A milling cutter with quick replaceable inserts

Abstract

The utility model discloses a milling cutter that blade can be quickly replaced, including fixed link, the fixed link bottom is provided with the tool rest, and the tool rest bottom is provided with a plurality of fixed slots, and the fixed link outer wall is provided with fixed component, including top plate, spring, lifting plate and plug rod, and the top plate fixed sleeve is connected in the fixed link outer wall, and the spring sleeve is connected in the fixed link outer wall, and the lifting plate can slide sleeve is connected in the fixed link outer wall, and the spring upper and lower end is fixedly connected with top plate and lifting plate respectively, and the plug rod sets up in the lifting plate bottom, and the tool rest top is provided with the through -hole and extends to the fixed slot inner chamber, and the sliding block top is provided with fixed hole, and the plug rod can insert the through -hole and fixed hole and fix the sliding block. The utility model can shorten the blade replacement time significantly, improve production efficiency, can also reduce the labor intensity of operator, reduce the quality problem caused by the improper bolt fastening.

Description

Technical Field

[0001] This utility model relates to the field of milling cutter technology, specifically to a milling cutter with quick-change inserts. Background Technology

[0002] As a key tool in the machining field, the performance of milling cutters directly affects machining efficiency, accuracy, and workpiece surface quality. With the increasing demand for high-efficiency and high-precision machining in modern manufacturing, milling cutter technology has continued to develop, gradually evolving from solid milling cutters to indexable milling cutters, allowing the inserts to be replaced individually after wear, greatly improving the economy and service life of the tools.

[0003] Currently, most indexable end mills on the market use bolt fixing, where the inserts are secured to the tool holder's grooves with bolts. While this fixing method is simple in structure and provides a secure connection, it has significant drawbacks: First, changing inserts requires using special tools to completely loosen or tighten the bolts, making the operation cumbersome, especially when changing multiple inserts on multi-tooth end mills, which is time-consuming; second, frequent disassembly and assembly can easily lead to thread wear or bolt fatigue fracture; third, in harsh machining environments, the bolts are easily contaminated by chips or corroded by coolant, increasing the difficulty of disassembly; fourth, in high-precision machining, inconsistent bolt tightening force can lead to differences in insert installation accuracy, affecting machining quality.

[0004] Furthermore, in mass production environments, tool changeover time directly impacts equipment utilization and production efficiency. Statistics show that in some precision machining fields, tool changeover time can account for 5%-15% of total production time. Using traditional bolt-fixed milling cutters, operators typically need 5-8 minutes to complete a single insert change, resulting in significant time waste on high-efficiency production lines.

[0005] With the promotion of lean manufacturing concepts, reducing non-value-adding time and improving equipment utilization have become common goals for manufacturing enterprises. Therefore, developing a milling cutter that allows for quick insert changes with no or minimal tools has significant practical value and market potential. This not only significantly shortens insert changeover time and improves production efficiency but also reduces the labor intensity of operators and minimizes quality problems caused by improper bolt tightening. Utility Model Content

[0006] The purpose of this utility model is to provide a milling cutter with quick-change inserts, which can significantly shorten insert change time, improve production efficiency, reduce the labor intensity of operators, and reduce quality problems caused by improper bolt tightening.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A milling cutter with quick-change inserts includes a fixed rod, a tool holder at the bottom end of the fixed rod, and multiple fixing slots at the bottom end of the tool holder. A slider is detachably inserted into the inner cavity of each fixing slot, and an insert is fixedly connected to the bottom end of each slider. A fixing assembly is provided on the outer wall of the fixed rod, including a top plate, a spring, a lifting plate, and a plug rod. The top plate is fixedly sleeved on the outer wall of the fixed rod, the spring is sleeved on the outer wall of the fixed rod, the lifting plate is slidably sleeved on the outer wall of the fixed rod, and the upper and lower ends of the spring are fixedly connected to the top plate and the lifting plate, respectively. The plug rod is located at the bottom end of the lifting plate. A through hole is formed at the top end of the tool holder and extends into the inner cavity of the fixing slots. A fixing hole is formed at the top end of the slider, and the plug rod can be inserted into the through hole and the fixing hole to fix the slider.

