CN106965062B - A contact type wire belt grinding device - Google Patents

Abstract

A contact-type wire-belt grinding processing device has a support unit arranged on the front side of the bed for supporting and moving a workpiece to be ground, and an inverted triangular support located on the support unit and fixed on the front side of the bed, The grinding mechanism used for grinding the workpiece to be ground, the cooling mechanism arranged on the front side of the bed for cooling the grinding mechanism, the support unit includes a cooling mechanism arranged on the cooling liquid recovery tank The vertical movement mechanism used to drive the workpiece to be ground to move vertically, and the horizontal movement mechanism set on the vertical movement mechanism to drive the workpiece to be ground to move horizontally. The grinding mechanism includes several independent diamond wires arranged in space The formed diamond wire belt and the take-up and release mechanism arranged on the inverted triangle support for supporting and driving the diamond wire belt to grind the workpiece to be ground. The invention greatly reduces the grinding heat generated during processing, reduces the residual stress caused by the grinding heat, and improves the surface quality of the processed surface.

Description

A contact type wire belt grinding device

technical field

The invention relates to a grinding processing device. In particular, it relates to a contact-type wire belt grinding device suitable for processing brittle materials and non-heat-resistant materials.

Background technique

With the continuous progress and development of aviation, aerospace, automobile, motorcycle and light industry, the application and processing technology of metal materials such as aluminum alloy, titanium alloy, stainless steel and structural steel and non-metallic materials such as engineering ceramics have attracted more and more attention. Manufacturers and material experts and scholars at home and abroad are generally concerned and highly valued. As we all know, metal materials have excellent properties, but when they are machined, they have poor processing technology and high processing costs due to certain mechanical and physical properties. Since grinding is often the last processing procedure of mechanically processed products, the quality of its processing effect directly affects the final quality and performance of the product. Therefore, facing the development of modern industry, the quality, accuracy, integrity and cost of metal material surface processing The traditional grinding method is mainly abrasive belt grinding.

Abrasive belt grinding can be used to process almost all engineering materials. As a new technology known as "universal grinding" and "cold grinding" in the field of advanced manufacturing technology, abrasive belt grinding has become the same as grinding wheel grinding. Important and indispensable processing method. At present, the process of abrasive belt grinding metal materials mainly refers to placing the ring-shaped abrasive belt on the outer circle of the tension wheel and the contact wheel. Under a certain state, the rotating abrasive belt is in close contact with the processing surface of the workpiece to be processed. , Under pressure, use this friction to grind metal materials. The abrasive belt is a single-layer abrasive coated abrasive tool. When the grinding starts, only a few abrasive grains in the grinding debris space participate in cutting, which causes a small amount of abrasive grains to overload, chipping, cracking or falling off at the top of the cutting edge.

In addition, abrasive belt grinding still has many deficiencies in practical applications: because the abrasive belt uses fabric or paper as the base belt, the strength is low, and high-speed grinding and strong grinding cannot be performed. The abrasive belt is a closed-loop operation, the length is limited, and the belt needs to be changed frequently. At the same time, in order to avoid abrasive belt running during processing, the pressure grinding wheel in abrasive belt grinding is often made into a spindle shape, which affects the processing accuracy to a certain extent.

Contents of the invention

The technical problem to be solved by the present invention is to provide a contact type wire belt grinding device that can realize high-speed, heavy-load and ultra-wide processing.

The technical solution adopted by the present invention is: a contact-type wire belt grinding device, including a support unit arranged on the front side of the bed for supporting and moving the workpiece to be ground, and a support unit located on the support unit and An inverted triangular bracket fixed on the front side of the bed, a grinding mechanism for grinding workpieces to be ground, and a cooling mechanism arranged on the front side of the bed for cooling the grinding mechanism, the The supporting unit includes a vertical movement mechanism for driving the workpiece to be ground to move vertically on the cooling liquid recovery tank of the cooling mechanism, and a vertical movement mechanism for driving the workpiece to be ground horizontally on the vertical movement mechanism. The moving horizontal movement mechanism, the grinding mechanism includes a diamond wire belt composed of several independent diamond wires arranged in space and arranged on an inverted triangular support for supporting and driving the diamond wire belt to grind the workpiece Grinding take-up and pay-off mechanism.

