Swing arm type cucurbita moschata dicing head mechanism

Abstract

The utility model discloses a swing arm type cucurbita moschata dicing head mechanism which comprises a swing arm mechanism, a longitudinal cutting sliding table air cylinder mechanism, a horizontal cutting sliding table air cylinder mechanism and a cucurbita moschata fixing platform, and the longitudinal cutting sliding table air cylinder mechanism and the horizontal cutting sliding table air cylinder mechanism are arranged around the cucurbita moschata fixing platform. The cut-in distance and the cut-in angle of the two longitudinal cutters are adjustable, and the two horizontal cutters are matched with the cut-in angle and the horizontal dicing distance of the two longitudinal cutters; longitudinal dicing actions and horizontal dicing actions are oppositely arranged, so that the longitudinal dicing actions and the horizontal dicing actions can be simultaneously performed without mutual influence, the overall dicing efficiency is improved, the overall structure is simple and independent, the requirement for the manufacturing precision of parts is low, and the assembly manufacturability is good; the cutting-in action of the whole machine adopts an air cylinder to push a blade to cut in, the response speed is high, the operation is simple and convenient, the position where the blade feeding needs to be accurately controlled is controlled by a sliding table lead screw pair, and enough force is provided for dicing while the movement precision is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of food processing equipment, especially to a swing arm type hollow squash block cutting head mechanism. BACKGROUND

[0002] Hollow squash and pumpkin are actually different names for the same plant. They both belong to the Cucurbitaceae genus of annual vine herbaceous plants. The alternative names of pumpkin include wu gua, bangua, rice squash, bangua and beiguo.

[0003] The existing block cutting platform mechanism can only achieve the function of cutting hollow squash into pieces by using a radial integrated blade, and cannot achieve the fine cutting of hollow squash and the classification and collection of products and waste. The economic value of hollow squash is not high, and the profit margin of the transaction price in domestic sales is limited, so the corresponding production and processing equipment is difficult to update. However, the export of hollow squash as a high value-added product in the form of pre-prepared dishes greatly improves the economic value and profit margin of hollow squash, which enables more abundant funds to be invested in hollow squash related cutting equipment. In order to meet the latest market demand, the design of the latest block cutting platform aims to finely cut hollow squash into blocks and classify and collect different grades of products. SUMMARY

[0004] In view of the above-mentioned problems that the existing block cutting platform mechanism cannot finely cut hollow squash into blocks and the cutting size is not adjustable, the purpose of the utility model is to provide a swing arm type hollow squash block cutting head mechanism.

[0005] In order to achieve the above-mentioned purpose, the technical scheme adopted by the utility model is as follows:

[0006] A swing arm type hollow squash block cutting head mechanism, comprising: a swing arm mechanism 1, a longitudinal cutting sliding table cylinder mechanism 2, a horizontal cutting sliding table cylinder mechanism 3 and a pumpkin fixing platform 4, the longitudinal cutting sliding table cylinder mechanism 2 and the horizontal cutting sliding table cylinder mechanism 3 are arranged around the pumpkin fixing platform 4, the pumpkin fixing platform 4 is used for placing and fixing materials, the longitudinal cutting sliding table cylinder mechanism 2 is used for longitudinally cutting the materials, the horizontal cutting sliding table cylinder mechanism 3 is used for horizontally cutting the materials, and the longitudinal cutting sliding table cylinder mechanism 2 and the horizontal cutting sliding table cylinder mechanism 3 are respectively installed on one swing arm mechanism 1.

[0007] The swing arm type hollow squash block cutting head mechanism, wherein the swing arm mechanism 1 comprises: a fixed rack 1-1, an electric cylinder support 1-2 and a telescopic electric cylinder 1-3, two electric cylinder supports 1-2 are symmetrically installed on the fixed rack 1-1, and the two sides of the cylinder body of the telescopic electric cylinder 1-3 are respectively connected with the two electric cylinder supports 1-2.

[0008] The swing arm type melon cutting head mechanism, wherein the two electric cylinder supports 1-2 are located on the same horizontal plane.

[0009] The swing arm type melon cutting head mechanism, wherein the fixed frame 1-1 comprises a horizontal mounting plate and a vertical mounting plate, and the bottom edge of the vertical mounting plate is connected to the horizontal mounting plate.

