CN203266213U - Lathe manual spindle clamp - Google Patents

Abstract

The utility model relates to a clamp and provides a lathe manual spindle clamp which aims to solve the problems that an existing positioning clamp affects machining precision and has potential safety hazards. The lathe manual spindle clamp comprises a manual spring spindle which is composed of a cone body, an anti-rotating pin, a cone sleeve and a nut, and an elastic sleeve is arranged in the circumference direction of the cone body and the cone sleeve of the manual spring spindle. The clamp is safe, reliable, low in cost, high in machining precision and convenient and fast to operate.

Description

A manual mandrel fixture for a lathe

technical field

The utility model relates to a fixture, in particular to a mandrel positioning fixture for a lathe. the

Background technique

Lathe clamps Lathe lathes are mainly used to process inner and outer cylindrical surfaces, conical surfaces, rotary forming surfaces, threads and end planes, etc. The above-mentioned surfaces are formed by rotating around the axis of the lathe spindle. , It is often used in the processing of revolving parts with holes as the main positioning reference, such as sleeves and discs. Various mandrels or other fixtures are often designed according to the needs of processing. The positioning fixtures are generally divided into two types: one is the clamping method using two tops, such as two cones, but because the two tops often touch the parts of the workpiece Friction and wear affect the machining accuracy and require frequent maintenance or replacement, which not only affects the production efficiency but also increases the production cost; another kind of processing method adopts one clamp and one top, the chuck clamps a mandrel, and the workpiece is inserted into the outer circle of the mandrel , using the processing method of one clamp and one top. When the gap between the mandrel and the inner hole of the workpiece is too small, the processed workpiece is not easy to remove; when the gap is too large, the precision of the workpiece cannot meet the requirements and the workpiece is easy to slip, which will damage the turning tool. At the same time, the current fixture has no reliable safety device. In the processing engineering, due to the weight of the workpiece and the fixture itself, centrifugal force is generated during high-speed rotation, and the workpiece and fixture have a safety hazard of flying out. the

The Chinese patent application number 201120196171.8 discloses a spindle positioning fixture for a numerically controlled lathe . The utility model is composed of a positioning spindle, an opening pressure plate and a shoulder nut. The positioning mandrel is a stepped shaft, one end is provided with a positioning cylinder and a stud, the outer circle of the positioning cylinder is 0.01-0.02mm smaller than the inner hole of the processed part, and the other end is provided with a clamping shaft. However, the potential safety hazard that workpieces and fixtures are easy to fly out when rotating at a high speed is not solved. 

Utility model content

In order to solve the problem that the current positioning fixture affects the machining accuracy and has potential safety hazards, the utility model proposes a manual mandrel fixture for a lathe, which is safe, reliable, low in cost, high in machining accuracy, and convenient to operate. the

The utility model is realized through the following technical solutions: a manual mandrel clamp for a lathe, the manual mandrel clamp includes a manual spring mandrel, the manual spring mandrel is composed of a cone, an anti-rotation pin, a taper sleeve, and a nut, the manual spring mandrel The cone of the shaft and the circumferential direction of the taper sleeve are provided with elastic sleeves. The workpiece is positioned on the elastic sleeve and the end surface of the mandrel with the finished inner hole, and the nut is tightened to make the elastic sleeve produce uniform elastic deformation outward through the cone and the taper sleeve, and the workpiece is tightened, so as to realize the tightness of the workpiece. Position clamp. The utility model utilizes the principle of physical mechanics to design an elastic sleeve, and the elastic deformation of the elastic sleeve is small. the

Preferably, an annular groove is provided along the circumferential outer surface of the annular elastic sleeve. The annular groove makes the elastic sleeve not in contact with the inner hole of the workpiece as a whole, and the heat generated during the processing is easily dissipated, so the deformation of the workpiece is completely negligible. the

Preferably, the end of the cone that fits with the taper hole of the lathe spindle is set as a Morse taper. Morse taper is an international standard of taper used for static fit for precise positioning. Because the taper is very small, a certain torque can be transmitted by using the principle of friction, and because of the taper fit, it can be easily disassembled. Within a certain range of the same taper, the workpiece can be disassembled and assembled freely, and at the same time it will not affect the use effect during work. For example, if the taper shank drill for drilling holes needs to be disassembled for grinding during use, it will not be reinstalled after disassembly. Affects the center position of the drill. the

