Hardware cutting machine

Abstract

The invention discloses a hardware cutting machine, and relates to the technical field of machine tool cutting, the hardware cutting machine comprises a workbench and a chuck, and is characterized in that the chuck is slidably connected with three clamping jaws, the chuck is provided with a supporting assembly, and the clamping jaws are provided with replacement assemblies; according to the device, the supporting assembly and the auxiliary assembly are matched with each other, the ball head block and the inner concave seat form a spherical pair structure, and the supporting plate and the circular non-slip mat freely swing around the center of the inner concave seat through the spherical pair structure, so that the inclined plane angle of the end of the shaft workpiece is automatically adapted, and complete attachment of the circular non-slip mat and the inclined plane of the workpiece is achieved; and the function of supporting the inclined surface of the end part of the workpiece is further realized, the problem that in the prior art, if the end surface of the workpiece is an inclined surface, a fixed-depth groove formed in an existing chuck cannot provide stable support is solved, and the adaptability of a cutting machine tool in the deep machining process of the cutting blade is improved.

Description

Technical Field

[0001] This invention relates to the field of machine tool cutting technology, and more specifically, to a hardware cutting machine. Background Technology

[0002] A cutting machine (also commonly called a cutting machine or cutting equipment) is a type of mechanical equipment that uses cutting tools (such as knives, grinding wheels, saw blades, etc.) to remove excess material from a workpiece through mechanical processing to obtain a predetermined shape, size, and surface quality. Among these, the drilling machine of a hardware cutting machine tool is used for drilling and reaming. It refers to a vertical machine tool used for drilling holes in hardware parts. This device consists of a movable tool post and a jaw chuck. Traditional cutting machines typically use a three-jaw chuck to fix shaft-type hardware parts. When fixing a shaft-type workpiece, the end of the workpiece is placed into the groove in the center of the chuck and makes contact with it. Then, the jaws on the chuck clamp the outer ring surface of the workpiece. However, if the length of the metal shaft workpiece is relatively short, the jaws on the three-jaw chuck will only hold the outer ring surface of the shorter shaft workpiece. At this time, the end face of the shorter shaft workpiece is not supported, which makes it easy to become unstable during the cutting process and thus cause it to overturn. Existing technologies may replace the workpiece with a reverse jaw, using the stepped end face on its back as a support surface. However, the step depth of the reverse jaw is fixed (and reverse jaws are generally used for shaft workpieces with large radii), resulting in poor versatility. If the workpiece diameter does not match the stepped hole of the reverse jaw, it either cannot be inserted or the gap is too large. At the same time, the reverse jaw is relatively large, and when machining shaft workpieces with short lengths, or when the tool needs to approach from a specific angle, the reverse jaw itself may collide with the tool. In addition, the contact surfaces between the jaws and the workpiece on a traditional chuck will wear down after prolonged use. Wear on the jaws will lead to a decrease in the centering accuracy of the workpiece, requiring replacement or regrinding. If not replaced in time, centering deviation will occur after the workpiece is clamped and fixed, resulting in deviation of the cutting position.

[0003] To solve the above problems, the inventor proposed a hardware cutting machine. Summary of the Invention

[0004] To solve the above-mentioned technical problems, a hardware cutting machine is provided, and this technical solution solves the problems mentioned in the background art. To achieve the above objectives, the present invention can be implemented using the following technical solutions: This invention provides a hardware cutting machine, including a worktable and a chuck. The worktable is provided with a moving module and a drill bit, and the chuck is slidably connected with three jaws. The chuck is provided with a support assembly, which includes an electric telescopic rod fixedly connected to the chuck. A base plate is slidably connected to the chuck, and an inner recess is fixedly connected to the base plate. A ball head block is rotatably connected to the inner recess, and the ball head block consists of a ball head and a cylindrical part. A support plate is fixedly connected to the ball head block. Multiple sleeves are fixedly connected in a ring at equal intervals inside the base plate. A sliding rod is slidably connected to each sleeve, and a top block is fixedly connected to each sliding rod. A compression spring is fixedly connected between each top block and a sleeve. The jaw is provided with a replacement component, which includes a rectangular hole and a support block. There are three rectangular holes and three support blocks. Each rectangular hole is opened at the end of the jaw adjacent to it. Each support block is rotatably connected to the interior of the adjacent rectangular hole. Each support block is set as a "regular hexagon".