The vertical movement mechanism includes a workbench and two vertical motors arranged diagonally on the front and rear sides of the coolant recovery tank, and the output shafts of the two vertical motors are respectively connected to a Vertical lead screw, the two vertical lead screws on the workbench are formed with internal threads, and are threadedly connected with the two vertical lead screws through the internal threads, and the front and rear of the cooling liquid recovery tank Each side is also diagonally provided with a guide post that runs through the workbench, and each guide post is arranged side by side and parallel to the vertical lead screw located on the same side of the cooling liquid recovery tank.

The horizontal movement mechanism includes two guide rails arranged in parallel on the workbench in the vertical movement mechanism along the front and rear directions, and the two guide rails are installed on the two guide rails and can move forward and backward along the two guide rails for placing the A slide block for grinding workpieces, the slide block is connected with a horizontal lead screw through an internal thread formed in the middle part, and the front end of the horizontal lead screw is connected with a horizontal motor arranged on the front side of the workbench. The rear end of the horizontal lead screw is arranged on the rear side of the workbench through a bearing.

The inverted triangular support includes: an inverted triangular side frame, three bearing rings with the same structure that are integrally connected to the three corners of the inverted triangular side frame for supporting the take-up and release mechanism, and one end connected to the inverted triangular The side frame, the other end of which is connected to the three fixed frames on the front side of the bed, the three fixed frames have the same structure and are all L-shaped structures, wherein the long sides of the three L-shaped structures are vertically connected in an inverted triangle The middle part of the three sides of the side frame and the short sides of the three L-shaped structures are respectively fixed on the front side of the bed by bolts.

The take-up and pay-off mechanism includes a left wire collection wheel, a right wire collection wheel, and a grinding wheel, and one end of the left wire collection wheel, the right wire collection wheel, and a grinding wheel is respectively connected to the horizontal side formed on the inverted triangle side frame. In the bearing rings at the left and right ends of the bed, the other ends of the left wire gathering wheel, the right wire gathering wheel and the pressure grinding wheel are respectively connected to the front side of the bed through bearings, and the rear side of the bed corresponds to the left wire gathering The wheel, the right wire gathering wheel and the pressure grinding wheel are respectively provided with a left wire gathering wheel motor, a right wire gathering wheel motor and a pressure grinding wheel motor, and the output shafts of the left wire gathering wheel motor, the right wire gathering wheel motor and the pressure grinding wheel motor are respectively Through the bed, it is connected with the left wire collection wheel, the right wire collection wheel and the grinding wheel arranged on the front side of the bed, one end of the diamond wire is wound on the left wire collection wheel, and the other end is wound through the pressure grinding wheel On the right wire collection wheel, the pressure grinding wheel is pressed on the diamond wire belt formed by the diamond wire, so that the diamond wire belt is in contact with the surface of the workpiece and rubbed.

Grooves for guiding the diamond wire are respectively formed on the outer surfaces of the left wire collection wheel, the right wire collection wheel and the pressure grinding wheel, and grooves are formed on the left wire collection wheel, the right wire collection wheel and the pressure grinding wheel. The number of grooves on the outer surface of the grinding wheel is equal and arranged parallel to and equidistant from each other.

The grooves formed on the outer surfaces of the left and right wire pulleys are U-shaped grooves formed parallel to each other and equally spaced for winding a certain amount of diamond wire.

The grooves formed on the outer surface of the pressure grinding wheel are V-shaped grooves parallel to each other and formed at equal intervals, and the diamond wires are half-embedded in the V-shaped grooves.

U-shaped grooves parallel to each other and equally spaced for winding a certain amount of diamond wire are formed on the outer surfaces of the left and right wire gathering wheels, and the outer surface of the pressure grinding wheel is a smooth structure. The number of U-shaped grooves formed on the outer surfaces of the left and right wire collectors is equal and arranged in parallel with each other at equal intervals, and the diamond wires are completely embedded in the U-shaped grooves .