The central portion of the cone of the Morse taper is provided with a tie rod, and the other end of the tie rod is connected with the clamping nut through a gasket. The overall connection between the manual spring spindle fixture of the lathe and the machine tool is matched with the Morse taper, and is tightened with a tie rod. The fixture itself has high precision, stability, safety and reliability. The jig is well-selected in material, reasonable in design, low in manufacturing cost, and strong in practicability and versatility. the

The fixture of the utility model is suitable for locating the workpiece with the inner hole, and processing revolving parts such as sleeves and discs, and is mainly used to solve the problem of the difference between the machined surface (usually the outer circle) and the positioning reference (usually the inner hole) of the processed parts. Axis; can also solve the verticality between the inner hole, the outer circle and the end face, etc. the

Compared with prior art, the beneficial effect of the present invention is:

(1) The fixture can be obtained locally, with compact and reasonable structure, convenient use, fast loading and unloading of workpieces, accurate positioning, high production efficiency, and is suitable for batch and mass production;

(2) The jig has high processing precision and strong versatility. The jig itself is not easy to wear. Even if it is worn out, the elastic sleeve can be replaced, and there is no potential safety hazard.

Description of drawings

Fig. 1: structural representation of the utility model;

In the figure, 1: Clamping nut, 2: Gasket, 3: Pull rod, 4: Cone, 5: Annular groove, 6: Anti-rotation pin, 7: Elastic sleeve, 8: Taper sleeve, 9: Nut.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail. the

Example

As shown in Figure 1, a manual mandrel clamp for a lathe, the manual mandrel clamp includes a manual spring mandrel, the manual spring mandrel is composed of a cone 4, an anti-rotation pin 6, a taper sleeve 8, and a nut 9, and the cone 4 and One end of the lathe spindle taper hole fit is set to Morse taper. A tie rod 3 is provided at the center of the Morse taper cone 4 , and the other end of the tie rod 3 is connected to the clamping nut 1 through a gasket 2 . the

An annular elastic sleeve 7 is provided in the circumferential direction of the cone 4 and the taper sleeve 8 of the manual spring mandrel. An annular groove 5 is provided along the circumferential outer surface of the annular elastic sleeve 7 . the

When in use, match the Morse taper cone 4 of the manual spring mandrel fixture for the vehicle with the taper hole of the lathe spindle, and connect the clamping nut 1, gasket 2, and pull rod 3 to the fixture from the other end of the spindle taper hole, and tighten the clamp Tightening nut 1 tightens the clamp body. The workpiece is positioned on the elastic sleeve 7 and the end surface of the mandrel with the finished inner hole, and the nut 9 is tightened to make the elastic sleeve 7 produce uniform elastic deformation outward through the cone 4 and the taper sleeve 8, and the workpiece is expanded to tighten the workpiece. This realizes the positioning and clamping of the workpiece. After the workpiece is processed, the nut 9 is unclamped to take off the workpiece, and then the workpiece to be processed is tightened and the nut 9 is loaded on to get final product, and it is repeated. the

The manual mandrel fixture for the lathe of the utility model has high processing precision, and the general precision can reach 0.02-0.05mm. If the machining precision of the upper sequence inner hole itself is very high, the precision of the processed parts is still less than 0.02-0.05mm. the

Claims (4)

1. manual mandrel fixture of lathe, manually mandrel fixture comprises the Manual spring axle, the Manual spring axle is comprised of cone (4), stop pin (6), tapered sleeve (8), nut (9), it is characterized in that, be provided with annular resilient sleeve (7) along the cone (4) of Manual spring axle and the circumferencial direction of tapered sleeve (8).

2. the manual mandrel fixture of a kind of lathe according to claim 1, is characterized in that, is provided with endless groove (5) along the circumferential outer surface of annular resilient sleeve.

3. the manual mandrel fixture of a kind of lathe according to claim 1, is characterized in that, the end that cone (4) coordinates with the lathe spindle taper hole is made as Morse's taper.

4. the manual mandrel fixture of a kind of lathe according to claim 3, is characterized in that, the cone of Morse's taper (4) central part is provided with pull bar (3), and the other end of pull bar is connected with binding nut (1) by pad (2).

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