Turning clamp and lathe

Abstract

The utility model discloses a turning clamp and a lathe in the technical field of machining. The turning clamp comprises a base and a plurality of first pull rods, the first pull rods are telescopically connected to the base, the telescopic direction of the first pull rods is perpendicular to the front end face of the base, pressing plates are connected to the first pull rods, the first pull rods stretch out and draw back to drive the pressing plates to rotate so as to fix a workpiece to the front end face of the base, and the turning clamp further comprises a transverse pull rod and a pull rod connector. A through hole perpendicular to the front end face of the base is formed in the base, and the first pull rod penetrates through the through hole. The first pull rod penetrates through the through hole to be connected to the transverse pull rod. The pull rod connector is used for fixing the transverse pull rod to a pull rod of a lathe. According to the lathe, the transverse pull rod and the pull rod connector are additionally arranged, so that the main shaft pull rod of the lathe provides power, special hydraulic equipment is not needed, an oil duct does not need to be additionally arranged, and the driving structure is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of machining, in particular to a turning fixture and a lathe. Background Art

[0002] The turning fixture structures used in existing CNC lathes mainly include claw type, spring clamp (expansion clamp) type, press-fit type, etc. Different types of clamping structures have their own advantages and disadvantages: the claw type has a wide range of applications, simple structure, easy use, has formed standardization and serialization, and has low cost; but it can only clamp products with regular outlines, and it is difficult to clamp products with special-shaped structures, which limits its application range; at the same time, it is easy to cause some products with weak rigidity to deform greatly, which is not conducive to the guarantee of size and produces waste. The spring clamp (expansion clamp) type is easy to use, but the structure is relatively complex, the cost is high, and the clamping force is relatively small. It cannot be used for heavy-load turning processing, which limits the improvement of product processing efficiency. The press-fit type has a complex structure and high cost. It can be used for clamping products with special structures. It has a firm clamping, small product deformation, and small dimensional fluctuation. At the same time, it can be turned under heavy load, which is conducive to improving production efficiency.

[0003] Chinese patent: CN219152244U discloses a press-fit lathe fixture, including a base, a plurality of hydraulic cylinders fixed on the top of the base, a telescopic head slidably connected to the top of the hydraulic cylinder, a pressure plate hinged at the end of the telescopic head, a rotating plate hinged between the pressure plate and the hydraulic cylinder, and the rotating plate is controlled to rotate by the plurality of hydraulic cylinders to fix the parts.

[0004] The above-mentioned lathe fixture has the following problems: 1. The driving unit is composed of multiple hydraulic cylinders, and multiple oil channels need to be set up, so the structure is relatively complicated; 2. The rotating plate is hinged between the pressure plate and the hydraulic cylinder, and both the rotating plate and the pressure plate will move, so the structure is relatively complicated; 3. The rotating plate is specifically set on the inner side relative to the telescopic head, and the size of the workpiece that the lathe fixture can clamp is greatly limited. Utility Model Content

[0005] In order to overcome the problems of the existing press-fit lathe fixtures requiring multiple power sources and complicated structures, the utility model provides a turning fixture.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A turning fixture comprises a base and a plurality of first tie rods, wherein the plurality of first tie rods are telescopically connected to the base, the telescopic direction of the first tie rods being perpendicular to the front end face of the base, a pressure plate being connected to the first tie rods, and the telescopic movement of the first tie rods drives the pressure plate to rotate so as to fix the workpiece on the front end face of the base, and further comprises a transverse tie rod and a tie rod joint; the transverse tie rod is arranged parallel to the front end face of the base, and a through hole perpendicular to the front end face of the base is provided on the base for the first tie rod to pass through; the first tie rod is connected to the transverse tie rod through the through hole, and the tie rod joint is used to fix the transverse tie rod on the tie rod of the lathe.

[0008] In the present application, by adding a tie rod and a tie rod joint, the main spindle tie rod of the lathe provides power without the need for special hydraulic equipment or additional oil channels, thereby simplifying the drive structure.

[0009] In some embodiments, there are two first tie rods, which are symmetrically arranged on both sides of the center of the front end surface of the base, and the transverse tie rod is in a straight line shape, and the center of the transverse tie rod coincides with the center of the front end surface of the base.

[0010] In this embodiment, there are two first tie rods, which are symmetrically arranged to simplify the tie rod structure and balance the force.

