Glass tube material cutting tool rest with side pressing roller

Abstract

The utility model provides a kind of glass tube material cutting knife rest with side pressure roller, including knife rest and the roller and cutter wheel of symmetrical setting at the bottom of the knife rest, the blade angle of the cutting edge of the cutter wheel is 25-30 °, the roller cylindrical surface is wrapped with elastic layer, the bottom of cutter wheel and the bottom of roller are all set out of the bottom of the knife rest.Compared with prior art, the utility model has the following beneficial effects, by the cooperation of roller and the cutter wheel of symmetrical setting and limiting the blade angle 25-30 °, it solves the technical problems of poor stability, low product quality and poor tool durability of existing single-cutter wheel cutting knife rest.

Description

Technical Field

[0001] This utility model relates to the field of glass processing equipment technology, and in particular to a glass tube cutting tool holder with side pressure rollers. Background Technology

[0002] Glass tubes are a fundamental material in the manufacture of optical instruments, medical devices, and electronic components. The cutting precision of glass tubes directly determines the quality of the fracture surface of the finished product and the efficiency of subsequent processing. In existing technologies, glass tube cutting devices generally adopt a single-blade wheel holder structure, which applies cutting force to the rotating tube through a single point of contact to form a notch.

[0003] The aforementioned single-blade wheel tool holder structure is difficult to meet the requirements of high-precision machining in actual use. Specifically, the outer surface of the glass tube is a continuous curved surface, and the cutting force is highly concentrated at a single contact point during single-blade wheel cutting, which easily leads to radial or axial displacement of the blade wheel. At the same time, the tool holder lacks a lateral restraint mechanism for the tube material, and the tube body will produce significant radial sway under the action of cutting force, resulting in broken cutting lines, uneven depth distribution, and in severe cases, local fracture of the tube body, affecting the controllability of the cutting process.

[0004] The aforementioned defects trigger a chain of quality problems: discontinuous and uneven cutting depths result in excessive surface roughness on the fracture surface, necessitating manual grinding for repair, significantly increasing manufacturing costs and production cycles; the concentrated load on a single cutter wheel accelerates edge wear, reducing the average tool life to only 500 to 800 cuts, leading to frequent replacements, increased equipment downtime, and reduced overall production efficiency. Especially when processing thin-walled glass tubes (wall thickness less than 0.5mm) or highly brittle materials, existing tool holders, due to insufficient precision in cutting pressure adjustment and the lack of a lateral stabilization mechanism, are prone to over-cutting, incomplete cutting, or tube breakage, drastically limiting the equipment's application scope. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a glass tube cutting tool holder with side pressure rollers, which solves the technical problems of poor stability, low product quality, and poor tool durability of existing single-blade wheel cutting tool holders.

[0006] According to an embodiment of this utility model, a glass tube cutting tool holder with a side pressure roller is provided, comprising a tool holder and rollers and a cutting wheel symmetrically arranged at the bottom of the tool holder. The cutting edge angle of the cutting wheel is 25-30°. An elastic layer is wrapped on the cylindrical surface of the roller. The bottom of the cutting wheel and the bottom of the roller both extend beyond the bottom of the tool holder.

[0007] The technical principle of this invention is as follows: The blade holder is fixed to the cutting equipment, which controls the blade holder to move along the axis of the glass tube or drives the glass tube to rotate on its own. During this process, the blade holder needs to apply a cutting pressure of 2-15N to the glass tube. At this time, both the blade wheel and the roller are in close contact with the surface of the glass tube. The blade wheel gradually cuts the glass tube during the aforementioned rotation or movement. Due to the symmetrical distribution of the blade wheel and roller, the reaction force of the glass tube on the two blade wheels is equal in magnitude and opposite in direction (symmetrical along the radial direction of the tube material), thus canceling each other out and preventing the blade wheel and blade holder from shifting. This ensures that after cutting, the glass tube breaks along a symmetrical cutting line. Based on this, combined with a cutting angle of 25-30°, the flatness error of the fracture surface can be controlled within 0.05mm.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] 1. Because the cutting wheel and roller cooperate symmetrically to offset the offset force, the continuity of the cutting line is improved by more than 90%, resulting in a depth deviation of ≤0.03mm, thereby ensuring cutting stability.

[0010] 2. Because the flatness error of the fracture surface is ≤0.05mm, the quality of the cut product is guaranteed, so no subsequent grinding is required, which improves the processing efficiency by 30%-50%.

[0011] 3. Because the force on the cutter wheel is stable and the wear rate is slowed down, the service life of the cutter wheel is extended to 1000-1500 cuts, which is 1.5-2 times that of the traditional single cutter wheel.

