A chip collecting punch

Abstract

The present invention discloses a chip-collecting punching tool, comprising a punching tool main part, wherein an inverted tapered punching tool blade is provided at the lower end of the punching tool main part, wherein the punching tool main part is longitudinally penetrated to form a material collecting channel, wherein an expansion channel is provided in the punching tool blade from bottom to top and gradually increases in size, wherein a material collecting opening is penetrated at the lower end of the expansion channel, wherein the largest end of the expansion channel has the same diameter as the material collecting channel, and the expansion channel is connected to the material collecting channel, and wherein at least one air guide hole is provided at the side end of the punching tool main part. The present invention can be connected to the material collecting channel through the air guide hole, wherein the air guide hole is at a certain distance from the material collecting opening, and under the action of negative pressure, air flow is sucked in from the air guide hole, and waste material slightly lower than the air guide hole is brought up, discharged and collected for centralized treatment, and the punching resistance of multi-layer materials during punching is reduced through the transition of the expansion channel, especially the punching resistance when punching multi-layer materials, thereby achieving the punching of more layers simultaneously.

Description

Technical Field

[0001] The invention relates to the technical field of leather processing, in particular to a chip-collecting punching cutter. Background Art

[0002] In the leather material cutting industry, the punching mechanism of current cutting equipment is equipped with a punching blade with a side discharge structure. By milling a discharge trough with an arc structure at the rear end of the punching blade, the debris punched out of the collection port is continuously squeezed and pushed toward the discharge port. The centrifugal force generated by the high-speed rotation of the punching blade then ejects the debris overflowing from the side discharge port. In actual application, when using a punching blade with this structure, when dealing with materials with different properties, especially those with inherent elasticity, the punched waste easily conflicts with the inner wall, resulting in common problems such as material blockage, scraping, failure to punch through, and material retention. A more common problem is that as the punch passes through the side discharge port, the waste generated by the punching is scattered on the surface of the processed material. As the number of punchings increases, the generated debris gradually accumulates on the surface of the material, causing the punching process to end. When the material is manually collected, the punching waste generated is small and large, requiring a lot of time to clean up the punching waste, reducing the working efficiency of the entire equipment. Summary of the Invention

[0003] The purpose of the present invention is to provide a chip collecting punching cutter which has the advantage of simple structure and solves the problems of material blocking, material scraping, failure to punch through and failure to carry away the material inside the punching cutter.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a chip-collecting punching tool, comprising a punching tool main part, an inverted tapered punching tool blade is provided at the lower end of the punching tool main part, the punching tool main part is longitudinally penetrated to form a material collection channel, an expansion channel is provided between the punching tool blades and gradually increases from bottom to top, a material collection opening is penetrated at the lower end of the expansion channel, and the expansion channel is connected to the material collection channel, and at least one air guide hole is provided at the side end of the punching tool main part.

[0005] In the present invention, the distance between the air guide hole and the bottom of the punching blade is 4mm-12mm.

[0006] In the present invention, the inner diameter of the expansion channel gradually increases from bottom to top.

[0007] In the present invention, the cross section of the expansion channel is in the shape of an isosceles trapezoid with a larger upper end and a smaller lower end.

[0008] In the present invention, the cross-section of the expansion channel is symmetrically arranged in stages, and the distance between the two steps increases from bottom to top.

[0009] In the present invention, the upper end of the collecting channel is used to connect with a suction mechanism.

[0010] In the present invention, the punching blade main part is connected to the punching blade as a whole.

[0011] A punching device, wherein the punching knife main part is installed on the punching assembly.

[0012] In the present invention, the air guide holes can be in various shapes such as strip, circle or ellipse.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The present invention sets an expansion channel, and the punch blade presses against the leather material, punching out holes in the leather material, and the waste material punched out enters the expansion channel. The expansion channel has a structure from bottom to top and from small to large, so that the waste material punched out can be expanded to the maximum state in the expansion channel according to its elasticity, preventing the waste material from falling out from the collecting port at the lower end of the punch blade, and the waste material does not conflict with the expansion channel, preventing the waste material from being blocked in the punch assembly, thereby solving the problems of scraping material, not being able to punch through, and not being able to carry the material away.