The cooling mechanism includes a coolant recovery tank whose rear side is fixed on the front side of the bed and two L-shaped coolant guides, the bottom ends of the vertical parts of the two L-shaped coolant guides form a The liquid port is connected to the liquid outlet of the cooling liquid recovery tank, the liquid outlet of the cooling liquid recovery tank is provided with a liquid outlet pump, and the horizontal parts of the two L-shaped cooling liquid guides are respectively located in the inverted triangle The two sides of the grinding wheel in the bracket are arranged parallel to the grinding wheel, and the end of the horizontal part of the L-shaped cooling liquid guideway constitutes a nozzle for spraying cooling liquid on the diamond wire belt made of diamond wires.

A kind of contact type wire belt grinding processing device of the present invention, because the diamond wire has a large contact area with the surrounding environment, and the thermal conductivity of the metal is stronger than the base material (paper, cloth, composite base belt, etc.) The grinding heat is greatly reduced, which reduces the residual stress caused by the grinding heat and improves the surface quality of the processed surface. At the same time, there is a gap between the diamond wires during the contact wire belt grinding process. When the wire belt moves at high speed, the generated grinding debris can be taken out and shaken off naturally. The tool is not easy to be blocked, and high-speed heavy-duty ultra-wide machining can be realized. It is convenient to replace the wire belt after it fails, eliminating the process of dressing the grinding wheel and saving costs. Diamond wire has high strength, long life and high processing efficiency. It is suitable for grinding flat, curved surfaces, outer circles, special-shaped shafts, etc., especially for grinding difficult-to-machine materials such as titanium alloys, engineering ceramics, ultra-high alloy steel, and sapphire.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the contact type wire belt grinding processing device of the present invention;

Fig. 2 is a schematic view of the front structure of the contact type wire belt grinding device of the present invention;

Fig. 3 is a schematic view of the side structure of the contact type wire belt grinding device of the present invention;

Fig. 4 is the overall structural representation of triangular support in the present invention;

Fig. 5 is a schematic diagram of the structure of U-shaped grooves formed on the left wire collection wheel and the right wire collection wheel in the present invention;

Fig. 6 is a schematic diagram of the structure of the V-shaped groove formed on the intermediate pressure grinding wheel of the present invention.

in the picture

1: Bed 2: Left hub

3: Nozzle 4: L-shaped coolant guide

5: Coolant recovery tank 6: Guide rail

7: Guide post 8: Vertical lead screw

9: Vertical motor 10: Workbench

11: slider 12: diamond wire

13: Grinding wheel 14: Right hub wheel

15: Horizontal lead screw 16: Horizontal motor

17: Left hub motor 18: Right hub motor

19: Grinding wheel motor 20: U-shaped groove

21: V-groove 22: Diamond wire belt

23: Inverted triangle bracket 231: Inverted triangle side frame

232: Bearing ring 233: Fixing frame

detailed description

A contact type wire belt grinding device of the present invention will be described in detail below with reference to the embodiments and the accompanying drawings.

A contact type wire belt grinding processing device of the present invention is a new type of processing device integrating traditional abrasive belt grinding and a newly developed diamond wire. The base of the diamond wire is steel wire, and a layer of artificial diamond abrasive particles is evenly consolidated on the surface. The two wire collecting wheels and the pressure grinding wheel have the same axial length and are arranged in parallel, and the specific arrangement orientation in space can be changed according to the actual working conditions. There are densely arranged grooves on the wheel to constrain the diamond wires. The distance between adjacent grooves is equal and parallel to each other, but they are not connected. The diamond wire is wound out from the left wire collection wheel, and returns to the right wire collection wheel through the grinding wheel, and is arranged in space to form a diamond wire belt. The diamond wire belt rotates at high speed driven by the rotation of the collection wheel and the pressure grinding wheel. The pressure grinding wheel exerts a certain pressure on the diamond wire belt to make it contact with the working surface and generate relative friction for grinding. When the wire gathering wheel and the pressure grinding wheel move forward for a certain distance, they will decelerate, stop, and run reversely for a certain distance. When running in the reverse direction, the diamond wire is wound out from the right wire collecting wheel, passes through the grinding wheel and returns to the left wire collecting wheel. The spatial arrangement of the wire gathering wheel and the pressure grinding wheel can be designed according to actual needs. Below the diamond wire belt is a workbench for fixing the workpiece to realize feeding. The invention adopts the special grinding tool of diamond wire belt. Compared with the traditional grinding wheel grinding and abrasive belt grinding, the heat of the processing surface is low, and the grinding debris is not easy to block the tool. It can realize high-speed, heavy-duty and ultra-wide processing. It has broad application prospects for grinding planes, outer circles, stepped shafts, etc.