[0010] The swing arm type melon cutting head mechanism, wherein each electric cylinder support 1-2 and the vertical mounting plate are connected by at least two screws.

[0011] The swing arm type melon cutting head mechanism, wherein the fixed frame 1-1 further comprises a hinge mounting plate, the hinge mounting plate is mounted on the vertical mounting plate, and the two electric cylinder supports 1-2 are arranged below the hinge mounting plate.

[0012] The swing arm type melon cutting head mechanism, wherein it further comprises a swing arm hinge 1-4, a swing arm 1-5, and a strip-shaped connecting plate, a plurality of swing arms 1-5 are parallel to each other, the upper end of each swing arm 1-5 is rotationally connected to the hinge mounting plate through a swing arm hinge 1-4, and the lower end of each swing arm 1-5 is connected to the strip-shaped connecting plate.

[0013] The swing arm type melon cutting head mechanism, wherein the cylinder rod end of the telescopic electric cylinder 1-3 is rotationally connected to the lower surface of the strip-shaped connecting plate, and the upper surface of the strip-shaped connecting plate is used to mount a longitudinal cutting slide cylinder mechanism 2 or a horizontal cutting slide cylinder mechanism 3.

[0014] The swing arm type melon cutting head mechanism, wherein the longitudinal cutting slide cylinder mechanism 2 comprises a first driving device, a first screw rod slide, a first double rod cylinder, a longitudinal cutting knife holder, and a longitudinal cutting knife blade, the first screw rod slide is mounted on the upper surface of the strip-shaped connecting plate of one swing arm mechanism 1, two first double rod cylinders are symmetrically arranged, the cylinder body of each first double rod cylinder is mounted on a sliding block of the first screw rod slide, each longitudinal cutting knife holder is mounted on the cylinder rod end of one first double rod cylinder, one longitudinal cutting knife blade is mounted on each longitudinal cutting knife holder, and two longitudinal cutting knife blades are symmetrically arranged on the left and right sides, and the first driving device is used to drive the cylinder bodies of the two first double rod cylinders to displace along the first screw rod slide, thereby adjusting the distance between the two longitudinal cutting knife blades.

[0015] The swing arm type melon cutting head mechanism has the positive effects that, compared with the prior art, the swing arm type melon cutting head mechanism has the following advantages:

[0016] The utility model discloses have adopted above -mentioned technology, make it with prior art compared with the positive effect that has is:

[0017] (1) the utility model discloses adopt open type design, and the whole structure is simple and independent, and the manufacturing precision requirement of part is low, and the assembly technology is good, the required horizontal and longitudinal four knives in cutting are divided into two groups, and the longitudinal two knives cut into interval and cut into angle realization adjustable, and horizontal two knives cooperate the cut -in angle and horizontal cutting distance of longitudinal two knives, the cutting action of longitudinal and horizontal is arranged oppositely, makes two simultaneously in the case where can not influence each other, improves the cutting efficiency of whole.

[0018] (2) in the utility model discloses, the whole machine cut -in action all adopts the cylinder to push the blade and cut into, and the response speed is fast, and the operation is simple, adopts the slide table screw pair control in the position that needs accurate control blade feed, guarantees the movement precision simultaneously, provides enough force for cutting. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the overall structure shaft side view of a swing arm type melon cutting head mechanism of the utility model.

[0020] Figure 2 It is the two main slide cylinder mechanism plan view of a swing arm type melon cutting head mechanism of the utility model.

[0021] Figure 3 It is the complete cutting knife mark schematic view of a swing arm type melon cutting head mechanism of the utility model.

[0022] Figure 4 And Figure 5 It is the finished small piece schematic view of a swing arm type melon cutting head mechanism of the utility model.

[0023] Figure 6 It is the finished small piece position schematic view in pumpkin of a swing arm type melon cutting head mechanism of the utility model.

[0024] Figure 7It is the finished small block of the arm swing type pumpkin cutting head mechanism in the internal position schematic view of the pumpkin.

