Bolt turning non-stop clamping and unloading tool

Abstract

The utility model discloses a bolt turning non-stop clamping and discharging tool which comprises a connecting sleeve (2), a plum blossom ejector pin (3) and a movable ejector pin (5). One end of the connecting sleeve (2) is embedded into an inner taper hole I of the lathe spindle (1), and the plum blossom thimble (3) is sleeved at the other end of the connecting sleeve (2); and the movable ejector pin (5) is arranged on a mandrel of a lathe tailstock (9). According to the utility model, the machine does not need to be stopped during workpiece clamping and unloading, so that the clamping time can be shortened, the labor intensity is reduced, the production efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of turning processing equipment, and in particular relates to a non-stop clamping and unloading tool for bolt turning. Background Art

[0002] At present, some manufacturers generally use a three-jaw chuck to clamp the hexagonal head of the hexagonal bolt when producing hexagonal bolts or small shafts, and then use the movable ejector of the tailstock to support the center hole of one end of the bolt for processing; although this method is widely used, it also has the following shortcomings: first, when mass-producing hexagonal bolts, the machine needs to be stopped to clamp the workpiece, which is labor-intensive; second, the machine needs to be stopped to clamp the workpiece, which is inefficient and has high processing costs. Utility Model Content

[0003] The purpose of the utility model is to provide a tool for bolt turning without stopping the machine for clamping and unloading. The utility model does not need to stop the machine when clamping workpieces and unloading, which reduces the clamping time, reduces the labor intensity of employees, improves production efficiency, and reduces production costs.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A tool for bolt turning, clamping and unloading without stopping the machine, comprising a connecting sleeve, a plum blossom ejector and a movable ejector; one end of the connecting sleeve is embedded in the inner tapered hole I of the lathe spindle, and the other end is sleeved with the plum blossom ejector; the movable ejector is installed on the core shaft of the lathe tailstock.

[0006] In the utility model, one end of the plum blossom thimble is provided with plum blossom teeth, which have the function of increasing friction and grasping the workpiece, and is a connector for the synchronous operation of the workpiece and the spindle; the movable thimble pushes the workpiece tightly, ensuring that the workpiece is closely attached to the plum blossom thimble during operation and rotates with the spindle at high speed without being thrown out.

[0007] As a further explanation of the utility model, one end of the connecting sleeve is an outer cone I, which matches the inner cone hole I of the lathe spindle; the other end of the connecting sleeve is provided with an inner cone hole II. The main function of the connecting sleeve is to transmit the spindle speed to the plum blossom thimble to ensure that the plum blossom thimble is synchronized with the spindle speed.

[0008] As a further preferred improvement of the present invention, the outer cone I of the connecting sleeve is provided with an external thread, and the inner cone hole I of the lathe spindle is provided with an internal thread, that is, the connecting sleeve and the lathe spindle can preferably be connected by threads.

[0009] As a further explanation of the utility model, one end of the plum blossom thimble is an outer cone II, which matches the inner cone hole II of the connecting sleeve; the other end of the plum blossom thimble is provided with an inner cone hole III, and the surface of the inner cone hole III is provided with plum blossom teeth. The main function of the plum blossom teeth is to grasp one end of the bolt, ensure that the bolt rotates with the main shaft, and prevent the bolt from sliding radially.

[0010] As a further preferred improvement of the utility model, the outer cone II of the plum blossom thimble is provided with an external thread, and the inner cone hole II of the connecting sleeve is provided with an internal thread, that is, the plum blossom thimble and the connecting sleeve can preferably be connected by threads.

[0011] As a further explanation of the utility model, the movable ejector includes a center and a shell; a bearing is installed between the center and the shell, and the center can rotate freely in the shell; the other end of the shell is connected to the core shaft of the lathe tailstock. The entire movable ejector moves with the axial movement of the core shaft of the lathe tailstock.

[0012] The structure of the movable ejector is further explained as follows: the movable ejector is composed of a core shaft (tip) with a cone tip, a ball bearing, a plane bearing, and an ejector housing.