As shown in Fig. 1, Fig. 2 and Fig. 3, a kind of contact type wire belt grinding processing device of the present invention includes a support unit arranged on the front side of the bed 1 for supporting and moving the workpiece to be ground, and An inverted triangular bracket 23 fixed on the support unit and fixed on the front side of the bed 1 is provided, a grinding mechanism for grinding workpieces to be ground, and a grinding mechanism arranged on the front side of the bed 1 for grinding The cooling mechanism for cooling the grinding mechanism, the support unit includes a vertical movement mechanism for driving the workpiece to be ground to move vertically on the coolant recovery tank 5 of the cooling mechanism, and a vertical movement mechanism arranged on the vertical movement The horizontal movement mechanism on the mechanism is used to drive the workpiece to be ground to move horizontally. The grinding mechanism includes a diamond wire belt 22 composed of several independent diamond wires 12 spatially arranged and arranged on an inverted triangular support 23. A take-up and release mechanism for supporting and driving the diamond wire belt 22 to grind the workpiece to be ground.

The vertical movement mechanism includes a workbench 10 and two vertical motors 9 arranged diagonally on the front and rear sides of the coolant recovery tank 5 respectively, and the output shafts of the two vertical motors 9 A vertical lead screw 8 is respectively connected to the top, and the corresponding two vertical lead screws 8 on the workbench 10 are formed with internal threads, and are threadedly connected with the two vertical lead screws 8 through the internal threads, The front and rear sides of the coolant recovery tank 5 are also diagonally provided with a guide post 7 that runs through the workbench 10, and each of the guide posts 7 is located on the same side of the coolant recovery tank 5. The vertical leading screw 8 on the limit is arranged side by side and in parallel.

Described horizontal moving mechanism comprises two guide rails 6 that are arranged in parallel on the workbench 10 in vertical moving mechanism along the front-back direction, is installed on described two guide rails 6 and can move back and forth along described two guide rails 6 Slider 11, described slider 11 is connected with horizontal lead screw 15 through the inner thread that is formed in the front and rear of middle part, and the front end of described horizontal lead screw 15 is connected with the horizontal motor 16 that is arranged on the front side of described workbench 10 , the rear end of the horizontal lead screw 15 is arranged on the rear side of the workbench 10 through a bearing.

As shown in Figure 4, the inverted triangular support 23 includes: inverted triangular side frames 231, three of which are integrally connected to the three corners of the inverted triangular side frames 231 and have the same structure for supporting the take-up and release mechanism. The bearing ring 232, and one end is connected to the inverted triangle side frame 231, and the other end is connected to the three fixing frames 233 on the front side of the bed 1. The three fixing frames 233 have the same structure and are all L-shaped structures, wherein , the long sides of the three L-shaped structures are vertically connected to the middle of the three sides of the inverted triangular side frame 231, and the short sides of the three L-shaped structures are respectively fixed on the front side of the bed 1 by bolts.

As shown in Fig. 1, Fig. 2, Fig. 3, and Fig. 4, the described take-up and pay-off mechanism includes a left wire collection wheel 2, a right wire collection wheel 14 and a pressure grinding wheel 13, and the left wire collection wheel 2, the right collection wheel One end of the wire pulley 14 and the pressure grinding wheel 13 is connected respectively in the bearing ring 232 formed on the left end and the right end of the horizontal side of the inverted triangle side frame 231. The other ends are respectively connected to the front side of the bed 1 by bearings, and a left wire pulley motor is respectively arranged on the rear side of the bed 1 corresponding to the left wire pulley 2, the right wire pulley 14 and the pressure grinding wheel 13. 17. The right wire collecting wheel motor 18 and the pressure grinding wheel motor 19, the output shafts of the left wire collecting wheel motor 17, the right wire collecting wheel motor 18 and the pressure grinding wheel motor 19 respectively pass through the bed 1 and are arranged on the bed The left wire collection wheel 2 on the front side of the body 1, the right wire collection wheel 14 and the pressure grinding wheel 13 are connected, one end of the diamond wire 12 is wound on the left wire collection wheel 2, and the other end is wound to the right wire collection wheel through the pressure grinding wheel 13 On the wheel 14, that is, the diamond wire 12 is wound out from the left wire collecting wheel 2 and returns to the right wire collecting wheel 14 through the pressure grinding wheel 13. The pressure grinding wheel 13 presses on the diamond wire belt 22 formed by the diamond wire 12, so that the diamond wire belt 22 contacts and rubs against the workpiece surface.

