Bidirectional taper sleeve centering roller supporting clamp

Abstract

The utility model relates to the technical field of machining, in particular to a bidirectional taper sleeve centering pin roller supporting clamp which comprises a middle mandrel (1), a set screw (2), a left taper sleeve (3), a supporting pin roller (4), a right taper sleeve (5) and a compression nut (6). The left conical sleeve (3) is connected to the left end of the middle mandrel (1) in a sleeved mode, the right conical sleeve (5) is connected to the right end of the middle mandrel (1) in a sleeved mode, the supporting pin roller (4) is movably arranged in a hole distributed in the left conical sleeve (3) in the radial direction, an arc-shaped groove is formed in the outer circle of the middle mandrel (1), and the outer circle of the supporting pin roller (4) is matched with the arc-shaped groove. The set screw (2) is arranged in a threaded hole in the end of the left conical sleeve (3) and makes contact with a step on the outer circle of the left end of the middle mandrel (1), and the compression nut (6) is arranged at the right end of the middle mandrel (1).

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a bidirectional tapered sleeve centering roller support fixture. The utility model has strong applicability in the field of grinding external cylindrical processing of long cavity thin-walled parts. Background Art

[0002] In the field of metal machining, machining long, thin-walled parts is common. These thin-walled parts are typically positioned using internal holes. If high coaxiality and other requirements are required, a tapered mandrel is ideal for clamping and positioning. However, some workpieces have very thin outer walls, and the tapered shape of the tapered mandrel reduces the contact area with the workpiece. Furthermore, the workpiece's inherent material strength is weak, which can easily lead to deformation. Utility Model Content

[0003] Purpose of the utility model: The utility model provides a bidirectional tapered sleeve centering roller support fixture to solve the problems existing in the prior art.

[0004] Technical solution:

[0005] A bidirectional tapered sleeve centering roller support fixture, comprising: an intermediate spindle, a set screw, a left tapered sleeve, a support roller, a right tapered sleeve, and a compression nut;

[0006] The left tapered sleeve is sleeved on the left end of the intermediate spindle, and the right tapered sleeve is sleeved on the right end of the intermediate spindle. The support roller is movably arranged in a radially distributed hole on the left tapered sleeve. A circular arc groove is provided on the outer circle of the intermediate spindle, and the outer circle of the support roller matches the circular arc groove. The locking screw is arranged in the threaded hole at the end of the left tapered sleeve, and the locking screw contacts the step on the outer circle of the left end of the intermediate spindle. The clamping nut is arranged at the right end of the intermediate spindle.

[0007] Furthermore, it also includes a limiting sleeve, which is arranged on the fastening screw.

[0008] Furthermore, the circular groove on the middle spindle is parallel to the axis of the middle spindle.

[0009] Furthermore, the left tapered sleeve is arranged on the middle spindle and is matched with the middle spindle with a small gap.

[0010] Furthermore, the right conical sleeve is arranged on the middle spindle and is matched with the middle spindle with a small clearance.

[0011] Furthermore, the set screw is arranged in the threaded hole at the left end of the left tapered sleeve, and the threaded hole is eccentric relative to the axis of the middle spindle.

[0012] Beneficial Effects: The present invention relates to the technical field of machining thin-walled parts, and more specifically, to a bidirectional tapered sleeve centering roller support fixture, comprising an intermediate spindle, a set screw, a left tapered sleeve, support rollers, a right tapered sleeve, a clamping screw, and a limit sleeve. The present invention utilizes bidirectional tapered surface positioning, resulting in high centering capabilities and suitable for machining applications requiring high coaxiality and cylindricity. To ensure that the thin-walled parts being machined do not deform under the action of cutting forces, a number of support rollers are mounted on the intermediate spindle to provide support from within the thin-walled parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the fixture of the utility model;

[0014] Figure 2 for Figure 1 Section view along AA;

[0015] Figure 3 for Figure 1 Sectional view along BB;

[0016] Among them: 1 intermediate spindle, 2 set screw, 3 left tapered sleeve, 4 support roller, 5 right tapered sleeve, 6 tightening nut, 7 limit sleeve. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] The utility model provides a bidirectional tapered sleeve centering roller support fixture, which comprises: an intermediate spindle 1, a set screw 2, a left tapered sleeve 3, a support roller 4, a right tapered sleeve 5, a pressing nut 6, and a limiting sleeve 7.

[0019] Among them: an arc-shaped groove is provided on the middle spindle 1 for providing support for the support roller 4 , and the curvature of the arc-shaped groove of the middle spindle 1 should be suitable for the diameter of the support roller 4 .

[0020] The supporting rollers 4 are arranged in the arc-shaped groove of the middle spindle 1 and match the holes on the left tapered sleeve 3. They are evenly distributed to provide uniform supporting force.

[0021] The left tapered sleeve 3 is mounted on the center spindle 1. Holes are formed in the left tapered sleeve 3 for mounting support rollers 4. These holes are symmetrically distributed, with the number of holes determined based on the desired support points for the workpiece. The diameter of the support rollers 4 must be precisely aligned with the holes in the left tapered sleeve 3.

[0022] The right tapered sleeve 5 is arranged on the middle spindle 1 and clamps the workpiece together with the left tapered sleeve 3 through the clamping nut 6. There should be a certain gap between the right tapered sleeve 5 and the left tapered sleeve 3 to ensure that the right tapered sleeve 5 and the left tapered sleeve 3 do not contact when clamping the workpiece.

