Power tool turret of numerical control machine tool

Abstract

The invention discloses a numerical control machine tool power tool turret, which relates to the technical field of numerical control machine tools, and comprises a base, a mounting receiving disc and a rotary body, a three-fluted-disc indexing locking mechanism is arranged among the base, the mounting receiving disc and the rotary body, a tool disc is fixedly connected to the rotary body, the base is provided with a tool turret taper shank, and the rotary body is rotatably provided with a power input shaft. A power output shaft and a turning tool apron are rotationally mounted on the cutter head, and the power input shaft is in transmission connection with the power output shaft through a bevel gear pair; a linkage mechanism is arranged between the tool turret taper shank and the three-fluted-disc indexing locking mechanism, when the three-fluted-disc indexing locking mechanism is in a locking state, the linkage mechanism is disengaged from the tool turret taper shank, and when the three-fluted-disc indexing locking mechanism is in an opening state, the linkage mechanism is in transmission connection with the tool turret taper shank, and power of the tool turret taper shank is transmitted to the rotary body. Therefore, under the condition that main power transmission is not affected, the indexing of the power tool turret can be rapidly adjusted, and the machining efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of numerically controlled machine tools, and in particular to a power turret of a numerically controlled machine tool for efficient machining. Background Art

[0002] The powered tool turret is a key component of CNC turning and milling centers. While different powered tool turret models have varying numbers of tool stations, they generally require the coordination of a servo motor for the indexing rotary axis and a servo motor for the power input axis to achieve precision machining of the workpiece.

[0003] In the prior art, a Chinese patent application document is disclosed with the publication number 219582287U. The patent name is a five-axis power turret for a CNC machine tool. In the patent document, a coaxial speed change device is provided to cooperate with the power input shaft. The coaxial speed change device can adjust the indexing of the power turret and make the CNC machine tool more compact, thereby reducing production costs.

[0004] In actual use, when adjusting the indexing of the power turret of the CNC machine tool, the power source is independent, which not only makes the hardware installation of the entire device more complicated, but also requires the use of a large number of drivers to cooperate with the main power system of the indexing rotary axis servo motor and the power input shaft servo motor to complete the operation, so the cost is still relatively high. In the above patent, the installation of the indexing rotary axis servo motor and the power input shaft servo motor takes up a large space and requires the setting of a complex oil circuit connection device, which not only increases the manufacturing cost, but also has a complex structure, which can easily affect the processing accuracy of the CNC machine tool and affect the product quality. The automatic replacement and automatic adjustment of the power turret are completed separately and cannot be linked, so it cannot be adapted to some scenarios of rapid automatic tool replacement and rapid processing. Summary of the Invention

[0005] In order to overcome the above-mentioned defects, the purpose of the present invention is to provide a CNC machine tool power turret, which can achieve rapid adjustment of the power turret indexing without affecting the main power transmission, thereby improving processing efficiency.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a power tool turret of a CNC machine tool, comprising: a base, a mounting plate, a rotating body and a tool disc, the rotating body is rotatably mounted on the mounting plate, the mounting plate is detachably connected to the base, a three-tooth disc indexing locking mechanism is provided between the base, the mounting plate and the rotating body, the tool disc is fixedly connected to the rotating body, the base is installed with a tool turret taper handle, the rotating body is rotatably installed with a power input shaft, and the rotating body rotates around the axis of the power input shaft, the tool disc is rotatably installed with a power output shaft and a turning tool holder, the power input shaft and the power output shaft are connected by a bevel gear pair; a linkage mechanism is provided between the tool turret taper handle and the three-tooth disc indexing locking mechanism, when the three-tooth disc indexing locking mechanism is in a locked state, the linkage mechanism is disconnected from the tool turret taper handle, and when the three-tooth disc indexing locking mechanism is in an open state, the linkage mechanism is transmission-connected to the tool turret taper handle, so as to transmit the power of the tool turret taper handle to the rotating body.