[0005] Preferably, the moving module consists of an electric lead screw and a moving platform. The drill bit is rotatably connected to the moving platform, the telescopic end of the electric telescopic rod is fixedly connected to the base plate, and a circular anti-slip pad is provided on the support plate, with annular anti-slip patterns on the circular anti-slip pad.

[0006] Preferably, the concave seat and the ball head of the ball head block form a spherical pair fit.

[0007] Preferably, the end of each top block is configured as "rounded", the end of each top block abuts against the support plate, and each compression spring is in a compressed state.

[0008] Preferably, the chuck is provided with an auxiliary component, which includes magnetic holes and an auxiliary plate. There are three magnetic holes, which are equidistantly arranged in a ring on the surface of the chuck. A magnetic rod is inserted into each magnetic hole, and the three magnetic rods are fixedly connected to the auxiliary plate.

[0009] Preferably, each of the magnetic suction holes is provided with a magnet, each of the magnetic suction rods has an iron block at its bottom, and the bottom surface of the auxiliary plate is flush with the upper surface of the claw.

[0010] Preferably, the replacement component includes three indicator knobs, each of which is rotatably connected to an adjacent pawl. Each pawl has a square indicator mark and an indicator arrow. Each pawl has a moving groove and an elongated hole. Each moving groove is slidably connected to a moving block. Each moving block has a baffle fixedly connected to its surface. Each moving block has a threaded hole, and each threaded hole has a detachably threaded bolt. Each moving groove has two compression springs symmetrically fixedly connected to it, and each compression spring is in a compressed state.

[0011] Preferably, each of the indicator knobs is fixedly connected to a nearby support block, each of the indicator knobs is provided with an indicator plate, and each of the indicator plates points to a square indicator mark.

[0012] Preferably, each of the moving slots is connected to a nearby rectangular hole, each of the moving slots is connected to a nearby elongated hole, each of the moving blocks is fixedly connected to two nearby compression springs, each of the moving blocks has a rectangular anti-slip pad on its outer wall, and each of the rectangular anti-slip pads has strip-shaped anti-slip patterns on its surface.

[0013] As described above, the advantages of this invention are: The support and auxiliary components in this device work together, with the ball head block and the concave seat forming a spherical pair structure. This spherical pair structure allows the support plate and the circular anti-slip pad to swing freely around the center of the concave seat, thereby automatically adapting to the angle of the inclined surface at the end of the shaft-type workpiece. This achieves complete contact between the circular anti-slip pad and the inclined surface of the workpiece, further realizing the support function for workpieces with inclined ends. This solves the problem in the prior art that if the end face of the workpiece is inclined, the fixed-depth groove opened by the existing chuck cannot provide stable support, thus improving the adaptability of the cutting machine tool during the deep machining process of the cutting insert.

[0014] The support and auxiliary components in this device work together. The electric telescopic rod allows the support plate and the circular anti-slip pad to move, replacing the fixed-depth grooves of traditional chucks. This provides support for the end face of shorter shaft-like workpieces, solving the problem that the inner wall of the groove in traditional chucks is broken and cannot contact the end of shorter shaft-like workpieces, thus failing to provide support. This improves the stability of metal cutting during the deep machining process of the cutting insert.

[0015] The replacement component in this device uses a rotatable hexagonal support block within each jaw of the chuck. The vertical surface of the support block secures the shaft-like workpiece. By periodically rotating the support block, the unworn vertical surface is rotated to the working position, allowing all six working surfaces to be used alternately. This extends the service life of the jaws and solves the problem of traditional chucks requiring complete replacement or re-grinding of worn jaws. Furthermore, because the rotated working surface is a new, unworn vertical surface, it can center and stably clamp the shaft-like workpiece. This addresses the issue of centering deviation caused by wear on the contact surface between the jaws and the shaft-like workpiece during prolonged use, leading to deviations in the cutting position. This improves the consistency of batch machining of hardware parts during deep machining processes. Attached Figure Description

[0016] Figure 1 This is a front perspective view of the overall structure of the present invention; Figure 2 This is a three-dimensional cross-sectional view of the chuck shown in this invention; Figure 3 This is a three-dimensional schematic diagram of the electric telescopic pole and related components of the base plate shown in this invention; Figure 4 This is a three-dimensional schematic diagram of the concave seat and ball head block related components shown in this invention; Figure 5 This is a three-dimensional schematic diagram of the sleeve, slide bar and related components shown in the present invention; Figure 6 This is a three-dimensional schematic diagram of the magnetic suction hole and magnetic suction rod components shown in this invention; Figure 7 This is an exploded three-dimensional schematic diagram of the magnetic suction hole and auxiliary plate shown in this invention; Figure 8 This is a three-dimensional schematic diagram of the rectangular hole and support block components shown in this invention; Figure 9 This is a three-dimensional schematic diagram of the support block and indicator knob components shown in this invention; Figure 10 This is a three-dimensional schematic diagram of the moving block and baffle components shown in this invention; Figure 11 This is an exploded three-dimensional schematic diagram of the threaded hole and bolt shown in this invention.

