Tool clamp for machining features on circumference of tool turret of numerical control lathe

Abstract

The utility model discloses a work fixture for characteristic processing on the circumference of a tool turret of a numerical control lathe, which is used for rotary parts on a vertical processing center and comprises a heightening base plate which is arranged on a working table of the processing center and is detachably connected with the working table and a servo system of the processing center. And the four-axis index plate is detachably connected to the servo system and is in key connection with the heightening base plate. And the four-axis connecting disc is arranged on the side wall of the four-axis index plate, the central part of the four-axis connecting disc is in clearance fit with the four-axis index plate, and the side wall of the four-axis connecting disc is in threaded connection with the four-axis index plate. The jackscrew pressing plate is arranged on the heightening base plate, and the upper portion of the jackscrew pressing plate presses the lower portion of the servo system and is in threaded connection with the heightening base plate. The heightening base plate and the workbench are detachably connected so that the damaged heightening base plate can be conveniently replaced, relative positioning between the heightening base plate and the four-axis dividing plate is achieved in a key connection mode, transmission and conversion from the four-axis dividing plate to the four-axis connecting plate and then to the tool turret reference are achieved, reference transmission can be kept consistent, the reference conversion precision is high, and the machining precision is high. And the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of processing features on the circumference of rotary parts, in particular to a tool fixture used for processing features on the circumference of a turret of a numerically controlled lathe. Background Art

[0002] The turret on a CNC lathe is an important accessory used on CNC lathes, also known as a CNC turret or lathe turret. It acts directly on the workpiece and is used to fix the processing tool. It is one of the core components of the CNC lathe for processing. Its functions mainly include providing main motion and feed motion, and being used for high-precision processing.

[0003] In the process of rotating parts, the turret is responsible for tool replacement and tool holding in CNC lathes. Based on the repeated positioning function of the turret, its structure, shape of each part, position accuracy and dimensional accuracy are required to be very high, all within 0.01. Normally, the turret is used in the machining center to use the B-axis rotary indexing to achieve multi-faceted processing of the workpiece. It needs to be rotated through a certain angle together with the workpiece to change the position of the processing surface and perform multi-station processing. However, this processing process requires the redetermination of the reference point or reference plane of the rotation center of the workpiece, and multiple clamping and positioning of the parts are required, which causes errors in the reference conversion and makes it difficult to maintain consistency in the reference transfer, resulting in high costs for rotary parts and low equipment space utilization, resulting in waste of machine tool resources.

[0004] Therefore, when using the turret in the vertical machining center, there are problems such as difficulty in maintaining consistent datum transfer and errors in datum conversion, which lead to high costs and waste of machine tool resources. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a fixture for processing features on the circumference of a CNC lathe turret, which clamps the rotary parts at one time through a heightened pad, a four-axis dividing plate, a four-axis connecting plate and a screw pressure plate.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] A fixture for machining features on the circumference of a turret of a CNC lathe, used for rotating parts on a vertical machining center, comprising:

[0008] The heightening pad is set on the workbench of the machining center and is detachably connected to the workbench and the servo system of the machining center.

[0009] The four-axis indexing plate is disassembled and connected to the driver's service system and connected to the heightening pad key.

[0010] The four-axis connecting plate is arranged on the side wall of the four-axis dividing plate, the center portion of the four-axis connecting plate is in clearance with the four-axis dividing plate, and the side wall is screwed to the four-axis dividing plate.

[0011] The top screw pressure plate is set on the raising pad, and its upper part is pressed against the lower part of the servo system and is screwed to the raising pad to press the servo system raising pad onto the workbench through bolts.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] The removable connection between the heightening plate and the worktable facilitates replacement of damaged ones. A keyed connection allows for relative positioning between the heightening plate and the four-axis indexing plate. A screw clamp secures the heightening plate to the worktable, ensuring excellent centering and easy assembly and disassembly. Clearance fit and threaded connections enable the transfer and conversion of the datum from the four-axis indexing plate to the four-axis connecting plate and then to the turret, ensuring consistent datum transfer and high datum conversion accuracy, ultimately reducing costs.

