Single-wire cutting device with swinging cutting wheel and cutting process

Abstract

The present invention discloses a single-wire cutting device with a swinging cutting wheel and a cutting process. The single-wire cutting device is used, and the cutting process is as follows: the left cutting wheel and the right cutting wheel move from top to bottom, and the cutting section of the cutting line cuts the workpiece; during the cutting process, the left cutting wheel and the right cutting wheel can also float up and down, and the cutting section of the cutting line produces an up and down tilting and swinging. During the cutting process of the present invention, the left and right cutting wheels can produce an up and down deflection, so that the cutting line can produce an inclination and swing relative to the workpiece. After the inclination and swing, the cutting line at the cutting position will not completely fit the workpiece, but can be partially contacted with the cutting position of the workpiece for cutting, which can reduce the cutting contact surface, reduce the cutting load, improve the cutting stability of the current cutting state, and maintain the accuracy of the wire cutting. The up and down swinging action of the cutting wheel can avoid the problem of excessive cutting load caused by the formation of an arc surface between the cutting line and the workpiece, and the reduction of cutting stability and cutting accuracy.

Description

Technical Field

[0001] The present invention relates to cutting equipment, and more specifically, to a single-wire cutting process with a swinging cutting wheel, and also to a single-wire cutting device with a swinging cutting wheel adopting the cutting process. Background Art

[0002] At present, the wire cutting equipment usually has two cutting wheels at the cutting position to limit the cutting line and keep the cutting line straight, usually in a horizontal state. When cutting, the two cutting wheels move together and feed in the direction of the workpiece. The cutting line between the two cutting wheels will be embedded in the workpiece, and the workpiece will be cut by wire. Figure 2 shown.

[0003] When the width of the workpiece is large, the cutting line cuts into the workpiece, the length of the cutting position formed will also increase, the cutting contact area between the cutting line and the workpiece will increase, and the cutting load will also increase. In addition, during the cutting process, there is a certain pressure between the cutting line and the workpiece, and the cutting line will produce a small arc deformation. Figure 3 As shown, this will cause the contact area between the cutting line and the workpiece to further increase during the cutting process, and the cutting load to further increase, which may lead to excessive cutting load, making it difficult to maintain cutting stability, and also cause problems such as reduced cutting accuracy. Therefore, the current cutting method is difficult to process workpieces with a larger width and cannot meet the processing needs of large-width workpieces.

[0004] Therefore, a new solution needs to be proposed to solve this problem. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art and to provide a single-wire cutting device with a swinging cutting wheel and a cutting process.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] A single-wire cutting process with a swinging cutting wheel, using a single-wire cutting device, the single-wire cutting device comprising a left cutting wheel, a right cutting wheel and a cutting wire, the cutting wire passing through the left cutting wheel and the right cutting wheel, and forming a cutting section at a position between the left cutting wheel and the right cutting wheel;

[0008] The cutting process is that the left cutting wheel and the right cutting wheel move from top to bottom, and the cutting section of the cutting line cuts the workpiece;

[0009] During the cutting process, the left cutting wheel and the right cutting wheel float up and down relatively, the cutting section of the cutting line tilts up and down, and the inclined cutting line cuts the workpiece.

[0010] The present invention is further configured such that the tilting and swinging angle of the cutting section is a, -7°≤a≤7°.

[0011] The present invention is further configured such that, during the cutting process, the left cutting wheel and the right cutting wheel float up and down according to a period T, and within the complete period T, the total descent amount of the left cutting wheel and the right cutting wheel is the same.

[0012] The present invention is further configured such that within a complete cycle T, the right cutting wheel first moves downward by an amount h advance, and then moves upward by an amount h retreat; the left cutting wheel first moves upward by an amount h retreat, and then moves downward by an amount h advance; h advance ≥ h retreat.