[0012] 4. This application avoids the offset of the cutter wheel and cutter holder, making it applicable to glass tubes with a diameter of 3-10mm, and also supporting the cutting of tubes with a wall thickness of 0.3-1mm.

[0013] In summary, by using rollers in conjunction with symmetrically arranged cutting wheels and limiting the cutting angle to 25-30°, the technical problems of poor stability, low product quality, and poor tool durability of existing single-wheel cutting tool holders are solved.

[0014] Furthermore, the bottom of the tool holder is symmetrically provided with two protrusions, and the two protrusions are provided with round holes. The bottom of the tool holder is provided with a groove, and the roller and the cutter wheel are installed in the groove. The roller and the cutter wheel are provided with mounting shafts at their centers, and the two mounting shafts are respectively passed through the round holes.

[0015] Furthermore, the bottom of the tool holder has baffles on both sides of the round holes, and the top center of the baffles is connected to the tool holder by a fixing screw, and the bottom of the baffles covers the two round holes.

[0016] By setting a baffle to limit the installation shaft, the installation of the roller and the cutter wheel is realized, which greatly improves the efficiency of cutter wheel disassembly and assembly, and the cutter wheel can be replaced within 2-3 minutes.

[0017] Furthermore, the two side walls of the groove are provided with two steps along the width direction of the tool holder, forming two different groove widths. The side with the smaller groove width corresponds to the tool wheel, and the side with the larger groove width corresponds to the roller.

[0018] Furthermore, the cutting edge has an isosceles triangular structure with the apex angle being the cutting edge angle, and the cutting wheel is made of tungsten carbide with a thickness of 0.6-1.2mm.

[0019] The isosceles triangular cutting edge configuration helps to further stabilize the cutter wheel and tool holder.

[0020] Furthermore, the elastic layer of the roller is made of polytetrafluoroethylene, and the thickness of the roller is 2-4mm.

[0021] Furthermore, both the roller and the cutter wheel have mating holes at their centers. The mating hole of the roller is fitted with the mounting shaft via a transition fit, the mating hole of the cutter wheel is fitted with the mounting shaft via a clearance fit, and the mounting shaft is fitted with the round hole via a clearance fit.

[0022] The clearance fit of the cutter wheel serves to protect the cutter wheel, while the transition fit of the roller is used to ensure the direction of movement of the roller and prevent the cutter wheel and the tool holder from shifting.

[0023] Furthermore, the fit tolerance between the mating hole of the roller and the mounting shaft is H7 / g6.

[0024] Furthermore, the gap between the mating hole of the cutter wheel and the mounting shaft is 0.005-0.02mm. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the glass tube cutting tool holder structure according to an embodiment of the present utility model.

[0026] Figure 2 This is a front view of the glass tube cutting tool holder according to an embodiment of the present utility model.

[0027] Figure 3 This is a schematic diagram of the groove structure according to an embodiment of the present utility model.

[0028] Figure 4 This is a cross-sectional view of the roller structure according to an embodiment of the present utility model.

[0029] Figure 5 This is a cross-sectional view of the cutter wheel according to an embodiment of the present invention.

[0030] Figure 6 This is a cross-sectional view of the baffle structure according to an embodiment of the present invention.

[0031] In the above figures: 1. Tool holder; 101. Protrusion; 11. Groove; 12. Circular hole; 2. Roller; 21. Elastic layer; 3. Tool wheel; 31. Cutting blade; 4. Mounting shaft; 41. Mating hole; 5. Baffle; 51. Fixing screw. Detailed Implementation

[0032] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0033] like Figure 1 The glass tube cutting tool holder with side pressure rollers shown includes a tool holder 1 and rollers 2 and cutting wheels 3 symmetrically arranged at the bottom of the tool holder 1. The bottom of the cutting wheel 3 and the bottom of the roller 2 are both set beyond the bottom of the tool holder 1 to ensure that only rollers 2 and cutting wheels 3 can contact the glass tube.

[0034] like Figure 1-3 As shown, the bottom of the tool holder 1 has two symmetrically integrally formed protrusions 101, and the two protrusions 101 are provided with round holes 12. The bottom of the tool holder 1 is provided with a groove 11, and the roller 2 and the cutter wheel 3 are installed in the groove 11. The roller 2 and the cutter wheel 3 are provided with mounting shafts 4 at their centers. The two mounting shafts 4 are respectively passed through the round holes 12, and the mounting shafts 4 and the round holes 12 are both clearance fit, and the clearance is 0.005-0.02mm.

[0035] Specifically, both roller 2 and cutter wheel 3 are provided with mating holes 41 at their centers. The mating hole 41 of roller 2 and the mounting shaft 4 adopt a transition fit with a fit tolerance of H7 / g6. The mating hole 41 of cutter wheel 3 and the mounting shaft 4 adopt a clearance fit with a clearance of 0.005-0.02mm.

