CN217453069U

CN217453069U - Special fixture for deep hole machining with ultra-long aperture ratio

Info

Publication number: CN217453069U
Application number: CN202221587025.2U
Authority: CN
Inventors: 刘铸; 孙自龙; 李敬伟; 赵海院
Original assignee: DEZHOU PRECION MACHINE TOOL CO LTD
Current assignee: DEZHOU PRECION MACHINE TOOL CO LTD
Priority date: 2022-06-24
Filing date: 2022-06-24
Publication date: 2022-09-20
Anticipated expiration: 2032-06-24

Abstract

The utility model belongs to the anchor clamps that machining used, specifically a deep hole machining special fixture of overlength aperture ratio, including the base that is adorned at the lathe bed admittedly, slide, support, the voussoir that is equipped with the inclined plane and the V type piece that is used for the centre gripping work piece, slide can be controlled horizontal slip and install on the base, the support is L type and its horizontal part bottom surface links firmly on the slide, the voussoir can be controlled horizontal slip and install on support horizontal part; the V-shaped block can be arranged between the inclined plane of the wedge block and the vertical part of the support in a vertically sliding mode. The clamping position of the clamp is adjustable, the workpiece does not need to be clamped for the second time, and the machining precision is improved.

Description

Special fixture for deep hole machining with ultra-long aperture ratio

Technical Field

The utility model belongs to anchor clamps that machining used specifically are a overlength aperture footpath ratio BTA special fixture.

Background

The processing precision of the deep hole with the ultra-long aperture ratio, particularly the deviation precision of the central line, is always the bottleneck of the processing precision of the deep hole with the ultra-long aperture ratio.

Taking the petroleum drill collar industry as an example, the diameter of a small hole in a hole wall is 8mm, the depth can reach 3000mm, the structure of the machine tool can ensure that the cutter bar of the cutter is enough supported and protected when the cutter is outside the workpiece during actual processing, and after the cutter bar enters the workpiece, the enough cutter bar support and protection cannot be ensured, so that the deviation is easy to occur when the processing hole is deeper due to the gravity problem and natural sagging.

The solution provided in the prior art is to adopt a cutter splitting method, also called a continuous cutter method, that is, a plurality of cutters with the same aperture and different lengths are used for segmented processing, after each section is processed, an ultrasonic thickness gauge is used for detecting the processed aperture, and when the center line is inclined, the workpiece is secondarily clamped according to data, and the thickness of the gasket is adjusted, so that a better processing effect is achieved. For example, ZK21_ E series of numerical control deep hole drilling machines (special equipment for processing deep holes with the maximum length-diameter ratio of 375 times can be processed by adopting a gun drilling method), from the technical point of view, detection needs to be carried out at regular time, and then artificial interference adjustment is carried out. The secondary clamping of the workpiece inevitably has clamping errors, and the machining precision of the deep hole with the ultra-long aperture ratio is greatly influenced.

Disclosure of Invention

In order to solve the problem, the utility model provides a special fixture of overlength aperture footpath ratio BTA, clamping position is adjustable, need not carry out the secondary clamping to the work piece, can directly carry out the position fine setting to the work piece. The utility model adopts the technical scheme as follows:

a special fixture for deep hole machining with an ultra-long aperture ratio comprises a base, a sliding plate, a support, a wedge block with an inclined plane and a V-shaped block for clamping a workpiece, wherein the base is fixedly arranged on a lathe bed; the V-shaped block can be arranged between the inclined plane of the wedge block and the vertical part of the support in a vertically sliding manner.

According to the special fixture for deep hole processing with ultra-long aperture ratio, the inclined plane of the wedge block is provided with the guide key, one side surface of the V-shaped block is obliquely provided with the sliding chute in sliding fit with the guide key, and the other corresponding side surface of the V-shaped block is arranged on the vertical part of the support through the fastening bolt; and a vertical strip hole is formed in the vertical part of the support, and the fastening bolt slides or is fastened in the strip hole.

According to the special fixture for deep hole machining with the ultra-long aperture ratio, the bottom of the wedge block is provided with the sliding hole, the nut I is fixedly arranged in the sliding hole, the head end of the screw rod I is rotatably arranged at the vertical part of the support, the tail end of the screw rod I is in threaded connection with the nut I, and the head end of the screw rod I can be screwed to rotate the screw rod I.