[0009] Preferably, the inner cavity of the fixing groove is adapted to fit the outer wall of the slider and both are "T" shaped.

[0010] Preferably, the fixing component further includes a limiting component, which includes a sliding groove and a sliding strip. The sliding groove is formed on the inner wall of the lifting plate, and the sliding strip is fixedly connected to the outer wall of the fixing rod. The sliding groove is sleeved on the outer wall of the sliding strip to prevent the lifting plate from rotating around the fixing rod.

[0011] Preferably, the inner cavity of the groove and the outer wall of the slide bar are adapted to fit each other and are both dovetail-shaped.

[0012] Preferably, the outer wall of the insertion rod is adapted to fit the inner wall of the fixing hole and the through hole, and there is no obvious gap after insertion.

[0013] Preferably, handles are provided on both sides of the outer wall of the lifting plate to facilitate the operator to control the lifting plate to slide up and down.

[0014] Preferably, the blade is fixedly connected to the bottom end of the slider by welding or mechanical fixing.

[0015] Preferably, the blade and the slider are integrally formed.

[0016] Preferably, the blade is a stainless steel blade; stainless steel blades are corrosion-resistant, have high strength, and a long service life.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] 1) This utility model achieves rapid blade replacement through a specially designed "T"-shaped slider and insert locking mechanism. The entire replacement process requires no tools and is simple and intuitive to operate. Compared with the traditional bolt fixing method, the blade replacement time is shortened from 5-8 minutes to 30 seconds to 1 minute, effectively improving replacement efficiency, significantly reducing equipment downtime, and increasing production efficiency.

[0019] 2) The spring-assisted locking mechanism of this utility model ensures that the insertion rod is always locked, preventing the blade from loosening due to vibration during processing. At the same time, the limiting design of the dovetail groove and slide bar ensures that the lifting plate can only move along the axial direction of the fixed rod and will not rotate, thus improving the stability and reliability of operation.

[0020] 3) The T-shaped slider and the fixed groove of this utility model increase the contact area, improve the rigidity and stability of the blade fixation, ensure that the blade position accuracy remains unchanged under high-speed cutting conditions, and guarantee the machining quality.

[0021] 4) This utility model has a simple structure, is easy to maintain, and has no easily worn parts such as threads, which extends the service life of the tool and reduces maintenance costs.

[0022] 5) When installing the insert, pull the lifting plate upwards, causing it to slide the insert rod upwards in a straight line under the limiting action of the slide groove and slide bar. This disengages the insert rod from the inner cavity of the through hole, and the spring undergoes elastic deformation due to the compression of the lifting plate and the top plate, generating corresponding elastic force. Then, insert the slider into the inner cavity of the fixing groove. Once the slider is fully inserted, align the fixing hole with the through hole. Release the lifting plate, and under the elastic force of the spring, the lifting plate will cause the insert rod to slide downwards in a straight line under the limiting action of the slide groove and slide bar, allowing the insert rod to penetrate the inner cavity of the through hole and insert into the inner cavity of the fixing hole. The combined action of the insert rod and the fixing hole achieves rapid fixing of the insert, solving the problem of existing milling cutter inserts being bolted to the tool holder, which is complex, time-consuming, and requires significant time for installation. Attached Figure Description

[0023] Figure 1 This is one of the exploded structural diagrams of this utility model;

[0024] Figure 2 This is the second exploded view of the structure of this utility model;

[0025] Figure 3 This utility model Figure 2 Enlarged view of point A;

[0026] Figure 4 This is a schematic diagram of the slider of this utility model.

