Machining method of insert roller cutter
By assembling roller cutters through machining and heat fitting processes, the problems of high manufacturing cost and unstable insert positioning of existing roller cutters have been solved, realizing the manufacturing of high-precision, low-cost insert roller cutters and improving the service life and wear resistance of roller cutters.
Patent Information
- Application Number
- CN202610108483.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-27
- Publication Date
- 2026-03-06
AI Technical Summary
Existing roller cutters suffer from high manufacturing costs, easy detachment of inserts, and low positioning accuracy. In particular, integral carbide roller cutters are expensive and difficult to process, while ordinary steel roller cutters are prone to cracking due to the surface overlay of carbide layers, and insert-type roller cutters have unstable insert fixation.
One side roller bearing seat, a cemented carbide insert sleeve, and another side roller bearing sleeve seat are manufactured using machining methods. The cemented carbide insert sleeve is assembled with the central rotating shaft through a heat fitting process. High-hardness alloy material and the principle of thermal expansion and contraction are used to achieve precise positioning, reduce manufacturing costs, and improve the reliability of the insert.
This technology achieves high-precision and reliable positioning of the insert roller cutter, reduces manufacturing costs, and improves the service life of the roller cutter and the wear resistance of the insert.
Smart Images
Figure CN121607715A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of roller cutter processing, specifically to a processing method for a block roller cutter. Background Technology
[0002] A roller cutter is a cylindrical cutting tool typically mounted in a roller die-cutting machine, used to cut materials by rotation. Roller cutters are suitable for precise cutting of continuous materials such as paper, tape, and fabric. The die of a roller cutter is usually made of high-quality high-speed steel or cemented carbide, offering excellent wear resistance and cutting precision. The shape and angle of the roller cutter die can be customized according to the characteristics and requirements of the material being cut to ensure cutting quality and efficiency.
[0003] In the existing technology, roller cutters used for die-cutting operations are divided into three categories: solid carbide roller cutters, ordinary steel roller cutters, and insert roller cutters. Among them, solid carbide roller cutters are expensive, difficult to process, and brittle, making them prone to chipping. Ordinary steel roller cutters are prone to cracking when the carbide layer is welded onto the surface, resulting in insufficient bonding strength. Insert roller cutters are mechanically fixed or welded after processing, which has problems such as easy detachment of inserts and low positioning accuracy (above ±0.1mm).
[0004] Therefore, there is an urgent need to develop a machining method for insert roller cutters that can reduce the manufacturing cost of roller cutters and ensure reliable installation of inserts, so that insert roller cutters can work stably, reliably and for a long time. Summary of the Invention
[0005] To address the aforementioned problems, this invention provides a method for processing insert roller cutters, which reduces the manufacturing cost of roller cutters and ensures high-precision and reliable positioning of inserts.
[0006] A method for processing a roller cutter with inserts, characterized in that: it includes a side roller seat with an integrated central rotating shaft, a cemented carbide insert sleeve, and a side roller sleeve seat. The independent side roller seat, cemented carbide insert sleeve, and side roller sleeve seat are obtained through machining. The side roller seat is placed on a mounting bracket. The cemented carbide insert sleeve is then heated and fitted along the central rotating shaft, tightly against the side roller seat. Finally, the other side roller sleeve seat is fitted along the central rotating shaft while still heated, tightly against the other end face of the cemented carbide insert sleeve. Assembly is completed when the three sets of parts cool to room temperature. The cemented carbide insert sleeve is made of a high-hardness alloy.
