CN110108468A - A kind of stirring-type saw chain fatigue experimental device - Google Patents

Abstract

The invention discloses a stirring type saw chain fatigue test device, which includes a bottom frame, a box body, a box cover and a chain saw. The fatigue test device also includes a stirring mechanism driven by a motor. An electrical control system is provided, and the electrical control system includes control buttons, a programmable controller, an analog-to-digital converter, a speed governor and an acceleration sensor. The invention eliminates the phenomenon of frequent shutdown due to blockage of saw chains in the saw chain fatigue test, and significantly improves the test efficiency; during the test, the steering and rotation speed of the stirring motor can be controlled to make the test conditions more stable; the test device can automatically time and Determine the test status.

Description

A Stirring Type Saw Chain Fatigue Test Device

technical field

The invention relates to the technical field of forestry machinery, in particular to a stirring type saw chain fatigue test device.

Background technique

Chainsaws, including chainsaws, electric chainsaws and sawing mechanisms in the working heads of logging machines, are essential production tools in the forest harvesting and gardening industries. The cutting part of the chain saw is called the saw chain. The saw chain is a closed chain that is arranged in a certain order by the saw teeth, connecting pieces and guide teeth, and hinged by the chain shaft. The performance of the sawtooth has a great influence on the energy consumption of the chain saw, sawing efficiency, labor intensity of the staff and production safety. Forestry production is temporary and decentralized, and it is not convenient for equipment maintenance during the production process. These production characteristics require the durability of saw chain teeth to be very high, so it is of great significance to develop a test device that can evaluate the fatigue life of chain saw teeth.

There are two kinds of saw chain test devices at present, one is to use high-speed no-load test to test the fatigue life of saw chain. The no-load test can only assess the fatigue life of the connecting piece and the guide teeth in the saw chain, and cannot test the fatigue life of the saw teeth that play a cutting role in the sawing process, and the test conditions are quite different from the actual sawing conditions of the saw chain. Far. The other is the embedded fatigue test method, that is, the saw chain and the saw board are inserted into the wood test box, and the saw chain fatigue test with load is carried out. This saw chain fatigue test method is prone to problems such as block jamming, low cutting efficiency, and the need to manually adjust the position of the block during the test.

Contents of the invention

The object of the present invention is to provide a stirring type saw chain fatigue test device to solve the problems raised in the above-mentioned background technology.

To achieve the above object, the present invention provides the following technical solutions:

A stirring type saw chain fatigue test device, including a chassis, a box body, a box cover and a chain saw, the fatigue test device also includes a stirring mechanism driven by a motor, and an electrical control device is connected under the box cover system, the electrical control system includes control buttons, a programmable controller, an analog-to-digital converter, a governor and an acceleration sensor.

Further, the underframe includes underframe angle steel, underframe channel steel, underframe supporting plate, underframe bearing seat and underframe bearing, and the underframe bearing is fixed on the underframe bearing seat, and the underframe bearing seat The lower end is connected with a motor, and the motor drives the stirring mechanism to run; the upper end of the bottom frame is connected with a box.

Further, the box body includes box cover angle steel, side plate retaining iron, box body column, column connecting strip and box body side plate, the upper end of the box cover angle steel is used for installing the box cover; the lower end of the box cover angle steel is connected with the box body Column, the box column connects the box cover angle steel and the bottom frame angle steel to form a box-shaped frame; the box column is also welded with multiple sets of side plate iron stoppers, and the gap between the side plate iron stopper and the box body column Insert the cabinet side panels.

Further, the tank cover includes a left tank cover, a right tank cover and a fixed cover, the fixed cover is fixed on the upper end of the angle steel of the tank cover, and a support plate is arranged on the fixed cover, and the two sides of the support plate A left box cover and a right box cover are arranged symmetrically.

Further, the support plate includes a backing plate for connecting and fixing the cover plate and a vertical plate arranged perpendicularly to the backing plate, and there are multiple sets of joints between the backing plate and the vertical plate that are perpendicular to the backing plate and the vertical plate Connected stiffeners.

Further, the left box cover and the right box cover are both arranged on the upper edge of the box cover angle steel, and the edges of the left box cover and the right box cover near the fixed cover are movably attached to the fixed cover, and the left box cover Both the plate and the right case cover are provided with handles, and the side of the right case cover close to the fixed cover is symmetrically embedded with the edge of the fixed cover to be provided with a strip-shaped notch, and the notch is opposite to the chain saw.

