CN211387992U

CN211387992U - Device for testing broaching force in broaching machining

Info

Publication number: CN211387992U
Application number: CN201921751381.1U
Authority: CN
Inventors: 孙周; 陈思雨; 唐进元; 陈雪林
Original assignee: Central South University
Current assignee: Central South University
Priority date: 2019-10-17
Filing date: 2019-10-17
Publication date: 2020-09-01
Anticipated expiration: 2029-10-17

Abstract

The utility model discloses a device that is arranged in broaching to test broaching power, including base, anchor clamps and detection mechanism, the anchor clamps centre gripping has the work piece, and detection device includes pressure sensor, and pressure sensor sets up between base and anchor clamps to when being used for the work piece by the broaching, pressure sensor detects the broaching power that the work piece received. According to the utility model discloses a device for testing broaching force in broaching processing, simple structure not only, convenient operation, the broaching force rate of accuracy that tests moreover is high.

Description

Device for testing broaching force in broaching machining

Technical Field

The utility model belongs to the technical field of the machining equipment, concretely relates to a device that is arranged in broaching to test broaching power.

Background

Broaching is a type of machining operation, and is a cutting process in which a broaching machine (broach) is used to machine various inner and outer formed surfaces. The broaching machining is a special machining process, and has the advantages of high machining precision and high efficiency in machining a plurality of parts with the same structure in a large scale.

The broaching force is accurately determined, and the broaching machine or the broaching tool can be controlled to work under the optimal power and cutting conditions, so that the foundation is provided for improving the working quality. The existing technology for testing the broaching force mainly comprises the steps of sticking a strain gauge on a broach and testing the broaching force by testing the strain of the broach, but the existing technology has a limit condition that a workpiece moves and the broach is fixed, so that the structure is complex and the operation is troublesome. Meanwhile, the broaching force can be accurately tested only by the strain gauge attached to the broach deforming synchronously with the broach, but in the prior art, the broach and the strain gauge are difficult to maintain very synchronous deformation, so that the tested broaching force is inaccurate. In addition, fixed connection between broach and the foil gage is difficult to accomplish completely insulating, and the strain signal who gathers turns into voltage signal and can receive the interference, leads to voltage signal inaccurate, and then makes the broaching force of test inaccurate.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a device for testing broaching force in broaching processing, simple structure not only, convenient operation, the broaching force rate of accuracy that tests moreover is high.

The utility model discloses a realize through following technical scheme:

according to the utility model discloses a device for testing broaching force in broaching machining, including base, anchor clamps and detection mechanism, the anchor clamps centre gripping has the work piece, and detection device includes pressure sensor, and pressure sensor sets up between base and anchor clamps to when being used for the work piece by the broaching, pressure sensor detects the broaching force that the work piece received.

According to the utility model discloses a device for testing broaching force in broaching machining has following technological effect at least: the workpiece is fixed in the clamp, the broaching tool moves linearly to broach the workpiece, in the broaching process, the broaching tool generates broaching force on the workpiece, the workpiece further generates friction force on the clamp, the clamp further applies pressure on the pressure sensor, the pressure sensor generates strain, the pressure sensor further generates voltage difference, the voltage difference changes along with the change of the cutting force, and then the real-time broaching force on the workpiece can be accurately tested. The utility model discloses a device for testing broaching force in broaching processing is simple structure not only, convenient operation, and pressure sensor sets up between base and anchor clamps moreover, through converting the broaching force into pressure to pressure sensor to indirect test broaching force is compared and is located the broach on pasting the foil gage and test broaching force through the synchronous deformation of foil gage and broach, the utility model discloses the device of testing broaching force tests the rate of accuracy of broaching force and is higher.

According to the utility model discloses a some embodiments, anchor clamps are including setting up in the bottom plate of pressure sensor upper end and setting up in the clamp plate of bottom plate top, and the clamp plate passes through a plurality of clamp bolt with the bottom plate to be connected, and the work piece sets up between clamp plate and bottom plate, and when screwing up clamp bolt, bottom plate and clamp plate press from both sides tightly the work piece.

According to some embodiments of the utility model, be provided with the briquetting in the one side of keeping away from work piece broaching end between bottom plate and the clamp plate.