[0013] As a further preferred improvement of the present invention, the movable ejector pin and the mandrel of the lathe tailstock may also be preferably connected by threaded connection.

[0014] During the operation of the tooling of the utility model, when installing the bolt, the movable ejector moves toward the spindle direction to tighten the workpiece, and the tip and the workpiece rotate with the spindle to perform turning processing; after the processing is completed, when the workpiece is removed, the movable ejector moves away from the spindle direction, loosens the workpiece, removes the workpiece, and installs another bolt at the same time. That is, in the process of clamping the workpiece, the tip of the movable ejector is aligned with the center hole of the workpiece, the workpiece is supported by the hand, and the other end of the workpiece is aligned with the inner cone tooth of the plum blossom ejector running at a low speed (program control) with the machine tool, and the movable ejector moves toward the workpiece direction to tighten the workpiece. Under the action of the gripping force (friction force) of the plum blossom tooth, the workpiece runs with the spindle, and the hand leaves the workpiece, and the spindle rotates at a high speed (program control); the turning processing starts; after the turning processing is completed, the spindle speed is reduced, the movable ejector is loosened, and the workpiece leaves the plum blossom tooth. The workpiece falls under the action of its own gravity, and the hand catches the workpiece directly below the workpiece, and another workpiece is installed at the same time, and the above process is repeated to complete the processing of batch products. The entire loading and unloading process is completed while the spindle is rotating, saving downtime and startup time and improving production efficiency.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The outer cone of the connecting sleeve of the present utility model is inserted into the inner cone hole of the headstock spindle. The connecting sleeve rotates together with the spindle. The outer cone of the plum blossom center is inserted into the inner cone hole of the connecting sleeve, and the plum blossom center rotates in the same direction as the connecting sleeve and the spindle. The movable center moves axially towards the spindle to clamp the workpiece. The workpiece is gripped by the plum blossom teeth of the plum blossom center. The workpiece rotates with the spindle. Even under the action of a strong radial turning force, the workpiece will not slide radially. When the movable center moves away from the spindle, the workpiece is loosened and unloaded, and at the same time, another workpiece is loaded. The entire loading and unloading process is completed while the spindle is running, saving the time for stopping and starting, and improving labor productivity.

[0017] 2. Each component of the present utility model can adopt a threaded connection method. The assembly and disassembly of accessories of different sizes are convenient and fast, improving the applicability and practicability of the tooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the total tooling for bolt turning.

[0019] Figure 2 It is a schematic structural diagram of the connecting sleeve in an embodiment of the present utility model.

[0020] Figure 3 It is a schematic structural diagram of the plum blossom center in an embodiment of the present utility model.

[0021] Figure 4 It is a schematic structural diagram of the movable center in an embodiment of the present utility model.

[0022] Reference numerals: 1 - lathe spindle, 2 - connecting sleeve, 201 - outer cone Ⅰ, 202 - inner cone hole Ⅱ, 3 - plum blossom center, 301 - outer cone Ⅱ, 302 - plum blossom teeth, 4 - bolt, 5 - movable center, 501 - center point, 502 - housing, 6 - carriage, 7 - turning tool, 8 - tool post, 9 - lathe tailstock. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The present utility model will be further described below with reference to the drawings. Embodiment

[0024] As Figure 1 shown, a tooling for clamping and unloading bolts without stopping during turning includes a connecting sleeve 2, a plum blossom center 3 and a movable center 5. One end of the connecting sleeve 2 is embedded in the inner cone hole Ⅰ of the lathe spindle 1, and the other end sleeves the plum blossom center 3. The movable center 5 is installed on the mandrel of the lathe tailstock 9.

[0025] This embodiment is further described. As Figure 2As shown, one end of the connecting sleeve 2 is an outer cone Ⅰ201, and the outer cone Ⅰ201 matches the inner cone hole Ⅰ of the lathe spindle 1; the other end of the connecting sleeve 2 is provided with an inner cone hole Ⅱ202.