Further, the stirring mechanism includes a bearing sealing cover, a stirring tray, a stirring block, a stirring tray seat and a stirring shaft, the stirring shaft is installed on the bottom frame bearing, and is connected and driven by the bottom frame bearing and the motor through a flat key; The upper end of the stirring shaft is connected with the stirring tray, and a stirring tray seat is arranged at the center of the upper end of the stirring tray, and the surface of the stirring tray is densely covered with circular holes; the periphery of the stirring tray seat is connected with multiple groups of stirring blocks.

Further, a stirring shaft gland is provided at the center of the upper end of the stirring tray seat, and the gland screw is attached to the upper end of the stirring shaft, and is assembled and connected by the gland screw, and the edge of the gland screw is closely connected to the upper end of the stirring tray seat fit.

Further, the stirring block is a trapezoidal stainless steel thin plate, the lower edge of the stirring block is attached to the stirring tray, and the upper edge is gradually inclined downward from the outside to the stirring tray seat.

Further, the programmable controller is electrically connected to the control button, the analog-to-digital converter, the governor and the acceleration sensor, and the control button and the governor are electrically connected to the motor.

Compared with prior art, the beneficial effect of the present invention is:

1. It eliminates the phenomenon of frequent shutdown due to wooden blocks in the saw chain fatigue test, and significantly improves the test efficiency.

2. During the test, the steering and rotation speed of the stirring motor can be controlled to make the test conditions more stable.

3. The test device can automatically time and judge the test status.

Description of drawings

Fig. 1 is a structural schematic diagram of a stirring saw chain fatigue test device.

Fig. 2 is a structural schematic diagram of a box in a stirring saw chain fatigue test device.

Fig. 3 is a schematic top view of a case cover in a stirring saw chain fatigue test device.

Fig. 4 is a schematic front view of a case cover in a stirring saw chain fatigue test device.

Fig. 5 is a structural schematic diagram of the underframe in a stirring saw chain fatigue test device.

Fig. 6 is a sectional view along A-A direction in Fig. 5 .

Fig. 7 is a structural schematic diagram of a stirring mechanism in a stirring saw chain fatigue test device.

Fig. 8 is a schematic diagram of connection of a stirring tray, a stirring tray seat and a stirring block in a stirring saw chain fatigue test device.

Fig. 9 is a top view of a stirring mechanism in a stirring saw chain fatigue test device.

Fig. 10 is a control schematic diagram of an electric control system in a stirring saw chain fatigue test device.

In the figure: 1-underframe angle steel, 2-underframe channel steel, 3-underframe support plate, 4-underframe bearing seat, 5-underframe bearing, 6-bearing sealing cover, 7-stirring tray, 8-stirring Block, 9-stirring tray seat, 10-stirring shaft, 11-stirring shaft gland, 12-glanding screw, 13-cover angle steel, 14-side plate stop iron, 15-box column, 16-column connecting strip , 17-casing side plate, 18-left case cover plate, 19-right case cover plate, 20-fixed cover plate, 21-support plate, 22-chain saw, 23-motor.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Example 1

Please refer to Fig. 1～9, in the embodiment of the present invention, a kind of agitation type saw chain fatigue test device comprises chassis, box body, box cover and chain saw 22, described box is filled with wooden block, and chain saw 22 extends Into the casing, the chain saw 22 is constantly sawing wood so as to carry out fatigue detection to it.

The fatigue test device also includes a stirring mechanism driven by the motor 23, and the stirring mechanism is used to drive the block when the chain saw 22 is stuck in the process of sawing wood, so as to drive the block to shake, so as to overcome the blockage of the chain saw and the block The problem.

The underframe includes an underframe angle steel 1, an underframe channel steel 2, an underframe supporting plate 3, an underframe bearing block 4 and an underframe bearing 5, and the underframe angle steel 1, underframe channel steel 2, and underframe supporting plate 3 and the bottom frame bearing seat 4 are formed by welding, so as to play the role of supporting the box body, the test block, and the test chain saw. The bottom frame bearing seat 4 is fixed with the bottom frame bearing 5 through transition fit. The lower end of the frame bearing seat 4 is connected with a motor 23 by bolts, and the motor 23 drives the stirring mechanism to run.