According to the special fixture for deep hole machining with the ultra-long aperture ratio, the nut II is fixedly arranged on the bottom surface of the sliding plate, the head end of the screw rod II is rotatably arranged on the base, and the tail end of the screw rod II is in threaded connection with the nut II. The head end of the screw rod II is connected with a reduction gearbox.

According to the special fixture for deep hole processing with the ultra-long aperture ratio, the two sides of the V-shaped groove of the V-shaped block are respectively provided with the stand column, and the horizontal pressing plate for pressing the workpiece is arranged above the stand column.

The utility model has the advantages that: the slide board slides left and right to drive the support to slide left and right, so that the effect of adjusting the left and right positions of the V-shaped block is achieved, the V-shaped block slides along the inclined plane of the wedge block to achieve the effect of adjusting the position in the vertical direction through the left and right sliding of the wedge block arranged on the support, the workpiece does not need to be detached when the tool is replaced, and the processing efficiency and the workpiece precision are greatly improved. The sliding of the sliding plate and the sliding of the wedge block are respectively through a screw nut structure, so that the position can be accurately adjusted.

Drawings

Fig. 1 is a front view schematically illustrating the present invention;

fig. 2 is a right-side schematic view of the present invention;

fig. 3 is a schematic front sectional view of the present invention.

In the figure: 1. the device comprises a base, 2 parts of a sliding plate, 3 parts of a support, 4 parts of a V-shaped block, 5 parts of a wedge block, 6 parts of a workpiece, 7 parts of a digital display ruler, 8 parts of a pressure plate, 9 parts of a fastening bolt, 10 parts of a reduction box, 11 parts of a lead screw I, 12 parts of a nut I, 13 parts of a lead screw II, 14 parts of a nut II and 15 guide keys.

Detailed Description

The technical solution of the present invention will be described in detail with reference to the accompanying drawings. "Upper", "lower", "left" and "right" are based on the upper, lower, left and right in FIG. 1.

The embodiment is a special fixture for deep hole processing with an ultra-long aperture ratio, and the special fixture comprises a base 1 fixedly arranged on a lathe bed, a sliding plate 2, a support 3, a wedge block 5 provided with an inclined plane and a V-shaped block 4 used for clamping a workpiece, wherein the sliding plate 2 is horizontally arranged on the base 1 in a left-right sliding manner, the support 3 is L-shaped, the bottom surface of the horizontal part of the support 3 is fixedly connected on the sliding plate 2, and the wedge block 5 is horizontally arranged on the horizontal part of the support 3 in a left-right sliding manner; the V-shaped block 4 can be arranged between the inclined plane of the wedge block 5 and the vertical part of the support 3 in a vertically sliding manner. Through the up-and-down sliding of the inclined plane of the wedge block 5 and the left-and-right sliding of the sliding plate 2 driving the support 3, the V-shaped block 4 can realize the fine adjustment of the up-and-down and left-and-right positions, and the processing requirement is met. As shown in fig. 1, two sides of the V-shaped groove of the V-shaped block 4 are respectively provided with an upright column, and a horizontal pressing plate 8 for pressing the workpiece 6 is installed above the upright columns.

The sliding structure of the V-shaped block 4 is as follows: as shown in fig. 3, a guide key 15 is arranged on the inclined surface of the wedge 5, a sliding groove in sliding fit with the guide key 15 is obliquely arranged on one side surface of the V-shaped block 4, and the other corresponding side surface of the V-shaped block 4 is mounted on the vertical part of the support 3 through a fastening bolt 9; as shown in fig. 2, the vertical portion of the support 3 is provided with a vertical elongated hole in which the fastening bolt 9 slides or is fastened.

Horizontal slip about voussoir 5 adopts the feed screw nut structure, specifically is: the bottom of the wedge block 5 is provided with a slide hole, a nut I12 is fixedly arranged in the slide hole, the head end of the screw rod I11 is rotatably arranged at the vertical part and the tail end of the support 3 and is in threaded connection with the nut I12, and the head end of the screw rod I11 can be screwed by tools such as a wrench to rotate the screw rod I11. The wedge 5 horizontally slides left and right, and the V-shaped block 4 on the inclined surface of the wedge realizes the adjustment of the up-and-down position. A digital display ruler 7 is further provided on the vertical portion of the support 3, and the digital display ruler 7 is aligned with the center of the V-block 4 in the up-down direction.