[0011] In some embodiments, the front end surface of the base is fixedly connected to the support rod, the number of the support rods corresponds to the number of the first pull rods, the pressure plate is hinged on the support rod, and a waist-shaped groove is also provided on the pressure plate. A protrusion is connected to the first pull rod, and the protrusion is slidably connected in the waist-shaped groove. When the first pull rod is extended and retracted, the protrusion slides in the waist-shaped groove, so that the pressure plate rotates relative to the support rod.

[0012] In this embodiment, by setting a waist-shaped groove on the pressure plate, the component structure and movement logic are simplified, the movement of the support rod is avoided, the structure is simple and the number of moving parts is small, the probability of interference between the moving parts and the workpiece is reduced, and the application range of the device is improved.

[0013] In some embodiments, the outer periphery of the base is connected to the mounting plate, and the support rod is fixedly connected to the mounting plate.

[0014] In this embodiment, by providing a mounting plate, specifically, the mounting plate is provided on the outer periphery of the base, so that the installation of the support rod does not occupy the base space, and the adaptability of the device to clamping larger-sized workpieces is improved.

[0015] In some embodiments, a plurality of mounting holes are circumferentially arranged on the mounting plate for the support rod to be mounted at different positions.

[0016] In this embodiment, a plurality of mounting holes are arranged around the mounting plate, and the hinge point of the pressure plate can be changed by installing the support rod at different positions, thereby making the device adaptable to the clamping of special-shaped parts.

[0017] In some embodiments, the mounting hole is a through hole perpendicular to the front end surface of the base, and the end of the support rod away from the connection with the pressure plate can pass through the mounting hole and is provided with an external thread.

[0018] In this embodiment, the mounting hole is a through hole, and the end of the support rod away from the pressure plate can pass through the mounting hole and is provided with an external thread to achieve a detachable connection between the support rod and the mounting plate.

[0019] In some embodiments, a first pin is fixedly provided on the support rod, and the support rod and the pressure plate are hinged through the first pin; the protrusion is a second pin fixedly provided on the first pull rod, and the second pin cooperates with the waist-shaped groove of the pressure plate. When the first pull rod is extended or retracted, the pressure plate rotates under the limit of the first pin and the second pin.

[0020] In this embodiment, the support rod and the pressing plate, and the first pull rod and the pressing plate are matched by pins, so the structure is simple and the implementation is convenient.

[0021] In some embodiments, a plurality of positioning pins are disposed on the front end surface of the base, and the ends of the positioning pins away from the front end surface are arc-shaped.

[0022] In this embodiment, a positioning pin is provided on the end of the base for pre-positioning the workpiece, which facilitates automatic clamping of the pressure plate.

[0023] The utility model also provides a lathe, comprising the turning fixture described in any one of the above embodiments, wherein a tie rod and a cross tie rod of the lathe are fixedly connected via a tie rod joint.

[0024] The beneficial effects of the utility model are as follows: by adding a transverse tie rod and a tie rod joint, the main shaft tie rod of the lathe provides power without the need to set up additional hydraulic equipment and oil channels, thereby simplifying the drive structure; further, two tie rods are symmetrically arranged, taking into account both the simplification of the transverse tie rod structure and the balance of force; the pressure plate is hinged to the support rod, and a waist-shaped groove is provided on the pressure plate for active connection with the first tie rod, thereby avoiding the movement of the support rod, and the structure is simple and the number of moving parts is reduced; an installation plate is added to the periphery for installing the support rod to avoid occupying space on the chassis; the support rod is detachably connected, and different installation holes are provided on the installation plate to improve the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The overall structure of the turning fixture provided by the utility model is shown in FIG. Figure 1 ;

[0026] Figure 2 The overall structure of the turning fixture provided by the utility model is shown in FIG. Figure 2 .

[0027] Marked in the figure are, 1-pressing plate, 11-waist groove, 2-support rod, 21-first pin, 3-base, 4-mounting plate, 41-mounting hole, 5-first tie rod, 51-second pin, 6-transverse tie rod, 7-tie rod joint. DETAILED DESCRIPTION

[0028] The utility model is further described below in conjunction with the accompanying drawings.

[0029] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0030] like Figure 1-2 As shown, a turning fixture is specifically shown.

