A machining jig applied to sleeve type soft material thin-walled parts

Abstract

The utility model discloses a kind of processing fixtures applied to sleeve type soft material thin-walled parts, the lower end of the sleeve type soft material thin-walled part is provided with hanging table, and the lower end surface of the sleeve type soft material thin-walled part is provided with several process thread holes;The processing fixture applied to sleeve type soft material thin-walled part includes fixed bottom plate, expansion sleeve, screwing positioning cover plate on the upper surface of fixed bottom plate, and cover plate positioning hole is set in the middle of positioning cover plate;Expansion sleeve core part is provided with conical hole, conical hole is inlayed with conical plug, lower end thread hole is set in the lower end of conical plug, and center fastening bolt is inlayed in the center bolt hole of fixed bottom plate, and the center fastening bolt is screw-connected with lower end thread hole;Fixed bottom plate is provided with several inner ring bolt holes corresponding to the process thread hole of sleeve type soft material thin-walled part, and the processing fixture applied to sleeve type soft material thin-walled part is equipped with several inner ring fixed bolts. Through the above structural design, the utility model has the advantages of novel structure design, accurate clamping positioning.

Description

Technical Field

[0001] This utility model relates to the field of jig device technology, and in particular to a processing jig for sleeve-type soft material thin-walled parts. Background Technology

[0002] For sleeve-type thin-walled parts made of soft materials, such as the inner sleeve of a pneumatic spindle, a matching machining fixture must be designed to ensure its machining accuracy.

[0003] Among them, the Chinese utility model patent with patent number ZL202021228758.8 and patent name: "An Expansion Sleeve Fixture" discloses a machining fixture for sleeve-type parts; specifically, the expansion sleeve fixture discloses the following technical solution: an expansion sleeve fixture, including a base, a tapered body, a pull rod, an expansion sleeve, and a pull shaft, wherein a first through hole is provided in the middle of the base, a second through hole is provided in the body of the tapered body, and a first conical surface is provided at the lower end of the outer surface of the tapered body; the pull rod is inserted into the second through hole, and a second conical surface that gradually tapers downward is provided at the top of the pull rod; the expansion sleeve is sleeved on the outside of the tapered body, the bottom of the expansion sleeve abuts against the first conical surface, the upper end of the inner wall of the expansion sleeve abuts against the second conical surface, and a number of expansion grooves are alternately provided at the upper and lower ends of the expansion sleeve; the pull shaft is provided at the bottom of the base, and the pull shaft passes through the first through hole and is connected to the bottom of the pull rod.

[0004] When the above-mentioned expansion sleeve fixture is used, the pull rod is moved up and down by the pull shaft to clamp or loosen the expansion sleeve. When clamping, since both ends of the expansion sleeve abut against the conical surface and both ends of the expansion sleeve are provided with expansion grooves, the expansion sleeve expands completely in the height direction due to the pushing action of the conical surface, thereby clamping the part sleeved on the outside of the expansion sleeve from top to bottom. This makes the clamping force applied by the expansion sleeve to the workpiece more uniform, making the workpiece more stable when installed on the expansion sleeve, and thus less likely to affect the machining accuracy of the part.

[0005] It should be noted that the above-mentioned expansion sleeve fixture still has the following defects: when clamping sleeve-type parts, the expansion sleeve of the above-mentioned expansion sleeve fixture expands and presses against the inner wall of the sleeve-type parts, thereby achieving radial fixation of the sleeve-type parts; however, the expansion sleeve fixture can only achieve radial fixation of sleeve-type parts, but cannot achieve axial fixation of sleeve-type parts, thus making it difficult to guarantee the axial dimension machining accuracy of sleeve-type parts. Utility Model Content

[0006] The purpose of this utility model is to provide a machining fixture for thin-walled soft material parts, such as sleeves, to address the shortcomings of the existing technology. This machining fixture for thin-walled soft material parts has a novel structural design and good clamping and positioning accuracy.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution.

