阅读说明：本技术 一种顶紧式车削夹具 (Tight formula turning anchor clamps in top ) 是由 段瑞斐 薛虎 许亮 莫战海 朱阳 李国萍 刘浩 王创奇 于 2021-09-29 设计创作，主要内容包括：本发明提供的一种顶紧式车削夹具,包括定位件和膨胀机构,将待加工零件得内孔套设在定位件上,然后通过膨胀机构对定位件时间压力,使定位件变形产生张紧力,通过张紧力使定位件变形进而直径变大,当定位件的直径变大则对待加工零件的内孔形成定位,同时使其与加工设备的加工轴保持同轴,实现待加工零件的定位和固定,该夹具结构简单,操作便捷,提高了非标零件车削时的装夹效率。(The invention provides a jacking type turning clamp which comprises a positioning piece and an expansion mechanism, wherein an inner hole of a part to be machined is sleeved on the positioning piece, the positioning piece is deformed to generate a tensioning force through the time pressure of the expansion mechanism on the positioning piece, the positioning piece is deformed through the tensioning force so as to increase the diameter, when the diameter of the positioning piece is increased, the inner hole of the part to be machined is positioned, and meanwhile, the positioning piece is coaxial with a machining shaft of machining equipment, so that the positioning and fixing of the part to be machined are realized.)

1. The utility model provides a top compact form turning anchor clamps, its characterized in that, includes setting element (1), the one end of setting element (1) is used for being connected with processing equipment, and the other end cup joints with the hole of waiting to process the part, and the other end of setting element is provided with expansion mechanism, expansion mechanism is used for applying tensile force to the setting element, makes the setting element coaxial and fixed with waiting to process the part.

2. A push-up turning fixture according to claim 1, wherein the positioning member (1) is a hollow cylinder having an outer diameter smaller than the inner bore of the part to be machined.

3. A push-up turning fixture according to claim 1, wherein the expansion mechanism is an expansion slot (3) and a locking member (4);

the expansion joint is arranged on the outer wall of the positioning piece along the axial direction of the positioning piece, and the expansion joint radially penetrates through the outer wall;

the locking piece (4) is used for being connected with the expansion mechanism and applying pressure to the expansion mechanism to enable the expansion joint to deform to generate tension.

4. The tightening type turning clamp as claimed in claim 3, wherein the number of the expansion slots is multiple, and the expansion slots are evenly distributed on the positioning clamp circumferentially.

5. A push-up turning fixture as claimed in claim 3, wherein the positioning member is centrally provided with an attachment hole, the end of the attachment hole is provided with a slant, and the locking member (4) is attached to the attachment hole and applies pressure to the slant.

6. The tightening type turning clamp according to claim 5, wherein the connecting hole is a threaded hole, and the inclined surface is located at the mouth of the threaded hole.

7. A push-up turning fixture according to claim 5, wherein the locking member (4) is an expansion nut provided with a guiding surface cooperating with the inclined surface.

8. The tightening type turning fixture according to claim 7, wherein the slope of the inclined surface is single 10 degrees, and the slope of the guiding surface on the nut is single 20 degrees.

9. A push-up turning holder according to claim 3, wherein the locking member (4) is a point.

10. The tightening turning fixture of claim 1, wherein the end of the positioning member is provided with a fixing member coaxial therewith, and the fixing member is connected with a processing device.

Technical Field

The invention relates to the field of clamp design, in particular to a jacking type turning clamp.

Background

In the field of equipment manufacturing, some special structural part exists, and referring to fig. 1 and 2, the part cannot be clamped and positioned by a universal three-jaw or special lathe fixture due to structural limitation, so how to ensure reliable clamping is a difficulty in the processing process of the part.

The part is special in structure, and the part cannot be clamped by a universal three-jaw and a special lathe fixture due to the appearance structural characteristics of the part. However, the diameter of the small hole between phi 5 and phi 30 on the part is small, the rigidity of the back-support type soft claw is difficult to meet the processing requirement, the risk of throwing or loosening the part exists in the processing process, the part is scrapped if the part is not used, and the personal safety of an operator is greatly threatened if the part is not used.