Described box body comprises case cover angle steel 13, side plate retaining iron 14, box body column 15, column connection bar 16 and box body side plate 17, is used for installing box cover on described box cover angle steel 13; Case cover angle steel 13 is Box-shaped structure, and the four corners of the lower end of the box cover angle steel 13 are vertically connected with the box body column 15, and the box body column 15 connects the box cover angle steel 13 and the bottom frame angle steel 1 to form a box-shaped frame, and the joints are connected by bolts Fixed; the effect of the column connection bar 16 is to divide the four box body columns 15 into two groups before and after each group, and each group is formed into one piece. This effect is to improve the strength of the box body and make the box body easy to disassemble and check; the box body column 15 There are also multiple groups of side plate baffles 14 welded on the top, and the box side plate 17 is inserted between the side plate baffle 14 and the box body column 15, so that the box body side plate 17 cooperates with the box body column 15, box The cover angle steel 13 and the bottom frame angle steel 1 form a space for accommodating wood.

Described box cover comprises left box cover plate 18, right box cover plate 19 and fixed cover plate 20, and described fixed cover plate 20 is fixed on the upper end of box cover angle steel 13 by bolt connection, and is provided with on the fixed cover plate 20 by bolt connection Support plate 21, described support plate 21 comprises the backing plate that is used to connect fixed cover plate 20 and the vertical plate that is arranged vertically with backing plate, the junction of backing plate and vertical plate is provided with many groups and backing plate and vertical plate Reinforcing ribs that are all vertically connected to each other, the vertical plate on the support plate 21 is used to assemble and fix the chain saw 22, and the chain saw 22 is fixed on the support plate 21 by bolt connection during use, and the two sides of the support plate 21 are arranged symmetrically Left box cover plate 18 and right box cover plate 19 are arranged, and described left box cover plate 18 and right box cover plate 19 all and box cover angle steel 13 upper edge movably engage, and left box cover plate 18 and right box cover plate 19 The edge near the fixed cover plate 20 is movably fitted with the fixed cover plate 20, and the left case cover plate 18 and the right case cover plate 19 are all provided with handles, and the side of the right case cover plate 19 near the fixed cover plate 20 is connected with the fixed cover plate 20. The edge of the cover plate 20 is symmetrically embedded with a strip-shaped notch, and the notch is opposite to the chain saw 22. During the test, the left box cover plate 18 and the right box cover plate 19 cooperate with the fixed cover plate 20 to close the box body, and the left box is opened when the machine is stopped. Cover plate 18 and right box cover plate 19 can add test block, adjust or install fixed cover plate 20 and support plate 21 and check the test state in the casing, and the saw chain and sawing plate of chain saw 22 are inserted in the casing by gap.

The stirring mechanism includes a bearing sealing cover 6, a stirring tray 7, a stirring block 8, a stirring tray seat 9, a stirring shaft 10, a stirring shaft gland 11 and a gland screw 12, and the stirring shaft 10 is installed on the bottom frame bearing 5 on, and through the bottom frame bearing 5 and the motor 23 through the flat key connection transmission; the center of the upper end of the stirring tray 7 is welded with a stirring tray seat 9, and the upper end of the stirring shaft 10 is connected with the stirring tray seat 9 with a flat key, and the stirring shaft 10 will The driving torque of the motor 23 is transmitted to the stirring tray seat 9. The stirring tray 7 is used to carry wood blocks, and the surface of the stirring tray 7 is densely covered with circular leak holes, and the wood chips can fall through the circular leak holes during the test, thereby avoiding fine debris. Chips affect the test, avoiding the difficulty of rotation caused by too tight accumulation of wood blocks; the stirring shaft gland 11 is provided at the center of the upper end of the stirring tray seat 9, and the gland screw 12 is fitted to the upper end of the stirring shaft 10, and is passed through the gland screw 12 The assembly connection is fixed, and the edge of the gland screw 12 is closely attached to the upper end of the stirring tray seat 9 to avoid contamination of the stirring shaft 10 and the bottom frame bearing 5; the peripheral connection of the stirring tray seat 9 is provided with multiple sets of stirring blocks 8, preferably There are four groups, and the stirring block 8 is a trapezoidal stainless steel sheet. The lower side edge of the stirring block 8 is fitted to the stirring tray 7, and the upper edge is gradually inclined downward from the outside to the stirring tray seat 9. The stirring block 8. Driven by the stirring tray seat 9, the wooden block can be driven to shake, thereby overcoming the jamming problem of the chain saw 22 during operation.

