with a multi-layer chuck clamping connection, which allows the die-cutting blade to be easily pushed out of the chuck by the blade ejector, thereby enabling quick replacement of the blade head and blade. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a prior art piercing tool;

[0030] Figure 2 A schematic diagram of a prior art piercing tool assembled on a die-cutting machine;

[0031] Figure 3 This is a schematic diagram of the cutting tool head portion of the present invention;

[0032] Figure 4 This is a schematic diagram of the overall structure of the piercing tool of the present invention;

[0033] Figure 5 This is a schematic diagram of the structure when the tooth-like protrusions and tooth-like depressions are spread out, where... Figure 5 a is a schematic diagram of the mating structure under normal conditions. Figure 5 b is a schematic diagram of the fit structure under pressure. Figure 5 c is a schematic diagram of the ligand structure in the released state;

[0034] In the diagram: 1-serrated blade; 2-handle; 3-first spring; 4-thrust bearing; 5-toothed protrusion; 6-toothed recess; 7-centerer; 8-second spring; 9-first chuck; 10-second chuck; 11-third chuck; 12-third spring. Detailed Implementation

[0035] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0036] Existing hole-cutting tools such as Figure 1 As shown, it consists of a circular blade, a centerer 7, a tool holder 2, a spring, a coupling, a reduction gear set, and a reduction motor, with each component assembled inside the tool holder 2.

[0037] The front end of the handle 2 is a circular blade with the blade tip extending out of the handle 2. A centering device 7 is concentrically arranged inside the circular blade. A spring is abutted in the space below the centering device 7, so that the centering device 7 can retract into the circular blade when pressed and can extend the circular blade when not pressed.

[0038] The rear section of the tool holder 2 is a geared motor. The output end of the geared motor is connected to one end of the coupling through a gear reduction set, and the other end of the coupling is connected to the end of the circular blade. The operation of the geared motor can drive the circular blade to rotate and perform die cutting.

[0039] A raised ring is provided on the outer side of the tool holder 2. The tool is assembled by abutting against the tool holder. Figure 2 As shown.

[0040] The cutting tool of this structure is relatively heavy due to the setting of the geared motor. When the sliding carriage starts and stops, the response speed is slow due to the large inertia. During automatic control die cutting, a certain amount of advance needs to be calculated for each start and stop point in order to match the design dimensions.

[0041] Example 1

[0042] A self-rotating serrated micro-cutting tool for a rapid prototyping die-cutting machine, such as Figure 3-5 As shown, it includes a serrated blade 1, a collet, a first spring 3, a thrust bearing 4, and a tool holder 2;

[0043] The serrated blade 1 is clamped inside the chuck, with the cutting edge of the serrated blade 1 extending out of the chuck;

[0044] The chuck is located inside the tool holder 2, with the bottom of the chuck abutting against one side of the thrust bearing 4, and the other side of the thrust bearing 4 abutting against the bottom surface of the tool holder 2 with a first spring 3.

[0045] The chuck has toothed protrusions 5 on its outer side wall, and the handle 2 has toothed recesses 6 on its inner side wall that cooperate with the toothed protrusions 5. The width of the toothed recesses 6 is greater than the width of the toothed protrusions 5. There is an angle difference between the upper and lower teeth of the toothed protrusions 5.

[0046] When the serrated blade 1 is not under force, the toothed protrusions 5 and toothed recesses 6 mesh with each other through the upper teeth, and separate from each other through the lower teeth;

[0047] When pressure is applied to the serrated blade 1, the chuck compresses the first spring 3, causing the toothed protrusion 5 to separate from the upper tooth of the toothed recess 6, and the lower tooth of the toothed protrusion 5 to enter the lower tooth of the toothed recess 6. Based on the angle difference between the upper and lower teeth, the chuck drives the serrated blade 1 to rotate.

[0048] When the pressure on the serrated blade 1 is released, the first spring 3 pushes the chuck back, causing the toothed protrusion 5 to separate from the lower tooth of the toothed recess 6, and the toothed protrusion 5 to re-engage with the upper tooth of the toothed recess 6.

[0049] More specifically, in this embodiment:

[0050] The cutting tool is still covered by the handle 2 on the outside, and its interior consists of a serrated blade 1, a collet, a thrust bearing 4 and a first spring 3 from front to back.

[0051] The serrated blade 1 has a serrated tip and extends beyond the handle 2, as shown below. Figure 3 As shown, the interior of the serrated blade 1, as in the prior art, is also equipped with a concentric centering device 7 and a second spring 8. The elastic force of the second spring 8 enables the centering device 7 to extend and retract within the serrated blade 1 and automatically return.