[0017] The reference numerals in the accompanying drawings of this invention are as follows: 1. Worktable; 11. Moving module; 12. Drill bit; 2. Chuck; 3. Chuck jaws; Support components: 41. Electric telescopic rod; 42. Base plate; 43. Recessed seat; 44. Ball head block; 45. Support plate; 46. Sleeve; 47. Slide rod; 48. Top block; 49. Compression spring 1 Auxiliary components: 51. Magnetic suction hole; 52. Auxiliary plate; 53. Magnetic suction rod; Replacement components: 61. Rectangular hole; 62. Support block; 63. Indicator knob; 64. Moving slot; 65. Long hole; 66. Moving block; 67. Baffle; 68. Threaded hole; 69. Bolt; 610. Compression spring II. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0019] The embodiments provided by the present invention will be described in detail below: A type of hardware cutting machine, such as Figure 1 and Figure 2 As shown, it includes a worktable 1 and a chuck 2. The worktable 1 is equipped with a moving module 11 and a drill bit 12. Three jaws 3 are radially slidably connected on the chuck 2. The worktable 1, the moving module 11, the drill bit 12, the chuck 2, and the jaws 3 are all existing technologies, and will not be described in detail here. The movable module 11 consists of an electric lead screw and a movable table. The drill bit 12 is rotatably connected to the movable table. The drill bit 12 is driven by a motor to rotate and drill holes in the hardware.

[0020] like Figures 2 to 5 As shown, a support assembly is provided on the chuck 2. The support assembly includes an electric telescopic rod 41 fixedly connected inside the chuck 2. A base plate 42 is vertically slidably connected inside the chuck 2, and the base plate 42 is located directly above the electric telescopic rod 41. An inner recess 43 is fixedly connected to the side of the base plate 42 away from the electric telescopic rod 41. A ball head block 44 is rotatably connected inside the inner recess 43. The ball head block 44 consists of a ball head and a cylindrical part. The ball head block 44 is in a vertical state, and the axis of the ball head block 44 is on the same line as the axis of the inner recess 43. On the line, a support plate 45 is fixedly connected to the ball head block 44. Multiple sleeves 46 are fixedly connected in a ring at equal intervals inside the base plate 42. The end of each sleeve 46 extends out of the base plate 42. A sliding rod 47 is vertically slidably connected inside each sleeve 46. The end of each sliding rod 47 extends out of the adjacent sleeve 46. A top block 48 is fixedly connected to the end of each sliding rod 47 away from the base plate 42. A compression spring 49 is fixedly connected between each top block 48 and the sleeve 46. Each compression spring 49 is sleeved on the outside of the sliding rod 47. like Figure 8 and Figure 9 As shown, a replacement component is provided on the chuck 3. The replacement component includes a rectangular hole 61 and a support block 62. There are three rectangular holes 61 and three support blocks 62. Each rectangular hole 61 is opened on the outer wall of the adjacent chuck 3. The opening of each rectangular hole 61 faces the center of the chuck 2. Each support block 62 is rotatably connected to the interior of the adjacent rectangular hole 61. Each support block 62 is set as a "regular hexagon".

[0021] Furthermore, such as Figure 3 As shown, the telescopic end of the electric telescopic rod 41 is fixedly connected to the bottom surface of the base plate 42. The telescopic end of the electric telescopic rod 41 can be extended or retracted by the controller, thereby causing the base plate 42 to move vertically. A circular anti-slip pad is provided on the support plate 45, and the circular anti-slip pad is provided with annular anti-slip texture. When the circular anti-slip pad abuts and fits against the end of the workpiece, the circular anti-slip pad and the annular anti-slip texture are used to ensure that the shaft workpiece will not slip.

