Measuring head mounting seat of slant bed numerical control lathe and use method of measuring head mounting seat

Abstract

The invention belongs to the field of numerical control lathe on-machine measurement, and relates to a slant bed numerical control lathe measuring head mounting seat and a use method thereof. The mounting seat comprises a tool apron body; the tool apron body is divided into a tool apron mounting section and a measuring head mounting section; a tool apron mounting hole is formed in the tool apron mounting section and is used for mounting the tool apron body on a tool turret of the numerical control horizontal lathe; a measuring head mounting hole is formed in the measuring head mounting section, and the central axis of the measuring head mounting hole is perpendicular to the machine tool spindle; for different machine tools, a pair of end faces of the tool apron installation section or the measuring head installation section serve as installation positioning faces, and the installation positioning faces are attached to a positioning groove of a numerical control horizontal lathe tool turret.

Description

Technical Field

[0001] The invention belongs to the field of on-machine measurement of numerically controlled lathes, and relates to a probe mounting seat for a slant-bed numerically controlled lathe and a use method thereof. Background Art

[0002] The helicopter manufacturing industry is undergoing comprehensive automation and intelligent transformation and upgrading. When building automatic unmanned production lines for shaft parts, more demands are put forward for automatic alignment and on-machine measurement during part processing.

[0003] However, compared with the widespread use of automatic probes on CNC milling machines, automatic probes are still less used on CNC lathes. The main reason is that the existing CNC lathes all use the method of installing the probe on the tool holder using the inner hole tool, and the probe is horizontal after installation. When the tailstock is not used, the horizontally installed probe can measure the outer end face of the part and its adjacent inner and outer cylinders, but the measurement range is small due to the length of the probe. However, when machining parts such as bolts and slender shafts that require a tailstock, the use of the horizontally installed probe is severely limited even if a star-shaped probe is used.

[0004] At the same time, the probe needle of the horizontally mounted probe is very easy to be entangled with the flying cuttings during the processing, which not only affects the use but also easily causes damage to the probe. Summary of the invention

[0005] Purpose of the invention: To address the problems existing in the technical requirements and existing technical solutions, a mounting base and a method of using the mounting base are proposed, which can realize the fast, efficient and vertical installation of an automatic probe on a slant bed CNC lathe.

[0006] Technical Solution

[0007] In a first aspect, a probe mounting seat for a slant bed CNC lathe is provided, comprising: a tool holder body;

[0008] The tool holder body is divided into a tool holder installation section and a probe installation section;

[0009] The tool holder mounting section is provided with a tool holder mounting hole, and the tool holder mounting hole is used to mount the tool holder body to the turret of the CNC horizontal lathe; the probe mounting section is provided with a probe mounting hole, and the central axis of the probe mounting hole is perpendicular to the main shaft of the machine tool;

[0010] According to different machine tools, a pair of end faces of the tool holder mounting section or the probe mounting section are used as mounting positioning surfaces, and the positioning mounting surfaces are fitted with the positioning grooves of the turret of the CNC horizontal lathe.

[0011] Furthermore, a probe locking hole is also provided on the upper edge of the probe mounting section; a fixing bolt is screwed into the probe locking hole and presses the probe mounting handle in the probe mounting hole to achieve the installation and fixation of the probe.

[0012] The probe locking hole is a threaded hole.

[0013] The knife holder mounting hole is a countersunk hole.

[0014] The mounting base adopts an integrated molding design.

[0015] The size of the probe mounting hole must match the size of the selected probe handle to ensure that the installation clearance is no greater than 0.02mm. The dimensional tolerance of the mounting positioning surface must ensure that the matching clearance with the machine tool turret positioning groove is no greater than 0.04mm. The shape tolerance of the probe mounting hole and the mounting positioning surface must be guaranteed to be within 0.02mm.

[0016] In a second aspect, a method for using a probe mounting seat of a slant bed CNC lathe is provided, comprising:

[0017] When in use, fit the tool holder positioning surface with the positioning groove of the CNC horizontal lathe turret, then select the installation fixing bolt of the corresponding length to pass through the tool holder mounting hole and lock it, complete the installation of the tool holder body and the turret connection and positioning, after the connection is completed, insert the probe mounting handle into the probe mounting hole, select a certain length of fixing bolts to screw into the probe locking hole and tighten the probe mounting handle to complete the installation and fixation of the probe.