[0052] The outer side of the serrated blade 1 is clamped and limited by a chuck, such as... Figure 4 The first end of the collet rests against the inner wall of the front end of the tool holder 2, and the last end of the collet rests against one side of the thrust bearing 4. The other side of the thrust bearing 4 is in contact with the inner wall of the bottom surface of the tool holder 2, and a first spring 3 is installed therebetween. By pressing the serrated blade 1 into the tool holder 2, the collet can be pushed to compress the first spring 3.

[0053] A toothed protrusion 5 is provided on the outer side of the chuck, and a toothed recess 6 is provided on the inner side of the tool holder 2 to cooperate with it. See also Figure 5 The width of the tooth-shaped recess 6 is slightly larger than that of the tooth-shaped protrusion 5 (not less than the height of the tooth), allowing the tooth-shaped protrusion 5 to rotate between the tooth-shaped recesses 6. Figure 5 As shown in Figure a, when not under pressure, the first spring 3 presses the chuck towards the cutter head, at which point the upper teeth of the toothed protrusion 5 naturally mesh with the upper teeth of the toothed recess 6; when the serrated blade 1 comes into contact with the material to be die-cut and is subjected to inward pressure, such as Figure 5b. When the first spring 3 is compressed, the lower teeth of the toothed protrusion 5 mesh with the lower teeth of the toothed recess 6. Due to the angle difference caused by the shape difference between the upper and lower teeth, when the upper teeth of the toothed protrusion 5 are just engaged, its lower teeth are directly opposite the inclined surface of the lower teeth of the toothed recess 6. Therefore, when the lower teeth are engaged, they will move along the inclined surface, causing the chuck to rotate (the thrust bearing 4 at the end of the chuck can rotate freely when subjected to downward pressure), and further driving the serrated blade 1 to rotate; when the serrated blade 1 leaves the material to be die-cut and is not under pressure, such as Figure 5 c. The first spring 3 rebounds, causing the upper teeth of the toothed protrusion 5 and the upper teeth of the toothed recess 6 to re-engage. During engagement, a certain degree of rotation occurs due to the angle difference to ensure full engagement. Thus, the serrated blade 1 completes a rotation of one upper and lower tooth angle difference through a single downward press and lift. In this embodiment, the toothed protrusion 5 has 20 upper and 20 lower teeth. The upper teeth are equilateral triangles, and the lower teeth are right triangles (forming a ratchet-like structure to ensure unidirectional rotation). There is an 18° angle difference between the upper and lower teeth, so that the serrated blade 1 can rotate exactly one revolution after traversing all the teeth.

[0054] like Figure 4 As shown, the chuck can be further subdivided into a first chuck 9, a second chuck 10, and a third chuck 11. The first chuck 9 is directly fitted onto the outside of the serrated blade 1, and the upper end of the first chuck 9 ( Figure 4 (As shown in the diagram) adopts a flared structure; the second chuck 10 is fitted onto the upper end of the first chuck 9, extending from the straight section to the flared section, and can restrict the downward movement of the first chuck 9 after clamping; the third chuck 11 is the outermost chuck, which is fitted onto the outside of the second chuck 10 and the first chuck 9 and directly abuts against the inner wall of the handle 2, so that the entire chuck is limited; the toothed protrusion 5 is fixed in a ring shape on the outer side wall of the third chuck 11, matching the toothed recess 6; the lower end of the third chuck 11, as shown in the diagram, has ... Figure 4 As shown, the opening diameter is consistent with the center opening of the thrust bearing 4 (with a diameter reduction compared to the portion sleeved outside the first chuck 9), allowing the lower end of the first chuck 9 to abut against the annular platform formed by the third chuck 11. A gap is formed between the first chuck 9 and the third chuck 11, in which a third spring 12 is installed. By passing the tool retractor through the opening at the end of the tool holder 2 and pressing the tail end of the first chuck 9, the upper end of the first chuck 9 is slightly moved upward, releasing the restriction on the serrated blade 1. At the same time, the third spring 12 is compressed during the clamping process. After the tool retractor is removed, the first chuck 9 naturally retracts to its initial position under the restoring force of the third spring 12. If a new serrated blade 1 is installed at this time, it will be clamped and restricted again. The tool retractor is only installed when retracting the tool to prevent the serrated blade 1 from loosening and falling off due to gravity during use.

[0055] A raised ring is also provided on the outside of the tool holder 2 to mount the hole-cutting tool on the tool post of the sliding carriage.

[0056] This cutting tool does not rely on electricity; it achieves the rotation of the serrated blade 1 solely through structural design. Furthermore, it can be used in conjunction with the electric push rod (such as...) already installed on the sliding carriage of a rapid prototyping die-cutting machine. Figure 2 Slightly pressing down and lifting the tool enables the serrated blade 1 to rotate and cut holes, eliminating the need for additional components. This effectively reduces the weight of the cutting tool, thereby decreasing its inertia, improving the response speed and speed change capability of the sliding carriage, ensuring the die-cutting structure of the product remains consistent with the design, and enhancing the die-cutting quality. Automated hole cutting can be effectively achieved by rationally controlling the pressing frequency of the electric actuator.