[0015] 2. The present invention sets air guide holes and a collecting channel, which is connected to a suction mechanism. The suction mechanism sucks air from the collecting channel and the expansion channel. Air enters from the collecting port and the air guide holes. The airflow enters from the air guide holes to split the resistance between the waste and the inner wall of the collecting channel, thereby reducing the resistance. The upper half of the resistance does not affect the suction mechanism from sucking it away in time, and the lower half of the resistance does not affect the waste from entering the collecting port, thereby driving the waste located in the collecting channel and the expansion channel to move and be discharged from the upper end of the punch main part, thereby preventing the waste from accumulating in the punch and causing blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of embodiment 1 of the present invention;

[0017] Figure 2 is a cross-sectional view of embodiment 1 of the present invention;

[0018] Figure 3 This is a structural diagram of embodiment 2 of the present invention;

[0019] Figure 4 is a cross-sectional view of a second embodiment of the present invention;

[0020] Figure 5 This is a structural diagram of embodiment 3 of the present invention;

[0021] Figure 6 is a cross-sectional view of embodiment 3 of the present invention;

[0022] Figure 7 This is a structural diagram of a fourth embodiment of the present invention;

[0023] Figure 8 is a cross-sectional view of a fourth embodiment of the present invention;

[0024] Figure 9 This is a structural diagram of Embodiment 5 of the present invention;

[0025] Figure 10 is a cross-sectional view of a fifth embodiment of the present invention;

[0026] Figure 11 This is a structural diagram of embodiment 6 of the present invention;

[0027] Figure 12 is a cross-sectional view of embodiment 6 of the present invention;

[0028] Figure 13 This is a structural diagram of Embodiment 7 of the present invention;

[0029] Figure 14 This is a cross-sectional view of embodiment 7 of the present invention.

[0030] The reference numerals and names in the figures are as follows:

[0031] 1. Punch blade main part; 2. Punch blade; 3. Collecting channel; 4. Expansion channel; 5. Collecting port; 6. Air guide hole. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] See also Figures 1 to 2 The first embodiment provided by the present invention is a chip collecting punching tool, comprising a punching tool main part 1, an inverted tapered punching tool blade 2 is provided at the lower end of the punching tool main part 1, the punching tool main part 1 is longitudinally penetrated to form a collecting channel 3, and an expansion channel 4 is provided in the punching tool blade 2. The cross section of the expansion channel 4 is symmetrically arranged in stages, and the distance between the two steps increases from bottom to top. A collecting opening 5 is provided at the lower end of the expansion channel 4, and the collecting opening 5 can cooperate with the punching tool blade 2 to punch the leather material, and the punched waste enters the expansion channel 4 from the collecting opening 5. The largest end of the expansion channel 4 has the same diameter as the collecting channel 3, and the expansion channel 4 is connected to the collecting channel 3. There is at least one air guide hole 6 at the side end of the punching tool main part 1. The air guide hole 6 in this embodiment is a circular hole, and the aperture of the air guide hole 6 is smaller than the aperture of the collecting opening 5.

[0034] Furthermore, after the waste enters the expansion channel 4, it rises layer by layer from the small end of the expansion channel 4. With each rising layer, the waste expands toward the circumference. When it rises to the aggregate channel 3, the waste will not fall into the stepped layer at the small end. The waste expands to its maximum state and does not conflict with the expansion channel 4 or the aggregate channel 3, preventing conflict and blockage. During the downward movement of the punching cutter main part 1, each time a layer is punched through, the waste generated by the punching squeezes the waste generated by the previous punching upward, pushing it from the aggregate port 5 to the expansion channel 4. Under the action of the negative pressure in the expansion channel 4, the waste is sucked away by the suction mechanism through the aggregate channel 3 and the rear end closed channel.

[0035] Furthermore, due to the degree of compression deformation of the leather material surface during punching, the punching deformation in a single punch is smaller than when the existing punching knife punches the same number of layers of material; while ensuring the same punching deformation, the punching knife main part 1 can punch more layers.

[0036] Furthermore, the distance between the air guide hole 6 and the bottom of the punch blade 2 is 4mm-12mm. This distance allows the airflow to carry the waste material with maximum efficiency. By increasing the distance between the air guide hole 6 and the bottom of the punch blade 2, the air guide hole 6 is prevented from scratching the leather material.