[0036] like Figure 3-5 As shown, the two side walls of the groove 11 are provided with two steps along the width direction of the tool holder 1, forming two different groove widths. The side with the smaller groove width corresponds to the cutter wheel 3, and the side with the larger groove width corresponds to the roller 2. This allows the groove 11 to accommodate rollers 2 and cutter wheels 3 of different widths and diameters. Specifically, the thickness of the cutter wheel 3 is 0.6-1.2mm, and the thickness of the roller 2 is 2-4mm. In actual use, a 0.6mm cutter wheel 3 can be used in conjunction with a 2mm roller 2 to avoid misalignment between the cutter wheel 3 and the tool holder 1.

[0037] like Figure 3-5As shown, the cutting blade 31 has an isosceles triangular structure, with the apex angle being the cutting edge angle of the cutting blade 31. The cutting edge angle is 25-30°, with 30° being optimal. This ensures stable pressure on both sides of the cutter wheel 3, which helps extend the service life of the cutter wheel 3 and ensures the cutting stability of the cutter wheel 3. The cutter wheel 3 is made of tungsten carbide with a hardness of HRC90-92, which can cut glass. The cylindrical surface of the roller 2 is covered with an elastic layer 21. The elastic layer 21 is made of polytetrafluoroethylene, which has a low coefficient of friction and a certain degree of elasticity, which can prevent scratching the glass tube and affecting the cutting quality.

[0038] like Figure 1-6 As shown, the bottom of the tool holder 1 has a round hole 12 and baffles 5 on both sides. The top center of the baffles 5 is connected to the tool holder 1 by a fixing screw 51. The bottom of the baffles 5 covers the two round holes 12. When it is necessary to disassemble the tool wheel 3, simply loosen the fixing screw 51 on one side and then rotate the baffles 5 to remove the mounting shaft 4 of the tool wheel 3. Then replace the tool wheel 3. To install, simply put the new tool wheel 3 and mounting shaft 4 back, rotate the baffles 5 back to cover the round holes 12, and finally tighten the fixing screws 51.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A glass tube cutting tool holder with side pressure rollers, characterized in that: It includes a tool holder and rollers and a cutting wheel symmetrically arranged at the bottom of the tool holder. The cutting edge angle of the cutting wheel is 25-30°. The cylindrical surface of the roller is covered with an elastic layer. The bottom of the cutting wheel and the bottom of the roller both extend beyond the bottom of the tool holder.

2. The glass tube cutting tool holder with side pressure rollers as described in claim 1, characterized in that: The bottom of the tool holder is symmetrically provided with two protrusions, and the two protrusions are provided with round holes. The bottom of the tool holder is provided with a groove, and the roller and the cutter wheel are installed in the groove. The roller and the cutter wheel are provided with mounting shafts at their centers, and the two mounting shafts are respectively passed through the round holes.

3. A glass tube cutting tool holder with side pressure rollers as described in claim 2, characterized in that: The bottom of the tool holder has a round hole on both sides and a baffle plate is provided. The top center of the baffle plate is connected to the tool holder with a fixing screw, and the bottom of the baffle plate covers the two round holes.

4. A glass tube cutting tool holder with side pressure rollers as described in claim 2 or 3, characterized in that: The two side walls of the groove are provided with two steps along the width direction of the tool holder, forming two different groove widths. The side with the smaller groove width corresponds to the tool wheel, and the side with the larger groove width corresponds to the roller.

5. A glass tube cutting tool holder with side pressure rollers as described in claim 4, characterized in that: The cutting edge is an isosceles triangle with the apex angle being the cutting edge angle. The cutting wheel is made of tungsten carbide and has a thickness of 0.6-1.2 mm.

6. A glass tube cutting tool holder with side pressure rollers as described in claim 4, characterized in that: The elastic layer of the roller is made of polytetrafluoroethylene, and the thickness of the roller is 2-4mm.

7. A glass tube cutting tool holder with side pressure rollers as described in claim 2, characterized in that: Both the roller and the cutter wheel have mating holes at their centers. The mating hole of the roller is fitted with the mounting shaft via an intermediate fit, while the mating hole of the cutter wheel is fitted with the mounting shaft via a clearance fit. Both the mounting shaft and the round hole are fitted with clearance fits.

8. A glass tube cutting tool holder with side pressure rollers as described in claim 7, characterized in that: The fit tolerance between the mating hole of the roller and the mounting shaft is H7 / g6.

9. A glass tube cutting tool holder with side pressure rollers as described in claim 7, characterized in that: The clearance between the mating hole of the cutter wheel and the mounting shaft is 0.005-0.02mm.

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