[0007] Preferably, the three-sprocket indexing locking mechanism includes a indexing gear, a fixed gear, a stopping gear and a gear locking cylinder. The gear locking cylinder includes a first piston, which is installed in a first piston chamber of the base. The indexing gear is fixedly connected to the rotating body. The fixed gear is arranged on the outside of the indexing gear and fixedly connected to the mounting plate. The stopping gear is arranged on the first piston and corresponds to the indexing gear and the fixed gear.

[0008] Preferably, the linkage mechanism includes a driving gear disc, a gearing dial, a dial sliding sleeve and a piston follower disc, the driving gear disc is fixedly connected to the lower end surface of the turret tapered handle, the gearing dial is fixedly connected to the dial sliding sleeve, the piston follower disc is fixedly connected to the first piston, the dial sliding sleeve is slidably installed in the rotating body, and an elastic connection component is provided between the dial sliding sleeve and the rotating body; when the stopping gear disc is engaged with the indexing gear disc and the fixed gear disc at the same time, the piston follower disc presses the dial sliding sleeve to disengage the driving gear disc from the gearing dial, and when the stopping gear disc is disengaged from the indexing gear disc and the fixed gear disc, under the elastic force of the elastic connection component, the driving gear disc engages with the gearing dial, and the power of the turret tapered handle is transmitted to the rotating body.

[0009] Preferably, the elastic connection assembly includes a limit bolt and a dial push spring, the rod of the limit bolt passes through the dial sliding sleeve and is threadedly connected to the rotating body, one end face of the dial sliding sleeve abuts against the head of the limit bolt, and the dial push spring is sleeved on the limit bolt and clamped between the dial sliding sleeve and the rotating body.

[0010] Preferably, a first detection probe for detecting the position of the piston follower plate and a second detection probe for detecting the position of the dial sliding sleeve are provided in the base.

[0011] Preferably, a lifting and locking unit is provided in the base, and the lifting and locking unit is used to grab and connect the mounting plate. The lifting and locking unit includes a pull nail and a lifting and locking assembly used in conjunction with the pull nail.

[0012] Preferably, the lifting and locking assembly includes: a lifting and locking cylinder, which includes a second piston, which is accommodated in the second piston cavity of the base, and the bottom end of the second piston is axially provided with a lifting cavity for accommodating the pull nail; an annular block cover that is detachably mounted on the outside of the second piston cavity, and the bottom end of the second piston passes through the annular block cover and slides with the annular block cover; an elastomer, which is sleeved on the outside of the second piston, the top end of the elastomer abuts the second piston, and the bottom end of the elastomer abuts the annular block cover; a number of locking balls used in conjunction with the pull nail, the locking balls are arranged along the radial direction of the second piston, a locking hole for accommodating the locking balls is provided on the second piston, and a release cavity for cooperating with the locking balls to release the pull nail is provided on the outside of the annular block cover.

[0013] After adopting the above technical solution, the beneficial technical effects achieved by the present invention are:

[0014] When in use, the base is fixed on the ram of the CNC machine tool, the mounting plate is detachably connected to the base, the turret taper shank is connected to the ram spindle in the ram, and a linkage mechanism is provided between the three-toothed disc indexing locking mechanism and the turret taper shank. Under the action of this linkage mechanism, the power for the power turret indexing rotation also comes from the turret taper shank. When the rotary tool is performing cutting work, the three-toothed disc indexing locking mechanism is in a locked state under the control of the hydraulic system, the linkage mechanism is disconnected from the turret taper shank, and the main power from the turret taper shank is transmitted to the power output shaft, driving the tool rotation through the bevel gear pair; when the cutter head position needs to be adjusted, the three-toothed disc indexing locking mechanism is in an open state under the control of the hydraulic system, and the linkage mechanism is connected to the turret taper shank, transmitting the power of the turret taper shank to the rotating body, driving the rotating body to generate indexing rotation. By controlling a hydraulic system to control the linkage mechanism, the power turret indexing can be quickly adjusted without affecting the transmission of the main power. The two states can be switched at any time, and a servo motor and supporting parts for indexing can be directly reduced, which can effectively reduce the cost and size of the equipment, simplify installation, and reduce the manufacturing cost of the equipment.

