Internal thread workpiece clamping mechanism

Abstract

This utility model discloses a clamping mechanism for internally threaded workpieces, including a base plate, a double-ended connecting bolt, a fixing bolt, and a clamping screw. The base plate has at least one threaded blind hole; the bottom of the threaded blind hole has a threaded through hole; the fixing end of the double-ended connecting bolt connects to the threaded blind hole of the base plate, and the fixing end has a first internal threaded hole; the clamping end of the double-ended connecting bolt has a second external thread that matches the internal thread of the internally threaded workpiece, and the clamping end has a second internal threaded hole; the fixing bolt passes through the threaded through hole of the base plate and extends into the first internal threaded hole of the double-ended connecting bolt; the clamping screw passes through the bottom through hole of the internally threaded workpiece and extends into the second internal threaded hole of the double-ended connecting bolt. This utility model can clamp workpieces with internal threads that require machining of their outer contour. This utility model does not suffer from problems such as high requirements for the thread accuracy of the clamped workpiece, time-consuming clamping and disassembly, and high cost.

Description

Technical Field

[0001] This utility model relates to a machining auxiliary equipment, specifically to a clamping mechanism for internal threaded workpieces. Background Technology

[0002] In the machining industry, situations frequently require thread clamping. However, the thread threads are easily damaged during clamping. Furthermore, thread repair is difficult, and re-clamping often results in the thread being scrapped. Existing thread clamping methods include threaded mandrel clamping, elastic expansion sleeve mandrel clamping, and threaded rivet clamping. Threaded mandrel clamping offers high precision and stability, but requires high precision in thread fit, and clamping and disassembly are relatively time-consuming. Changing the mandrel may also require replacing it when replacing parts of different specifications. Elastic expansion sleeve mandrel clamping cannot provide sufficient tension force without damaging the thread threads, especially when cutting the outer contour of a workpiece with full cutting edge; the workpiece rotates with the tool, resulting in direct scrap. Elastic expansion sleeve mandrel clamping with external threads on the expansion sleeve offers higher precision and can meet the tension force requirements, but the manufacturing process of the expansion sleeve is relatively complex and costly, and it is only applicable to a limited range of internal thread specifications. The characteristics of threaded rivet clamping are speed and high positioning accuracy, which can realize automated clamping. However, there are few clamping stations, high requirements for internal thread fit accuracy, and the machining center needs to have a corresponding broaching mechanism.

[0003] Currently, there is a lack of low-cost thread clamping fixtures that can accommodate parts of various specifications. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a clamping mechanism for internal threaded workpieces, which can stably and efficiently clamp internal threaded workpieces in batch processing.

[0005] To solve the above-mentioned technical problems, the technical solution of the internal thread workpiece clamping mechanism of this utility model is as follows:

[0006] The assembly includes a base plate 5, a double-ended connecting bolt 4, a fixing bolt 6, and a clamping screw 3. The base plate 5 has at least one threaded blind hole; the bottom of the threaded blind hole has a threaded through hole; the fixing end of the double-ended connecting bolt 4 is connected to the threaded blind hole of the base plate 5, and the fixing end of the double-ended connecting bolt 4 has a first internal threaded hole 4-1; the clamping end of the double-ended connecting bolt 4 has a second external thread 4-4 that matches the internal thread of the internally threaded workpiece, and the clamping end of the double-ended connecting bolt 4 has a second internal threaded hole 4-2; the fixing bolt 6 passes through the threaded through hole of the base plate 5 and extends into the first internal threaded hole 4-1 of the double-ended connecting bolt 4; the clamping screw 3 passes through the bottom through hole of the internally threaded workpiece and extends into the second internal threaded hole 4-2 of the double-ended connecting bolt 4.

[0007] In another embodiment, a washer 2 is provided between the nut of the clamping screw 3 and the base plate of the internally threaded workpiece.

[0008] In another embodiment, the base plate 5 has at least two through holes 5-1.

[0009] In another embodiment, the bottom surface of the base plate 5 is provided with a clearance groove 5-2.

[0010] In another embodiment, the internal thread of the threaded blind hole matches the first external thread 4-3 of the fixed end of the double-ended connecting bolt 4.

[0011] In another embodiment, the first internal threaded hole 4-1 is matched with the fixing screw 6.

[0012] In another embodiment, the second internal threaded hole 4-2 is matched with the clamping screw 3.

[0013] The technical effects that this utility model can achieve are:

[0014] This invention can clamp workpieces with internal threads that require machining of their outer contours. This invention avoids the problems of high thread accuracy requirements for clamping workpieces, and the time-consuming and costly clamping and disassembly processes.

[0015] This invention can avoid damaging the internal threads during clamping, thus preventing the parts from becoming unusable.

[0016] This utility model of combined thread clamping fixture offers high clamping flexibility, can adapt to various specifications of parts, has low fixture cost, and successfully avoids the above-mentioned problems such as high thread accuracy requirements and single clamping station. Attached Figure Description

[0017] Those skilled in the art will understand that the following description is merely illustrative of the principles of this invention, and these principles can be applied in various ways to achieve many different alternative implementations. These descriptions are only intended to illustrate the general principles of the teachings of this invention and are not intended to limit the inventive concept disclosed herein.

[0018] Embodiments of the present invention are illustrated in conjunction with the accompanying drawings, which are incorporated in and form part of this specification, and together with the foregoing general description and the following detailed description of the drawings, serve to explain the principles of the present invention.

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0020] Figure 1 This is a schematic diagram of the internal thread workpiece clamping mechanism of this utility model;

[0021] Figure 2 yes Figure 1 A schematic diagram of the AA cross-section.