[0007] Its further features are: The materials of the one-side roller bearing seat and the other-side roller sleeve bearing seat are both DC53 steel with a hardness of HRC58~63. The carbide insert sleeve is made of S290 carbide with a steel hardness of HRC65-68, which gives the insert excellent wear resistance and improves the service life of the entire roller cutter. The carbide insert sleeve is quickly fitted onto the central rotating shaft while heated, with one end of the carbide insert sleeve tightly against the corresponding end face of one side roller seat. After the carbide insert sleeve cools down naturally, the other side roller seat is heated and quickly fitted onto the central rotating shaft, tightly against the other end face of the carbide insert sleeve. After that, it is allowed to cool down naturally to complete the assembly. The surface roughness of the exposed annular surface of the central rotating shaft is the same as that of the inner annular wall of the carbide insert sleeve and the other side roller sleeve seat, which is 0.6 to 1.0, which makes the heat fitting reliable and stable. The exposed annular surface of the central rotating shaft, the inner annular wall of the carbide insert sleeve, and the inner annular wall of the other roller sleeve seat are all obtained by mechanical removal. The carbide insert sleeve is kept at 160℃~180℃ for 20min~30min, then the carbide insert sleeve is taken out and quickly aligned and fitted onto the center rotating shaft of one side roller seat. The other roller sleeve seat is kept at 150-16℃ for 15-25 minutes. Then the other roller sleeve seat is removed. At this time, the carbide insert sleeve is cooled to room temperature. The other roller sleeve seat is quickly aligned and fitted onto the central rotating shaft of the one roller seat, and arranged in close contact with the carbide insert sleeve. Roller seats are provided on both one side roller seat and the other side roller sleeve seat. The outer end of each roller seat is provided with an inner concave thread positioning hole for connecting a gear. The gear can be fixed on the corresponding side according to the actual situation to complete the power input transmission. After wear, the carbide insert sleeve can be removed by heating, allowing for replacement.
[0008] With this invention, the cemented carbide insert sleeve is made of high-hardness alloy, while the one-side roller bearing seat and the other-side roller bearing sleeve seat are made of ordinary alloy, which reduces the overall manufacturing cost. After the three are manufactured independently, the cemented carbide insert sleeve and the other-side roller bearing sleeve seat are respectively fitted onto the central rotating shaft through a heat fitting process. This allows the cemented carbide insert sleeve to achieve precise positioning through thermal expansion and contraction, which reduces the manufacturing cost of the roller cutter and ensures high-precision and reliable positioning of the insert. Attached Figure Description
[0009] Figure 1 This is an assembly diagram of the present invention; The names corresponding to the serial numbers are as follows: Internal concave thread positioning hole 1; One side roller seat 10, central rotating shaft 11, hard alloy insert sleeve 20, and the other side roller sleeve seat 30. Detailed Implementation
[0010] A method for machining a padded roller cutter, see Figure 1 It includes a side roller seat 10 with an integrated central rotating shaft 11, a cemented carbide insert sleeve 20, and a side roller sleeve seat 30. The independent side roller seat 10, cemented carbide insert sleeve 20, and side roller sleeve seat 30 are obtained by machining. The side roller seat 10 is placed on a mounting bracket. Then, the cemented carbide insert sleeve 20 is heated and placed along the central rotating shaft 11 and tightly against the side roller seat 10. Finally, the other side roller sleeve seat 30 is placed along the central rotating shaft 11 while heated and tightly against the other end face of the cemented carbide insert sleeve 20. The assembly is completed when the three sets of parts cool to room temperature. The cemented carbide insert sleeve is made of high hardness alloy.
[0011] In practice, the materials of one side roller bearing seat 10 and the other side roller bearing sleeve seat 30 are both DC53 steel with a hardness of HRC58~63. The cemented carbide insert sleeve 20 is made of S290 cemented carbide with a steel hardness of HRC65-68, which gives the insert excellent wear resistance and improves the service life of the entire roller cutter.
[0012] In practice, the surface roughness of the exposed annular surface of the central rotating shaft 11 is the same as that of the inner annular wall of the hard alloy insert sleeve 20 and the other side roller sleeve seat 30, which is 0.8, thus ensuring that the heat fitting is reliable and stable. The exposed annular surface of the central rotating shaft 11, the inner annular wall of the carbide insert sleeve 20, and the inner annular wall of the roller sleeve seat 30 on the other side are all obtained by mechanical removal. The carbide insert sleeve 20 is kept at 180°C for 20 minutes. After that, the carbide insert sleeve 20 is taken out and quickly aligned and fitted onto the central rotating shaft 11 of the side roller seat 10. The other roller sleeve seat 30 is kept at 1560℃ for 15 minutes. Then the other roller sleeve seat 30 is taken out. At this time, the hard alloy insert 20 sleeve is cooled to room temperature. The other roller sleeve seat 30 is quickly aligned and fitted onto the central rotating shaft 11 of the one roller seat 10 and arranged in close contact with the hard alloy insert sleeve 20.