[0013] The present invention is further configured such that, within a complete cycle T, if the right cutting wheel completes a downward h-forward movement at the current time point, the right cutting wheel will subsequently move upward h-backward; when the right cutting wheel completes the upward h-backward movement, the left cutting wheel completes the h-forward movement and moves to the height of the right cutting wheel at the current time point.

[0014] The present invention is further configured such that the left cutting wheel and the right cutting wheel have the same motion cycle when they move downward h forward and upward h backward, which is half of the complete cycle T;

[0015] The distance between the left cutting wheel and the right cutting wheel is L, tan a = h / L;

[0016] The speed of the left and right cutting wheels when they move downward is V wheel, 0.5T = h wheel / V wheel;

[0017] The cutting feed speed of the cutting section of the cutting line is Vcut, where Vcut=(hforward-hbackward) / T.

[0018] The present invention is further configured such that, at the starting position of the cutting process, the heights of the left cutting wheel and the right cutting wheel are consistent, the cutting section of the cutting line is horizontal, and the cutting section of the cutting line horizontally touches the workpiece without entering the workpiece for cutting;

[0019] The cutting process includes an initial stage and a constant stage. In the initial stage, the cutting line has a cutting segment with an inclination angle of a initial and a downward movement amount of h initial.

[0020] In the constant stage, the angle of inclination and deflection of the cutting section of the cutting line is constant at a, and the downward movement amount is constant at h;

[0021] ainitial < aconstant, hinitial < hconstant.

[0022] The present invention is further configured such that the cutting depth of the cutting section is S. When S < h_in is constant, the cutting process is in the initial stage, a = a_initial, h_in = h_in_initial, and a_initial = a_constant × S / h_in_constant.

[0023] The present invention is further configured such that when S ≥ h_in is constant, the cutting process is in the constant stage, a = a_constant, and h_in = h_in_constant.

[0024] The present invention also provides a single-wire cutting device with a swinging cutting wheel, including a left cutting wheel, a right cutting wheel, and a cutting wire. The cutting wire winds around the left cutting wheel and the right cutting wheel, and a cutting section is formed at the position between the left cutting wheel and the right cutting wheel. Using the single-wire cutting process with a swinging cutting wheel as described above for cutting, the cutting wire will be inclined relative to the workpiece. During inclined cutting, the contact position between the inclined cutting wire and the workpiece is close to a point contact, which can reduce the cutting contact surface, lower the cutting load, and ensure the cutting accuracy.

[0025] In summary, the present invention has the following beneficial effects:

[0026] During the cutting process, the left and right cutting wheels can generate a swinging motion in the up and down directions, so that the cutting wire bypassing the two cutting wheels can be inclined and swing relative to the workpiece. After the inclined swing, the cutting wire at the cutting position will not completely fit the workpiece, but can locally contact the cutting position of the workpiece for cutting, which can reduce the cutting contact surface, lower the cutting load, improve the cutting stability of the current cutting state, and maintain the accuracy of wire cutting. By using the up and down swinging action of the cutting wheel, the problem of excessive cutting load, decreased cutting stability, and decreased cutting accuracy caused by the formation of an arc surface between the cutting wire and the workpiece can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a perspective view of a single-wire cutting device with a swinging cutting wheel in this embodiment;

[0028] Figure 2 is an ideal schematic diagram of the cutting wire and the workpiece during cutting in the prior art;

[0029] Figure 3 is an actual schematic diagram of the cutting wire and the workpiece during cutting in the prior art;

[0030] Figure 4 is a schematic diagram when the right cutting wheel feeds in this embodiment Figure 1 ;

[0031] Figure 5 is a schematic diagram when the right cutting wheel feeds in this embodiment Figure 2 ;

[0032] Figure 6 is a schematic diagram when the left cutting wheel feeds in this embodiment Figure 1 ;

[0033] Figure 7 This is a diagram showing the left cutting wheel feeding in this embodiment. Figure 2 ;

[0034] Figure 8 is a motion state diagram of the left cutting wheel and the right cutting wheel in this embodiment;

[0035] Fig. 9 Schematic diagram of the structure of the wheelbase and inclination angle a of the left cutting wheel and the right cutting wheel in this embodiment;

[0036] Fig.10 This is a schematic diagram of the initial position of the cutting line after the tool is set in this embodiment;

[0037] Fig.11 is a schematic diagram of the initial stage of the cutting process in this embodiment;

[0038] Fig.12 Schematic diagram of the final stage of the cutting process in this embodiment.

