A three-axis tool setting device

Abstract

The utility model discloses a three axial tool setting device, including with the first axle direction on tool handle connection's fixed bolster, with fixed bolster swing joint's movable support and install on movable support and can along machine tool's second axle or third axle remove's measuring assembly, the measuring assembly includes the rack that passes through movable support and with its sliding connection, installs the measuring head at the both ends of rack, sets up in movable support inside and is used for the auxiliary rack along linear motion and reset's auxiliary spare and with rack cooperation is used for showing its removal distance's display spare. The utility model can realize XYZ three axial tool setting when milling and process, obtains the X value, Y value and Z value of the coordinate origin of workpiece coordinate system in machine tool coordinate system, and in the tool setting process, will not damage workpiece surface, the utility model realizes tool setting through mechanical structure, compares through pressure measuring head, sensor and realizes tool setting, the utility model simple structure, low in cost, and tool setting operation is simple.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical manufacturing, and in particular relates to a three-axis tool setting device. Background Technology

[0002] Determining the workpiece coordinate system position is a crucial step in machining, especially in milling. Currently, the commonly used methods for determining the workpiece coordinate system on both CNC milling machines and machining centers are trial cutting, photoelectric edge finding, and pressure probe tool setting. However, each method has its limitations. Trial cutting can easily damage the workpiece surface, resulting in surface quality that fails to meet accuracy requirements. Photoelectric edge finding can only achieve tool setting in the X and Y axes, not the Z axis. Pressure probes can achieve tool setting in the X, Y, and Z axes, but due to their high cost and susceptibility to damage, they are only used in high-end machine tool applications. Utility Model Content

[0003] Purpose of the utility model: The purpose of this utility model is to provide a three-axis tool setting device that can achieve XYZ three-axis tool setting, is low in cost, and does not damage the workpiece.

[0004] Technical Solution: This utility model discloses a three-axis tool setting device, including a fixed bracket connected to a tool holder in the first axis direction of a machine tool, a movable bracket rotatably connected to the fixed bracket, and a measuring component mounted on the movable bracket and capable of moving along the second or third axis of the machine tool. The first, second, and third axes of the machine tool constitute a three-dimensional coordinate system XYZ. The measuring component includes a rack that passes through and is slidably connected to the movable bracket, probes mounted at both ends of the rack, an auxiliary component disposed inside the movable bracket to assist the rack in linear movement and resetting, and a display component that cooperates with the rack to display its movement distance. In the initial state, the rack is perpendicular to the central axis of the tool holder. After the movable bracket rotates 180° relative to the fixed bracket, the rack is parallel to the central axis of the tool holder.

[0005] Furthermore, a cylindrical pin is provided between the rack and the probe, and both the rack and the probe are provided with pin holes that are interference fit with the cylindrical pin.

[0006] Furthermore, the auxiliary component includes a guide shaft arranged parallel to the bottom of the rack and fixedly connected to the interior of the movable bracket, two return springs symmetrically mounted on the outer periphery of the guide shaft, and a guide plate slidably sleeved on the outer periphery of the guide shaft and located between the two return springs, wherein the top of the guide plate is interference-fitted with a groove opened at the bottom of the rack.

[0007] Furthermore, the display includes a drive shaft disposed directly above the rack and rotatably connected to the movable bracket, a gear fixedly mounted on the outer periphery of the drive shaft and meshing with the rack, a pointer fixedly connected to the end of the drive shaft, and a dial disposed on the side of the movable bracket and matching the pointer.

[0008] Furthermore, the movable bracket is equipped with bearings, and the drive shaft is rotatably connected to the movable bracket through the bearings.

[0009] Furthermore, both ends of the drive shaft extend to the sides of the movable bracket, and there is a gap between the pointer and the movable bracket.

[0010] Furthermore, the fixed bracket is configured as an isosceles right-angled triangular prism structure, the movable bracket is configured as a right-angled trapezoidal column structure, and the fixed bracket and the movable bracket are spliced ​​together to form a cuboid structure.

[0011] Furthermore, a rotating shaft is provided between the fixed bracket and the movable bracket, and connection holes are provided on the sides of the fixed bracket and the movable bracket that are in contact with each other. The fixed bracket and the movable bracket are connected to the rotating shaft through the connection holes.

[0012] Furthermore, a connecting post for connecting to the tool holder of the machine tool is fixedly installed on the fixed bracket.

[0013] Beneficial effects: Compared with the prior art, the present invention has the following advantages: The present invention can achieve XYZ three-axis tool setting during milling, and obtain the X, Y and Z values ​​of the workpiece coordinate system origin in the machine tool coordinate system; and the workpiece surface will not be damaged during the tool setting process.