[0022] Furthermore, such as Figure 4As shown, the concave seat 43 and the ball head of the ball head block 44 form a spherical pair, so that the ball head block 44 can swing around the center of the concave seat 43.

[0023] Furthermore, such as Figure 3 and Figure 5 As shown, the end of each top block 48 away from the bottom plate 42 is set as "round head". The "round head" end of each top block 48 abuts against the bottom surface of the support plate 45. Each compression spring 49 is in a compressed state. The elastic force stored in the multiple compression springs 49 in the compressed state acts on the support plate 45 through the adjacent top blocks 48, so that the support plate 45 is in a horizontal state.

[0024] Furthermore, such as Figure 6 and Figure 7 As shown, the chuck 2 is provided with an auxiliary component, which includes a magnetic suction hole 51 and an auxiliary plate 52. There are three magnetic suction holes 51, which are equidistantly arranged in a ring on the upper surface of the chuck 2. The auxiliary plate 52 is located directly above the chuck 2. A magnetic suction rod 53 is inserted into each magnetic suction hole 51, and the three magnetic suction rods 53 are fixedly connected to the auxiliary plate 52.

[0025] Furthermore, such as Figure 6 and Figure 7 As shown, each magnetic suction hole 51 has a magnet on its inner bottom surface, and each magnetic suction rod 53 has an iron block on its bottom surface. When the magnetic suction rod 53 is inserted into the inner bottom surface of the magnetic suction hole 51, the auxiliary plate 52 is temporarily fixed and stationary due to the attraction between the magnet and the iron block. The bottom surface of the auxiliary plate 52 is flush with the upper surface of the jaw 3. When machining a short shaft tool, the end face of the shaft workpiece is pressed tightly against the bottom surface of the auxiliary plate 52, and then the three magnetic suction rods 53 are inserted into the adjacent magnetic suction holes 51 to fix the auxiliary plate 52. Then, the controller causes the support blocks 62 in the three jaws 3 to clamp and fix the shaft workpiece. In this way, the distance between each shaft workpiece and the tool is kept consistent after it is fixed, avoiding the need to readjust the tool before each machining.

[0026] Furthermore, such as Figures 8 to 11As shown, the replacement component includes three indicator knobs 63. Each indicator knob 63 is rotatably connected to an adjacent jaw 3. Each indicator knob 63 is located on the upper surface of the adjacent jaw 3. A square indicator mark and an indicator arrow are provided on the side of the jaw 3 near the indicator knob 63. The indicator arrow is used to indicate the direction of rotation of the indicator knob 63. Each jaw 3 has a moving groove 64, and each jaw 3 has an elongated hole 65 on its upper surface. Each elongated hole 65 is located above the adjacent moving groove 64. Each moving groove 64... A sliding block 66 is slidably connected. A baffle 67 is fixedly connected to the upper surface of each sliding block 66. Part of each baffle 67 is located in a nearby elongated hole 65, and its end protrudes from the nearby elongated hole 65. Each baffle 67 abuts against the end wall of the nearby elongated hole 65. A threaded hole 68 is opened on the side of each sliding block 66 near the baffle 67. A bolt 69 is detachably threadedly connected in each threaded hole 68. Two compression springs 610 are symmetrically fixedly connected in each sliding groove 64. Each compression spring 610 is in a compressed state.

[0027] Furthermore, such as Figure 9 and Figure 10 As shown, each indicator knob 63 is fixedly connected to the adjacent support block 62. Each indicator knob 63 is equipped with an indicator plate, and each indicator plate points to a square indicator mark. The square indicator mark is used to help staff check the rotation position of the indicator plate.

[0028] Furthermore, such as Figure 10 As shown, each movable slot 64 is connected to a nearby rectangular hole 61, and each movable slot 64 is connected to a nearby elongated hole 65. Each movable block 66 is fixedly connected to two nearby compression springs 610. Each movable block 66 has a rectangular anti-slip pad on its outer wall, and each rectangular anti-slip pad has a striped anti-slip texture on its surface. Since each compression spring 610 is in a compressed state, each rectangular anti-slip pad is in contact with the vertical surface of the nearby support block 62. When the rectangular anti-slip pad is in contact with the vertical surface of the support block 62, the circular anti-slip pad and the striped anti-slip texture are used to ensure that the support block 62 will not shift or rotate.