[0039] Reference numerals: left cutting wheel 1 ; right cutting wheel 2 ; cutting line 3 ; cutting section 31 ; workpiece 4 . DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] The present embodiment discloses a single-wire cutting process with a swinging cutting wheel, which uses a single-wire cutting device. The single-wire cutting device includes a left cutting wheel 1, a right cutting wheel 2 and a cutting wire 3. The cutting wire 3 passes through the left cutting wheel 1 and the right cutting wheel 2, and forms a cutting section 31 at a position between the left cutting wheel 1 and the right cutting wheel 2.

[0042] The left cutting wheel 1 and the right cutting wheel 2 are respectively installed on the wheel seat and the right wheel seat. The wheel seats can be independently raised and lowered and adjusted, and can press down the cutting line to achieve wire cutting of the workpiece.

[0043] The cutting process is as follows: the left cutting wheel 1 and the right cutting wheel 2 move from top to bottom, and the cutting section 31 of the cutting line 3 is embedded in the workpiece to cut the workpiece.

[0044] At the starting position of the cutting process, the heights of the left cutting wheel 1 and the right cutting wheel 2 are consistent, the cutting section 31 of the cutting line is horizontal, and the cutting section 31 of the cutting line 3 horizontally touches the workpiece without entering the workpiece for cutting.

[0045] Reference Figure 4-Figure 7 As shown, during the cutting process, the left cutting wheel 1 and the right cutting wheel 2 can also float up and down, and the cutting section of the cutting line 3 produces an up and down tilt and swing. The tilt and swing angle of the cutting section is a, and generally, -7°≤a≤7°, so that the cutting section 31 of the cutting line 3 is maintained within an appropriate range.

[0046] Reference Figure 4-Figure 7 As shown, during inclined cutting, the contact position between the inclined cutting line and the workpiece is close to a point contact, which can reduce the contact surface of the cutting, reduce the cutting load, and ensure the cutting accuracy.

[0047] During the cutting process, the left cutting wheel and the right cutting wheel float up and down according to a period T. Within the complete period T, the total descent amount of the left cutting wheel and the right cutting wheel is the same, so that the left cutting wheel and the right cutting wheel can maintain a roughly similar height, and from the overall movement, the left and right cutting wheels can form a stable descending motion.

[0048] Reference Figure 8 As shown in the figure, in a complete cycle T, the right cutting wheel first moves downward, the downward movement amount is h forward, and then moves upward, the upward movement amount is h backward; the left cutting wheel first moves upward, the upward movement amount is h backward, and then moves downward, the downward movement amount is h forward. h forward ≥ h backward, ensuring that the cutting wheel can have a cutting displacement in the feed direction after completing a cycle of movement, and can perform cutting operations on the workpiece.

[0049] In a complete cycle T, if the right cutting wheel completes the downward h-forward movement at the current time point, the right cutting wheel will subsequently move upward h-backward; when the right cutting wheel completes the upward h-backward movement, the left cutting wheel completes the h-forward movement and moves to the height of the right cutting wheel at the current time point. The left cutting wheel and the right cutting wheel can produce mutual coordinated movement, thereby ensuring the consistency of the left and right cutting wheels during the material cutting process, forming continuous cutting of the workpiece.

[0050] When the left and right cutting wheels are in cutting motion, the moving speeds of the cutting wheels are different when they move downward and upward, but the cycles of the wheel advance and wheel retreat are the same. When the left and right cutting wheels are in downward h advance and upward h retreat, the movement cycle is the same, which is half of the complete cycle T.