[0014] This invention achieves tool setting through a mechanical structure, effectively avoiding the problem of damage caused by excessive movement in existing photoelectric tool setting devices. Compared to tool setting via pressure probes and sensors, this invention has a simpler structure, lower cost, and more reliable measurement results. Furthermore, compared to tool setting via pressure probes and sensors, this invention is simpler to operate, requiring no training from the operator on how to use pressure probes and sensors. It also reduces the risk of damaging precision components, offering greater tolerance for operator error and facilitating practical use. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention when the connecting column and the rack are arranged perpendicularly.

[0016] Figure 2 For the present utility model Figure 1 The main view;

[0017] Figure 3 For the present utility model Figure 1The left view;

[0018] Figure 4 For the present utility model Figure 2 Sectional view at point AA;

[0019] Figure 5 For the present utility model Figure 3 Sectional view at point BB;

[0020] Figure 6 This is a schematic diagram of the structure of the present invention when the connecting column and the rack are arranged parallel to each other. Detailed Implementation

[0021] The technical solution of this utility model will be further described below with reference to the accompanying drawings.

[0022] This utility model discloses a three-axis tool setting device, such as Figures 1 to 6 As shown, the system includes a fixed support 1, a rotating shaft 2, a movable support 3, and a measuring component. The movable support 3 is rotatably connected to the fixed support 1. The fixed support 1 is an isosceles right-angled triangular prism, and the movable support 3 is a right-angled trapezoidal prism. The fixed support 1 and the movable support 3 are joined to form a cuboid structure. The rotating shaft 2 is located between the fixed support 1 and the movable support 3. Both the fixed support 1 and the movable support 3 have connecting holes on their contact surfaces. The fixed support 1 and the movable support 3 are connected to the rotating shaft 2 via these connecting holes, allowing the movable support 3 to rotate relative to the fixed support 1. However, the movable support 3 cannot rotate freely and requires external force to rotate. After the external force is removed, the movable support 3 remains stationary relative to the fixed support 1. In use, the fixed support 1 is connected to the tool holder along the first axis of the machine tool, and the measuring component is mounted on the movable support 3. The measuring component can move along the second or third axis of the machine tool. The first, second, and third axes of the machine tool constitute a three-dimensional coordinate system XYZ. Preferably, a connecting column 16 is fixedly connected to the fixed bracket 1, and the fixed bracket 1 can be installed on the tool holder in the first axis direction of the machine tool through the connecting column 16 during use.

[0023] like Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, the measuring assembly includes a rack 9, a probe 10, a cylindrical pin 15, auxiliary components, and a display component. The rack 9 vertically penetrates the movable bracket 3 and is slidably connected to it, with both ends extending to the sides of the movable bracket 3. The cylindrical pin 15 is located between the rack 9 and the probe 10, and both the rack 9 and the probe 10 have pin holes. The rack 9 and the probe 10 are both interference-fitted with the cylindrical pin 15 through the pin holes, and the two probes 10 are symmetrically distributed about the movable bracket 3. The auxiliary components are located inside the movable bracket 3 and are used to assist the rack 9 in linear movement and resetting. The display component is installed inside the movable bracket 3 and cooperates with the rack 9 to display the movement distance of the rack 9.

[0024] like Figure 1 and Figure 6 As shown, in the initial state, the rack 9 is perpendicular to the central axis of the tool holder. After the movable bracket 3 rotates 180° relative to the fixed bracket 1, the rack 9 is parallel to the central axis of the tool holder. In use, the connecting column 16 is connected to the tool holder in the first axis direction of the machine tool. At this time, the connecting column 16 is perpendicular to the rack 9, and the measuring component can move along the second axis (or third axis) of the machine tool to achieve tool setting on the second axis (or third axis). Adjusting the machine tool controls the tool holder to rotate 90°, so that the measuring component can move along the third axis (or second axis) of the machine tool, thereby achieving tool setting on the third axis (or second axis). External force rotates the movable bracket 3, so that the movable bracket 3 rotates 180° relative to the fixed bracket 1, and the connecting column 16 is parallel to the rack 9. At this time, the measuring component can move along the first axis of the machine tool to achieve tool setting on the first axis.