Example 2

Please refer to the stirring shaft 10 in the figure, in the embodiment of the present invention, a stirring type saw chain fatigue test device, on the basis of embodiment 1, an electrical control system is also connected under the cover, and the electrical control system includes control button, programmable logic controller (PLC), analog-to-digital converter (A/D), speed governor and acceleration sensor, and the programmable controller and control button, analog-to-digital converter, speed governor and acceleration sensor are all By electrical connection, the control button and the speed governor are all electrically connected with the motor 23, and the programmable controller is used as the main control device to control the start/stop of the chain saw 22, the start/stop, speed regulation and operation of the motor 23. Forward and reverse control: the acceleration sensor is arranged on the support plate 21, and by performing real-time detection of the vibration acceleration of the chain saw 22, an analog signal of the vibration acceleration is obtained, and the detected analog signal is converted into a digital quantity through an analog-to-digital converter, The programmable controller stores the digital quantity in its memory, and compares the digital quantity with the preset value by the programmable controller. When the vibration acceleration exceeds the preset value, the chain saw 22 and the motor 23 stop running; The programmable controller starts timing, and when the accumulated time reaches 10 hours, it will stop automatically. If the test block jams during the test, you can use the control button to change the direction of the motor 23, or use the governor to adjust the speed of the motor 23 to eliminate the test block. Jamming, no need to stop and adjust the wooden block.

The programmable controller model is Mitsubishi FX3U-32MR, the analog-to-digital converter model is Mitsubishi FX3U-4AD, the governor model is Jingyan SK series built-in governor, the acceleration sensor is Chengke CT1005LC, and the stirring motor model is Jingyan 200YT03.

The operation method of the test process:

1. The test chain saw 22 is fixed on the support plate 21 by bolts and clips;

2. Fix the fixed chain saw 22 and support plate 21 on the fixed cover plate 20 with bolts, and insert the saw plate into the box through the gap;

3. Power on the control system and start the chain saw 22 for testing;

4. If the chain saw 22 vibrates too much during the test or the test time reaches 10 hours, the system will stop. At this time, check and record the wear state of the saw chain and saw board;

5. If there is no wear, continue the test until the saw chain and saw board wear (generally takes 30-80 hours), and then end the test.

The precautions are mainly to pay attention to the safety of the test. The tester and the test device should keep a distance of more than 1 meter. The saw chain and the saw board are only lubricated once before the test, and no lubricating oil is added during the test.

The working principle of the present invention is: when the stirring type saw chain fatigue test device is tested, the support plate 21 and the fixed cover plate 20 are first connected and fixed by bolts, and then the chain saw 22 is installed on the vertical plate of the support plate 21 through the bolt assembly , and the chainsaw saw plate of the chain saw 22 passes through the gap of the fixed cover plate 20 and the right case cover plate 19 sides; Fix the height of the bottom surface of the cover plate 20, then cover the left case cover plate 18 and the right case cover plate 19, after starting the chain saw 22 and the motor 23, the test begins, and the motor 23 drives the stirring tray seat 9 and the stirring block through the stirring shaft 10 8 is rotated, so that the wood is shaken synchronously, which can avoid the jamming problem between the chain saw 22 and the wood block. When the chain saw 22 unexpectedly jams during the sawing process during the test, the motor can still be driven by the control button 23 Reverse rotation or accelerated rotation, so as to overcome the problem of jamming, no need to stop and adjust the wooden block, so as to ensure the smooth progress of the test; after the chain saw 22 is started, the programmable controller starts timing, and the accumulated time reaches 10 hours and automatically stops. Acceleration sensor Through the real-time detection of the vibration acceleration of the chain saw 22, the analog signal of the vibration acceleration is obtained, and the detected analog signal is converted into a digital quantity through an analog-to-digital converter, and the programmable controller stores the digital quantity in its memory, and the programmable controller stores the digital quantity in its memory. The controller compares the digital quantity with a preset value, and when the vibration acceleration exceeds the preset value, the chain saw 22 and the motor 23 stop running.

The standard parts used in the present invention can be purchased from the market, and the special-shaped parts can be customized according to the instructions and the records of the accompanying drawings. The specific connection methods of each part adopt mature bolts, rivets, welding, etc. in the prior art. Conventional means, machinery, parts and equipment all adopt conventional models in the prior art, plus circuit connections adopt conventional connection methods in the prior art, and will not be described in detail here.