[0051] Reference Fig. 9 As shown, with respect to the tilting and swinging angle a of the cutting section, the downward movement amount of the cutting wheel is h.

[0052] The distance between the left cutting wheel and the right cutting wheel is L, tan a = h / L.

[0053] Set the speed of the left and right cutting wheels when moving downward h forward to V wheel, 0.5T = h forward / V wheel.

[0054] Set the cutting feed speed of the cutting section of the cutting line to Vcut, Vcut = (h forward - h retreat) / T.

[0055] From the above formula, we can know that hforward = tan a × L; T = 2 × tan a × L / Vwheel, and then we can get the relationship between parameters such as hforward, hback, L, Vwheel, and tilt and yaw angle a.

[0056] Among them, the distance between the left cutting wheel and the right cutting wheel is L, which is determined by the mechanical structure of the cutting device. By determining the tilting and swinging angle a, the cutting feed speed Vcut and the cutting wheel feed movement speed Vwheel, the hin and hretract values ​​can be calculated, which determines the entire operation process of the left and right cutting wheels.

[0057] The tilting and swinging angle a and the cutting feed speed Vcut are related to the material and width of the cutting material itself, and can be set specifically according to the material of the workpiece to be cut, thereby ensuring stable and high-precision cutting of the workpiece. The harder the material to be cut, the longer the arc curve is required, that is, the greater the curvature, that is, the greater the swinging angle value a required. In general, when a is constant, the conventional value is ±7°.

[0058] At the initial position of cutting, the cutting line completes the tool setting, that is, the cutting line keeps descending roughly horizontally until the cutting line touches the workpiece to be cut. At this time, the cutting line does not cut into the workpiece to be cut, and the initial tool setting of cutting is realized. Fig.10 shown.

[0059] After the tool setting is completed, the cutting process begins. The cutting process includes the initial stage and the constant stage. In the initial stage, since the cutting line is cut into the workpiece, if the set swing angle value a and the normal cutting wheel feed are immediately used, the cutting line cannot move according to the preset trajectory and cannot immediately cut into the workpiece. Fig.11 As shown. In the initial stage, the swing angle value a needs to form a gradually increasing process. The initial contact is swung with a small tilt. After the cutting line is completely cut into the workpiece, a is gradually increased. After stabilization, stable and continuous cutting is performed at a constant tilt swing angle a.

[0060] According to Figure 8 In the first movement cycle, the movement amount of the right cutting wheel and the left cutting wheel is small, and in the subsequent movement cycles, the cutting operation is performed at a stable tilting and swinging angle a.

[0061] In the initial stage, the angle of the cutting section of the cutting line is a initial, and the downward movement is h initial. In the constant stage, the angle of the cutting section of the cutting line is a constant, and the downward movement is h constant.

[0062] Among them, ainitial <aconstant, hinitial <hconstant.

[0063] Set the cutting depth of the cutting section to S, that is, the depth of the cutting line into the workpiece.

[0064] When S < h-constant, the cutting process is in the initial stage, a = a-initial, h-in = h-initial, a-initial = a-constant × S / h-constant. When S ≥ h-constant, the cutting process is in the constant stage, a = a-constant, h-in = h-constant.

[0065] For different materials and cutting parameter requirements, the value of cutting depth S can be specifically set to meet the cutting accuracy and parameter requirements.

[0066] Furthermore, the cutting process also includes an ending stage. At the end, the tilting and swinging angle a is gradually adjusted to become smaller, and the originally swinging cutting line is gradually leveled, forming a change process opposite to the initial stage, which can ensure stable cutting. Fig.12 shown.

[0067] This embodiment also discloses a single-wire cutting device with a swinging cutting wheel, referring to Figure 1 As shown, it includes a left cutting wheel, a right cutting wheel and a cutting line. The cutting line passes through the left cutting wheel and the right cutting wheel, and forms a cutting section between the left cutting wheel and the right cutting wheel. When cutting is performed using the single-line cutting process with the cutting wheel swinging as described above, the cutting line will be tilted relative to the workpiece. During the tilted cutting, the contact position between the tilted cutting line and the workpiece is close to a point contact, which can reduce the contact surface of the cutting, reduce the cutting load, and ensure the cutting accuracy.

