A new type of test bar processing equipment

Abstract

The utility model discloses a novel processing equipment of test bar relates to processing equipment technical field, including lathe body, headstock, tailstock, transverse bed saddle, longitudinal tool rest and drive system, still include grinding mechanism and double -channel independent control system of grinding wheel, and the headstock, tailstock are provided with respectively front centre and rear centre. The test bar blank is pressed against test bar blank through front centre and rear centre when going on lathe, and starts double -channel independent control system, realizes two sets of control, and first test bar blank is carried out to lathe processing to turning control mechanism, closes the control system switch of turning mechanism after processing the basic shape of test bar, opens the control system switch of grinding control mechanism, processes test bar stem with grinding wheel grinding mechanism, and test bar stem is smooth and even after processing, and the front middle and rear position size of stem part are identical, and when carrying out the tensile test, the test bar sample fracture position is reasonable, and the experimental data is effective.

Description

Technical Field

[0001] This utility model relates to the field of processing equipment technology, specifically to a new type of test bar processing equipment. Background Technology

[0002] Traditional test bar machining requires rough turning, finish turning, and grinding processes to be completed separately on a lathe and a grinding machine. Multiple clamping operations can easily lead to coaxiality errors, and the equipment switching efficiency is low. Existing technologies suffer from the following problems: most existing composite machine tools use a single control system, with high coupling between turning and grinding parameters, making independent optimization difficult. Therefore, it is necessary to design a high-precision test bar machining device that integrates turning and grinding functions and has an independent control channel to solve these problems. Summary of the Invention

[0003] This invention provides a novel processing equipment for test bars to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A novel test bar processing device includes a lathe body, a headstock, a tailstock, a transverse saddle, a longitudinal tool post, and a drive system, as well as a grinding wheel mechanism and a dual-channel independent control system.

[0006] The grinding wheel mechanism is equipped with a quick-change interface, and the grinding wheel mechanism can be detachably installed on the longitudinal tool holder through the quick-change interface.

[0007] The dual-channel independent control system also includes a turning control mechanism and a grinding control mechanism. The two are switched between working modes by setting an interlocking switch. The interlocking switch also includes a mechanical interlocking mechanism, an electrical interlocking mechanism, and a PLC controller.

[0008] The spindle box and tailstock are respectively equipped with a front center and a rear center, which together form a forced centering and positioning mechanism.

[0009] The above technical solution integrates turning, grinding and intelligent control into one unit. By incorporating a grinding wheel mechanism into a traditional lathe, one machine can complete two key processes: rough turning, semi-finishing and grinding. The independent control system with dual channels and interlocking switches enables individual control and improves work efficiency.

[0010] A further improvement of the present invention is that the grinding mechanism further includes a continuously variable speed motor, and the working part of the continuously variable speed motor is provided with a grinding wheel spindle, and the shaft end of the grinding wheel spindle is provided with an outer cylindrical grinding wheel.

[0011] Using the above technical solution, the output power of the grinding wheel spindle is ≥1.5kW, the precision-grade outer cylindrical grinding wheel with a built-in circulating water cooling channel has a grit size of 80-120 mesh, the spindle is connected by a tapered fitting sleeve, and the distance between the outer cylindrical surface of the grinding wheel and the axis of the workpiece is adjustable from 0.1 to 5mm.

[0012] The further improvement of this utility model lies in the following: the turning control mechanism independently controls the spindle frequency conversion speed regulation and tool post servo feed, and the grinding control mechanism is used to independently control the grinding wheel spindle stepless speed regulation and radial micro-feed mechanism.

[0013] Using the above technical solution, the turning control mechanism achieves dynamic adjustment of rotational speed and precise positioning of tool path. The radial micro-feed mechanism has a repeatability of ≤0.005mm, ensuring high-precision material removal control during the grinding process.

[0014] A further improvement of this utility model is that it also includes a coolant injection system, the injection direction of which is adjustable and points to the contact area between the grinding wheel and the workpiece, and the coolant flow control valve is integrated into the grinding control circuit.

[0015] A further improvement of this utility model is that the radial micro-feed mechanism includes a ball screw pair, a servo motor, and a linear guide rail, and is installed parallel to the workpiece axis.