Therefore, when the parts are machined, the defects that the parts are not easy to align, the machining quality is poor and the efficiency is low exist, and a clamp is necessary to be designed for the parts so as to improve the machining efficiency of the parts.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a jacking type turning clamp which can quickly position and clamp a part, improve the machining efficiency and ensure the machining precision.

The invention is realized by the following technical scheme:

the utility model provides a top compact form turning anchor clamps, includes the setting element, the one end of setting element is used for being connected with processing equipment, and the other end cup joints with the hole of waiting to process the part, and the other end of setting element is provided with expansion mechanism, expansion mechanism is used for applying the tensile force to the setting element, makes the setting element coaxial and fixed with waiting to process the part.

Preferably, the positioning piece is a hollow cylinder, and the outer diameter of the positioning piece is smaller than the inner hole of the part to be processed.

Preferably, the expansion mechanism is an expansion slot and a locking piece;

the expansion joint is arranged on the outer wall of the positioning piece along the axial direction of the positioning piece, and the expansion joint radially penetrates through the outer wall;

the locking piece is used for being connected with the expansion mechanism and applying pressure to the expansion mechanism to enable the expansion joint to deform to generate tension.

Preferably, the number of the expansion gaps is multiple, and the expansion gaps are evenly distributed on the positioning clamp in the circumference.

Preferably, the center of the end part of the positioning part is provided with a connecting hole, the end part of the connecting hole is provided with an inclined plane, and the locking part is connected with the connecting hole and applies pressure to the inclined plane.

Preferably, the connecting hole is a threaded hole, and the inclined plane is located at the mouth of the threaded hole.

Preferably, the locking member is an expansion nut, and the nut is provided with a guide surface matched with the inclined surface.

Preferably, the inclination of the inclined surface is single 10 degrees, and the inclination of the guiding surface on the nut is single 20 degrees.

Preferably, the locking member is a tip.

Preferably, the end part of the positioning piece is provided with a fixing piece coaxial with the positioning piece, and the fixing piece is connected with the processing equipment.

Compared with the prior art, the invention has the following beneficial technical effects:

the invention provides a jacking type turning clamp which comprises a positioning piece and an expansion mechanism, wherein an inner hole of a part to be machined is sleeved on the positioning piece, then pressure is applied to the positioning piece through the expansion mechanism, the positioning piece is deformed to generate tension, the positioning piece is deformed through the tension so as to increase the diameter, when the diameter of the positioning piece is increased, the inner hole of the part to be machined is positioned, and meanwhile, the positioning piece is coaxial with a machining shaft of machining equipment, so that the positioning and fixing of the part to be machined are realized.

Drawings

FIG. 1 is a front view of a part A to be machined;

FIG. 2 is a side view of a part A to be machined;

FIG. 3 is a cross-sectional view of a part A to be machined;

FIG. 4 is a front view of a part B to be machined;

FIG. 5 is a cross-sectional view of a part B to be machined;

FIG. 6 is a schematic view of a positioning member according to the present invention;

FIG. 7 is a front view of a positioning member of the present invention;

FIG. 8 is a front view of the locking retainer of the present invention;

FIG. 9 is a side view of the locking fastener of the present invention.

In the figure: 1. a positioning member; 2. a fixing member; 3. expanding the seam; 4. and a locking member.

Detailed Description

The present invention will now be described in further detail with reference to the attached drawings, which are illustrative, but not limiting, of the present invention.

Referring to fig. 1 to 9, the parts a and B to be machined according to the present invention have similar structures, and include a hollow cylinder, and a face plate having a certain thickness and provided with at least one end portion of the cylinder, the face plate having an irregular shape, and the portion to be machined being a side wall or/and an end surface of the cylinder.

For example, in fig. 1 to 3, a face plate is arranged at one end of a cylinder of a part a to be machined, the face plate is diamond-shaped and has a certain radian, and a surface a to be machined is a side wall, an end face and an annular groove at a joint with the face plate of the cylinder.