[0014] Further preferably, a key slot is provided on the heightening pad, the key slot is connected to the servo system key, and the direction of the key slot is consistent with the direction of the workbench.

[0015] By adopting the above technical solution, a key connection is formed between the heightening pad and the servo system through the keyway, thereby realizing the relative positioning of the heightening pad and the four-axis indexing plate.

[0016] More preferably, the driver service system includes:

[0017] The base is arranged on the heightening pad and is connected with the heightening pad by bolts.

[0018] The positioning bar is fixed on the base, spans the upper sides of the keyway and is perpendicular to the keyway.

[0019] The first positioning key is arranged on the base, with its end passing through the key slot and abutting against the workbench, and its top surface extending out of the base and being screwed into the key slot.

[0020] The second positioning key is provided on the base, located between the positioning strip and the inner side of the driver's service system, and is screwed to the keyway to cooperate with the first positioning key to fix the base on the height-increasing pad.

[0021] The locking bolt is located on the base, and its end passes through the base and the heightening pad and abuts against the workbench.

[0022] By adopting the above technical solution, the entire servo system is connected to the workbench through the base and the heightened pad. The first positioning key and the second positioning key completely confine the base to the heightened pad, and then to the workbench surface, thereby forming a unique fixed reference point or reference plane, so that the reference transfer can remain consistent and ensure high accuracy of the reference conversion.

[0023] More preferably, the four-axis connecting disc is respectively provided with:

[0024] The pin hole is opened on the side wall of the four-axis connecting plate and is connected to the lathe turret pin.

[0025] The locking hole is opened on the four-axis connecting plate, located on the same side wall as the pin hole, and is connected to the lathe turret bolt.

[0026] The boss is arranged at the geometric center of the four-axis connecting disk and is clearance-matched with the four-axis dividing disk.

[0027] By adopting the above technical solution, the turret and the four-axis connecting plate are well locked together by installing the locating pin into the pin hole and the hexagonal bolt into the locking hole; the clearance fit between the boss and the four-axis dividing plate realizes the clearance fit between the four-axis connecting plate and the four-axis dividing plate, thereby realizing the transmission and transformation from the four-axis dividing plate to the four-axis connecting plate and then to the turret datum.

[0028] Further optimization is that a reference hole is opened at the center of the four-axis dividing plate, and the reference hole and the boss are clearance-matched.

[0029] By adopting the above technical solution, the clearance fit between the boss and the four-axis indexing plate is achieved through the reference hole.

[0030] Further optimization is that the number of pin holes is 2, located on the upper part of the side wall of the four-axis connecting plate.

[0031] By adopting the above technical solution, the two pin holes can accurately locate the position of the four-axis connecting plate on the four-axis dividing plate.

[0032] Further optimization is that the number of locking holes is at least 4, and they are distributed in a circle around the geometric center of the four-axis connecting disk.

[0033] The above technical solution facilitates the locking connection of the four-axis connecting disk and the four-axis dividing disk on the circumference.

[0034] Further optimization is that the top screw pressure plate is L-shaped, and its bottom surface is connected to the heightening pad by bolts.

[0035] By adopting the above technical solution, the base is pressed against the heightening pad and the heightening pad is installed and connected to the workbench at the same time, so that the installation is completed in one go.

[0036] Further optimization is that the first positioning key and the second positioning key both adopt T-nuts.

[0037] By adopting the above technical solution, the base can be installed on the height-raising pad by means of key connection.

[0038] Further optimization is that the locking bolt uses a hexagonal bolt.

[0039] By adopting the above technical solution, the base and the height-increasing pad can be locked. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 Schematic diagram of the structure of this embodiment.

[0041] Figure 2 Schematic diagram of the structure of the top screw pressing plate in this embodiment.

[0042] Figure 3 Schematic diagram of the hardware structure of the driver service system in this embodiment.

[0043] Figure 4 Schematic diagram of the structure of the heightened pad in this embodiment.

[0044] Figure 5 Schematic diagram of the structure of the boss in this embodiment.

[0045] Figure 6 Schematic diagram of the structure of the four-axis connecting disk in this embodiment.