[0027] In the diagram: 1. Fixed rod; 2. Tool holder; 3. Top plate; 4. Lifting plate; 5. Slide groove; 6. Slide bar; 7. Spring; 8. Fixed groove; 9. Slider; 10. Blade; 11. Fixed hole; 12. Through hole; 13. Insert rod. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figures 1 to 4 This utility model provides a milling cutter with quick-change blades, including a fixing rod 1, a tool holder 2 at the bottom end of the fixing rod 1, a plurality of fixing grooves 8 at the bottom end of the tool holder 2, a slider 9 detachably inserted into the inner cavity of each fixing groove 8, a blade 10 fixedly connected to the bottom end of each slider 9, and a fixing component for fixing the slider 9 on the outer wall of the fixing rod 1.

[0030] In this embodiment, the inner cavity of the fixing groove 8 and the outer wall of the slider 9 are appropriately matched and both are "T"-shaped, such as... Figure 4 As shown. This design ensures that the upper extension of the slider 9 remains embedded within the cavity of the fixing groove 8, guaranteeing that the slider 9 remains stable in the horizontal direction after being inserted into the fixing groove 8, preventing the slider 9 from loosening or falling off due to lateral forces during milling. Simultaneously, the "T"-shaped structure increases the contact area between the slider 9 and the fixing groove 8, improving the stability and accuracy of the cutting tool 10 during operation. The bottom end of the slider 9 is provided with a cutting tool fixing surface, on which the cutting tool 10 is securely connected by welding, bonding, or mechanical fixing methods (screws or bolts, etc.); preferably, the cutting tool 10 and the slider 9 are integrally formed.

[0031] In this embodiment, the fixing assembly includes a top plate 3, a spring 7, a lifting plate 4, a limiting assembly, a through hole 12, a fixing hole 11, and a plug rod 13. The top plate 3 is fixedly sleeved on the outer wall of the fixing rod 1, the spring 7 is sleeved on the outer wall of the fixing rod 1, and the lifting plate 4 is slidably sleeved on the outer wall of the fixing rod 1. The upper and lower ends of the spring 7 are fixedly connected to the top plate 3 and the lifting plate 4, respectively. The limiting assembly is disposed in the inner cavity of the lifting plate 4 and is fixedly connected to the outer wall of the fixing rod 1. The through hole 12 is opened at the top of the tool holder 2 and extends into the inner cavity of the fixing groove 8. The fixing hole 11 is opened at the top of the slider 9, and the plug rod 13 is disposed at the bottom end of the lifting plate 4.

[0032] The fixing hole 11 at the top of the slider 9 is a through hole, and its axis is precisely aligned with the axis of the through hole 12 at the top of the tool holder 2 when the slider 9 is fully inserted into the fixing slot 8. The diameter of the insertion rod 13 is matched with the inner diameter of the fixing hole 11 and the through hole 12, and there is no obvious gap after insertion, ensuring that the slider 9 will not loosen or shift after being fixed. This precise hole alignment and dimensional matching is the key to ensuring that high-precision machining can still be maintained after the tool 10 is quickly changed.

[0033] In this embodiment, the limiting component includes a sliding groove 5 and a sliding strip 6. The sliding groove 5 is formed on the inner wall of the lifting plate 4, and the sliding strip 6 is fixedly connected to the outer wall of the fixing rod 1. The sliding groove 5 is sleeved on the outer wall of the sliding strip 6. Figure 1 As shown. The design of the slide bar 6 and the slide groove 5 not only prevents the lifting plate 4 from rotating around the fixed rod 1, but also ensures that the lifting plate 4 maintains precise axial movement during its up and down movement, allowing the insertion rod 13 to be precisely aligned with the through hole 12 and the fixing hole 11. The length of the slide bar 6 matches the movable range of the lifting plate 4, ensuring that the lifting plate 4 is accurately guided and controlled at any position. The combined action of the slide groove 5 and the slide bar 6 prevents the lifting plate 4 from rotating around the fixed rod 1, improving the stability of the fixing assembly during use.