[0057] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A self-rotating serrated micro-cutting tool for a rapid prototyping die-cutting machine, characterized in that, Includes a serrated blade (1), a collet, a first spring (3), a thrust bearing (4), and a tool holder (2); The serrated blade (1) is clamped in the chuck, and the tip of the serrated blade (1) extends out of the chuck; The chuck is located inside the tool holder (2), with the bottom of the chuck abutting against one side of the thrust bearing (4), and the other side of the thrust bearing (4) abutting against the bottom surface of the tool holder (2) with a first spring (3). The chuck has a toothed protrusion (5) on its outer side wall, and the handle (2) has a toothed recess (6) on its inner side wall that matches the toothed protrusion (5). The width of the toothed recess (6) is greater than the width of the toothed protrusion (5). There is an angle difference between the upper and lower teeth of the toothed protrusion (5). When the serrated blade (1) is not under force, the toothed protrusions (5) and toothed recesses (6) mesh with each other through the upper teeth and separate from each other through the lower teeth; When pressure is applied to the serrated blade (1), the chuck compresses the first spring (3), causing the toothed protrusion (5) to separate from the upper tooth of the toothed recess (6), and the lower tooth of the toothed protrusion (5) enters the lower tooth of the toothed recess (6). Based on the angle difference between the upper and lower teeth, the chuck drives the serrated blade (1) to rotate. When the pressure on the serrated blade (1) is released, the first spring (3) pushes the chuck back, causing the toothed protrusion (5) to separate from the lower tooth of the toothed recess (6), and the toothed protrusion (5) to re-engage with the upper tooth of the toothed recess (6).

2. The self-rotating serrated micro-cutting tool for a rapid prototyping die-cutting machine according to claim 1, characterized in that, The toothed protrusion (5) has 20 teeth on both the upper and lower teeth. The upper teeth are equilateral triangles and the lower teeth are right triangles, with an 18° angle difference between the upper and lower teeth.

3. The self-rotating serrated micro-cutting tool for a rapid prototyping die-cutting machine according to claim 2, characterized in that, The upper teeth of the toothed recess (6) are spaced apart and do not exceed 20 teeth, and the upper teeth are in the shape of an equilateral triangle. The lower teeth of the toothed recess (6) are provided with 20 teeth and are in the shape of a right trapezoid.

4. The self-rotating serrated micro-cutting tool for a rapid prototyping die-cutting machine according to claim 1, characterized in that, The saw blade (1) is provided with a retractable centering device (7), which is concentric with the saw blade (1).

5. The self-rotating serrated micro-cutting tool for a rapid prototyping die-cutting machine according to claim 4, characterized in that, A second spring (8) is provided between the bottom of the centering device (7) and the bottom of the serrated blade (1), and the extension and retraction of the centering device (7) are achieved by the elastic force of the second spring (8).

6. The self-rotating serrated micro-hole cutting tool for a rapid prototyping die-cutting machine according to claim 1, characterized in that, The chucks include a first chuck (9), a second chuck (10) and a third chuck (11) arranged concentrically. The first chuck (9) is sleeved on the outside of the serrated blade (1). The toothed protrusion (5) is disposed on the outer side wall of the third chuck (11). The second chuck (10) is clamped between the first chuck (9) and the third chuck (11).

7. The self-rotating serrated micro-cutting tool for a rapid prototyping die-cutting machine according to claim 6, characterized in that, The top of the first clamp (9) is flared, and the bottom abuts against the third clamp (11). The second clamp (10) is sleeved on the outside of the top of the first clamp (9). A gap is formed between the first clamp (9) and the third clamp (11), and a third spring (12) is provided in the gap.

8. The self-rotating serrated micro-cutting tool for a rapid prototyping die-cutting machine according to claim 7, characterized in that, The third chuck (11) is a hollow structure, and the opening radius of the third chuck (11) between the thrust bearing (4) and the first chuck (9) is consistent with the center opening radius of the thrust bearing (4).

9. The self-rotating serrated micro-hole cutting tool for a rapid prototyping die-cutting machine according to claim 1, characterized in that, The outer wall of the blade holder (2) is provided with a convex ring, and the cutting tool is assembled on the blade holder of the rapid prototyping die-cutting machine through the convex ring.

10. A self-rotating serrated micro-cutting tool for a rapid prototyping die-cutting machine according to claim 9, characterized in that, The blade holder is mounted on the sliding carriage of the rapid prototyping die-cutting machine, and the cutting tool is pressed down by an electric push rod set on the sliding carriage.

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