[0046] Figure 7 This is a schematic structural diagram of the four-sided indexing plate in this embodiment.

[0047] Figure 8 It is a schematic structural diagram of the pin hole and locking hole in this embodiment.

[0048] Figure markings: 1-heightening pad; 11-keyway; 2-four-axis indexing plate; 21-reference hole; 3-four-axis connecting plate; 31-pin hole; 32-locking hole; 33-boss; 4-CNC turret; 5-screw pressure plate; 6-workbench; 7-servo system; 71-base; 72-positioning bar; 73-first positioning key; 74-second positioning key; 75-locking bolt. DETAILED DESCRIPTION

[0049] The following is combined with Figures 1-8 The utility model is further introduced in detail.

[0050] A fixture for machining features on the circumference of a CNC lathe turret, such as Figure 1 As shown, it is used to turn parts on vertical machining centers, including:

[0051] The heightening pad 1 is arranged on the workbench 6 of the machining center, and is detachably connected to the workbench 6 and the servo system 7 of the machining center.

[0052] The four-axis indexing plate 2 is disassembled and connected to the servo system 7 and connected with the heightening pad 1 by a key.

[0053] The four-axis connecting plate 3 is arranged on the side wall of the four-axis dividing plate 2. The center portion thereof is clearance-matched with the four-axis dividing plate 2, and the side wall is screwed to the four-axis dividing plate 2.

[0054] The top screw pressing plate 5 is arranged on the heightening pad 1, as shown in FIG. Figure 2 As shown, its upper portion is pressed against the lower portion of the servo system 7 and is screwed to the heightened pad 1 , so as to press the heightened pad 1 of the servo system 7 against the workbench 6 by means of bolts.

[0055] The removable connection between the heightening plate 1 and the worktable 6 facilitates replacement of damaged heightening plates 1. Furthermore, a keyed connection ensures relative positioning between the heightening plate 1 and the four-axis indexing plate 2. A screw clamp 5 secures the heightening plate 1 to the worktable 6, providing excellent centering and easy assembly and disassembly. Clearance fit and threaded connections enable the transfer and transformation of the four-axis indexing plate 2, the four-axis connecting plate 3, and then the turret datum, ensuring consistent transfer and high-precision datum transformation, thereby reducing costs.

[0056] Specifically, such as Figure 1 、 Figure 3 as well as Figure 4 As shown, in this embodiment, a key slot 11 is provided on the heightening pad 1, and the key slot 11 is key-connected to the servo system 7, and its opening direction is consistent with the direction of the workbench 6. The key slot 11 is used to form a key connection between the heightening pad 1 and the servo system 7, thereby realizing the relative positioning of the heightening pad 1 and the four-axis dividing plate 2.

[0057] Specifically, such as Figure 1 and Figure 3 As shown, the driver service system 7 in this embodiment includes:

[0058] The base 71 is provided on the height-increasing pad 1 and is connected to the height-increasing pad 1 by bolts.

[0059] The positioning bar 72 is fixed on the base 71 , spanning over both sides of the upper portion of the key slot 11 and being perpendicular to the key slot 11 .

[0060] The first positioning key 73 is set on the base 71, with its end passing through the key slot 11 and abutting against the workbench 6, and the top surface extending out of the base 71 and screwed into the key slot 11 to achieve positioning of one end of the base 71 and the height-increasing pad 1 on the workbench 6.

[0061] The second positioning key 74 is set on the base 71, located between the positioning bar 72 and the inner side of the servo system 7, screwed to the key slot 11, and opposite to the position of the first positioning key 73. It is used to cooperate with the first positioning key 73 to fix the base 71 on the heightening pad 1, and then realize the fixing of the servo system 7 on the workbench 6 together with the first positioning key 73.

[0062] The locking bolt 75 is located on the base 71 , and its end passes through the base 71 and the height-increasing pad 1 , and abuts against the workbench 6 , thereby locking the base 71 and the height-increasing pad 1 together on the workbench 6 .

[0063] The entire servo system 7 is connected to the workbench 6 through the base 71 and the heightened pad 1. The first positioning key 73 and the second positioning key 74 completely confine the base 71 on the heightened pad 1, and then confine it to the surface of the workbench 6, forming a unique fixed reference point or reference plane, so that the reference transfer can remain consistent and ensure high accuracy of the reference conversion.