It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (10)

1. a kind of stirring-type saw chain fatigue experimental device, including chassis, cabinet, case lid and chain saw (22), which is characterized in that described It further include by the rabbling mechanism of motor (23) driving operation assemblied by activity, the case lid in fatigue experimental device Lower section, which is also connected with, is provided with electric control system, the electric control system include control button, programmable controller (PLC), Analog-to-digital conversion device (A/D), governor and acceleration transducer.

2. a kind of stirring-type saw chain fatigue experimental device according to claim 1, which is characterized in that the chassis includes bottom Frame angle steel (1), chassis channel steel (2), chassis supporting plate (3), chassis bearing block (4) and chassis bearing (5), the chassis bearing block (4) it is fixed on chassis bearing (5), chassis bearing block (4) lower end is connected with motor (23), and the motor (23) is driven Dynamic rabbling mechanism operation；The chassis upper end is connected with cabinet.

3. a kind of stirring-type saw chain fatigue experimental device according to claim 2, which is characterized in that the cabinet includes case Lid angle steel (13), side plate buting iron (14), cabinet column (15), column connection strap (16) and box side (17), the case lid angle For installing case lid on steel (13)；Case lid angle steel (13) lower end is connected with cabinet column (15), and the cabinet column (15) is by case Lid angle steel (13) and chassis angle steel (1) connection composition box-shaped frame；Also welding is provided with multiple groups side plate on cabinet column (15) Buting iron (14), and box side (17) are inserted between side plate buting iron (14) and the gap of cabinet column (15).

4. a kind of stirring-type saw chain fatigue experimental device according to claim 3, which is characterized in that the case lid includes a left side Cover plate (18), right cover plate (19) and fixation cover board (20), the fixed cover board (20) are fixed on case lid angle steel (13) upper end, And be provided with support plate (21) on fixed cover board (20), support plate (21) two sides are symmetrically arranged with left cover plate (18) and the right side Cover plate (19).

5. a kind of stirring-type saw chain fatigue experimental device according to claim 4, which is characterized in that the support plate (21) Including the vertical plate for being connected and fixed the backing plate of cover board (20) and being arranged in a mutually vertical manner with backing plate, the junction of backing plate and vertical plate Branch is provided with multiple groups and backing plate and vertical plate mutually reinforcing rib connected vertically.

6. a kind of stirring-type saw chain fatigue experimental device according to claim 4, which is characterized in that the left cover plate (18) and right cover plate (19) is arranged at case lid angle steel (13) upper end, and left cover plate (18) and right cover plate (19) are close to solid The edge for determining cover board (20) is bonded with fixed cover board (20) activity, is equipped with handle on left cover plate (18) and right cover plate (19) Hand, the right cover plate (19) are symmetrically embedded in close to the side of fixed cover board (20) and the edge of fixed cover board (20) and are provided with length Bar shaped gap, and gap and chain saw (22) are opposite.

7. a kind of stirring-type saw chain fatigue experimental device according to claim 2, which is characterized in that the rabbling mechanism packet Include bearing seal cover (6), stirring pallet (7), stirring block (8), stirring tray seat (9) and agitating shaft (10), the agitating shaft (10) it is mounted on chassis bearing (5), and transmission is connected by flat key with motor (23) by chassis bearing (5)；Stirring Pallet (7) upper end center is provided with stirring tray seat (9), and agitating shaft (10) upper end connect with stirring tray seat (9), stirring Pallet (7) surface is densely covered with round leak hole；Stirring tray seat (9) periphery is connected with multiple groups stirring block (8).

8. a kind of stirring-type saw chain fatigue experimental device according to claim 7, which is characterized in that stirring tray seat (9) Upper end the center point is equipped with agitating shaft gland (11), the gland screw (12) and the fitting setting of agitating shaft (10) upper end, and passes through Gland screw (12) assembly connection is fixed, and gland screw (12) edge is fitted closely with stirring tray seat (9) upper end.

9. a kind of stirring-type saw chain fatigue experimental device according to claim 7, which is characterized in that stirring block (8) is ladder Shape stainless sheet steel, stirring block (8) lower edge and stirring pallet (7) fitting setting, upper edge are in from export-oriented stirring Tray seat (9) direction is skewed gradually downward.

10. a kind of stirring-type saw chain fatigue experimental device according to claim 1, which is characterized in that the programmable control Device processed and control button, analog-to-digital conversion device (A/D), governor and acceleration transducer pass through electric connection, and the control is pressed Button and governor are and motor (23) passes through electric connection.