[0034] In this embodiment, the inner cavity of the groove 5 and the outer wall of the slide bar 6 are fitted together and both are dovetail-shaped, ensuring that one side of the slide bar 6 remains embedded in the inner cavity of the groove 5, thus improving the stability of the limiting component during use. The dovetail design increases the contact area, improves the load-bearing capacity, and ensures smoothness and accuracy during sliding.

[0035] In this embodiment, handles are provided on both sides of the outer wall of the lifting plate 4 to facilitate the operator's control of the lifting plate 4 to slide up and down. The handles are designed with ergonomic principles in mind, ensuring that the operator can easily grip and operate the plate under various working conditions, and can smoothly complete the blade replacement operation even when wearing work gloves.

[0036] During milling, the cutting resistance of the workpiece material generates significant radial and axial forces, potentially causing minute displacement of the cutting tool. This invention employs a dual-fixing mechanism through the appropriate fit between a "T"-shaped slider and a fixing groove, along with a locking mechanism where a insert rod passes through both the through hole and the fixing hole. The "T"-shaped structure primarily bears the radial force and part of the axial force during cutting, while the insert rod mainly prevents axial movement and loosening of the slider. This dual-fixing mechanism ensures the stability and accuracy of the cutting tool under high-speed rotation and heavy-load cutting conditions.

[0037] The pressure of spring 7 is carefully designed to ensure that the insertion rod 13 always maintains sufficient preload during operation. Even if vibration occurs during milling, it ensures that the insertion rod 13 will not disengage from the fixing hole 11, thus guaranteeing the stable fixation of the slider 9. The stiffness of spring 7 is selected to provide sufficient locking force without making the operation of the lifting plate 4 too strenuous, achieving a good balance between safety and ease of operation.

[0038] In actual use, when it is necessary to replace blade 10, the specific operating steps are as follows:

[0039] 1) The operator holds the handles on both sides of the lifting plate 4 with both hands and pulls the lifting plate 4 upward;

[0040] 2) The lifting plate 4 drives the insertion rod 13 to slide upward along a straight line under the limiting action of the slide groove 5 and the slide bar 6, so that the insertion rod 13 completely disengages from the inner cavity of the through hole 12 and the fixing hole 11.

[0041] 3) At this time, the spring 7 is compressed by the lifting plate 4 and the top plate 3, resulting in elastic deformation and accumulating elastic force;

[0042] 4) Remove the slider 9 and its blade 10 that need to be replaced;

[0043] 5) Insert the new slider 9 with blade 10 into the inner cavity of the fixing groove 8, ensuring that the slider 9 is fully in place and that the fixing hole 11 and the through hole 12 are precisely aligned.

[0044] 6) Release the lifting plate 4. Under the elastic force of the spring 7, the lifting plate 4 drives the insertion rod 13 to slide downward in a straight line under the limiting action of the slide groove 5 and the slide bar 6.

[0045] 7) The insertion rod 13 automatically passes through the inner cavity of the through hole 12 and inserts into the inner cavity of the fixing hole 11, thus locking the slider 9.

[0046] The entire blade replacement process requires no tools and is simple and intuitive to operate. Compared to traditional bolt-fixing methods, it reduces blade replacement time from 5-8 minutes to 30 seconds to 1 minute, significantly improving efficiency. This substantial time saving is especially important in mass production environments, as it can greatly reduce equipment downtime and increase production efficiency.

[0047] To meet different processing requirements, this invention can be equipped with blades 10 of different materials and shapes. Blades 10 can be made of high-speed steel, cemented carbide, ceramics, cubic boron nitride, etc., to satisfy the needs of different workpiece materials and processing conditions. The connection method between the slider 9 and the blade 10 can be selected according to the specific application, choosing the most suitable fixing method to ensure reliability and stability under high-speed cutting conditions.

