Lathe tail center tool fixture

Abstract

The utility model discloses a lathe tail center tool fixture which comprises a claw disc, a claw capable of moving centripetally is arranged on the claw disc, and the claw disc controls the movement of the claw through a driving part. The driving component comprises an ejector rod seat, a lead screw and a nut seat, the ejector rod seat is fixed on the claw disc through a bolt, the nut seat is fixed on the claw, the nut seat is connected with the ejector rod seat through the lead screw, the lead screw is in threaded connection with the nut seat, and the ejector rod seat is rotatably connected with the lead screw. According to the lathe tail center tool fixture, for parts of workpieces which have no datum planes on the outer circles and cannot be fixed through a center frame and a tailstock, the claw disc is installed in the middle, the outer circles of the workpieces are clamped through the clamping claws of the claw disc, the centers are inserted into center holes, and the tool can clamp the end faces to conduct turning according to the sizes of the workpieces. And meanwhile, concentric or eccentric workpieces can be aligned, and solid and hollow workpieces can be clamped.

Description

Technical Field

[0001] The utility model relates to the technical field of machining, in particular to a tool fixture for the tail end of a lathe. Background Art

[0002] Machining refers to the process of changing the shape, size or performance of a workpiece through a mechanical device. It can be divided into cutting and pressure processing according to the difference in processing methods.

[0003] The shapes of workpieces that need to be processed by machining cutting are different. Some workpieces have no reference surface on the outer circle, and the end face is the processing surface, which cannot be drilled and positioned. The center frame and tailstock cannot be used for positioning. The centrifugal force generated during the processing causes the tailstock to detach from the clamping, making it difficult to process. For this reason, the mechanical technology of the existing equipment is improved so that it can cooperate with the tailstock to fix the workpiece whose end face cannot be drilled and whose outer circle has no reference surface to meet the processing conditions. Utility Model Content

[0004] The utility model aims to provide a lathe tail center fixture to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A tool fixture for the tail end of a lathe, comprising a claw plate, on which a claw that can move centripetally is arranged, and the movement of the claw is controlled by a driving component on the claw plate;

[0007] The driving component includes a push rod seat, a screw rod and a nut seat. The push rod seat is fixed on the claw plate by bolts, the nut seat is fixed on the claw, the nut seat and the push rod seat are connected by a screw rod, the screw rod and the nut seat are threadedly connected, and the push rod seat and the screw rod are rotatably connected.

[0008] As a further solution of the utility model: the clamping claw includes a clamping claw part and a sliding part, a sliding groove is opened on the claw plate, the sliding part can be slidably installed in the sliding groove, the clamping claw part and the sliding part are fixed to each other, and the sliding part and the nut seat are fixed to each other.

[0009] As a further solution of the utility model: a limiting rib is arranged inside the slide groove, and grooves matching the limiting rib are opened on both sides of the sliding part. The limiting rib is located in the groove of the sliding part to limit the travel trajectory of the sliding part.

[0010] As a further solution of the utility model: the driving component and the claws are respectively located on the front and back sides of the claw plate, and the number of the driving components and the claws is not less than three.

[0011] As a further solution of the utility model: a hexagon socket head screw is arranged at the end of the screw rod.

[0012] As a further solution of the utility model: a top hole is opened on the claw disc, the top hole is on the same side as the driving component and is located at the center point of the claw disc.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The center tooling fixture at the tail of the lathe is used for some workpieces whose outer circle has no reference surface and cannot be fixed by the center frame and tailstock. A claw plate is installed in the middle, and the claws of the claw plate clamp the outer circle of the workpiece. The center is inserted into the center hole. The tooling can clamp the end face for turning according to the size of the workpiece. It can also align concentric or eccentric workpieces. Both solid and hollow workpieces can be clamped. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a lathe tail end center fixture;

[0016] Figure 2 This is a rear view of the structure of a top tooling fixture at the tail of a lathe;

[0017] Figure 3 It is a structural plan view of the center tooling fixture at the tail end of a lathe.

[0018] In the figure: 1. claw plate; 2. slide groove; 3. sliding part; 4. push rod seat; 5. screw rod; 6. nut seat; 7. hexagon socket head screw; 8. limiting rib; 9. top hole; 10. clamping claw part. DETAILED DESCRIPTION

[0019] See also Figures 1 to 3 In the embodiment of the utility model, a lathe tail center fixture includes a claw plate 1, on which a claw that can move centripetally is provided, and the claw plate 1 controls the movement of the claw through a driving component;

[0020] The driving component includes a push rod seat 4, a screw rod 5 and a nut seat 6. The push rod seat 4 is fixed to the claw plate 1 by bolts, and the nut seat 6 is fixed on the claw. The nut seat 6 and the push rod seat 4 are connected by the screw rod 5, and the screw rod 5 and the nut seat 6 are threadedly connected. The push rod seat 4 and the screw rod 5 are rotatably connected. For the workpiece whose outer circle has no reference surface, the end face is the processing surface, and the drilling positioning cannot be performed, the present application adopts the prevention of external clamping. By rotating the screw rod 5 of the driving component, the nut seat 6 drives the claw to move centripetally, and the outer side of the workpiece end face is clamped. Each driving component and the claw are independent. Therefore, through debugging, the workpiece can be clamped to be infinitely close to concentricity without damaging the end face of the workpiece and drilling. It can adapt to the processing of workpieces with various outer circle shapes and end faces.