[0031] A turning fixture comprises a base 3 and a plurality of first tie rods 5, wherein the plurality of first tie rods 5 are telescopically connected to the base 3, wherein the telescopic direction of the first tie rods 5 is perpendicular to the front end face of the base 3, and a pressure plate 1 is connected to the first tie rods 5, wherein the telescopic direction of the first tie rods 5 drives the pressure plate 1 to rotate so as to fix the workpiece on the front end face of the base 3, and further comprises a transverse tie rod 6 and a tie rod joint 7; the transverse tie rod 6 is arranged parallel to the front end face of the base 3, and a through hole perpendicular to the front end face of the base 3 is provided on the base 3 for the first tie rod 5 to pass through; the first tie rod 5 is connected to the transverse tie rod 6 through the through hole, and the tie rod joint 7 is used to fix the transverse tie rod 6 on the tie rod of the lathe.

[0032] In the present application, by adding a tie rod 6 and a tie rod joint 7, the main spindle tie rod of the lathe provides power without the need for special hydraulic equipment or additional oil channels, thereby simplifying the drive structure.

[0033] It is to be noted that, in the present application, the front end face of the base 3 refers to the end face used for clamping the workpiece when the turning fixture is installed on the lathe. Figure 1 and Figure 2 In the middle, it is shown as the upper end surface.

[0034] Obviously, the turning fixture should include a mounting hole or mounting structure to be detachably connected to the lathe. In this embodiment, the through hole provided on the rear end surface of the turning fixture is used as the mounting hole. This is irrelevant to the main invention point and will not be described in detail.

[0035] In this embodiment, there are two first tie rods 5, which are symmetrically arranged on both sides of the center of the front end face of the base 3. The tie rod 6 is in a straight line shape, and the center of the tie rod 6 coincides with the center of the front end face of the base 3. This is to simplify the structure of the tie rod 6 and balance the force. Obviously, the number of first tie rods 5 can be more, and the structure of the tie rod 6 needs to be adjusted accordingly. And when the number of first tie rods 5 is two, the turning fixture includes two pressure plates 1, which can facilitate the pre-positioning and clamping of the workpiece in practice.

[0036] In this embodiment, the front end face of the base 3 is fixedly connected to the support rod 2, the number of the support rod 2 corresponds to the number of the first pull rod 5, the pressing plate 1 is hinged on the support rod 2, and a waist-shaped groove 11 is also provided on the pressing plate 1. A protrusion is connected to the first pull rod 5, and the protrusion is slidably connected in the waist-shaped groove 11. The first pull rod 5 is extended and retracted, and the protrusion slides in the waist-shaped groove 11, so that the pressing plate 1 rotates relative to the support rod 2. Compared with the technical solution of the reference cited in the background technology, the connection method of the transfer plate in its solution is more complicated, and it needs to rotate during use. By setting the waist-shaped groove 11 on the pressing plate 1, the component structure and movement logic are simplified, the movement of the support rod 2 is avoided, the structure is simple and the number of moving parts is small, the probability of interference between the moving parts and the workpiece is reduced, and the scope of application of the device is improved.

[0037] In this embodiment, the outer periphery of the base 3 is connected to the mounting plate 4, and the support rod 2 is fixedly connected to the mounting plate 4. By providing the mounting plate 4, specifically, the mounting plate 4 is provided on the outer periphery of the base 3, so that the installation of the support rod 2 does not occupy the space of the base 3, and the adaptability of the device to clamping larger-sized workpieces is improved.

[0038] In this embodiment, the mounting plate 4 is provided with a plurality of mounting holes 41 in the circumference thereof, so that the support rod 2 can be mounted at different positions. By mounting the support rod 2 at different positions, the hinge point of the pressing plate 1 can be changed, so that the device can be adapted to the clamping of special-shaped parts. Obviously, the adaptability of the device can also be improved by using different structures of the pressing plate 1.

[0039] In this embodiment, the mounting hole 41 is a through hole perpendicular to the front end surface of the base 3, and the end of the support rod 2 away from the connection with the pressing plate 1 can pass through the mounting hole 41 and is provided with an external thread, so as to realize the detachable connection between the support rod 2 and the mounting plate 4.