[0025] like Figure 4 and Figure 5 As shown, the auxiliary components include a guide shaft 12, a return spring 13, and a guide plate 11. The guide shaft 12 is parallel to the bottom of the rack 9 and is fixedly connected to the interior of the movable bracket 3. Two return springs 13 are arranged symmetrically around the outer periphery of the guide shaft 12. One end of each return spring 13 is fixedly connected to the inner wall of the movable bracket 3, and the other end is fixedly connected to the guide plate 11. The guide plate 11 is slidably sleeved on the outer periphery of the guide shaft 12 and is located between the two return springs 13. A groove is provided at the bottom of the rack 9, and the top of the guide plate 11 is interference-fitted with the groove. When the rack 9 is subjected to external force, the coordinated action of the guide plate 11 and the guide shaft 12 causes the rack 9 to move in a straight line, preventing the rack 9 from deviating from the straight line. After the external force acting on the rack 9 is removed, the two return springs 13 cause the rack 9 to return to its initial state.

[0026] like Figure 1 , Figure 2 , Figure 4 and Figure 6As shown, the display includes a drive shaft 6, a gear 5, and a pointer 4. The drive shaft 6 is positioned directly above the rack 9. A bearing 8 is mounted on the movable bracket 3, and the drive shaft 6 is rotatably connected to the movable bracket 3 via the bearing 8. The gear 5 is fixedly mounted on the outer circumference of the drive shaft 6 and meshes with the rack 9. Preferably, the gear 5 is fixedly connected to the drive shaft 6 via a screw locking screw 14. Both ends of the drive shaft 6 extend to the sides of the movable bracket 3, and the pointer 4 is fixedly connected to the ends of the drive shaft 6. Preferably, the pointer 4 is fixedly connected to the gear shaft 6 via a screw 7. There is a gap between the pointer 4 and the movable bracket 3, and a scale matching the pointer 4 is provided on the side of the movable bracket 3. In this embodiment, the linear motion of rack 9 is converted into the rotational motion of gear 5 via a rack and pinion transmission, ultimately resulting in the rotation of pointer 4. When no external force is applied to rack 9, pointer 4 points to the center of the dial. When an external force drives rack 9 to move, rack 9 drives gear 5 to rotate, transmission shaft 6 rotates synchronously with gear 5, and pointer 4 rotates synchronously with transmission shaft 6, causing pointer 4 to point to different graduations on the dial, which display the distance traveled by rack 9. When measuring the second (or third) axis, the origin coordinates of the second (or third) axis are calculated by moving the second (or third) axis and measuring it once in both the positive and negative directions. When measuring the first axis, the device needs to be adjusted to... Figure 6 The state can be determined by moving the first axis and measuring it once in the positive direction. The coordinates of the origin of the first axis can then be calculated.

[0027] Taking the first axis as the Z-axis, the second axis as the X-axis, and the third axis as the Y-axis as an example, the usage process of this device is as follows:

[0028] First, achieve X-axis tool setting by mounting the connecting column 16 on the machine tool's tool holder, making the rack 9 parallel to the machine tool's X-axis. At this point, the rack 9 is perpendicular to the central axis of the tool holder. Figure 1 As shown; after adjusting the installation position and angle of this device, move the coordinate axis of the machine tool so that the device is moved to the positive X-axis direction of the machine tool, so that the probe 10 slowly contacts the workpiece surface in the positive X-axis direction. During the movement of the rack 9, drive the gear 5 to rotate, and the transmission shaft 6 rotates synchronously with the gear 5. The pointer 4 rotates synchronously with the transmission shaft 6. Record the scale value X1 pointed to by the pointer 4 when the probe 10 contacts the workpiece surface in the positive X-axis direction; then move this device to the negative X-axis direction so that the probe 10 slowly contacts the workpiece surface in the negative X-axis direction. Record the scale value X2 pointed to by the pointer 4 when the probe 10 contacts the workpiece surface in the negative X-axis direction; the average value of X1 and X2 is the workpiece coordinate origin on the X-axis of the workpiece.

[0029] Next, to achieve Y-axis tool setting, control the machine tool's tool holder to rotate 90°, or remove this device from the machine tool, rotate it 90°, and then reinstall it onto the machine tool's tool holder, so that rack 9 is parallel to the machine tool's Y-axis. At this time, rack 9 is perpendicular to the central axis of the tool holder. Figure 1 As shown; after adjusting the installation position and angle of this device, move the coordinate axis of the machine tool so that the device is moved to the positive Y-axis direction of the machine tool, so that the probe 10 slowly contacts the workpiece surface in the positive Y-axis direction. During the movement of the rack 9, drive the gear 5 to rotate, and the transmission shaft 6 rotates synchronously with the gear 5. The pointer 4 rotates synchronously with the transmission shaft 6. Record the scale value Y1 pointed to by the pointer 4 when the probe 10 contacts the workpiece surface in the positive Y-axis direction; then move this device to the negative Y-axis direction so that the probe 10 slowly contacts the workpiece surface in the negative Y-axis direction. Record the scale value Y2 pointed to by the pointer 4 when the probe 10 contacts the workpiece surface in the negative Y-axis direction; the average value of Y1 and Y2 is the workpiece coordinate origin on the Y-axis of the workpiece.