[0013] In practice, roller seats are provided on one side of roller seat 10 and the other side of roller sleeve seat 30. The outer end of each roller seat is provided with an inner concave thread positioning hole 1 for connecting an external gear. According to the actual situation, the gear is fixed on the corresponding side to complete the power input transmission.
[0014] In practice, the carbide insert sleeve 20 can be removed by heating after wear, so that the carbide insert sleeve 20 can be replaced.
[0015] The principle is as follows: the carbide insert sleeve is made of high-hardness alloy, while the roller bearing seat on one side and the roller bearing sleeve seat on the other side are made of ordinary alloy, which reduces the overall manufacturing cost. After the three are manufactured independently, the carbide insert sleeve and the roller bearing sleeve seat on the other side are respectively fitted onto the central rotating shaft through a heat fitting process. This allows the carbide insert sleeve to achieve precise positioning through thermal expansion and contraction, which reduces the manufacturing cost of the roller cutter and ensures high-precision and reliable positioning of the insert.
[0016] 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 implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0017] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A method of machining a segment roller cutter, characterised in that: It includes one side roller shaft seat integrated with a central rotating shaft, a hard alloy insert sleeve, and the other side roller shaft sleeve seat, which are independently processed by machining, the one side roller shaft seat is placed on a mounting bracket, then the hard alloy insert sleeve is heated, the hard alloy insert sleeve is sleeved along the central rotating shaft and arranged closely to the roller shaft seat, and finally the other side roller shaft sleeve seat is sleeved along the central rotating shaft in a heated state and arranged closely to the other end surface of the hard alloy insert sleeve, until the three parts are cooled to room temperature to complete the assembly, and the hard alloy insert sleeve is a high-hardness alloy.
2. A method of machining an insert roll tool according to claim 1, characterized in that: The material of the one side roller shaft seat and the other side roller shaft sleeve seat is DC53 steel, and the steel hardness is HRC 58-63.
3. The method of claim 1, wherein: The material of the hard alloy insert sleeve is S290 hard alloy, and the steel hardness is HRC 65-68.
4. The method of claim 1, wherein: The hard alloy insert sleeve is quickly sleeved on the central rotating shaft in a heated state, and one end of the hard alloy insert sleeve is closely arranged to the corresponding end surface of the one side roller shaft seat, then the other side roller shaft sleeve seat is heated and quickly sleeved on the central rotating shaft and closely arranged to the other end surface of the hard alloy insert sleeve, and then natural cooling is waited to complete the assembly.
5. The method of claim 1, wherein: The surface roughness of the exposed ring surface of the central rotating shaft and the inner ring wall of the hard alloy insert sleeve and the other side roller shaft sleeve seat are the same, and are 0.6-1.
0.
6. The method of claim 1, wherein: The exposed ring surface of the central rotating shaft, the inner ring wall of the hard alloy insert sleeve, and the inner ring wall of the other side roller shaft sleeve seat are processed by mechanical removal method.
7. The method of claim 4, wherein: The hard alloy insert sleeve is kept in an environment of 160-180℃ for 20-30 minutes, then the hard alloy insert sleeve is taken out, and the hard alloy insert sleeve is quickly aligned and sleeved on the central rotating shaft of the one side roller shaft seat.
8. A method of machining an insert roll tool according to claim 7, characterized in that: The other side roller shaft sleeve seat is kept in an environment of 150-160℃ for 15-25 minutes, then the other side roller shaft sleeve seat is taken out, at this time the hard alloy insert sleeve is cooled to room temperature, the other side roller shaft sleeve seat is quickly aligned and sleeved on the central rotating shaft of the one side roller shaft seat and closely arranged to the hard alloy insert sleeve.
9. The method of claim 1 wherein: The one side roller shaft seat and the other side roller shaft sleeve seat are provided with roller shaft seats, the outer ends of the roller shaft seats are provided with inner recessed thread positioning holes of the ring cloth, the inner recessed thread positioning holes are used for external gear, and according to actual conditions, gears are fixed on the corresponding side, so that power input transmission is completed.
10. The method of claim 1, wherein: The hard alloy insert sleeve can be taken out by heating after wear, so that the hard alloy insert sleeve can be replaced.