[0026] This embodiment further illustrates that Figure 3 As shown, one end of the plum blossom thimble 3 is an outer cone II 301, and the outer cone II 301 matches the inner cone hole II 202 of the connecting sleeve 2; the other end of the plum blossom thimble 3 is provided with an inner cone hole III, and the surface of the inner cone hole III is provided with plum blossom teeth 302.

[0027] This embodiment further illustrates that Figure 4 As shown, the movable ejector 5 includes a center pin 501 and a housing 502; a bearing is installed between the center pin 501 and the housing 502, and the center pin 501 can rotate freely in the housing 502; the other end of the housing 502 is connected to the core shaft of the lathe tailstock 9.

[0028] like Figure 1 As shown, the lathe spindle 1 is in the headstock, and the inner hole at one end of the spindle is conical, matching the outer taper of the connecting sleeve; the other end of the connecting sleeve is provided with a conical inner hole, matching the outer taper of the plum blossom thimble; the plum blossom teeth of the plum blossom thimble grasp the bolt head, and the movable thimble presses against the center hole at the other end of the bolt to limit the radial and axial movement of the bolt. Start the lathe, and the bolt rotates with the lathe spindle. Start the support plate 6, and the turning tool moves axially and radially with the support plate to turn out the required bolt shape. After the turning tool is away from the bolt, loosen the movable thimble, remove the bolt, and install another bolt at the same time, and repeat the above actions.

[0029] Working principle of this embodiment: Since the inner circle of the plum blossom of the plum blossom ejector is tapered, its main functions are: 1. It plays a guiding role. 2. It increases friction. In the process of clamping the workpiece, the top of the movable ejector is aligned with the center hole of the workpiece. The employee holds the workpiece with his hand and aligns the other end of the workpiece with the inner cone tooth of the plum blossom ejector running at a low speed (program control) with the machine tool. The movable ejector moves toward the workpiece and presses the workpiece tightly. The workpiece rotates with the spindle under the action of the gripping force of the plum blossom tooth. When the workpiece runs with the spindle, the hand leaves the workpiece, and the spindle rotates at a high speed (program control). Turning begins. After the turning process is completed, the spindle speed is reduced, the movable ejector is released, the workpiece leaves the plum blossom tooth, and the workpiece falls under the action of its own gravity. When the workpiece falls, the hand catches the workpiece directly below the workpiece and installs another workpiece at the same time. The above process is repeated to complete the processing of batch products. One connection and one installation are completed in just a few seconds. The entire process is realized during the operation of the spindle. The tool is suitable for processing bolts or thin shafts with small size, light weight and large batches. The use of the tool avoids the trouble of manual loosening and clamping during the clamping process.

[0030] Obviously, the above embodiments are merely examples given to clearly illustrate the present invention and are not limitations on the implementation of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description; it is not necessary and impossible to enumerate all implementation manners here; and the obvious changes or modifications derived therefrom still fall within the protection scope of the present invention.

Claims

1. A non-stop clamping and unloading tool for bolt turning, characterized by: It comprises a connecting sleeve (2), a plum blossom ejector pin (3) and a movable ejector pin (5); one end of the connecting sleeve (2) is embedded in the inner conical hole I of the lathe spindle (1), and the other end is sleeved with the plum blossom ejector pin (3); the movable ejector pin (5) is installed on the core shaft of the lathe tailstock (9); One end of the connecting sleeve (2) is an outer cone I (201), and the outer cone I (201) matches the inner cone hole I of the lathe spindle (1); the other end of the connecting sleeve (2) is provided with an inner cone hole II (202); One end of the plum blossom thimble (3) is an outer cone II (301), and the outer cone II (301) matches the inner cone hole II (202) of the connecting sleeve (2); the other end of the plum blossom thimble (3) is provided with an inner cone hole III, and the surface of the inner cone hole III is provided with plum blossom teeth (302).

2. The non-stop clamping and unloading tool for bolt turning according to claim 1 is characterized in that: The movable ejector pin (5) comprises a top pin (501) and a housing (502); a bearing is arranged between the top pin (501) and the housing (502), and the top pin (501) can rotate freely in the housing (502); the other end of the housing (502) is connected to the core shaft of the lathe tailstock (9).

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