Horizontal slip also adopts the screw-nut structure about slide 2, specifically is: and a nut II 14 is fixedly arranged on the bottom surface of the sliding plate 2, the head end of the screw rod II 13 is rotatably arranged on the base 1, and the tail end of the screw rod II is in threaded connection with the nut II 14. The head end of the screw II 13 is connected with a reduction gearbox 10, and the screw II 13 is driven by a motor to be transmitted to the screw II 13 through the reduction gearbox 10, so that the sliding plate 2 is driven to slide left and right, and the left and right positions of the V-shaped block 4 and the workpiece 6 are adjusted. The slide plate 2 is provided with a digital display ruler 7, and the digital display ruler 7 is aligned with the center of the V-shaped block 4 in the left-right direction. The digital display ruler 7 is made of an existing product and is operated and used according to the instruction.

This anchor clamps can realize about, position fine adjustment about it under the condition that work piece 6 was not dismantled, and operating personnel carries out position control through digital display chi 7 numerical value to work piece 6 to reach better aperture central line skew precision. The center line deflection precision is controllable in the machining process. The digital display ruler 7 is adopted to set the center origin of the clamp to be coincident with the center of a main shaft of a machine tool, the working principle of the digital display ruler is to mark the relative displacement of the parts moving up and down, left and right of the clamp body, so that the numerical value can be finely adjusted up and down and left and right according to the displayed data, in the processing process, the workpiece does not need to be disassembled when the cutter is replaced every time, and data compensation is carried out according to the ultrasonic thickness gauge.

Claims

1. The utility model provides a deep hole processing special fixture of overlength aperture ratio which characterized in that: the clamping device comprises a base (1) fixedly mounted on a lathe bed, a sliding plate (2), a support (3), a wedge block (5) provided with an inclined plane and a V-shaped block (4) used for clamping a workpiece, wherein the sliding plate (2) is horizontally arranged on the base (1) in a left-right sliding manner, the support (3) is L-shaped, the bottom surface of the horizontal part of the support is fixedly connected to the sliding plate (2), and the wedge block (5) is horizontally arranged on the horizontal part of the support (3) in a left-right sliding manner; the V-shaped block (4) can be arranged between the inclined plane of the wedge block (5) and the vertical part of the support (3) in a vertically sliding manner.

2. The special fixture for deep hole machining with ultra-long aperture ratio of claim 1 is characterized in that: a guide key (15) is arranged on the inclined surface of the wedge block (5), a sliding groove in sliding fit with the guide key (15) is obliquely arranged on one side surface of the V-shaped block (4), and the other corresponding side surface of the V-shaped block (4) is arranged on the vertical part of the support (3) through a fastening bolt (9); vertical strip holes are formed in the vertical portion of the support (3), and the fastening bolts (9) slide or fasten in the strip holes.

3. The special fixture for deep hole machining with ultra-long aperture ratio of claim 1 is characterized in that: the utility model discloses a quick-witted support, including voussoir (5), the head end of lead screw I (11) rotates and establishes vertical portion, tail end spiro union nut I (12) at support (3), the head end of lead screw I (11) can be twisted so that lead screw I (11) rotate that wedge (5) bottom is equipped with the slide opening, the slide opening internal fixation is equipped with nut I (12), the head end of lead screw I (11) rotates.

4. The special fixture for deep hole machining with ultra-long aperture ratio of claim 1 is characterized in that: a nut II (14) is fixedly arranged on the bottom surface of the sliding plate (2), the head end of the screw rod II (13) is rotatably arranged on the base (1), and the tail end of the screw rod II is in threaded connection with the nut II (14);

the head end of the screw rod II (13) is connected with a reduction gearbox (10).

5. The special fixture for deep hole machining with ultra-long aperture ratio of claim 1 is characterized in that: and two sides of a V-shaped groove of the V-shaped block (4) are respectively provided with an upright post, and a horizontal pressing plate (8) for pressing a workpiece is arranged above the upright posts.