[0037] Furthermore, the collecting channel 3 is used to connect the suction mechanism, which is used to suck air into the expansion channel 4 and the collecting channel 3. The air enters from the collecting port 5 and the air guide hole 6, and the air flow drives the waste in the punch main part 1 to be extracted from the air guide hole 6.

[0038] See also Figures 3 and 4 The second embodiment provided by the present invention: the expansion channel 4 of this embodiment is symmetrically stepped, and the air guide hole 6 is elliptical.

[0039] See also Figures 5 and 6 The third embodiment provided by the present invention is provided with two air guide holes 6, both of which are transverse strips. One air guide hole 6 is located on the punch blade 2 and is connected to the expansion channel 4, and the other air guide hole 6 is located on the punch main part 1 and is connected to the collection channel 3. Air can be guided through both air guide holes 6, and the incoming high-speed airflow disrupts the tight fit between the waste layers. The airflow then drives the waste back to the suction mechanism through the collection channel, thereby increasing chip removal efficiency.

[0040] See also Figures 7 and 8 The fourth embodiment provided by the present invention: the cross-section of the expansion channel 4 of this embodiment is an isosceles trapezoidal shape with a larger upper end and a smaller lower end. The expansion channel 4 has a smooth curved surface, a small-angle conical surface and other structures. By making a smooth transition, waste is prevented from falling from the collection port 5 and the waste is discharged through the air guide hole 6.

[0041] See also Figures 9 and 10The fifth embodiment provided by the present invention: The air guide holes 6 of this embodiment are longitudinal strips, which reduce the negative pressure required for suction and reduce the cost of the suction mechanism. The higher the negative pressure value of the suction mechanism, the larger the subsequent unit will be, which is expensive.

[0042] See also Figures 11 to 12 The sixth embodiment provided by the present invention: This embodiment is provided with two air guide holes 6, which are formed by the rotating knife obliquely penetrating the punching knife main part 1.

[0043] See also Figures 13 and 14 The seventh embodiment of the present invention provides two symmetrical air guide holes 6 on the main punching blade 1. These two air guide holes 6 are longitudinal strips, and the cross-section of the extension channel 4 is an isosceles trapezoidal shape with a larger upper end and a smaller lower end. The above embodiments are all designed to reduce the negative pressure required for material suction. Some of the air guide holes are blunted to reduce scratches on the material.

[0044] The present invention connects the material collecting channel 3 to the material suction mechanism, creating a negative pressure inside the punching blade main component 1, drawing out the waste material inside the punching blade main component 1 and collecting it centrally, preventing the waste material from being discharged in an undirected manner onto the leather processing surface. Manual material collection eliminates the need to waste time cleaning the punching waste, significantly improving the processing efficiency of the equipment using the present invention.

[0045] The present invention provides an expansion path 4 which is a gradually expanding transition structure, thereby reducing punching resistance, especially punching multi-layer materials. Under the same force, the present invention can punch more layers of materials.

[0046] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A chip collecting punching tool, comprising a punching tool main part (1), characterized in that: The lower end of the punching blade main part (1) is provided with an inverted conical punching blade (2), and the punching blade main part (1) is longitudinally penetrated to form a collecting channel (3). An expansion channel (4) is provided between the punching blade (2) and the collecting channel (3), and the expansion channel (4) is gradually enlarged from bottom to top. The lower end of the expansion channel (4) is penetrated by a collecting opening (5), and the expansion channel (4) is connected to the collecting channel (3). At least one air guide hole (6) is provided at the side end of the punching blade main part (1); the upper end of the collecting channel (3) is used to connect to a suction mechanism.

2. The chip collecting punch according to claim 1, characterized in that: The distance between the air guide hole (6) and the bottom of the punching blade (2) is 4 mm to 12 mm.

3. The chip collecting punch according to claim 1, characterized in that: The cross section of the expansion channel (4) is in the shape of an isosceles trapezoid with a larger upper end and a smaller lower end.

4. The chip collecting punch according to claim 1, characterized in that: The cross-section of the expansion path (4) is symmetrically arranged in stages, and the two stepped expansion paths (4) become larger layer by layer from bottom to top.

5. The chip collecting punch according to claim 1, characterized in that: The punching blade main part (1) and the punching blade (2) are connected as one body.

6. A punching device, characterized in that: The invention comprises the chip collecting punch according to any one of claims 1 to 5, wherein the chip collecting punch is installed on a punching assembly.

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