[0064] Specifically, such as Figure 1 、 Figure 5 as well as Figure 6 As shown, in this embodiment, the four-axis connecting plate 3 is respectively provided with:

[0065] The pin hole 31 is provided on the side wall of the four-axis connecting plate 3 and is connected to the pin of the lathe turret. The interior of the pin hole 31 is adapted to the positioning pin on the turret.

[0066] The locking hole 32 is provided on the four-axis connecting plate 3 and is located on the same side wall as the pin hole 31 , and is bolted to the lathe turret to achieve a locking connection with the turret.

[0067] The boss 33 is arranged at the geometric center of the four-axis connecting disk 3 and is clearance-matched with the four-axis indexing disk 2 .

[0068] By installing the locating pin into the pin hole 31 and the hexagonal bolt into the locking hole 32, the turret and the four-axis connecting disk 3 are well locked together; the clearance fit between the boss 33 and the four-axis dividing disk 2 realizes the clearance fit between the four-axis connecting disk 3 and the four-axis dividing disk 2, thereby realizing the transmission and transformation from the four-axis dividing disk 2 to the four-axis connecting disk 3 and then to the turret datum.

[0069] Specifically, such as Figure 1 、 Figure 5 、 Figure 6 、 Figure 7 as well as Figure 8 As shown, in this embodiment, a reference hole 21 is opened at the center of the four-axis indexing plate 2, and the reference hole 21 is clearance-matched with the boss 33, and the clearance fit between the boss 33 and the four-axis indexing plate 2 is achieved through the reference hole 21.

[0070] Specifically, such as Figure 6 As shown, in this embodiment, there are two pin holes 31 located on the upper side wall of the four-axis connecting disk 3. The two pin holes 31 can accurately position the four-axis connecting disk 3 on the four-axis dividing disk 2.

[0071] Specifically, such as Figure 6As shown, in this embodiment, the number of locking holes 32 is at least 4, and they are circumferentially distributed around the geometric center of the four-axis connecting disk 3, so as to facilitate the circumferential locking connection between the four-axis connecting disk 3 and the four-axis dividing disk 2.

[0072] Specifically, such as Figure 2 As shown, in this embodiment, the top screw pressure plate 5 is L-shaped, and its bottom surface is connected to the heightening pad 1 by bolts, so that the base 71 is pressed against the heightening pad 1 while the heightening pad 1 is installed and connected to the workbench 6, thereby completing the installation in one go.

[0073] Specifically, such as Figure 3 As shown, in this embodiment, the first positioning key 73 and the second positioning key 74 are both T-nuts, so that the base 71 is installed on the height-increasing pad 1 through key connection.

[0074] Specifically, such as Figure 2 As shown, in this embodiment, the locking bolt 75 is a hexagonal bolt, which can lock the base 71 and the height-increasing pad 1.

[0075] Please combine Figures 1-8 The principle process of this embodiment is described as follows:

[0076] During the machining process, the rotary parts are mounted on the four-axis connecting plates. Since the four-axis indexing plate 2 is connected to the servo system 7, the servo system 7 controls the four-axis indexing plate 2 to rotate a certain angle after it is operated, thereby driving the four-axis connecting plate 3 to rotate, so that the four-axis indexing plate 2 can accurately divide the rotation angle. When rotating the parts, it is only necessary for the servo system 7 to control the four-axis indexing plate to rotate and then drive the four-axis connecting plate 3 to rotate, so that the rotary parts can be rotated a certain angle, thereby achieving the machining of the features on the circumference of the rotary parts to meet the dimensional requirements of the product drawings. In this way, the four-axis features of the rotary parts can be processed on the vertical machining center through one-time clamping, avoiding multiple clamping and positioning of parts. By increasing the pad 1, the four-axis connecting plate 3, the four-axis indexing plate 2 and the top screw pressure plate 5, one-time positioning and benchmarking are completed, reducing benchmark conversion errors and ensuring the consistency of benchmark transmission, thereby reducing the cost of rotary parts, improving the low utilization rate of equipment space, and reducing the waste of machine tool resources; it also expands the scope of use of the equipment and reduces labor intensity.