[0025] In the drawing: 1, swing arm mechanism; 2, longitudinal cutting sliding table cylinder mechanism; 3, flat cutting sliding table cylinder mechanism; 4, pumpkin fixing platform; 1-1, fixed rack; 1-2, electric cylinder support; 1-3, telescopic electric cylinder; 1-4, swing arm hinge; 1-5, swing arm; 3-1, second driving device; 3-2, second lead screw sliding table; 3-3, second double rod cylinder; 3-4, flat cutting knife holder; 3-5, flat cutting blade. DETAILED DESCRIPTION

[0026] The utility model makes further explanation in connection with the drawing and specific embodiment, but not as the limitation of the utility model.

[0027] Please refer to Figures 1 to 6 It shows an arm swing type pumpkin cutting head mechanism, wherein, it includes: swing arm mechanism 1, longitudinal cutting sliding table cylinder mechanism 2, flat cutting sliding table cylinder mechanism 3 and pumpkin fixing platform 4, longitudinal cutting sliding table cylinder mechanism 2 and flat cutting sliding table cylinder mechanism 3 are arranged around pumpkin fixing platform 4, pumpkin fixing platform 4 is used to place and fix material, longitudinal cutting sliding table cylinder mechanism 2 is used to cut material longitudinally, flat cutting sliding table cylinder mechanism 3 is used to cut material flatly, longitudinal cutting sliding table cylinder mechanism 2 and flat cutting sliding table cylinder mechanism 3 are installed on a swing arm mechanism 1 respectively.

[0028] Further, in a preferred embodiment, swing arm mechanism 1 includes: fixed rack 1-1, electric cylinder support 1-2 and telescopic electric cylinder 1-3, two electric cylinder supports 1-2 are symmetrically installed on fixed rack 1-1, and the two sides of the cylinder body of telescopic electric cylinder 1-3 are respectively rotationally connected with two electric cylinder supports 1-2.

[0029] Further, in a preferred embodiment, two electric cylinder supports 1-2 are located in the same horizontal plane.

[0030] Further, in a preferred embodiment, fixed rack 1-1 includes: horizontal mounting plate and vertical mounting plate, and the bottom edge of vertical mounting plate is connected with horizontal mounting plate.

[0031] Further, in a preferred embodiment, each electric cylinder support 1-2 and vertical mounting plate are connected by at least two screws.

[0032] Further, in a preferred embodiment, fixed rack 1-1 further includes: hinge mounting plate, the hinge mounting plate is installed on the vertical mounting plate, and two electric cylinder supports 1-2 are both arranged below the hinge mounting plate.

[0033] Further, in a preferred embodiment, the arm hinge 1-4, the arm 1-5 and the strip-shaped connecting plate are further included, a plurality of arms 1-5 are parallel to each other, the upper end of each arm 1-5 is rotatably connected with the hinge mounting plate through an arm hinge 1-4, and the lower end of each arm 1-5 is connected with the strip-shaped connecting plate.

[0034] Further, in a preferred embodiment, the lower surface of the strip-shaped connecting plate is rotatably connected with the end of the cylinder rod of the telescopic cylinder 1-3, and the upper surface of the strip-shaped connecting plate is used for mounting the longitudinal cutting slide cylinder mechanism 2 or the flat cutting slide cylinder mechanism 3.

[0035] Further, in a preferred embodiment, the longitudinal cutting slide cylinder mechanism 2 includes the first driving device, the first screw slide, the first double-rod cylinder, the longitudinal cutting tool holder and the longitudinal cutting tool, the first screw slide is mounted on the upper surface of the strip-shaped connecting plate of an arm mechanism 1, two first double-rod cylinders are symmetrically arranged, the cylinder body of each first double-rod cylinder is mounted on a sliding block of the first screw slide, the cylinder rod end of each first double-rod cylinder is mounted with a longitudinal cutting tool holder, and each longitudinal cutting tool holder is mounted with a longitudinal cutting tool, the two longitudinal cutting tools are symmetrically arranged on the left and right, and the first driving device is used for driving the cylinder bodies of the two first double-rod cylinders to displace along the first screw slide, so as to adjust the distance between the two longitudinal cutting tools.