[0048] The design of this utility model also takes into account various factors in the actual production environment. For example, all components are made of corrosion-resistant materials, which can be used for a long time in an environment with coolant; the design of the insertion rod 13 and the fixing hole 11 takes into account the problem of chips entering, and through reasonable structural layout and sealing design, the interference of chips on the locking mechanism is minimized; the stroke design of the lifting plate 4 ensures that the insertion rod 13 can be completely disengaged from the fixing hole 11, which facilitates the easy removal and insertion of the slider 9.

[0049] Compared with traditional bolt-fixed milling cutters, this utility model has the following significant advantages:

[0050] 1) Easy to operate: Blade replacement can be completed without tools, greatly simplifying the operation process;

[0051] 2) Time savings: Blade replacement time is significantly reduced, greatly improving equipment utilization;

[0052] 3) Stable and reliable: The dual fixing mechanism ensures the stability of the cutting tool under high-speed cutting conditions;

[0053] 4) Precision assurance: A matching locking mechanism ensures the consistency of the blade position after each replacement;

[0054] 5) Easy maintenance: No threads or other easily worn parts, reducing maintenance costs and extending tool life;

[0055] 6) Wide applicability: The design is compatible with various blade materials and shapes to meet different processing needs.

[0056] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A milling cutter with quick-change inserts, comprising a retaining rod (1), characterized in that: The bottom end of the fixed rod (1) is provided with a knife holder (2), and the bottom end of the knife holder (2) is provided with multiple fixed grooves (8). Each fixed groove (8) has a slider (9) that can be detachably inserted into its inner cavity, and each slider (9) has a blade (10) fixedly connected to its bottom end. The outer wall of the fixed rod (1) is provided with a fixing component, which includes a top plate (3), a spring (7), a lifting plate (4) and a plug rod (13). The top plate (3) is fixedly sleeved on the outer wall of the fixed rod (1), the spring (7) is sleeved on the outer wall of the fixed rod (1), the lifting plate (4) is slidably sleeved on the outer wall of the fixed rod (1), the upper and lower ends of the spring (7) are fixedly connected to the top plate (3) and the lifting plate (4) respectively, and the plug rod (13) is set at the bottom end of the lifting plate (4). The top end of the knife holder (2) is provided with a through hole (12) and extends into the inner cavity of the fixing groove (8). The top end of the slider (9) is provided with a fixing hole (11). The plug rod (13) can be inserted into the through hole (12) and the fixing hole (11) to fix the slider (9).

2. The milling cutter with quick-change inserts according to claim 1, characterized in that: The inner cavity of the fixed groove (8) fits into the outer wall of the slider (9) and both are T-shaped.

3. A milling cutter with quick-change inserts according to claim 1, characterized in that: The fixing component also includes a limiting component, which includes a groove (5) and a slide bar (6). The groove (5) is opened on the inner wall of the lifting plate (4), and the slide bar (6) is fixedly connected to the outer wall of the fixing rod (1). The groove (5) is sleeved on the outer wall of the slide bar (6) to prevent the lifting plate (4) from rotating around the fixing rod (1).

4. A milling cutter with quick-change inserts according to claim 3, characterized in that: The inner cavity of the groove (5) fits well with the outer wall of the slide bar (6) and both are dovetail shaped.

5. A milling cutter with quick-change inserts according to claim 1, characterized in that: The outer wall of the insertion rod (13) is adapted to fit the inner wall of the fixing hole (11) and the through hole (12).

6. A milling cutter with quick-change inserts according to claim 1, characterized in that: Handles are provided on both sides of the outer wall of the lifting plate (4) to facilitate the operator to control the lifting plate (4) to slide up and down.

7. A milling cutter with quick-change inserts according to claim 1, characterized in that: The blade (10) is fixedly connected to the bottom end of the slider (9) by welding or mechanical fixing.

8. A milling cutter with quick-change inserts according to claim 1, characterized in that: The blade (10) and the slider (9) are integrally formed.

9. A milling cutter with quick-change inserts according to claim 1, characterized in that: The blade (10) is a stainless steel blade.

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