[0015] In the present invention, the linkage mechanism adopts a mechanical linkage mechanism, wherein the driving sprocket is fixedly connected to the lower end face of the turret taper shank, the engaging dial is fixedly connected to the dial sliding sleeve, a piston follower is installed on the first piston of the three-sprocket indexing locking mechanism, and an elastic connection component is provided between the dial sliding sleeve and the rotating body. The structure is compact, the response is fast, and the use is reliable. Moreover, by adding some parts to the existing power turret equipment, the equipment can be modified and upgraded. The driving sprocket is provided on the lower end face of the turret taper shank, and the driving sprocket is engaged with the engaging dial to realize the transmission of the transfer power. During the meshing transmission process, the driving sprocket and the engaging dial can not only bear large torque, but also quickly disengage, without affecting the transmission of the main power, and the stability and transmission efficiency will be higher.

[0016] In the present invention, the base is equipped with a first detection probe and a second detection probe. The first detection probe is used to detect the position of the piston follower plate, thereby determining the position of the stop sprocket. The second detection probe is used to measure the position of the dial sliding sleeve, thereby determining whether the engagement dial and the drive sprocket are engaged or disengaged. If the dial push spring fails to compress or rebound due to a mechanical failure, the first and second detection probes can promptly send a signal, preventing damage to the device and improving its reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the power turret of the CNC machine tool of the present invention in the indexing state;

[0018] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0019] Figure 3 This is a schematic structural diagram of the power turret of a CNC machine tool of the present invention in a cutting working state;

[0020] Figure 4 yes Figure 3 Enlarged view of point B in the middle;

[0021] Figure 5 This is a schematic diagram of the distribution of the workstations (12 divisions) of the tool disc in the power tool turret of a CNC machine tool according to the present invention;

[0022] Figure 6 It is a schematic structural diagram of the exploded state of the base and the power turret in the power turret of the CNC machine tool of the present invention;

[0023] In the figure, 1, ram; 11, ram spindle; 12, cutter head; 13, spindle puller; 14, power output shaft; 15, turning tool holder; 16, bevel gear pair;

[0024] 2. Base; 21. Power input shaft; 22. Turret taper shank; 221. Drive gear plate; 23. Rotating body; 24. Mounting plate;

[0025] 3. Three-sprocket indexing locking mechanism; 31. First piston; 311. Piston follower; 32. Indexing gear; 33. Stop gear; 34. Fixed gear; 35. Dial sliding sleeve; 36. Elastic connecting assembly; 361. Dial push spring; 362. Limit bolt; 37. Engaging dial; 38. First detection probe; 39. Second detection probe;

[0026] 4. Lifting and locking unit; 41. Pull pin; 42. Second piston; 43. Elastomer; 44. Annular cover. DETAILED DESCRIPTION

[0027] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] See also Figure 1 、 Figure 3 The present invention provides a power turret for a numerically controlled machine tool, comprising: a base 2, a mounting plate 24, a rotary body 23 and a cutter disc 12. The rotary body 23 is rotatably mounted on the mounting plate 24. The mounting plate 24 is detachably connected to the base 2. A three-toothed disc indexing locking mechanism 3 is provided between the base 2, the mounting plate 24 and the rotary body 23. The cutter disc 12 is fixedly connected to the rotary body 23. The base 2 is equipped with a turret taper shank 22. The rotary body 23 is rotatably equipped with a power input shaft 21. The power input shaft 21 is used to transmit the main force to the power output shaft 14. The power output shaft 14 is generally equipped with a rotary tool, such as a milling cutter, a boring tool, etc. The turning tool holder 15 is used to install a turning tool, which is generally fixedly connected to the cutter disc 12 for turning processing. The rotary body 23 is used to adjust the indexing position of the power turret, see Figure 5 In the present invention, twelve indexing stations are shown, and commonly used indexing stations of different numbers such as eight and sixteen are also used.