[0029] During work: This device can support short shaft-type workpieces, ensuring stability during the cutting process. The detailed steps are as follows: When it is necessary to support a short shaft-like workpiece, first remove the auxiliary plate 52 and the magnetic suction rod 53, so that the auxiliary plate 52 and the magnetic suction rod 53 are removed from the magnetic suction hole 51. Place the end face of the shaft-like workpiece to be cut against the bottom surface of the auxiliary plate 52. Then put the auxiliary plate 52 and the magnetic suction rod 53 back into the magnetic suction hole 51. At this time, keep the end face of the shaft-like workpiece still against the bottom surface of the auxiliary plate 52. Then, the controller causes the three jaws 3 to move radially towards the side closer to the shaft-like workpiece. The radial movement of the jaws 3 is existing technology and will not be described in detail here, until the support block 62 inside the jaws 3 clamps and fixes the shaft-like workpiece.

[0030] If the end of the shaft-type workpiece furthest from the auxiliary plate 52 is a horizontal plane: Once the shaft-like workpiece is fixed, the controller extends the telescopic end of the electric telescopic rod 41, pushing the base plate 42 vertically upward. The base plate 42 then moves the support plate 45 and the circular anti-slip pad together until the side of the circular anti-slip pad with the annular anti-slip texture contacts and abuts against the end face of the workpiece. Since both the circular anti-slip pad and the end of the shaft-like workpiece away from the auxiliary plate 52 are horizontal and parallel, the ball head block 44 will not rotate. Therefore, the support plate 45 and the circular anti-slip pad remain perpendicular to the spindle axis. In this way, the circular anti-slip pad abuts against the end face of the shaft-like workpiece, providing stable support and preventing relative movement between the shaft-like workpiece and the support block 62 during the cutting process.

[0031] If the end of the shaft-type workpiece furthest from the auxiliary plate 52 is an inclined surface: After the shaft-like workpiece is fixed, the controller causes the telescopic end of the electric telescopic rod 41 to extend, pushing the base plate 42 to move vertically upward. The base plate 42 drives the support plate 45 and the circular anti-slip pad to move together. The circular anti-slip pad first contacts the side of the inclined surface of the shaft-like workpiece end in a certain local area on its surface. At this time, the multiple top blocks 48 located below the contact area on the circular anti-slip pad are subjected to the reverse pressure transmitted from the support plate 45. This pressure causes the top blocks 48 and the slide rod 47 to retract into the sleeve 46, and the compression spring 49 is further compressed by the pressure of the top blocks 48.

[0032] At the same time, as the telescopic end of the electric telescopic rod 41 continues to extend, it drives the base plate 42 to move vertically upward, causing the ball head of the ball head block 44 to deflect around the center of the concave seat 43. During this process, the area where the circular anti-slip pad does not contact the inclined surface of the end of the shaft workpiece, the multiple top blocks 48 and slide rods 47 below it extend outward from the sleeve 46, and the round head of the top block 48 still abuts against the bottom surface of the support plate 45, thereby causing the compression spring 49 to extend, but still in a compressed state.

[0033] The deflection motion of the ball head block 44 around the center of the concave seat 43 causes the surface of the circular anti-slip pad with the annular anti-slip texture to gradually come into complete contact with the inclined surface at the end of the shaft workpiece. When the circular anti-slip pad finally comes into complete contact with the inclined surface of the workpiece, all the compression springs 49 are in a compressed state, but the amount of compression is different for each of them.

[0034] After the surface of the circular anti-slip pad is in contact with the end face of the shaft workpiece, the operator stops the extension of the electric telescopic rod 41, removes the auxiliary plate 52 and the magnetic suction rod 53, and then the electric lead screw in the moving module 11 of the cutting machine tool rotates in conjunction with the moving table to drive the drill bit 12 to move. The drill bit 12 is driven by the motor to rotate and drill holes in the hardware. After the cutting and drilling work is completed, the operator grabs the shaft workpiece that has been cut and uses the controller to make the chuck 3 move radially away from the shaft workpiece, and the extension of the electric telescopic rod 41 retracts.

[0035] The retraction of the telescopic end of the electric telescopic rod 41 causes the base plate 42 to move vertically downward, and the circular anti-slip pad gradually moves away from the end slope of the shaft workpiece. During this process, all compression springs 49 rebound and reset, causing the ball head block 44 and the support plate 45 to deflect around the center of the concave seat 43 and deflect back to the initial position. When the support plate 45 is in the initial position, that is, in a horizontal state, all compression springs 49 also rebound to the initial compression amount and maintain the initial compression state.