[0040] In this embodiment, a first pin 21 is fixedly provided on the support rod 2, and the support rod 2 and the pressing plate 1 are hinged through the first pin 21; the second pin 51 is fixedly provided on the first pull rod 5, and the second pin 51 cooperates with the waist groove 11 of the pressing plate 1. When the first pull rod 5 is extended or retracted, the pressing plate 1 rotates under the limit of the first pin 21 and the second pin 51. The support rod 2 and the pressing plate 1, and the first pull rod 5 and the pressing plate 1 are all matched through pins, so the structure is simple and the implementation is convenient.

[0041] In this embodiment, a plurality of positioning pins or positioning blocks are provided on the front end surface of the base 3 for clamping the workpiece. Figure 1 The figure shows a positioning block on the front end surface of the base 3.

[0042] In some embodiments, a plurality of positioning pins are arranged on the front end surface of the base 3, and the ends of the positioning pins away from the front end surface are in an arc shape, so as to provide pre-positioning for the workpiece and facilitate automatic clamping of the pressing plate 1.

[0043] In this embodiment, the tie rod 6 is also provided with a waist-shaped groove at the connection between the tie rod 6 and the first tie rod 5 , and a pin is correspondingly provided on the first tie rod 5 to cooperate with the groove so as to facilitate the switching or adjustment of the tooling.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A turning fixture, comprising a base (3) and a plurality of first tie rods (5), wherein the plurality of first tie rods (5) are telescopically connected to the base (3), wherein the telescopic direction of the first tie rods (5) is perpendicular to the front end surface of the base (3), and a pressing plate (1) is connected to the first tie rods (5), wherein the telescopic movement of the first tie rods (5) drives the pressing plate (1) to rotate so as to fix the workpiece on the front end surface of the base (3), wherein: It also includes a tie rod (6) and a tie rod joint (7); The horizontal tie rod (6) is arranged parallel to the front end surface of the base (3), and a through hole perpendicular to the front end surface of the base (3) is provided on the base (3) for the first tie rod (5) to pass through; The first tie rod (5) passes through the through hole and is connected to the transverse tie rod (6), and the tie rod joint (7) is used to fix the transverse tie rod (6) to the tie rod of the lathe.

2. The turning fixture according to claim 1, characterized in that: There are two first tie rods (5) symmetrically arranged on both sides of the center of the front end face of the base (3); the transverse tie rod (6) is in a straight line shape, and the center of the transverse tie rod (6) coincides with the center of the front end face of the base (3).

3. The turning fixture according to claim 1 or 2, characterized in that: The front end surface of the base (3) is fixedly connected to the support rod (2), the number of the support rods (2) corresponds to the number of the first pull rods (5), the pressure plate (1) is hinged on the support rod (2), a waist-shaped groove (11) is also provided on the pressure plate (1), a convex block is connected to the first pull rod (5), the convex block is slidably connected in the waist-shaped groove (11), the first pull rod (5) is extended and retracted, and the convex block slides in the waist-shaped groove (11), so that the pressure plate (1) rotates relative to the support rod (2).

4. The turning fixture according to claim 3, characterized in that: The outer periphery of the base (3) is connected to the mounting plate (4), and the support rod (2) is fixedly connected to the mounting plate (4).

5. The turning fixture according to claim 4, characterized in that: The mounting plate (4) is provided with a plurality of mounting holes (41) in the circumferential direction for the support rod (2) to be mounted at different positions.

6. The turning fixture according to claim 5, characterized in that: The mounting hole (41) is a through hole perpendicular to the front end surface of the base (3); the end of the support rod (2) away from the connection with the pressure plate (1) can pass through the mounting hole (41) and is provided with an external thread.

7. The turning fixture according to claim 3, characterized in that: A first pin (21) is fixedly arranged on the support rod (2), and the support rod (2) and the pressure plate (1) are hinged via the first pin (21); the protrusion is a second pin (51) fixedly arranged on the first pull rod (5), and the second pin (51) cooperates with the waist-shaped groove (11) of the pressure plate (1). When the first pull rod (5) is extended or retracted, the pressure plate (1) rotates under the limit of the first pin (21) and the second pin (51).

8. The turning fixture according to claim 1, characterized in that: A plurality of positioning pins are arranged on the front end surface of the base (3), and the ends of the positioning pins away from the front end surface are in an arc shape.

9. Lathe, characterized by: The turning fixture comprises the turning fixture as claimed in any one of claims 1 to 8, wherein the tie rod of the lathe and the tie rod (6) of the turning fixture are fixedly connected via a tie rod joint (7).

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