[0029] See also Figure 2 、 Figure 4A linkage mechanism is provided between the turret taper shank 22 and the three-toothed disc indexing locking mechanism 3. When the three-toothed disc indexing locking mechanism 3 is in a locked state, the linkage mechanism is disconnected from the turret taper shank 22. When the three-toothed disc indexing locking mechanism 3 is in an open state, the linkage mechanism is transmission-connected to the turret taper shank 22, transmitting the power of the turret taper shank 22 to the rotary body 23. There are many types of linkage mechanisms. In addition to those introduced in the present invention, a hydraulic cylinder with a mutual self-locking function or a clutch device with a certain self-locking function can also be used. The linkage between the two components can be achieved by cooperating with electrical components. This part has many applications in mechanical transmission.

[0030] The three-sprocket indexing locking mechanism 3 of the present invention includes a indexing gear disc 32, a fixed gear disc 34, a stopping gear disc 33, and a gear disc locking cylinder. The gear disc locking cylinder includes a first piston 31, which is installed in the first piston 31 cavity of the base 2. The indexing gear disc 32 is fixedly connected to the rotating body 23. The fixed gear disc 34 is arranged on the outside of the indexing gear disc 32 and fixedly connected to the mounting plate 24. The stopping gear disc 33 is arranged on the first piston 31 and corresponds to the indexing gear disc 32 and the fixed gear disc 34. The indexing gear disc 32, the fixed gear disc 34, and the stopping gear disc 33 are used in conjunction with each other to adjust the indexing of the power tool turret. The three-sprocket indexing locking mechanism 3 is a mature prior art. See patent publication (publication) number: CN206883281U, patent application document entitled "Pentahedron CNC Machine Tool Angle Head Rotation Mechanism", which provides a more detailed description of the indexing adjustment of the power tool turret.

[0031] The linkage mechanism of the present invention includes a driving gear disc 221, a gear dial 37, a dial sliding sleeve 35 and a piston follower disc 311. The driving gear disc 221 is fixedly connected to the lower end surface of the turret taper handle 22, the gear dial 37 is fixedly connected to the dial sliding sleeve 35, the piston follower disc 311 is fixedly connected to the first piston 31, the dial sliding sleeve 35 is slidably installed in the rotating body 23, and an elastic connection group is provided between the dial sliding sleeve 35 and the rotating body 23. When the stop gear disc 33 is simultaneously engaged with the indexing gear disc 32 and the fixed gear disc 34, the piston follower disc 311 presses the dial sliding sleeve 35, causing the driving gear disc 221 to disengage from the gear dial 37. When the stop gear disc 33 is disengaged from the indexing gear disc 32 and the fixed gear disc 34, the elastic force of the elastic connection component 36 causes the driving gear disc 221 to engage with the gear dial 37, transmitting the power of the turret taper shank 22 to the rotating body 23. When indexing adjustment is required, the three-gear disc indexing locking mechanism 3 needs to be opened. Figure 1The power transmission process is as follows: the oil cylinder provides power, and the first piston 31 drives the stop gear disc 33 to move upward. The stop gear disc 33 disengages from the fixed gear disc 34 and the indexing gear disc 32. When the piston follower disc 311 moves upward, the dial sliding sleeve 35 is no longer under pressure. Under the elastic force of the dial push spring 361, the engagement dial 37 is driven upward. The engagement dial 37 engages with the drive gear disc 221, transmitting the power of the turret taper shank 22 to the rotating body 23. The turret taper shank 22 drives the rotating body 23 to rotate, thereby achieving the indexing adjustment of the power turret. After the power turret indexing is adjusted to the specified position, the first piston 31 moves downward, and after the stop gear disc 33 engages with the indexing gear disc 32 and the fixed gear disc 34, the angle is locked. When the stop gear plate 33 moves downward through the first piston 31, the piston follower plate 311 generates pressure on the dial sliding sleeve 35, and the dial sliding sleeve 35 drives the engaging dial 37 to move downward. The engaging dial 37 is disengaged from the driving gear plate 221, cutting off the power transmitted to the rotating body 23.