[0077] This specific embodiment is merely an explanation of the utility model and is not a limitation of the utility model. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed, but as long as they are within the scope of protection of the utility model, they are protected by patent law.

Claims

1. A fixture for machining features on the circumference of a CNC lathe turret, used for machining rotary parts on a vertical machining center, characterized in that: include: A heightening pad (1) is arranged on a workbench (6) of a machining center and is detachably connected to the workbench (6) and a servo system (7) of the machining center; A four-axis indexing plate (2) is provided on the servo system (7) and is key-connected to the height-raising pad (1); A four-axis connecting disk (3) is arranged on the side wall of the four-axis indexing disk (2), with its center portion being clearance-matched with the four-axis indexing disk (2), and the side wall being screwed to the four-axis indexing disk (2); A top screw pressure plate (5) is provided on the heightening pad (1), with its upper portion pressed against the lower portion of the servo system (7) and screwed to the heightening pad (1), and is used to press the servo system (7) and the heightening pad (1) onto the workbench (6) via bolts.

2. The fixture for machining features on the circumference of a turret of a CNC lathe according to claim 1, characterized in that: A keyway (11) is provided on the height-increasing pad (1), the keyway (11) is key-connected to the servo system (7), and its opening direction is consistent with the direction of the workbench (6).

3. The fixture for machining features on the circumference of a turret of a CNC lathe according to claim 2, characterized in that: The driver service system (7) includes: A base (71) is provided on the height-increasing pad (1) and is bolted to the height-increasing pad (1); A positioning bar (72) is fixed on the base (71), spanning both sides of the upper portion of the key slot (11) and perpendicular to the key slot (11); A first positioning key (73) is provided on the base (71), an end portion of which passes through the key slot (11) and abuts against the workbench (6), and a top surface of which extends out of the base (71) and is screwed to the key slot (11); A second positioning key (74) is provided on the base (71), is located between the positioning strip (72) and the inner side of the servo system (7), is screwed to the keyway (11), and is used to cooperate with the first positioning key (73) to fix the base (71) on the height-increasing pad (1); A locking bolt (75) is located on the base (71), and an end portion thereof passes through the base (71) and the height-increasing pad (1) and abuts against the workbench (6).

4. The fixture for machining features on the circumference of a turret of a CNC lathe according to claim 1, characterized in that: The four-axis connecting plate (3) is respectively provided with: A pin hole (31) is provided on the side wall of the four-axis connecting plate (3) and is connected to the lathe turret pin; A locking hole (32) is provided on the four-axis connecting plate (3), is located on the same side wall as the pin hole (31), and is bolted to the lathe turret; The boss (33) is arranged at the geometric center of the four-axis connecting disk (3) and is clearance-matched with the four-axis indexing disk (2).

5. The fixture for machining features on the circumference of a turret of a CNC lathe according to claim 4, characterized in that: A reference hole (21) is provided at the center of the four-axis indexing plate (2), and the reference hole (21) is clearance-matched with the boss (33).

6. The fixture for machining features on the circumference of a turret of a CNC lathe according to claim 4, characterized in that: The number of the pin holes (31) is two and they are located on the upper part of the side wall of the four-axis connecting disk (3).

7. The fixture for machining features on the circumference of a turret of a CNC lathe according to claim 5, characterized in that: The number of the locking holes (32) is at least 4 and they are distributed in a circular pattern around the geometric center of the four-axis connecting disk (3).

8. The fixture for machining features on the circumference of a turret of a CNC lathe according to claim 5, characterized in that: The top screw pressing plate (5) is L-shaped, and its bottom surface is connected to the height-increasing pad (1) via bolts.

9. The fixture for machining features on the circumference of a turret of a CNC lathe according to claim 3, characterized in that: The first positioning key (73) and the second positioning key (74) are both T-shaped nuts.

10. The fixture for machining features on the circumference of a turret of a CNC lathe according to claim 3, characterized in that: The locking bolt (75) is a hexagonal bolt.

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