[0018] The method further comprises:

[0019] After the probe is installed on the tool holder, the probe is calibrated and a calibration rod with a size of D is installed on the lathe chuck. The total runout of the calibration rod is adjusted to within the preset range. The outer diameter of the calibration rod is measured using the probe and the measured value is recorded as D1. Then (D-D1) / 2 is the compensation value of the probe in the length direction.

[0020] Beneficial effects:

[0021] In response to the demand for on-machine measurement of a horizontal CNC lathe with an inclined bed, the present invention proposes a probe mounting seat for a CNC lathe with an inclined bed and a method of using the same, which can conveniently realize vertical installation of the probe, solves the problems of high requirements on use conditions, limited working conditions, small application range, and easy damage in the use of a horizontally installed probe on a CNC lathe, reduces the difficulty and cost of using the probe on the CNC lathe, expands the application range, and meets the needs of unmanned units or production lines for automatic alignment and on-machine measurement of CNC lathes. According to the design concept of the present invention, vertical installation of the probe can be realized on the turret of a commonly used horizontal CNC lathe with an inclined bed. The present invention has strong practicality and a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the present invention.

[0023] Among them, 1-tool holder mounting hole, 2-probe locking hole, 3-installation positioning surface, 4-probe mounting hole, 5-tool holder body. DETAILED DESCRIPTION

[0024] In view of the problems existing in the use of the existing horizontal installation of the probe using the inner hole tool holder, the present invention proposes a solution for quickly and efficiently realizing the vertical installation of the automatic probe on the CNC horizontal lathe, and puts forward the design ideas, manufacturing control points and use methods of the vertical probe mounting seat.

[0025] The tool holder installation includes a tool holder body 5, an installation positioning block (surface) 3, a probe installation hole 4, a probe locking hole 2, and a tool holder installation hole 1.

[0026] Furthermore, the probe locking hole 2 is a threaded hole.

[0027] Furthermore, the tool holder mounting hole 1 is a countersunk hole.

[0028] Among them, the size of the probe mounting hole 4 must match the size of the selected probe handle to ensure that the installation clearance is no more than 0.02mm, the size tolerance of the installation positioning block (surface) 3 must ensure that the matching clearance with the machine tool turret positioning groove is no more than 0.04mm, and the shape tolerance (verticality, parallelism) of the probe mounting hole 4 and the installation positioning block (surface) 3 must be ensured to be within 0.02mm.

[0029] In order to ensure the behavioral tolerance requirements, the installation positioning block (surface) 3 and the tool holder body 5 adopt an integrated design scheme. When processing the tool holder, the probe installation hole 4 and the installation positioning block (surface) 3 are processed and formed in one clamping.

[0030] When in use, fit the tool holder positioning block (surface) 3 with the positioning groove of the CNC lathe turret, then select the installation fixing bolt of the corresponding length to pass through the tool holder mounting hole 1 and lock it, complete the connection and positioning of the installation body 5 and the turret, and after the connection is completed, insert the probe mounting handle from the upper end into the probe mounting hole 4, select a certain length of fixing bolts to screw into the probe locking hole 2 and tighten the probe mounting handle to complete the installation and fixation of the probe.

[0031] After installing the probe using the tool holder, calibrate the probe and install a calibration rod with a size of D on the lathe chuck. Adjust the total runout of the calibration rod to within 0.003mm. Use the probe to measure the outer diameter of the calibration rod and record the measured value as D1. Then (D-D1) / 2 is the compensation value of the probe in the length direction.

[0032] The distance from the center axis of the probe mounting hole 4 to the mounting positioning surface 3 needs to be determined according to the positioning dimensions of the turret of the CNC lathe, and the position accuracy between the center axis of the probe mounting hole 4 and the machine tool spindle must be no greater than 0.05 mm.

[0033] like Figure 1As shown in the figure, direction A is the length direction of the probe mounting hole 4. When designing, the length of the probe mounting hole 4 needs to be comprehensively considered according to the structural form of the turret, the length of the probe, the interference size of the machine tool and other limiting conditions. Under the premise of ensuring the accessibility of the probe in the X-axis direction as much as possible, in order to ensure that the probe does not collide with the guide rail guard plate, tailstock, protective cover, etc. of the machine tool when changing the tool at the X-axis extreme position, the height of the probe mounting hole 4 should be able to ensure that there is a safety gap of not less than 3mm at the above-mentioned interference position after the probe is installed. If necessary, the following method can be used: Figure 1 The sunken design shown must also ensure that there is space in the length direction for arranging no less than two probe locking holes 2.

[0034] The central axis of the probe locking hole 2 should be perpendicular to the central axis of the probe mounting hole 4.