[0032] The elastic connection assembly 36 of the present invention includes a limit bolt 362 and a dial push spring 361. The stem of the limit bolt 362 passes through the dial sliding sleeve 35 and is threadedly connected to the rotating body 23. One end surface of the dial sliding sleeve 35 abuts the head of the limit bolt 362. The dial push spring 361 is sleeved around the limit bolt 362 and clamped between the dial sliding sleeve 35 and the rotating body 23. The limit bolt 362 is used to adjust the pressing force of the dial push spring 361 and limit the maximum position of the dial sliding sleeve 35, ensuring that the drive sprocket 221 and the engagement dial 37 are fully disengaged each time the first piston 31 reaches its lowest point. To further achieve automatic control and facilitate monitoring of the status of the three-sprocket indexing locking mechanism 3 and the position of the dial sliding sleeve 35, a first detection probe 38 for detecting the position of the piston follower plate 311 and a second detection probe 39 for detecting the position of the dial sliding sleeve 35 are provided within the base 2. The first detection probe 38 detects the position of the piston follower plate 311, thereby determining the position of the stop sprocket 33. The second detection probe 39 measures the position of the dial sliding sleeve 35, thereby determining whether the engagement dial 37 is engaged or disengaged with the drive sprocket 221. The first and second detection probes 38, 39 serve as a crucial detection mechanism. They provide a timely signal when the dial push spring 361 fails to compress or rebound due to mechanical failure, preventing damage to the device and improving its reliability.

[0033] The base 2 of the present invention is provided with a lifting and locking unit 4, which is used to grasp and connect the mounting plate 24. The lifting and locking unit 4 includes a pull nail 41 and a lifting and locking assembly used in conjunction with the pull nail 41. The lifting and locking unit 4 is used to further achieve automation and facilitate the automated installation of the power turret.

[0034] The lifting and locking assembly of the present invention includes: a lifting and locking oil cylinder, which includes a second piston 42, which is accommodated in the second piston 42 cavity of the base 2, and the bottom end of the second piston 42 is axially provided with a lifting cavity for accommodating the pull nail 41; an annular block cover 44 that is detachably mounted on the outside of the second piston 42 cavity, and the bottom end of the second piston 42 passes through the annular block cover 44 and slides with the annular block cover 44; an elastic body 43, which is sleeved on the outside of the second piston 42, the top end of the elastomer 43 abuts against the second piston 42, and the bottom end of the elastomer 43 abuts against the annular block cover 44; a number of locking balls used in conjunction with the pull nail 41, the locking balls are arranged along the radial direction of the second piston 42, and a locking hole for accommodating the locking ball is opened on the second piston 42, and a release cavity for cooperating with the locking ball to release the pull nail 41 is opened on the outside of the annular block cover 44. The lifting and locking assembly is a prior art and is generally used for automatic picking and placing of workpieces. It is described in more detail in the patent publication (publication) number CN206883281U, and will not be described in detail here.

[0035] See also Figure 6 The power turret of the present invention can be sold as a standalone product and is generally used in conjunction with a ram 1. Ram 1 houses a ram spindle 11 connected to a servo motor. After the power turret is engaged via spindle puller claws 13, the main power of the ram spindle 11 is transmitted via a bevel gear pair 16 to a power output shaft 14. This shaft 14 drives the tool to rotate, achieving machining.