According to some embodiments of the utility model, the briquetting sets up in the clamp plate bottom, is connected through a plurality of fixing bolt between briquetting and the clamp plate.

According to some embodiments of the utility model, the briquetting is less than work piece in the ascending thickness of vertical direction in the thickness of vertical direction.

According to the utility model discloses a some embodiments set up in the mount pad between base and the anchor clamps, and pressure sensor sets up in the mount pad.

According to the utility model discloses a some embodiments, detection mechanism still includes signal acquisition and processing equipment, signal acquisition and processing equipment and pressure sensor electric connection.

According to the utility model discloses a some embodiments, signal acquisition and treatment facility include signal collector and computer, signal collector and pressure sensor electric connection, computer and signal collector electric connection.

According to some embodiments of the utility model, be provided with charge amplifier between pressure sensor and the signal collector.

According to some embodiments of the invention, the pressure sensor is a piezoelectric pressure sensor.

Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic overall structure diagram of an embodiment of the present invention;

fig. 2 is a frame diagram of the working principle of the embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

An apparatus for testing a broaching force in a broaching process according to an embodiment of the present invention will be described with reference to fig. 1 and 2.

According to the utility model discloses a device for testing broaching force in broaching machining, as shown in fig. 1 and 2, including base 100, anchor clamps 200 and detection mechanism, anchor clamps 200 centre gripping has work piece 400, and detection device includes pressure sensor 301, and pressure sensor 301 sets up between base 100 and anchor clamps 200 to when being used for work piece 400 by the broaching, pressure sensor 301 detects the broaching force that work piece 400 received.

In this embodiment, the workpiece 400 is clamped in the clamp 200, the broach moves linearly to broach the workpiece 400, in the broaching process, the broach generates a broaching force on the workpiece 400, the workpiece 400 further generates a friction force on the clamp 200, the clamp 200 applies a pressure on the pressure sensor 301, the pressure sensor 301 deforms, a voltage difference is generated at two ends of the pressure sensor 301, the voltage difference changes along with the change of the cutting force, and then the real-time broaching force received when the workpiece 400 is broached can be accurately tested. The utility model discloses a device for testing broaching force in broaching processing is simple structure not only, convenient operation, and pressure sensor 301 sets up between base 100 and anchor clamps 200 in addition, through converting broaching force into the indirect broaching force that tests of pressure to pressure sensor 301, compares in pasting the foil gage on locating the broach, through the synchronous deformation of foil gage and broach test broaching force, and its rate of accuracy of testing broaching force is higher. It should be noted that the pressure sensor 301 may be a piezoelectric pressure sensor or a resistive pressure sensor.

In some embodiments of the present invention, as shown in fig. 1, the clamp 200 includes a bottom plate 201 disposed on the upper end of the pressure sensor 301 and a pressing plate 202 disposed above the bottom plate 201, the pressing plate 202 is connected to the bottom plate 201 through a plurality of pressing bolts 203, the workpiece 400 is disposed between the pressing plate 202 and the bottom plate 201, and when the pressing bolts 203 are tightened, the bottom plate 201 and the pressing plate 202 clamp the workpiece 400. The base plate 201 and the pressure plate 202 are disposed below and above the workpiece 400, respectively, and are clamped by tightening the hold-down bolts 203. In this embodiment, the number of the pressing bolts 203 may be four and may be set in two sets on both sides of the workpiece 400, and the number of the pressing bolts 203 in each set is two, so that the broaching tool may be fed from the side of the workpiece 400 for broaching, and is suitable for most broaches. It is understood that the length of the pressing bolt 203 can be adjusted according to the thickness of different workpieces 400 in the vertical direction, so that the clamp 200 can clamp different workpieces 400.