Referring to fig. 4 and 5, the two ends of the cylinder of the part B to be machined are both provided with panels, the panels are integrally triangular, the two triangular panels are arranged in a rotating and staggered manner, the surface a to be machined is the outer surface of the cylinder, the annular grooves on the outer surface, and the two surfaces opposite to the two panels, and the side wall of the cylinder and the panels are both related to the machining area, so that the part B to be machined is not suitable for clamping during turning.

Referring to fig. 6-8, the invention relates to a top-tightening turning fixture for parts of the type described above, comprising a positioning member 1 and a fixing member 2.

One end of the positioning piece 1 is connected with the processing equipment through a fixing piece, the other end of the positioning piece is provided with an expansion mechanism, the expansion mechanism is used for being connected with an inner hole of a part to be processed, the part to be processed is fixed, and a cylinder of the part to be processed is coaxial with a processing shaft of the processing equipment.

The locating piece 1 is a hollow cylinder, the outer diameter of the locating piece is slightly smaller than an inner hole of a part to be machined, the locating piece is inserted into the inner hole of the part to be machined, the locating piece is coaxial with the part to be machined through the expansion mechanism, turning of a surface a to be machined is carried out, the part to be machined is located through the locating piece, the problem that the surface a to be machined is shielded and cannot be machined due to direct clamping is avoided, and clamping efficiency is improved.

The positioning piece is in clearance fit with the inner hole of the part to be processed, and the clearance is 0.05-0.1 mm.

The expansion mechanism comprises an expansion gap 3 and a locking piece 4, the expansion gap is arranged on the outer wall of the positioning piece along the axial direction of the positioning piece, and the expansion gap radially penetrates through the outer wall. The number of the expansion joints is multiple, the expansion joints are evenly distributed on the positioning clamp circumferentially, and preferably 2-6 expansion joints are arranged.

The width of the expansion gap is 0.1-0.2 mm.

Retaining member 4 is used for being connected with expansion mechanism, exerts pressure to expansion mechanism and makes expansion joint deformation produce tension, and under the effect of tension, the part location is treated to the setting element diameter grow to coaxial with the setting element, the realization is treated the location and the fixing of processing the part.

The locking piece 4 is an expansion nut, a screw hole is formed in the center of the positioning piece, an inclined plane is arranged at the end of the screw hole, a guide surface matched with the inclined plane is arranged on the nut, and when the expansion nut is assembled in the screw hole, the guide surface applies pressure to the inclined plane to enable the expansion gap to be opened.

The inclination of the inclined plane is single-sided at 10 degrees, and the inclination of the upper guide surface of the nut is single-sided at 20 degrees.

In another embodiment, the locking part 4 is a tip of a lathe, and the tip applies pressure to the screw hole to open the expansion gap, so that the coaxial positioning of the positioning part and the part to be processed is realized.

According to the structural characteristics of the part to be processed, the jacking method adopts a lathe center jacking type and a bolt jacking type, wherein the movement space of a center jacking type cutter is smaller, but when a part with longer length is processed, enough rigidity can be obtained due to the jacking effect, so that the method is suitable for the part with longer length and unprocessed end face. The bolt tightening type cutter is large in movement space, can finish machining of end face parts, is not suitable for parts with longer length and size, and enables a positioning excircle to be slightly deformed by means of a deformation groove when a tip or a tightening bolt is tightened, so that the part to be machined is tightened.

The tip of setting element is provided with rather than coaxial mounting 2, is connected with processing equipment through mounting 2, in order to guarantee the axiality, fixed part and setting element one shot forming to obtain the higher axiality of the two, thereby reduce part clamping error.

Example 1

Taking a part A to be processed as an example, in actual operation, firstly, the fixing part is clamped in a soft claw of a lathe spindle, the excircle of the positioning piece is jumped to be within 0.02, the part is sleeved, the locking block 4 is screwed, the 40-degree guide surface on the bolt applies pressure to the inclined surface of the positioning piece 20, and the deformation of the expansion gap is utilized to ensure that the positioning piece A is clamped in the soft claw of the lathe spindle, the part is screwed, the inclined surface of the positioning piece is pressed by the 40-degree guide surface on the bolt, and the expansion gap is deformed The outer diameter of the core rod is expanded to tightly support the part to be processed, and the tightening force of the core rod can be adjusted through the screwing depth of the locking block thread.

The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.