[0008] A machining fixture for sleeve-type soft material thin-walled parts, wherein the lower end of the sleeve-type soft material thin-walled parts is provided with a mounting platform, and the lower end face of the sleeve-type soft material thin-walled parts is provided with a plurality of process thread holes distributed in a ring array. The machining fixture for sleeve-type soft material thin-walled parts includes a fixed base plate and an expansion sleeve; The machining fixture for sleeve-type soft material thin-walled parts also includes a positioning cover plate screwed onto the upper surface of a fixed base plate, and a vertical through-hole is provided in the middle of the positioning cover plate. The core of the expansion sleeve has a vertically penetrating tapered hole with a tapered shape. The inner diameter of the tapered hole gradually decreases from top to bottom. A tapered plug with a shape that matches the tapered hole of the expansion sleeve is embedded in the tapered hole. The lower end of the tapered plug has a downward-opening threaded hole. The fixed base plate has a central bolt hole that is vertically aligned with the lower threaded hole. A central fastening bolt that is screwed into the central bolt hole is embedded in the central bolt hole. The base plate has several inner ring bolt holes corresponding to the process thread holes of the sleeve-type soft material thin-walled parts. The machining fixture for the sleeve-type soft material thin-walled parts is equipped with several inner ring fixing bolts. When clamping and fixing the sleeve-type soft material thin-walled parts, each inner ring fixing bolt passes through the inner ring bolt hole of the base plate and is screwed into the corresponding process thread hole of the sleeve-type soft material thin-walled parts.

[0009] The positioning cover plate has a plurality of threaded holes arranged in a ring array and opening downwards on the periphery of the positioning hole of the cover plate, and the fixing base plate has a plurality of outer ring bolt holes corresponding to the threaded holes of the cover plate. The machining fixture for sleeve-type soft material thin-walled parts is equipped with several outer ring fixing bolts. Each outer ring fixing bolt passes through the outer ring bolt hole of the fixing base plate and is screwed into the corresponding cover plate thread hole.

[0010] The positioning cover plate has a positioning flange that is circular in shape and protrudes inward at the upper opening of the positioning hole of the cover plate. The positioning flange and the positioning cover plate are an integral structure.

[0011] The upper end of the conical plug has an upward-opening threaded hole. This machining fixture, used for sleeve-type soft material thin-walled parts, is also equipped with an auxiliary lifting ring that is screwed into the upper threaded hole during use.

[0012] Compared with the prior art, the present invention has the following advantages: Specifically, when clamping and fixing sleeve-type soft material thin-walled parts, the expanding sleeve radially clamps and fixes the sleeve-type soft material thin-walled parts, the positioning cover plate circumferentially positions the lower end of the sleeve-type soft material thin-walled parts through its positioning hole, and the sleeve-type soft material thin-walled parts are screwed and fixed to the fixed base plate by the inner ring fixing bolt; therefore, the processing fixture of the present invention for sleeve-type soft material thin-walled parts has the advantages of novel structural design and good clamping and positioning accuracy. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is an exploded view of the present invention.

[0016] Figure 3 This is a cross-sectional schematic diagram of the present invention.

[0017] exist Figures 1 to 3 This includes: 1-Sleeve-type thin-walled soft material parts; 11-Hanging platform; 12-Process threaded hole; 2-Fixed base plate; 21-Center bolt hole; 22-Inner ring bolt hole; 23-Outer ring bolt hole; 3-Expansion sleeve; 31-Tapered hole; 4-Positioning cover plate; 41-Cover plate positioning hole; 42-Cover plate threaded hole; 43-Positioning flange; 5-Tapered plug; 51-Lower end threaded hole; 52-Upper end threaded hole. Detailed Implementation

[0018] The present invention will now be described in conjunction with specific embodiments.

[0019] Example 1, as Figures 1 to 3 As shown, a machining fixture is used for sleeve-type soft material thin-walled parts. The lower end of the sleeve-type soft material thin-walled part 1 is provided with a mounting platform 11, and the lower end face of the sleeve-type soft material thin-walled part 1 is provided with a plurality of process thread holes 12 distributed in a ring array.

[0020] The machining fixture for sleeve-type soft material thin-walled parts includes a fixed base plate 2, an expansion sleeve 3, and a positioning cover plate 4 screwed onto the upper surface of the fixed base plate 2. The positioning cover plate 4 has a vertical through-hole 41 in the middle.

[0021] Furthermore, the core of the expansion sleeve 3 has a vertically penetrating tapered hole 31 with a tapered shape, the inner diameter of which gradually decreases from top to bottom; a tapered plug 5 with a shape that matches the tapered hole 31 of the expansion sleeve 3 is embedded in the tapered hole 31, the lower end of the tapered plug 5 has a downward-opening lower threaded hole 51, the fixed base plate 2 has a central bolt hole 21 that is vertically aligned with the lower threaded hole 51, and a central fastening bolt that is screwed into the central bolt hole 21 is embedded in the central bolt hole 21.