In some embodiments of the present invention, as shown in fig. 1, a pressing block 204 is disposed between the bottom plate 201 and the pressing plate 202 on a side away from the broaching end of the workpiece 400. The hold-down bolts 203 are arranged on two sides of the workpiece 400, when the hold-down bolts 203 are screwed down, the workpiece 400 applies pressure to the bottom plate 201 and the pressure plate 202, the hold-down bolts 203 apply tension to the bottom plate 201 and the pressure plate 202, the bottom plate 201 and the pressure plate 202 can be deformed unevenly, and further force applied to the bottom plate 201 by the workpiece 400 is difficult to correspond to cutting force applied to the workpiece 400 one by one, so that the cutting force obtained by testing is inaccurate. In this embodiment, the length direction of the pressing plate 202 may be perpendicular to the length direction of the workpiece 400, and when the pressing bolt 203 is tightened and the bottom plate 201 and the pressing plate 202 tend to deform unevenly on both sides of the workpiece 400, the opposite surfaces of the bottom plate 201 and the pressing plate 202 will be supported against the upper and lower ends of the pressing plate 202, thereby preventing the bottom plate 201 and the pressing plate 202 from deforming continuously, and making the test broaching force more accurate. In addition, the pressing block 204 is arranged to prevent the workpiece 400 from being broached, and the workpiece 400 is subjected to a broaching force which is larger than the friction force given thereto by the clamp 200 and moves along the feed direction of the broaching tool, so that the broaching quality is affected. Moreover, because set up briquetting 204 after, the inhomogeneous deformation of being difficult to take place for bottom plate 201 and clamp plate 202, and then make testing arrangement can be used for testing the broaching force under the heavy load high power, can bear the broaching force that is not more than 50KN in the broaching processing through experimental test.

In some embodiments of the present invention, as shown in fig. 1, the pressing block 204 is disposed at the bottom of the pressing plate 202, and the pressing block 204 is connected to the pressing plate 202 through a plurality of fixing bolts 205. The pressing block 204 is connected to the bottom of the pressing plate 202 through the fixing bolt 205, and different models can be selected for the pressing block 204 according to different types of workpieces 400, so that the pressing block is quick and convenient. Further, the pressing block 204 may be attached to the upper surface of the base plate 201 by a fixing bolt 205.

In some embodiments of the present invention, as shown in fig. 1, the thickness of the pressing block 204 in the vertical direction is smaller than the thickness of the workpiece 400 in the vertical direction, so as to prevent the bottom plate 201 and the pressing plate 202 from clamping the workpiece 400 due to interference. It is understood that, in order to prevent the base plate 201 and the pressure plate 202 from being deformed unevenly under stress, the thickness of the pressing block 204 in the vertical direction is smaller than but close to the thickness of the workpiece 400 in the vertical direction.

In some embodiments of the present invention, as shown in fig. 1, a mounting seat 500 is disposed between the base 100 and the fixture 200, and the pressure sensor 301 is disposed in the mounting seat 500. The mount 500 serves to prevent the pressure sensor 301 from being directly exposed to the outside and damaged. The mount 500 may be provided on the base 100, the pressure sensor 301 may be provided in the mount 500, and the pressure sensor 301 may be connected to the jig 200. Alternatively, both ends of the pressure sensor 301 may be connected to the base 100 and the clamp 200, and the mounting base 500 is sleeved outside the pressure sensor 301.

In some embodiments of the present invention, as shown in fig. 2, the detection mechanism further includes a signal collecting and processing device, and the signal collecting and processing device is electrically connected to the pressure sensor 301. The voltage inside the pressure sensor 301 changes with the cutting force, and the voltage change signal is acquired, processed and analyzed by the signal acquisition and processing device, so that the accurate cutting force is finally obtained.

In some embodiments of the present invention, as shown in fig. 2, the signal collecting and processing device includes a signal collector 302 and a computer 303, the signal collector 302 is electrically connected to the pressure sensor 301, and the computer 303 is electrically connected to the signal collector 302. The signal collector 302 collects the voltage change signal of the pressure sensor 301 and converts the voltage change signal into a digital signal, then the digital signal is input into the computer 303, data analysis software is installed in the computer 303, and an analysis map of the broaching force can be displayed in a display of the computer 303 through analysis processing of the data analysis software, so that the method is fast, convenient, accurate and reliable. It should be noted that the signal collector 302 may adopt JCJ716AI type intelligent data collector produced by the jiekin jiuchun technologies development limited company, or Kistler 5697A type USB high-speed multifunctional collector produced by switzerland instruments company, or LMS SCADAIII type data collector produced by the LMS company, or MMC data collection card produced by the MMC company; the computer 303 may be equipped with the dynaware software developed by switzerland instruments, or the LMS test.