[0068] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A single-wire cutting process with a swinging cutting wheel, characterized in that a single-wire cutting device is adopted, and the single-wire cutting device includes a left cutting wheel, a right cutting wheel and a cutting wire. The cutting wire winds around the left cutting wheel and the right cutting wheel, and a cutting section is formed at the position between the left cutting wheel and the right cutting wheel; during the cutting process, the left cutting wheel and the right cutting wheel move downward from top to bottom, and the cutting section of the cutting wire cuts the workpiece; during the cutting process, the left cutting wheel and the right cutting wheel float relatively up and down, and the cutting section of the cutting wire generates an up-and-down inclined yaw, and the inclined cutting wire cuts the workpiece; during the cutting process, the left cutting wheel and the right cutting wheel float up and down according to a period T. Within a complete period T, the total downward displacement of the left cutting wheel and the right cutting wheel is the same; within a complete period T, the right cutting wheel first moves downward by an amount h_in, then moves upward by an amount h_retreat; the left cutting wheel first moves upward by an amount h_retreat, then moves downward by an amount h_in; h_in ≥ h_retreat; at the starting position of the cutting process, the heights of the left cutting wheel and the right cutting wheel are the same, the cutting section of the cutting wire is horizontal, and the cutting section of the cutting wire touches the workpiece horizontally and does not enter the workpiece for cutting; the cutting process includes an initial stage and a constant stage. In the initial stage, the inclination yaw angle of the cutting section of the cutting wire is a_initial, and the downward displacement is h_in_initial; in the constant stage, the inclination yaw angle of the cutting section of the cutting wire is a_constant, and the downward displacement is h_in_constant; a_initial < a_constant, h_in_initial < h_in_constant.

2. The single-wire cutting process with a swaying cutting wheel according to claim 1, characterized in that: The inclination yaw angle of the cutting section is a, -7° ≤ a ≤ 7°.

3. The single-wire cutting process with a swaying cutting wheel according to claim 1, characterized in that: within a complete period T, if the right cutting wheel has completed a downward movement of h_in at the current time point, the subsequent right cutting wheel will perform an upward movement of h_retreat; when the right cutting wheel has completed an upward movement of h_retreat, the left cutting wheel has completed a movement of h_in and moved to the height of the right cutting wheel at the current time point; 4. The single-wire cutting process with a swaying cutting wheel according to claim 1, characterized in that: when the left cutting wheel and the right cutting wheel move downward by h_in and upward by h_retreat, the movement periods are the same, which is half of the complete period T; the distance between the left cutting wheel and the right cutting wheel is L, and tan a = h_in / L; the speed of the left cutting wheel and the right cutting wheel when moving downward by h_in is V_wheel, and 0.5T = h_in / V_wheel; the cutting feed speed of the cutting section of the cutting wire is V_cut, and V_cut = (h_in - h_retreat) / T.

5. The single-wire cutting process with a swaying cutting wheel according to claim 1, characterized in that: the cutting depth of the cutting section is S. When S < h_in_constant, the cutting process is the initial stage, a = a_initial, h_in = h_in_initial, and a_initial = a_constant × S / h_in_constant.

6. The single-wire cutting process with a swaying cutting wheel according to claim 5, characterized in that: when S ≥ h_in_constant, the cutting process is the constant stage, a = a_constant, h_in = h_in_constant.

7. A single-wire cutting device with a swinging cutting wheel, characterized in that: including a left cutting wheel, a right cutting wheel and a cutting wire. The cutting wire winds around the left cutting wheel and the right cutting wheel, and a cutting section is formed at the position between the left cutting wheel and the right cutting wheel; adopt the single-wire cutting process with a swinging cutting wheel as described in any one of claims 1-6.

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