[0022] Furthermore, the fixed base plate 2 is provided with a number of inner ring bolt holes 22 corresponding to the process thread holes 12 of the sleeve-type soft material thin-walled parts 1. The machining fixture used for sleeve-type soft material thin-walled parts is equipped with a number of inner ring fixing bolts. When clamping and fixing the sleeve-type soft material thin-walled parts 1, each inner ring fixing bolt passes through the inner ring bolt holes 22 of the fixed base plate 2 and is screwed into the corresponding process thread holes 12 of the sleeve-type soft material thin-walled parts 1.

[0023] It should be noted that, as Figures 1 to 3 As shown, the positioning cover plate 4 has a plurality of cover plate threaded holes 42 arranged in a ring array and opening downwards on the periphery of the cover plate positioning hole 41. The fixing base plate 2 has a plurality of outer ring bolt holes 23 corresponding to the cover plate threaded holes 42. The processing fixture for sleeve-type soft material thin-walled parts is equipped with a plurality of outer ring fixing bolts. Each outer ring fixing bolt passes through the outer ring bolt hole 23 of the fixing base plate 2 and is screwed into the corresponding cover plate threaded hole 42.

[0024] The following is a detailed description of the machining fixture for thin-walled soft material parts of Embodiment 1, based on a specific usage process. The usage process includes the following steps: Step a: Fit the positioning cover plate 4 onto the mounting platform 11 of the sleeve-type soft material thin-walled part 1; Step b: Place the positioning cover plate 4 and the sleeve-type soft material thin-walled part 1 against the upper surface of the fixed base plate 2, align the outer ring bolt holes 23 of the fixed base plate 2 with the corresponding cover plate thread holes 42 of the positioning cover plate 4, and align the inner ring bolt holes 22 of the fixed base plate 2 with the corresponding process thread holes 12 of the sleeve-type soft material thin-walled part 1. Then install the inner ring fixing bolts and the outer ring fixing screws so that the positioning cover plate 4 is screwed onto the upper surface of the fixed base plate 2, and the lower end of the sleeve-type soft material thin-walled part 1 is screwed onto the upper surface of the fixed base plate 2. Step c: Insert the expansion sleeve 3 into the inner hole of the sleeve-type soft material thin-walled part 1; Step d: Insert the conical plug 5 into the conical hole 31 of the expansion sleeve 3, and then install the center fastening bolt in the center bolt hole 21 of the fixed base plate 2, so that the center fastening bolt is screwed into the lower threaded hole 51 of the conical plug 5. During this process, as the center fastening bolt is tightened continuously, the conical plug 5 moves downward relative to the expansion sleeve 3 and expands from the expansion sleeve 3, so that the expansion sleeve 3 can be evenly opened to contact the interior of the sleeve-type soft material thin-walled part 1, thereby realizing the radial fixation of the sleeve-type soft material thin-walled part 1. At this time, the sleeve-type soft material thin-walled part 1 is clamped and fixed. Step d: After the sleeve-type soft material thin-walled part 1 is processed, unscrew the center fastening bolt and make the center fastening bolt retract from the lower end threaded hole 51 of the conical plug 5, and then pull out the conical plug 5 with the expansion sleeve 3 facing upward. Step e: After the conical plug 5 is pulled out, unscrew the inner ring fixing bolts and the outer ring fixing bolts, and finally remove the processed sleeve-type soft material thin-walled part 1.

[0025] It should be emphasized that when using the machining fixture of this embodiment to clamp and fix the sleeve-type soft material thin-walled part 1, the expansion sleeve 3, which expands, radially clamps and fixes the sleeve-type soft material thin-walled part 1. The positioning cover plate 4 circumferentially positions the lower end of the sleeve-type soft material thin-walled part 1 through its cover plate positioning hole 41. The sleeve-type soft material thin-walled part 1 is screwed and fixed to the fixing base plate 2 by the inner ring fixing bolt. That is, this embodiment can effectively clamp and fix the lower end of the sleeve-type soft material thin-walled part 1 to achieve axial fixation of the sleeve-type soft material thin-walled part 1, so as to ensure the axial dimension machining accuracy of the sleeve-type part.