[0016] A further improvement of this utility model is that the radial runout of the front and rear tips is ≤0.003mm, and the tip cone angle is 60°±0.5°.

[0017] A further improvement of this utility model is that a laser diameter measuring instrument is added to the side of the tailstock, and its signal output terminal is connected to the grinding control circuit to form a closed-loop dimension control system.

[0018] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0019] This utility model provides a new type of test bar processing equipment, which integrates turning, grinding and intelligent control into one unit. By building a grinding wheel mechanism on the basis of a traditional lathe, one machine can complete two key processes: rough turning, semi-finishing and grinding finishing. The dual-channel independent control system and interlocking switch enable individual control to improve work efficiency.

[0020] This utility model provides a novel processing equipment for test bars. When the test bar blank is loaded onto the lathe, it is held in place by a front center and a rear center. A dual-channel independent control system is activated to achieve two sets of control. The turning control mechanism first turns the test bar blank to form the basic shape of the test bar. Then, the control system switch of the turning mechanism is turned off, and the control system switch of the grinding control mechanism is turned on. The grinding mechanism uses a grinding wheel to process the bar rod. After processing, the bar rod is smooth and flat, and the front, middle and rear dimensions of the rod are consistent. When a tensile test is conducted, the fracture position of the test bar specimen is reasonable, and the experimental data is valid. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0023] Figure 3 This utility model Figure 1 Schematic diagram of the middle section.

[0024] In the diagram: 1. Lathe body; 2. Spindle box; 3. Tailstock; 4. Transverse saddle; 5. Longitudinal tool post; 6. Grinding wheel mechanism; 7. Dual-channel independent control system; 8. Interlocking switch; 9. Quick-change interface; 10. Forward center; 11. Rear center; 12. Steplessly variable speed motor; 13. Grinding wheel spindle; 14. External cylindrical grinding wheel; 15. Tool post servo feed mechanism; 16. PLC controller. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to embodiments: Example 1

[0026] like Figure 1-3 As shown, this utility model provides a new type of test bar processing equipment, including a lathe body 1, a spindle box 2, a tailstock 3, a transverse saddle 4, a longitudinal tool post 5 and a drive system, as well as a grinding wheel grinding mechanism 6 and a dual-channel independent control system 7.

[0027] The grinding wheel mechanism 6 is equipped with a quick-change interface 9, and the grinding wheel mechanism 6 can be detachably installed on the longitudinal tool holder 5 through the quick-change interface 9;

[0028] The dual-channel independent control system 7 includes an interlock switch 8. The dual-channel independent control system 7 also includes a physically isolated turning control mechanism and a grinding control mechanism. The two are switched in working mode through the interlock switch 8. The interlock switch 8 also includes a mechanical interlock mechanism, an electrical interlock mechanism, and a PLC controller 16.

[0029] The spindle box 2 and the tailstock 3 are respectively equipped with a front center 10 and a rear center 11, which constitute a forced centering and positioning mechanism.

[0030] In this embodiment, by integrating turning, grinding and intelligent control functions into one unit, and by building a grinding wheel grinding mechanism 6 on the basis of a traditional lathe, one machine can complete two key processes: rough turning, semi-finishing and grinding finishing. By setting up a dual-channel independent control system 7 and an interlocking switch 8, individual control is achieved to improve work efficiency.

[0031] Working principle: When the test bar blank is mounted on the lathe, it is held in place by the front center 10 and the rear center 11. The dual-channel independent control system 7 is activated to achieve two sets of control. The turning control mechanism first turns the test bar blank to form the basic shape of the test bar. Then, the control system switch of the turning mechanism is turned off, and the control system switch of the grinding control mechanism is turned on. The grinding wheel grinding mechanism 6 is used to process the bar rod. After processing, the bar rod is smooth and flat, and the front, middle and rear dimensions of the rod are consistent. When the tensile test is performed, the fracture position of the test bar specimen is reasonable, and the experimental data is valid. Example 2