[0036] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A power turret for a CNC machine tool, comprising: The base, the mounting plate, the rotary body and the cutter disc, the mounting plate is detachably connected to the base, the rotary body is rotatably mounted on the mounting plate, a three-toothed disc indexing locking mechanism is provided between the base, the mounting plate and the rotary body, the cutter disc is fixedly connected to the rotary body, the base is equipped with a turret taper shank, the rotary body is rotatably equipped with a power input shaft, and the rotary body rotates around the axis of the power input shaft, the cutter disc is rotatably equipped with a power output shaft and a turning tool seat, and the power input shaft and the power output shaft are connected via a bevel gear pair; it is characterized in that A linkage mechanism is provided between the turret taper shank and the three-tooth disc indexing locking mechanism. When the three-tooth disc indexing locking mechanism is in a locked state, the linkage mechanism is disconnected from the turret taper shank. When the three-tooth disc indexing locking mechanism is in an open state, the linkage mechanism is transmission-connected to the turret taper shank to transmit the power of the turret taper shank to the rotating body.

2. The CNC machine tool power turret according to claim 1, characterized in that: The three-sprocket indexing locking mechanism includes a scaling gear, a fixed gear, a stopping gear and a gear locking cylinder. The gear locking cylinder includes a first piston, which is installed in a first piston chamber of the base. The scaling gear is fixedly connected to the rotating body. The fixed gear is arranged on the outside of the scaling gear and fixedly connected to the mounting plate. The stopping gear is fixedly arranged on the first piston and corresponds to the scaling gear and the fixed gear.

3. The CNC machine tool power turret according to claim 2, characterized in that: The linkage mechanism includes a driving gear disc, a gear dial, a dial sliding sleeve and a piston follower plate, the driving gear disc is fixedly connected to the lower end surface of the turret taper handle, the gear dial is fixedly connected to the dial sliding sleeve, the piston follower plate is fixedly connected to the first piston, the dial sliding sleeve is slidably mounted on the rotating body, and an elastic connection component is provided between the dial sliding sleeve and the rotating body; when the stopping gear disc is engaged with the indexing gear disc and the fixed gear disc at the same time, the piston follower plate presses the dial sliding sleeve to disengage the driving gear disc from the gear dial, and when the stopping gear disc is disengaged from the indexing gear disc and the fixed gear disc, under the elastic force of the elastic connection component, the driving gear disc engages with the gear dial, thereby transmitting the power of the turret taper handle to the rotating body.

4. The CNC machine tool power turret according to claim 3, characterized in that: The elastic connection assembly includes a limiting bolt and a dial pushing spring. The rod of the limiting bolt passes through the dial sliding sleeve and is threadedly connected to the rotating body. One end surface of the dial sliding sleeve abuts against the head of the limiting bolt. The dial pushing spring is sleeved on the limiting bolt and clamped between the dial sliding sleeve and the rotating body.

5. The CNC machine tool power turret according to claim 3, characterized in that: A first detection probe for detecting the position of the piston follower plate and a second detection probe for detecting the position of the dial sliding sleeve are arranged in the base.

6. The CNC machine tool power turret according to claim 1, characterized in that: A lifting and locking unit is provided in the base, and the lifting and locking unit is used to grab and connect the mounting plate. The lifting and locking unit includes a pull nail and a lifting and locking assembly used in conjunction with the pull nail.

7. The CNC machine tool power turret according to claim 6, characterized in that: The lifting and locking assembly includes: a lifting and locking oil cylinder, wherein the lifting and locking oil cylinder includes a second piston, the second piston is accommodated in the second piston cavity of the base, and the bottom end of the second piston is axially opened with a lifting cavity for accommodating the pull rivet; an annular block cover that is detachably mounted on the outside of the second piston cavity, the bottom end of the second piston passes through the annular block cover and slidably cooperates with the annular block cover; an elastomer, the elastomer is sleeved on the outside of the second piston, the top end of the elastomer abuts the second piston, and the bottom end of the elastomer abuts the annular block cover; a plurality of locking balls used in conjunction with the pull rivet, the locking balls are arranged along the radial direction of the second piston, a locking hole for accommodating the locking balls is opened on the second piston, and a release cavity for cooperating with the locking balls to release the pull rivet is opened on the outside of the annular block cover.

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