Nearly a hundred diamond wires 12 are arranged in parallel under the tension of the left wire collecting wheel 2, the right wire collecting wheel 14 and the pressure grinding wheel 13, forming wire belts in space. The width of the tape varies from 20mm to 100mm. A certain distance is left between the diamond wires, and the distance is preferably 1/2 of the diameter of the diamond wires. The diamond wires in each groove on the hub are independent and not connected to each other. The diamond wires on the wire collection wheel are superimposed on each other, and the tension is provided by the friction between the wires and the end of the wire is fixed on the surface of the wire collection wheel to ensure that the diamond wire can be tensioned during processing.

During the grinding process, for every forward rotation distance l ₁ of the diamond wire, the left wire collecting wheel 2, the right wire collecting wheel 14 and the pressure grinding wheel 13 will decelerate, stop, and reversely rotate the distance l ₂ , and the relationship between the two must satisfy l ₁ >l ₂ , the difference between the two is the advancing distance of the small loop line for one processing. The specific values of l ₁ and l ₂ are determined according to the actual processing conditions. The principle is to quit processing after the diamond wire is fully used and fails.

Grooves for guiding the diamond wire 12 are respectively formed on the outer surfaces of the left wire collection wheel 2, the right wire collection wheel 14, and the pressure grinding wheel 13. The number of grooves on the outer surfaces of the wire collecting wheel 14 and the pressure grinding wheel 13 is equal and arranged in parallel with each other at equal intervals, and each groove has a separate diamond wire 12 .

As shown in Figure 5, the grooves formed on the outer surfaces of the left wire collector 2 and the right wire collector 14 are U-shaped grooves 20 formed parallel to each other and equally spaced for winding a certain amount of diamond wire, The diamond wire 12 is integrally embedded in the U-shaped groove 20 .

As shown in Figure 6, the grooves formed on the outer surface of the pressure grinding wheel 13 are V-shaped grooves 21 formed parallel to each other and equally spaced, and the diamond wires 12 are half embedded in the V-shaped grooves 21 .

In actual use, if the groove depth of the groove of the pressure grinding wheel 13 is too shallow, the opening of the groove will be small, and the difficulty of diamond wire wiring will increase. At the same time, the embedding depth of the diamond wire will be insufficient. In the process of high-speed operation, the diamond wire is prone to skip wires, which will cause adverse effects on the grinding effect. However, when the groove depth is too deep, the requirements for the precision of the grooving process of the grinding wheel will be increased, and the time required for grooving will be lengthened; in addition, the groove depth will weaken the groove wall strength of the wire groove, and the groove wall will be weakened during use. The wear of the diamond wire is faster and the service life is shortened; if the groove depth is too deep, the number of grooves allowed by the pressure grinding wheel will be reduced, resulting in an increase in the use cost of the pressure grinding wheel. Therefore, the groove depth of the V-shaped groove 21 has an important influence on the groove processing accuracy of the press grinding wheel, the difficulty of wiring, the fixing accuracy of the steel wire, etc., and the appropriate groove depth should be selected according to the actual situation.

The shape of the grooves on the outer surfaces of the left wire collection wheel 2, the right wire collection wheel 14 and the pressure grinding wheel 13 of the present invention can also be that the outer surfaces of the left wire collection wheel 2 and the right wire collection wheel 14 are respectively formed with U-shaped grooves 20 parallel to each other and equally spaced for winding a certain amount of diamond wire, the outer surface of the pressure grinding wheel 13 is a smooth structure, and the above-mentioned formation is formed on the left wire collection wheel 2 and the right wire collection wheel The number of U-shaped grooves 20 on the outer surface of 14 is equal and arranged in parallel with each other at equal intervals. The diamond wire 12 is completely embedded in the U-shaped grooves 20 .