[0026] In summary, the machining fixture for sleeve-type soft material thin-walled parts according to the above structural design has the advantages of novel structural design and good clamping and positioning accuracy.

[0027] Example 2, as Figure 3 As shown, the difference between this embodiment 2 and embodiment 1 is that: the positioning cover plate 4 is provided with a positioning flange 43 that is circular in shape and protrudes inward at the upper opening of the positioning hole 41 of the cover plate, and the positioning flange 43 and the positioning cover plate 4 are an integral structure.

[0028] When the positioning cover plate 4 is screwed and fastened to the upper surface of the fixed base plate 2 by the outer ring fixing bolts, the positioning flange 43 abuts against the upper surface of the mounting platform 11 of the sleeve-type soft material thin-walled part 1, that is, the positioning flange 43 can further perform axial positioning of the sleeve-type soft material thin-walled part 1.

[0029] Example 3, as Figures 1 to 3As shown, the difference between this embodiment 3 and embodiment 1 is that: the upper end of the conical plug 5 is provided with an upward-opening upper threaded hole 52; the processing fixture for sleeve-type soft material thin-walled parts is also equipped with an auxiliary lifting ring that is screwed into the upper threaded hole 52 during use.

[0030] When pulling the conical plug 5 out of the expansion sleeve 3, first screw the auxiliary lifting eye into the upper threaded hole 52 of the conical sleeve, and then pull out the conical plug 5 through the auxiliary lifting eye.

[0031] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A machining fixture for sleeve-type soft material thin-walled parts, wherein the lower end of the sleeve-type soft material thin-walled part (1) is provided with a mounting platform (11), and the lower end face of the sleeve-type soft material thin-walled part (1) is provided with a plurality of process thread holes (12) arranged in a ring array. The machining fixture for sleeve-type soft material thin-walled parts includes a fixed base plate (2) and an expansion sleeve (3). Its features are: The machining fixture for sleeve-type soft material thin-walled parts also includes a positioning cover plate (4) screwed onto the upper surface of the fixed base plate (2), and a vertical through-hole (41) is provided in the middle of the positioning cover plate (4). The core of the expansion sleeve (3) has a vertically penetrating tapered hole (31) in the shape of a cone. The inner diameter of the tapered hole (31) gradually decreases from top to bottom. A tapered plug (5) with a shape that matches the tapered hole (31) of the expansion sleeve (3) is installed in the tapered hole (31). The lower end of the tapered plug (5) has a downward-opening lower threaded hole (51). The fixed base plate (2) has a central bolt hole (21) that is vertically aligned with the lower threaded hole (51). A central fastening bolt that is screwed into the central bolt hole (21) is installed in the central bolt hole (21). The base plate (2) has several inner ring bolt holes (22) corresponding to the process thread holes (12) of the sleeve-type soft material thin-walled parts (1). The processing fixture for the sleeve-type soft material thin-walled parts is equipped with several inner ring fixing bolts. When clamping and fixing the sleeve-type soft material thin-walled parts (1), each inner ring fixing bolt passes through the inner ring bolt holes (22) of the base plate (2) and is screwed to the corresponding process thread holes (12) of the sleeve-type soft material thin-walled parts (1).

2. The machining fixture for thin-walled soft material parts according to claim 1, characterized in that: The positioning cover plate (4) has a plurality of cover plate threaded holes (42) arranged in a ring array and opening downwards on the periphery of the cover plate positioning hole (41), and the fixing base plate (2) has a plurality of outer ring bolt holes (23) corresponding to the cover plate threaded holes (42). The machining fixture for sleeve-type soft material thin-walled parts is equipped with several outer ring fixing bolts. Each outer ring fixing bolt passes through the outer ring bolt hole (23) of the fixed base plate (2) and is screwed into the corresponding cover plate thread hole (42).

3. The machining fixture for thin-walled soft material parts according to claim 1, characterized in that: The positioning cover plate (4) has a positioning flange (43) that is circular in shape and protrudes inward at the upper opening of the positioning hole (41) of the cover plate. The positioning flange (43) and the positioning cover plate (4) are an integral structure.

4. A machining fixture for thin-walled soft material parts according to claim 1, characterized in that: The upper end of the conical plug (5) is provided with an upward-opening upper threaded hole (52). The machining fixture for sleeve-type soft material thin-walled parts is also equipped with an auxiliary lifting ring that is screwed into the upper threaded hole (52) during use.

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