[0036] In the above process, the support component and auxiliary component in this device cooperate with each other. The support plate 45 and the circular anti-slip pad can be moved by the electric telescopic rod 41, which replaces the fixed-depth groove of the traditional chuck 2. This provides support for the end face of the shorter shaft workpiece, solving the problem that the inner wall of the groove in the traditional chuck 2 is broken and cannot contact the end of the shorter shaft workpiece, thus failing to provide support for the shorter shaft workpiece. This improves the stability of the cutting of hardware parts during the deep machining process of the cutting blade.

[0037] In the above process, the support components and auxiliary components in this device cooperate with each other. The ball head block 44 and the concave seat 43 form a spherical pair structure. Through the spherical pair structure, the support plate 45 and the circular anti-slip pad can swing freely around the center of the concave seat 43, thereby automatically adapting to the inclined angle of the end of the shaft workpiece, realizing the complete fit between the circular anti-slip pad and the inclined surface of the workpiece, and further realizing the support function for the inclined end of the workpiece. This solves the problem in the prior art that if the end face of the workpiece is inclined, the groove of the fixed depth opened by the existing chuck 2 cannot provide stable support, and improves the adaptability of the cutting machine tool during the deep machining process of the cutting tool.

[0038] This device can extend the service life of the jaws 3 on the chuck 2. The detailed steps are as follows: After a period of use, the surface of the support block 62 extending from the vertical surface of the rectangular hole 61 will wear out and need to be replaced. The operator first removes the bolt 69 so that the bolt 69 leaves the threaded hole 68, and then pushes the baffle 67 so that the baffle 67 drives the moving block 66 and the rectangular anti-slip pad to move along the inner cavity of the moving groove 64 towards the side closer to the compression spring 610. When the baffle 67 abuts against the other end wall of the elongated hole 65, the baffle 67 stops moving. At this time, the rectangular anti-slip pad on the moving block 66 has left the support block 62, and during this process, the compression spring 610 is squeezed by the moving block 66 and is in a compressed state. After the rectangular anti-slip pad leaves the support block 62, the worker rotates the indicator knob 63 counterclockwise by 60 degrees according to the direction of the indicator arrow. The indicator knob 63 drives the support block 62 to rotate 60 degrees together, so that the worn vertical surface of the support block 62 returns to the inside of the rectangular hole 61. At the same time, a brand new vertical surface of the support block 62 rotates to the working position, that is, it extends out of the rectangular hole 61, replacing the worn vertical surface. After the new vertical surface replaces the worn vertical surface, release the baffle 67. At this time, the second compression spring 610 rebounds and resets, pushing the moving block 66. This causes the moving block 66 and the rectangular buffer pad to move along the inner cavity of the moving groove 64 towards the side closer to the support block 62, until the baffle 67 returns to its initial position. At this time, the rectangular anti-slip pad on the moving block 66 re-abuts against the support block 62. Then, the bolt 69 is inserted into the threaded hole 68 and tightened to fix the moving block 66, making the moving block 66 stationary. Through the abutment of the rectangular anti-slip pad and the fixation of the moving block 66, the support block 62 is limited to prevent it from rotating, thus further fixing the support block 62. In this way, the vertical surface of the support block 62 in one of the claws 3 is replaced. Repeat the above steps to rotate the support blocks 62 in the remaining two claws 3 counterclockwise by 60 degrees to complete the replacement of the vertical surfaces of all the support blocks 62. Since the support block 62 is set as a "regular hexagon", the operator can periodically rotate the support block 62 counterclockwise by 60 degrees according to the direction of the indicator arrow. It can be rotated five times, so that the six vertical surfaces of the support block 62, i.e. the working surfaces, are used in turn, thereby ensuring the stability of clamping shaft-type workpieces and the accuracy of centering.

[0039] In the above process, the replacement component in this device, by setting a rotatable hexagonal support block 62 in each jaw 3 of the chuck 2, fixes the shaft workpiece with the vertical surface of the support block 62. By periodically rotating the support block 62, the unworn vertical surface on the support block 62 is rotated to the working position, so that its six working surfaces are used in rotation, thereby extending the service life of the jaw 3. This solves the problem that the jaw 3 on the traditional chuck 2 needs to be replaced or re-grinded after wear. Moreover, since the working surface after rotation is a new unworn vertical surface, it can center and stably clamp the shaft workpiece. This solves the problem that when the jaw 3 is used to fix the shaft workpiece in the traditional way, the contact surface between the jaw 3 and the shaft workpiece will wear and cause centering deviation due to long-term use, which will lead to deviation in the cutting position. This improves the consistency of batch cutting of hardware parts during the deep machining process of the cutting tool.