In some embodiments of the present invention, as shown in fig. 2, a charge amplifier 304 is disposed between the pressure sensor 301 and the signal collector 302. The voltage change signal output by the pressure sensor 301 is filtered, amplified, smoothed and denoised by the charge amplifier 304 and then converted into an analog electric signal, and the analog electric signal is acquired, processed and analyzed by the signal acquisition and processing equipment, so that more accurate cutting force can be obtained finally. The charge amplifier 304 may be a BZ2103 integrated charge amplifier manufactured by comet-sincery technologies ltd in beijing or a Kistler 5070A multi-channel amplifier manufactured by switzerland instruments.

The utility model discloses an in some embodiments, pressure sensor 301 is piezoelectric type pressure sensor, and piezoelectric type pressure sensor utilizes the direct piezoelectric effect to make, and the response is sensitive, simple to operate. The piezoelectric strain gauges are arranged inside the piezoelectric pressure sensor, can be arranged in all directions in a plurality of modes, and then can measure component force of the broaching force in all directions. The piezoelectric strain gauge may be a quartz piezoelectric strain gauge or a PCB board piezoelectric strain gauge. Further, the pressure sensor 301 may also be a resistive pressure sensor.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A device for testing broaching force in broaching machining is characterized in that: including base (100), anchor clamps (200) and detection mechanism, anchor clamps (200) centre gripping has work piece (400), detection mechanism includes pressure sensor (301), pressure sensor (301) set up in base (100) with between anchor clamps (200), so that when work piece (400) is broached, pressure sensor (301) can detect the broaching force that work piece (400) received.

2. The apparatus for testing a broaching force in a broaching process as recited in claim 1, wherein: the clamp (200) comprises a bottom plate (201) arranged at the upper end of the pressure sensor (301) and a pressing plate (202) arranged above the bottom plate (201), the pressing plate (202) is connected with the bottom plate (201) through a plurality of pressing bolts (203), the workpiece (400) is arranged between the pressing plate (202) and the bottom plate (201), and when the pressing bolts (203) are screwed down, the bottom plate (201) and the pressing plate (202) clamp the workpiece (400).

3. The apparatus for testing a broaching force in a broaching process as recited in claim 2, wherein: a pressing block (204) is arranged between the bottom plate (201) and the pressing plate (202) and on one side far away from the broaching end of the workpiece (400).

4. A device for testing a broaching force in a broaching process as recited in claim 3, wherein: the pressing block (204) is arranged at the bottom of the pressing plate (202), and the pressing block (204) is connected with the pressing plate (202) through a plurality of fixing bolts (205).

5. The apparatus for testing a broaching force in a broaching process as recited in claim 4, wherein: the thickness of the pressing block (204) in the vertical direction is smaller than that of the workpiece (400).

6. An apparatus for testing a broaching force in a broaching process according to any one of claims 1 to 5, characterized in that: the pressure sensor is characterized in that a mounting seat (500) is arranged between the base (100) and the clamp (200), and the pressure sensor (301) is arranged in the mounting seat (500).

7. An apparatus for testing a broaching force in a broaching process according to any one of claims 1 to 5, characterized in that: the detection mechanism further comprises signal acquisition and processing equipment, and the signal acquisition and processing equipment is electrically connected with the pressure sensor (301).

8. An apparatus for testing a broaching force in a broaching process as recited in claim 7, wherein: the signal acquisition and processing equipment comprises a signal collector (302) and a computer (303), wherein the signal collector (302) is electrically connected with the pressure sensor (301), and the computer (303) is electrically connected with the signal collector (302).

9. An apparatus for testing a broaching force in a broaching process as recited in claim 8, wherein: a charge amplifier (304) is arranged between the pressure sensor (301) and the signal collector (302).

10. An apparatus for testing a broaching force in a broaching process according to any one of claims 1 to 5, characterized in that: the pressure sensor (301) is a piezoelectric pressure sensor.