In order to reduce the impact of grinding heat on the burnt surface of the machined surface, the cooling mechanism specifically includes a coolant recovery tank 5 with the rear side fixed on the front side of the bed 1 and two L-shaped coolant guides 4, The bottom ends of the vertical parts of the two L-shaped cooling liquid guides 4 form a liquid inlet and are connected to the liquid outlet of the cooling liquid recovery tank 5, and the liquid outlet of the cooling liquid recovery tank 5 is provided with an outlet Liquid pump, the horizontal parts of the two L-shaped cooling liquid guides 4 are respectively located on both sides of the grinding wheel 13 in the inverted triangular bracket 23, and are arranged in parallel with the grinding wheel 13, and the L-shaped cooling liquid guides 4 The end of the horizontal portion constitutes a nozzle 3 for spraying cooling liquid onto the diamond wire belt 22 formed by the diamond wire 12 . By spraying the coolant onto the diamond wire belt 22 to exchange heat with the diamond wire, the surface temperature of the diamond wire and the workpiece is reduced. The length of the nozzle should be consistent with the length of the pressure grinding wheel, and a series of small holes are opened on the side close to the diamond wire to allow the coolant to flow out. The coolant has three main functions: one is cooling; the other is lubrication; the third is flushing.

Claims (7)

1. A contact-type wire belt grinding device, including a support unit arranged on the front side of the bed (1) for supporting and moving the workpiece to be ground, characterized in that, there is also a support unit located on the support unit and The inverted triangular support (23) fixed on the front side of the bed (1), the grinding mechanism for grinding the workpiece to be ground, and the grinding mechanism arranged on the front side of the bed (1) for grinding The cooling mechanism for the mechanism to cool down, the support unit includes a vertical movement mechanism set on the cooling liquid recovery tank (5) of the cooling mechanism for driving the workpiece to be ground to move vertically, and a vertical movement mechanism set on the vertical The horizontal moving mechanism on the moving mechanism is used to drive the workpiece to be ground to move horizontally. The grinding mechanism includes a diamond wire belt (22) composed of several independent diamond wires (12) arranged in space and arranged on The take-up and release mechanism on the inverted triangle support (23) is used to support and drive the diamond wire belt (22) to grind the workpiece to be ground; The horizontal movement mechanism includes two guide rails (6) arranged in parallel on the worktable (10) of the vertical movement mechanism along the front and rear directions, installed on the two guide rails (6) and capable of moving along the two guide rails (6). The sliding block (11) used to place the workpiece to be ground is moved back and forth by the bar guide rail (6). The sliding block (11) is connected with a horizontal lead screw (15) through the internal thread formed in the middle. The front end of the horizontal lead screw (15) is connected to the horizontal motor (16) arranged on the front side of the worktable (10), and the rear end of the horizontal lead screw (15) is arranged on the workbench (10) through a bearing. ) on the rear side; The inverted triangular bracket (23) includes: inverted triangular side frames (231), three of which are integrally connected to the three corners of the inverted triangular side frame (231) and are used to support the take-up and release mechanism The bearing ring (232), and one end is connected to the inverted triangular side frame (231), and the other end is connected to the three fixing frames (233) on the front side of the bed (1), and the three fixing frames (233) The structures are the same, all of which are L-shaped structures, wherein the long sides of the three L-shaped structures are vertically connected to the middle of the three sides of the inverted triangular side frame (231), and the short sides of the three L-shaped structures are respectively fixed to the respective sides by bolts. on the front side of the bed (1); The take-up and pay-off mechanism includes a left wire collection wheel (2), a right wire collection wheel (14) and a pressure grinding wheel (13), and the left wire collection wheel (2), right wire collection wheel (14) and pressure grinding wheel One end of the grinding wheel (13) is respectively connected to the bearing ring (232) formed on the three corners of the inverted triangle side frame (231), the left wire collection wheel (2), the right wire collection wheel (14) and The other ends of the pressure grinding wheels (13) are respectively connected to the front