[0022] Explanation of the reference numerals in the figure:

[0023] 1 is the workpiece, 2 is the gasket.

[0024] 3 is a clamping screw, and 4 is a double-ended connecting bolt.

[0025] 5 is the base plate, 6 is the fixing screw.

[0026] 4-1 is the first internal threaded hole, and 4-2 is the second internal threaded hole.

[0027] 4-3 is the first external thread, and 4-4 is the second external thread.

[0028] 5-1 is a through hole, and 5-2 is a clearance groove. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art to which this utility model pertains. The terms "first," "second," and similar words used herein do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Words such as "comprising" mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, but does not exclude other elements or objects. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0030] like Figure 1 , Figure 2 As shown, the present invention relates to an internal thread workpiece clamping mechanism for clamping internal thread workpieces. The internal thread workpiece has internal threads, and its base plate has a through hole. The internal thread workpiece clamping mechanism includes a base plate 5, on which at least one threaded blind hole is provided. Figure 1 (As shown in the image, there are four threaded blind holes). The bottom of each threaded blind hole has a threaded through hole for inserting a fixing bolt 6.

[0031] The internal thread of the blind threaded hole matches the first external thread 4-3 of the fixed end of the double-ended connecting bolt 4; the base plate 5 is connected to the fixed end of the double-ended connecting bolt 4 through the blind threaded hole; the fixed end of the double-ended connecting bolt 4 has a first internal threaded hole 4-1, which matches the fixing screw 6, and the fixed end of the double-ended connecting bolt 4 is connected to the fixing bolt 6 through the internal thread; the fixing screw 6 can prevent the threads of the double-ended connecting bolt 4 from loosening during processing;

[0032] The clamping end of the double-ended connecting bolt 4 has a second external thread 4-4 that matches the internal thread of the workpiece 1, and the clamping end of the double-ended connecting bolt 4 is connected to the workpiece 1 through the external thread;

[0033] The clamping end of the double-ended connecting bolt 4 is provided with a second internal thread hole 4-2, which matches the clamping screw 3. The clamping end of the double-ended connecting bolt 4 is connected to the clamping screw 3 through the internal thread.

[0034] The clamping screw 3 passes through the bottom plate through hole of the workpiece 1 and is connected to the double-ended connecting bolt 4, thereby clamping and positioning the workpiece 1 at the clamping end of the double-ended connecting bolt 4 to prevent slippage.

[0035] Preferably, a washer 2 is provided between the nut of the clamping screw 3 and the base plate of the workpiece 1.

[0036] Furthermore, at least two through holes 5-1 are provided on the base plate 5 for fixing and connecting the machine tool worktable;

[0037] The bottom surface of the base plate 5 has a recessed groove 5-2 for accommodating the nuts of the fixing screws 6.

[0038] This invention can clamp internally threaded workpieces to facilitate machining of the outer contour surface of the workpiece without damaging the threads during machining.

[0039] The installation method of this utility model is as follows:

[0040] The first step is to install four double-headed connecting bolts 4 on the base plate 5;

[0041] The second step is to install four fixing screws 6 to secure the double-headed connecting bolts 4.

[0042] The third step is to fix the base plate 5 to the machine tool worktable by passing the bolts through the three through holes 5-1 on the base plate 5.

[0043] The method of using this utility model is as follows:

[0044] The first step is to install the four workpieces 1 onto the double-ended connecting bolts 4 respectively;

[0045] The second step is to place pad 2;

[0046] Third step, tighten the clamping screw 3;

[0047] The fourth step is to machine the outer cylindrical surface of workpiece 1.

[0048] Depending on the specifications of the internal thread of the workpiece 1 to be processed, different specifications of double-ended connecting bolts 4 can be replaced. The first external thread 4-3 and the first internal thread hole 4-1 of the double-ended connecting bolt 4 remain unchanged and are respectively connected to the base plate 5 and the fixing screw 6. The clamping screw 3 needs to be determined according to different workpieces 1.

[0049] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A clamping mechanism for internally threaded workpieces, characterized in that, include: The base plate has at least one threaded blind hole; A threaded through hole is provided at the bottom of the threaded blind hole; The double-ended connecting bolt has a fixed end connected to the threaded blind hole of the base plate, and the fixed end of the double-ended connecting bolt has a first internal thread hole; its clamping end has a second external thread that matches the internal thread of the internal thread workpiece, and the clamping end of the double-ended connecting bolt has a second internal thread hole. A fixing bolt passes through a threaded through hole in the base plate and extends into the first internal threaded hole of the double-ended connecting bolt; and The clamping screw passes through the bottom plate through hole of the internally threaded workpiece and extends into the second internally threaded hole of the double-ended connecting bolt.

2. The internal thread workpiece clamping mechanism according to claim 1, characterized in that, A washer is provided between the nut of the clamping screw and the base plate of the internally threaded workpiece.

3. The internal thread workpiece clamping mechanism according to claim 1, characterized in that, The base plate has at least two through holes.

4. The internal thread workpiece clamping mechanism according to claim 1, characterized in that, The bottom surface of the base plate is provided with a clearance groove.

5. The internal thread workpiece clamping mechanism according to claim 1, characterized in that, The internal thread of the threaded blind hole matches the first external thread of the fixed end of the double-ended connecting bolt.

6. The internal thread workpiece clamping mechanism according to claim 1, characterized in that, The first internal threaded hole matches the fixing screw.

7. The internal thread workpiece clamping mechanism according to claim 1, characterized in that, The second internal threaded hole matches the clamping screw.

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