[0032] like Figure 1-3 As shown, based on Embodiment 1, this utility model provides a technical solution, a novel test bar processing equipment, the grinding wheel mechanism 6 further includes a continuously variable speed motor 12, and a grinding wheel spindle 13 is provided at the working part of the continuously variable speed motor 12. An outer cylindrical grinding wheel 14 is provided at the shaft end of the grinding wheel spindle 13. In this embodiment, the output power of the grinding wheel spindle 13 is ≥1.5kW, the precision-grade outer cylindrical grinding wheel 14 with a built-in circulating water cooling channel has a grit size of 80-120 mesh, and is connected to the spindle through a tapered fitting sleeve. The distance between the outer cylindrical surface of the grinding wheel and the workpiece axis is adjustable in the range of 0.1-5mm. The turning control mechanism independently controls the spindle frequency conversion speed regulation and the tool post servo feed 15, and the grinding control mechanism is used to independently control the continuously variable speed regulation of the grinding wheel spindle and the radial micro-feed mechanism.

[0033] The turning control mechanism enables dynamic adjustment of rotational speed and precise positioning of tool path. The radial micro-feed mechanism has a repeatability of ≤0.005mm, ensuring high-precision material removal control during the grinding process. It also includes a coolant spray system with adjustable nozzle spray direction pointing towards the grinding wheel-workpiece contact area. The coolant flow control valve is integrated into the grinding control circuit. The radial micro-feed mechanism includes a ball screw pair, a servo motor, and a linear guide, which are installed parallel to the workpiece axis. The radial runout of the front center 10 and the rear center 11 is ≤0.003mm, and the center cone angle is 60°±0.5°. A laser diameter gauge is added to the side of the tailstock 3, and its signal output terminal is connected to the grinding control circuit to form a closed-loop dimension control system.

Claims

1. A novel processing equipment for test bars, comprising a lathe body (1), a headstock (2), a tailstock (3), a transverse saddle (4), a longitudinal tool post (5), and a drive system, characterized in that: It also includes a grinding wheel mechanism (6) and a dual-channel independent control system (7); The grinding wheel mechanism (6) is provided with a quick-change interface (9), and the grinding wheel mechanism (6) can be detachably installed on the longitudinal tool holder (5) through the quick-change interface (9); The dual-channel independent control system (7) includes an interlock switch (8). The dual-channel independent control system (7) also includes a physically isolated turning control mechanism and a grinding control mechanism. The two are switched in working mode by setting an interlock switch (8). The interlock switch (8) also includes a mechanical interlock mechanism, an electrical interlock mechanism and a PLC controller (16). The spindle box (2) and tailstock (3) are respectively provided with front center (10) and rear center (11), which constitute a forced centering and positioning mechanism.

2. The processing equipment for a novel test bar according to claim 1, characterized in that: The grinding mechanism (6) also includes a continuously variable speed motor (12), and a grinding wheel spindle (13) is provided at the working part of the continuously variable speed motor (12), and an outer cylindrical grinding wheel (14) is provided at the shaft end of the grinding wheel spindle (13).

3. The processing equipment for a novel test bar according to claim 1, characterized in that: The turning control mechanism independently controls the spindle frequency conversion speed regulation and the tool post servo feed mechanism (15), while the grinding control mechanism is used to independently control the grinding wheel spindle stepless speed regulation and the radial micro-feed mechanism.

4. The processing equipment for a novel test bar according to claim 1, characterized in that: It also includes a coolant injection system with adjustable nozzles that point towards the grinding wheel-workpiece contact area, and a coolant flow control valve integrated into the grinding control circuit.

5. The processing equipment for a novel test bar according to claim 3, characterized in that: The radial micro-feed mechanism includes a ball screw pair, a servo motor, and a linear guide, and is installed parallel to the workpiece axis.

6. The processing equipment for a novel test bar according to claim 1, characterized in that: The radial runout of the front tip (10) and the rear tip (11) is ≤0.003mm, and the tip cone angle is 60°±0.5°.

7. The processing equipment for a novel test bar according to claim 1, characterized in that: A laser diameter measuring instrument is added to the side of the tailstock (3), and its signal output terminal is connected to the grinding control circuit to form a closed-loop size control system.

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