side of the bed (1) through bearings, and the rear side of the bed (1) corresponds to the left wire collection wheel (2) and the right wire collection wheel (14) ) and the pressure grinding wheel (13) are respectively provided with a left wire collection motor (17), a right wire collection motor (18) and a pressure grinding wheel motor (19), and the left wire collection motor (17), the right wire collection The output shafts of the wheel motor (18) and the grinding wheel motor (19) run through the bed (1) and the left wire pulley (2) and the right wire pulley arranged on the front side of the bed (1) respectively. (14) is connected with the pressure grinding wheel (13), one end of the diamond wire (12) is wound on the left wire collection wheel (2), and the other end is wound on the right wire collection wheel (14) through the pressure grinding wheel (13), The grinding wheel (13) presses on the diamond wire belt (22) formed by the diamond wire (12), so that the diamond wire belt (22) contacts and rubs against the workpiece surface. 2. A contact-type wire belt grinding device according to claim 1, characterized in that, the vertical movement mechanism includes a working table (10) and diagonally arranged cooling liquid Two vertical motors (9) on the front and rear sides of the recovery tank (5), the output shafts of the two vertical motors (9) are respectively connected to a vertical lead screw (8), and the workbench (10) Corresponding to the two vertical lead screws (8), there are internal threads formed on the top, and the two vertical lead screws (8) are threaded through the internal threads, and the coolant recovery tank (5) front and rear A guide post (7) that runs through the workbench (10) is also arranged diagonally on the two sides, and each guide post (7) is located on the same side as the coolant recovery tank (5) The vertical leading screw (8) on the limit is arranged side by side and in parallel. 3. A contact-type wire belt grinding device according to claim 1, characterized in that the outer surfaces of the left wire collection wheel (2), the right wire collection wheel (14) and the pressure grinding wheel (13) are Grooves for guiding the diamond wire (12) are respectively formed on the surface, and grooves formed on the outer surfaces of the left wire collection wheel (2), the right wire collection wheel (14) and the pressure grinding wheel (13) The number of grooves is equal and arranged in parallel with each other at equal intervals. 4. A contact type wire belt grinding device according to claim 1, characterized in that the grooves formed on the outer surfaces of the left wire pulley (2) and the right wire pulley (14) are U-shaped grooves (20) for winding a certain amount of diamond wire formed parallel to each other and equidistant. 5. A contact-type wire belt grinding device according to claim 1, characterized in that the grooves formed on the outer surface of the pressure grinding wheel (13) are V-shaped concave grooves formed parallel to each other and equally spaced. groove (21), the diamond wire (12) is half-embedded in the V-shaped groove (21). 6. A contact type wire belt grinding device according to claim 1, characterized in that, the outer surfaces of the left wire collection pulley (2) and the right wire collection pulley (14) are respectively formed with mutual Parallel and equally spaced U-shaped grooves (20) for winding a certain amount of diamond wire, the outer surface of the pressure grinding wheel (13) is a smooth structure, and the above-mentioned is formed on the left wire gathering wheel (2) The number of U-shaped grooves (20) on the outer surface of the right hub wheel (14) is equal and arranged in parallel with each other at equal intervals. The diamond wire (12) is completely embedded in the U-shaped grooves (20) Inside. 7. A contact type wire belt grinding device according to claim 1, characterized in that the cooling mechanism includes a cooling liquid recovery tank whose rear side is fixed on the front side of the bed (1) (5) and two L-shaped coolant guides (4), the bottom ends of the vertical parts of the two L-shaped coolant guides (4) constitute the liquid inlet and the outlet of the coolant recovery tank (5) The liquid ports are connected, the liquid outlet of the cooling liquid recovery tank (5) is provided with a liquid pump, and the horizontal parts of the two L-shaped cooling liquid guides (4) are respectively located in the inverted triangular brackets (23) The two sides of the pressure grinding wheel (13) are arranged parallel to the pressure grinding wheel (13). The end of the horizontal part of the L-shaped coolant guide (4) constitutes a diamond wire belt (22) composed of diamond wires. Nozzles (3) for spraying coolant.

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