[0040] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hardware cutting machine, comprising a worktable (1) and a chuck (2), characterized in that, The workbench (1) is equipped with a moving module (11) and a drill bit (12), and three jaws (3) are slidably connected to the chuck (2). The chuck (2) is provided with a support assembly, which includes an electric telescopic rod (41) fixedly connected to the chuck (2). A base plate (42) is slidably connected to the chuck (2). An inner recess (43) is fixedly connected to the base plate (42). A ball head block (44) is rotatably connected to the inner recess (43). The ball head block (44) is composed of a ball head and a cylindrical part. A support plate (45) is fixedly connected to the ball head block (44). Multiple sleeves (46) are fixedly connected in a ring at equal intervals inside the base plate (42). A sliding rod (47) is slidably connected inside each sleeve (46). A top block (48) is fixedly connected to each sliding rod (47). A compression spring (49) is fixedly connected between each top block (48) and the sleeve (46). The claw (3) is provided with a replacement component, which includes a rectangular hole (61) and a support block (62). There are three rectangular holes (61) and three support blocks (62). Each rectangular hole (61) is opened at the end of the claw (3) and each support block (62) is rotatably connected to the inside of the rectangular hole (61). Each support block (62) is set as a "regular hexagon".

2. The hardware cutting machine according to claim 1, characterized in that, The mobile module (11) consists of an electric lead screw and a moving platform. The drill bit (12) is rotatably connected to the moving platform. The telescopic end of the electric telescopic rod (41) is fixedly connected to the base plate (42). A circular anti-slip pad is provided on the support plate (45), and the circular anti-slip pad is provided with annular anti-slip patterns.

3. A hardware cutting machine according to claim 1, characterized in that, The concave seat (43) and the ball head of the ball head block (44) form a spherical pair.

4. A hardware cutting machine according to claim 1, characterized in that, Each of the top blocks (48) is configured with a "rounded head" at the end, and each of the top blocks (48) abuts against the support plate (45), and each of the compression springs (49) is in a compressed state.

5. A hardware cutting machine according to claim 1, characterized in that, The chuck (2) is provided with an auxiliary component, which includes a magnetic suction hole (51) and an auxiliary plate (52). There are three magnetic suction holes (51), which are equidistantly arranged in a ring on the surface of the chuck (2). A magnetic suction rod (53) is inserted into each magnetic suction hole (51), and the three magnetic suction rods (53) are fixedly connected to the auxiliary plate (52).

6. A hardware cutting machine according to claim 5, characterized in that, Each of the magnetic suction holes (51) is provided with a magnet, and each of the magnetic suction rods (53) is provided with an iron block at the bottom. The bottom surface of the auxiliary plate (52) is flush with the upper surface of the claw (3).

7. A hardware cutting machine according to claim 1, characterized in that, The replacement component includes an indicator knob (63), three of which are provided. Each indicator knob (63) is rotatably connected to a nearby pawl (3). The pawl (3) is provided with a square indicator mark and an indicator arrow. Each pawl (3) has a moving groove (64) and an elongated hole (65). Each moving groove (64) is slidably connected to a moving block (66). Each moving block (66) has a baffle (67) fixedly connected to its surface. Each moving block (66) has a threaded hole (68) on its surface. Each threaded hole (68) has a detachable threaded bolt (69). Each moving groove (64) has two compression springs (610) symmetrically fixedly connected to it. Each compression spring (610) is in a compressed state.

8. A hardware cutting machine according to claim 7, characterized in that, Each of the indicated knobs (63) is fixedly connected to the adjacent support block (62), and each of the indicated knobs (63) is provided with an indicator plate, each of the indicator plates pointing to a square indicator mark.

9. A hardware cutting machine according to claim 7, characterized in that, Each of the moving slots (64) is connected to a nearby rectangular hole (61), each of the moving slots (64) is connected to a nearby elongated hole (65), each of the moving blocks (66) is fixedly connected to two nearby compression springs (610), each of the moving blocks (66) has a rectangular anti-slip pad on its outer wall, and each of the rectangular anti-slip pads has a strip-shaped anti-slip texture on its surface.

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