[0036] Further, in a preferred embodiment, the flat cutting slide cylinder mechanism 3 includes the second driving device 3-1, the second screw slide 3-2, the second double-rod cylinder 3-3, the flat cutting tool holder 3-4 and the flat cutting tool 3-5, the second screw slide 3-2 is mounted on the upper surface of the strip-shaped connecting plate of another arm mechanism 1, the cylinder body of the second double-rod cylinder 3-3 is mounted on the sliding block of the second screw slide 3-2, the flat cutting tool holder 3-4 is mounted on the cylinder rod end of the second double-rod cylinder, and two flat cutting tools 3-5 are symmetrically arranged on the upper and lower surfaces and are both mounted on the flat cutting tool holder 3-4, and the second driving device 3-1 is used for driving the two flat cutting tools 3-5 to displace synchronously along the second screw slide 3-2.

[0037] The above is only a preferred embodiment of the utility model, and does not limit the implementation mode and protection scope of the utility model.

[0038] The utility model further has the following implementation modes on the basis of the above:

[0039] In a further embodiment of the utility model, the purpose of the utility model is to provide an arm type melon cutting head mechanism, which is good in economy, low in precision requirement, good in assembly process, and realizes accurate control of the feed amount of each tool in the cutting process by using a plurality of screw pairs and cylinders.

[0040] The utility model discloses the advantages lie in: adopt open design, and the whole structure is simple and independent, and the manufacturing precision requirement of part is low, and assembly technology is good, the required horizontal and longitudinal four knives in the cutting block are divided into two groups, and the longitudinal two knives cut into interval and cut into angle realization adjustable, and the horizontal two knives cooperate with the cut-in angle and horizontal cutting block distance of longitudinal two knives, the longitudinal and horizontal cutting block action are arranged oppositely, so that two can carry out simultaneously under the condition of not influencing each other, improve the cutting block efficiency of whole, the cut-in action of whole machine adopts cylinder to push the blade to cut in, and the response speed is fast, and the operation is simple, adopts slide table screw pair control in the position that needs accurate control blade feeding, guarantees the movement precision, and provides enough force for cutting block, realizes energy -conserving and environment -friendly function when whole action realizes the demand of whole action efficiently, simultaneously, in the utility model, the action requirement can be realized by medium pressure 0.6MPa, and the whole machine safety is high, and maintenance and spare part replacement are simple.

[0041] In a further embodiment of the utility model, as shown in Figure 1 The utility model discloses the advantages lie in: adopt open design, and the whole structure is simple and independent, and the manufacturing precision requirement of part is low, and assembly technology is good, the required horizontal and longitudinal four knives in the cutting block are divided into two groups, and the longitudinal two knives cut into interval and cut into angle realization adjustable, and the horizontal two knives cooperate with the cut-in angle and horizontal cutting block distance of longitudinal two knives, the longitudinal and horizontal cutting block action are arranged oppositely, so that two can carry out simultaneously under the condition of not influencing each other, improve the cutting block efficiency of whole, the cut-in action of whole machine adopts cylinder to push the blade to cut in, and the response speed is fast, and the operation is simple, adopts slide table screw pair control in the position that needs accurate control blade feeding, guarantees the movement precision, and provides enough force for cutting block, realizes energy -conserving and environment -friendly function when whole action realizes the demand of whole action efficiently, simultaneously, in the utility model, the action requirement can be realized by medium pressure 0.6MPa, and the whole machine safety is high, and maintenance and spare part replacement are simple.

[0042] The utility model discloses the advantages lie in: adopt open design, and the whole structure is simple and independent, and the manufacturing precision requirement of part is low, and assembly technology is good, the required horizontal and longitudinal four knives in the cutting block are divided into two groups, and the longitudinal two knives cut into interval and cut into angle realization adjustable, and the horizontal two knives cooperate with the cut-in angle and horizontal cutting block distance of longitudinal two knives, the longitudinal and horizontal cutting block action are arranged oppositely, so that two can carry out simultaneously under the condition of not influencing each other, improve the cutting block efficiency of whole, the cut-in action of whole machine adopts cylinder to push the blade to cut in, and the response speed is fast, and the operation is simple, adopts slide table screw pair control in the position that needs accurate control blade feeding, guarantees the movement precision, and provides enough force for cutting block, realizes energy -conserving and environment -friendly function when whole action realizes the demand of whole action efficiently, simultaneously, in the utility model, the action requirement can be realized by medium pressure 0.6MPa, and the whole machine safety is high, and maintenance and spare part replacement are simple.