[0030] Finally, Z-axis tool setting is achieved. External force rotates the movable support 3, causing it to rotate 180° relative to the fixed support 1. The connecting column 16 is then parallel to the rack 9, making the rack 9 parallel to the machine tool's Z-axis. At this point, the rack 9 is parallel to the central axis of the tool holder. Figure 6 As shown; after adjusting the installation position and angle of this device, move the coordinate axis of the machine tool so that the device moves to the positive Z-axis direction of the machine tool, so that the probe 10 slowly contacts the upper surface of the workpiece. During the movement of the rack 9, drive the gear 5 to rotate, the transmission shaft 6 rotates synchronously with the gear 5, and the pointer 4 rotates synchronously with the transmission shaft 6. Record the scale value Z1 pointed to by the pointer 4 when the probe 10 contacts the upper surface of the workpiece in the positive Z-axis direction; Z1 is the workpiece coordinate origin of the Z-axis of the workpiece.

Claims

1. A three-axis tool setting device, characterized in that: The system includes a fixed bracket (1) connected to the tool holder in the first axis direction of the machine tool, a movable bracket (3) rotatably connected to the fixed bracket (1), and a measuring component mounted on the movable bracket (3) and capable of moving along the second or third axis of the machine tool. The first, second, and third axes of the machine tool constitute a three-dimensional coordinate system XYZ. The measuring component includes a rack (9) that passes through and is slidably connected to the movable bracket (3), probes (10) mounted at both ends of the rack (9), an auxiliary component located inside the movable bracket (3) to assist the rack (9) in linear movement and resetting, and a display component that cooperates with the rack (9) to display its movement distance. In the initial state, the rack (9) is perpendicular to the central axis of the tool holder. After the movable bracket (3) rotates 180° relative to the fixed bracket (1), the rack (9) is parallel to the central axis of the tool holder.

2. The triaxial tool setting device according to claim 1, characterized in that: A cylindrical pin (15) is provided between the rack (9) and the probe (10), and both the rack (9) and the probe (10) are provided with pin holes that are interference fit with the cylindrical pin (15).

3. The three-axis tool setting device according to claim 1, characterized in that: The auxiliary components include a guide shaft (12) arranged parallel to the rack (9) and fixedly connected to the interior of the movable bracket (3), two return springs (13) symmetrically installed on the outer periphery of the guide shaft (12), and a guide plate (11) slidably sleeved on the outer periphery of the guide shaft (12) and located between the two return springs (13), with the top of the guide plate (11) and the groove opened at the bottom of the rack (9) being interference-fitted.

4. The triaxial tool setting device according to claim 1, characterized in that: The display includes a drive shaft (6) located directly above the rack (9) and rotatably connected to the movable bracket (3), a gear (5) fixedly installed on the outer periphery of the drive shaft (6) and meshing with the rack (9), a pointer (4) fixedly connected to the end of the drive shaft (6), and a dial located on the side of the movable bracket (3) and matching the pointer (4).

5. The triaxial tool setting device according to claim 4, characterized in that: The movable bracket (3) is equipped with a bearing (8), and the transmission shaft (6) is rotatably connected to the movable bracket (3) through the bearing (8).

6. The triaxial tool setting device according to claim 4, characterized in that: The two ends of the drive shaft (6) extend to the side of the movable bracket (3), and there is a gap between the pointer (4) and the movable bracket (3).

7. The triaxial tool setting device according to claim 1, characterized in that: The fixed bracket (1) is configured as an isosceles right-angled triangular prism structure, and the movable bracket (3) is configured as a right-angled trapezoidal column structure. The fixed bracket (1) and the movable bracket (3) are spliced ​​together to form a cuboid structure.

8. The three-axis tool setting device according to claim 7, characterized in that: A rotating shaft (2) is provided between the fixed bracket (1) and the movable bracket (3), and a connecting hole is provided on the side of the fixed bracket (1) and the movable bracket (3) that are in contact with each other. The fixed bracket (1) and the movable bracket (3) are connected to the rotating shaft (2) through the connecting hole.

9. The three-axis tool setting device according to claim 1, characterized in that: A connecting column (16) for connecting to the tool holder of the machine tool is fixedly installed on the fixed bracket (1).

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