[0035] like Figure 1 As shown, direction B is the height direction of the probe mounting hole 4. In order to avoid the problem that the probe mounting seat protrudes too much from the turret of the CNC horizontal lathe during use, resulting in limited use range in the Z-axis direction, the height direction dimension of the probe mounting hole 4 needs to be designed according to the interference dimension of the maximum rotation diameter of the CNC horizontal lathe and the spindle or chuck in the Z-axis direction. Under the premise of meeting the requirements of probe installation space and strength, the height direction dimension of the probe mounting hole 4 should be reduced as much as possible. The height direction dimension of the probe mounting hole 4 = maximum outer diameter of the head + lateral installation clearance + minimum wall thickness of the probe mounting hole 4. The lateral installation clearance is 1 to 1.5 mm, and the minimum wall thickness of the probe mounting hole 4 is 3 to 5 mm.

[0036] At the same time, in order not to affect the use of the adjacent tool installation positions of the turret, chamfering is performed on both sides of the front end surface of the tool holder body, and the chamfering size is selected according to the rotation interference diameter of the CNC lathe chuck.

[0037] The center axis of the tool holder mounting hole 1 is perpendicular to the tool holder mounting surface of the CNC horizontal lathe turret. The quantity and positioning dimensions are designed according to the CNC horizontal lathe turret structure. The depth of the countersunk hole needs to be determined according to the selected countersunk bolt to ensure that the countersunk bolt does not protrude after installation.

[0038] Because the force on the probe during use is between 1N and 5N, which can be ignored, the probe mounting seat mainly bears the gravity of the probe and the probe mounting handle. In order to shorten the preparation cycle and reduce the preparation cost, the material of the probe mounting seat is pre-stretched aluminum plate, which will increase the processing difficulty of nylon and other materials with small processing deformation, good appearance accuracy retention, strong corrosion resistance, and no need for heat treatment and surface treatment.

Claims

1. A probe mounting seat for a slant bed CNC lathe, characterized in that: include: Knife holder body (5); The tool holder body is divided into a tool holder installation section and a probe installation section; The tool holder mounting section is provided with a tool holder mounting hole (1), and the tool holder mounting hole (1) is used to mount the tool holder body (5) on the turret of a CNC horizontal lathe; the probe mounting section is provided with a probe mounting hole (4), and the central axis of the probe mounting hole is perpendicular to the main axis of the machine tool; According to different machine tools, a pair of end faces of the tool holder installation section or the probe installation section are used as installation positioning surfaces (3), and the positioning installation surfaces are fitted with the positioning grooves of the turret of the CNC horizontal lathe.

2. The mounting seat according to claim 1, characterized in that: A probe locking hole (2) is also provided on the upper edge of the probe installation section; a fixing bolt is screwed into the probe locking hole (2) and presses the probe installation handle in the probe installation hole (4) to achieve installation and fixation of the probe.

3. The mounting seat according to claim 2, characterized in that: The probe locking hole (2) is a threaded hole.

4. The mounting seat according to claim 2, characterized in that: The knife holder mounting hole (1) is a countersunk hole.

5. The mounting seat according to claim 1, characterized in that: The mounting base adopts an integrated molding design.

6. The mounting seat according to claim 2, characterized in that: The size of the probe mounting hole (4) must match the size of the selected probe handle to ensure that the installation clearance is no greater than 0.02 mm. The size tolerance of the installation positioning surface (3) must ensure that the matching clearance with the machine tool turret positioning groove is no greater than 0.04 mm. The shape tolerance of the probe mounting hole (4) and the installation positioning surface (3) must be ensured to be within 0.02 mm.

7. A method for using the probe mounting seat of a slant bed CNC lathe according to any one of claims 1 to 6, characterized in that: include: When in use, fit the tool holder positioning surface with the positioning groove of the CNC horizontal lathe turret, then select the installation fixing bolt of the corresponding length to pass through the tool holder mounting hole and lock it, complete the installation of the tool holder body and the turret connection and positioning, after the connection is completed, insert the probe mounting handle into the probe mounting hole, select a certain length of fixing bolts to screw into the probe locking hole and tighten the probe mounting handle to complete the installation and fixation of the probe.

8. The method according to claim 7, characterized in that The method further comprises: After the probe is installed on the tool holder, the probe is calibrated and a calibration rod with a size of D is installed on the lathe chuck. The total runout of the calibration rod is adjusted to within the preset range. The outer diameter of the calibration rod is measured using the probe and the measured value is recorded as D1. Then (D-D1) / 2 is the compensation value of the probe in the length direction.

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