[0023] Among them, the design of the taper of the left tapered sleeve 3 and the right tapered sleeve 5 must take into account the length of the positioning hole of the part to be processed and must be considered comprehensively.

[0024] Among them: the left tapered sleeve 3 and the right tapered sleeve 5 must be processed in conjunction with the middle spindle 1 to ensure coaxiality after assembly. On this basis, the left tapered sleeve 3 and the right tapered sleeve 5 can play a good centering role because of the existence of the taper.

[0025] Wherein: the middle spindle 1 is provided with a platform for the set screw 2 to apply force.

[0026] Wherein: the set screw 2 is arranged in the threaded hole of the left tapered sleeve 3, and the threaded hole is eccentric.

[0027] When the set screw 2 is tightened, the center spindle 1 and the left tapered sleeve 3 rotate relative to each other, squeezing the support roller 4 out of the circular groove of the center spindle 1, pressing against the workpiece and providing support. The set screw 2 is tightened until it contacts the limit sleeve 7.

[0028] The number of supporting rollers 4 is determined by the supporting conditions of the workpiece being processed.

[0029] Among them: before tightening the set screw 2, the support roller 4 should be very close to the inner hole wall of the processed part, otherwise the "stroke" of the support roller 4 is limited and may not support the processed part.

[0030] Among them: gently twist the clamping nut 6, so that the conical surfaces of the right tapered sleeve 5 and the left tapered sleeve 3 clamp the parts to be processed, and cooperate with the set screw 2 to apply force and work together.

[0031] When in use, first insert the middle spindle 1 into the left tapered sleeve 3 so that the arc groove on the middle spindle 1 and the hole on the left tapered sleeve 3 are basically aligned.

[0032] The second step is to gently screw the set screw 2 into the threaded hole of the left tapered sleeve 3 based on the first step. Do not tighten it yet, just make light contact with it.

[0033] The third step is to place the support roller 4 into the hole on the left tapered sleeve 3. Keep the results of steps 1 and 2 in a vertical state to facilitate placing the support roller 4 into the hole on the left tapered sleeve 3.

[0034] In the fourth step, the part to be processed is installed on the left tapered sleeve 3. Although the support roller 4 and the part to be processed are not in full contact at this time, the support roller 4 has been blocked by the inner hole wall of the part to be processed. Therefore, the assembly results of steps one, two, three, and four can be placed horizontally to facilitate subsequent operations.

[0035] Step 5: Install the right tapered sleeve 5, then slowly rotate the compression nut 6. When the compression nut 6 slightly contacts the right tapered sleeve 5, tighten it simultaneously with the set screw 2. The two should work together to apply force until the part is firmly clamped. The set screw 2 only needs to be pressed until it contacts the limit sleeve 7. That is, the force applied does not need to be too large to prevent deformation or damage to the part.

[0036] The clamping force on the machined part can be adjusted by the clamping nut (6), thereby avoiding the problem of poor control of the clamping force when the part is clamped directly with the machine tool's tooling, such as the machine tool's center. Therefore, the present invention can effectively reduce the possibility of deformation of the part due to clamping.

[0037] The present invention takes a different approach by using the inner wall of the workpiece hole as an auxiliary support point and utilizing evenly distributed rollers as support, which can effectively reduce the possibility of workpiece deformation during processing.

[0038] This embodiment is only for grinding. For other processing methods and applications, the structure can be adjusted, modified, improved and improved based on the ideas and principles provided by the present invention. It is also possible to make major adjustments and modifications to the structure of the present invention while maintaining the principles of the present invention.

Claims

1. A bidirectional tapered sleeve centering roller support fixture, characterized by: include: Intermediate spindle (1), set screw (2), left tapered sleeve (3), supporting roller (4), right tapered sleeve (5), and compression nut (6); The left tapered sleeve (3) is sleeved on the left end of the intermediate shaft (1), and the right tapered sleeve (5) is sleeved on the right end of the intermediate shaft (1). The support roller (4) is movably arranged in a radially distributed hole on the left tapered sleeve (3). A circular arc groove is arranged on the outer circle of the intermediate shaft (1). The outer circle of the support roller (4) matches the circular arc groove. The locking screw (2) is arranged in a threaded hole at the end of the left tapered sleeve (3). The locking screw (2) contacts the step on the outer circle of the left end of the intermediate shaft (1). The clamping nut (6) is arranged on the right end of the intermediate shaft (1).

2. A bidirectional taper sleeve centering roller support fixture according to claim 1, characterized in that: It also includes a limiting sleeve (7), which is arranged on the set screw (2).

3. The bidirectional taper sleeve centering roller support fixture according to claim 1, characterized in that: The circular groove on the middle core shaft (1) is parallel to the axis of the middle core shaft (1).

4. The bidirectional taper sleeve centering roller support fixture according to claim 1, characterized in that: The left tapered sleeve (3) is arranged on the middle spindle (1) and is fitted with the middle spindle (1) with a small clearance.

5. The bidirectional taper sleeve centering roller support fixture according to claim 1, characterized in that: The right cone sleeve (5) is arranged on the middle spindle (1) and is matched with the middle spindle (1) with a small clearance.

6. The bidirectional taper sleeve centering roller support fixture according to claim 1, characterized in that: The set screw (2) is arranged in a threaded hole at the left end of the left tapered sleeve (3), and the threaded hole is eccentric relative to the axis of the middle spindle (1).

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