[0021] In a preferred embodiment, the clamping jaws include a clamping jaw portion 10 and a sliding portion 3. A sliding groove 2 is provided on the claw plate 1. The sliding portion 3 can be slidably installed in the sliding groove 2. The clamping jaw portion 10 and the sliding portion 3 are fixed to each other, and the sliding portion 3 and the nut seat 6 are fixed to each other. The main function of the clamping jaw portion 10 is similar to the clamping jaw of a three-jaw chuck, which can clamp and fix the inner and outer circles of the workpiece. The main function of the sliding portion 3 is a sliding connection to make the movement of the clamping jaw portion 10 stable.

[0022] In a preferred embodiment, a limiting rib 8 is provided inside the slide groove 2, and slots matching the limiting rib 8 are provided on both sides of the sliding part 3. The limiting rib 8 is located in the slot of the sliding part 3 to limit the travel trajectory of the sliding part 3. The limiting rib 8 and the slot limit the sliding part 3 in the slide groove 2, so that the sliding part 3 slides in the slide groove 2 without leaving the slide groove 2.

[0023] In a preferred embodiment, the driving component and the claws are respectively located on the front and back sides of the claw plate 1, and the number of driving components and claws is not less than three. The structure of the driving component will affect the installation of the workpiece. Therefore, the claws and the driving component are respectively arranged on two surfaces, and do not affect each other in space. The design is reasonable and ingenious. The number of claws determines the stability of the workpiece clamping. At least three points are required for positioning the workpiece for stable clamping. For workpieces with more complex shapes, the number of claws can be appropriately increased to improve the distribution of clamping points.

[0024] In a preferred embodiment, a hexagon socket head screw 7 is provided at the end of the screw rod 5, and the hexagon socket head screw 7 can be rotated by a chuck wrench.

[0025] In a preferred embodiment, a center hole 9 is opened on the claw plate 1. The center hole 9 is on the same side as the driving component and is located at the center point of the claw plate 1. The center hole 9 matches the center of the tailstock of the machine tool. The center is inserted into the center hole 9. The claws of the claw plate 1 are adjusted to clamp the end of the workpiece. At the same time, concentric or eccentric workpieces can also be aligned. Solid or hollow workpieces can be clamped and processed.

[0026] It should be noted that the above embodiments all belong to the same utility model concept, and the description of each embodiment has its own focus. For matters that are not described in detail in some embodiments, reference can be made to the description in other embodiments.

[0027] The above-mentioned embodiments only express the implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A lathe tail center fixture, comprising a claw plate (1), the claw plate (1) being provided with claws that can move centripetally, characterized in that: The movement of the claws is controlled by a driving component on the claw plate (1); The driving component comprises a push rod seat (4), a screw rod (5) and a nut seat (6); the push rod seat (4) is fixed to the claw plate (1) by means of bolts; the nut seat (6) is fixed to the claw; the nut seat (6) and the push rod seat (4) are connected by means of the screw rod (5); the screw rod (5) and the nut seat (6) are threadedly connected; and the push rod seat (4) and the screw rod (5) are rotatably connected.

2. The lathe tail center fixture according to claim 1, characterized in that: The clamping claw comprises a clamping claw portion (10) and a sliding portion (3); a sliding groove (2) is provided on the claw plate (1); the sliding portion (3) is slidably mounted in the sliding groove (2); the clamping claw portion (10) and the sliding portion (3) are fixed to each other; and the sliding portion (3) and the nut seat (6) are fixed to each other.

3. The lathe tail center fixture according to claim 2, characterized in that: A limiting rib (8) is arranged inside the slide groove (2), and slots matching the limiting rib (8) are provided on both sides of the sliding portion (3). The limiting rib (8) is located in the slot of the sliding portion (3) to limit the travel trajectory of the sliding portion (3).

4. A lathe tail center fixture according to any one of claims 1-3, characterized in that: The driving components and the claws are respectively located on the front and back sides of the claw plate (1), and the number of the driving components and the claws is not less than three.

5. The lathe tail center fixture according to claim 4, characterized in that: A hexagon socket head screw (7) is provided at the end of the screw rod (5).

6. The lathe tail center fixture according to claim 4, characterized in that: The claw plate (1) is provided with a top hole (9), which is on the same side as the driving component and is located at the center point of the claw plate (1).

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