[0043] When the swing arm mechanism 1 swings downward, the pumpkin moves downward, and then the cutting of one circle inward can be carried out. Specifically, the electric cylinder 1-3 pushes the rod to retract, the swing arm 1-5 rotates around the hinge 1-4, the longitudinal cutting slide cylinder mechanism 2 or the horizontal cutting slide cylinder mechanism 3 is lowered, and the pumpkin is correspondingly lowered to a certain height. At this time, the cylinder is extended to start cutting, and then the part closer to the center of the pumpkin can be cut, and the utilization rate of the whole pumpkin is improved.

[0044] In a further embodiment of the utility model, the pumpkin fixing platform 4 is composed of a lifting platform, a rotating platform and two driving devices. The rotating platform is arranged on the lifting platform. One driving device is used to drive the lifting platform to lift up and down, and the other driving device is used to drive the rotating platform to rotate, so as to realize the lifting and rotating of the pumpkin.

[0045] In a further embodiment of the utility model, the lifting platform can be a scissor lift or a telescopic cylinder lift. According to the type of the equipment, a hydraulic driving device or a motor driving device is selected.

[0046] In a further embodiment of the utility model, the rotating platform includes a fixed disc and a rotating disc. The rotating disc is installed on the fixed disc through a rotating shaft. A variety of transmission mechanisms such as a gear transmission mechanism and a worm transmission mechanism can be selected inside the rotating disc. The transmission mechanism is driven to operate by the driving device, so that the rotating disc drives the pumpkin to rotate. The driving device can be a motor driving device.

[0047] In a further embodiment of the utility model, a plurality of vertical steel needles can be installed on the upper surface of the rotating disc. The plurality of steel needles are all inserted into the pumpkin, so that the pumpkin stably rotates with the rotating disc and is limited. The upper surface of the rotating disc can also be installed with other structures or cooperate with other structures to limit the pumpkin, so that the pumpkin stably rotates with the rotating disc.

[0048] In a further embodiment of the utility model, as shown in Figure 2 The relative position of the blade on the slide cylinder mechanism and the pumpkin is shown in the figure. The swing arm 1-5 is driven to rotate around the swing arm hinge 1-4 by the telescopic electric cylinder 1-3 to adjust the cutting angle of the blade on the pumpkin. Then the blade is cut into the pumpkin by inflating the cylinder. In the longitudinal cutting slide cylinder mechanism 2, the function is only to cut the pumpkin longitudinally, and then the cylinder is retracted. In the horizontal cutting slide cylinder mechanism 3, in addition to cutting the blade into the pumpkin, the blade also needs to be driven to move horizontally to cut the pumpkin horizontally, and then it is retracted.

[0049] In a further embodiment of the utility model, as shown in Figure 3The shown is a cutting knife mark demonstration diagram. Starting from the initial state, the first step is to cut into the pumpkin by extending the cylinders of the longitudinal cutting slide cylinder mechanism 2 and the horizontal cutting slide cylinder mechanism 3, which is a parallel longitudinal knife mark; then the cylinder of the longitudinal cutting slide cylinder mechanism 2 is directly retracted, and the horizontal cutting slide cylinder mechanism 3 is driven by the screw rod to perform horizontal cutting, which is a horizontal knife mark; then the cylinder of the horizontal cutting slide cylinder mechanism 3 is retracted, the horizontal cutting slide cylinder mechanism 3 is reset under the driving of the screw rod, then the pumpkin is turned through a certain angle, and the above-mentioned actions are repeated; when the pumpkin completes a whole circle, the required rotating cutting effect is as shown in the figure, and thus a desired square pumpkin piece is cut off Figure 4 and Figure 5 as shown.

[0050] In a further embodiment of the utility model, the swing arm type is a very common action connection mode in mechanical movement, and is very widely applied. In the current design requirements, the pumpkin can be cut into a square piece with a relatively standard shape, and the length and width of the cut piece can be controlled, so that the pumpkin piece meeting the specifications can be cut off when facing pumpkins of different sizes.

[0051] In a further embodiment of the utility model, before use, the structure of the utility model should be assembled, the distance between the two swing arm mechanisms should be adjusted to match the diameter of the pumpkin, and the cutting process should be ensured to be smooth; when in use, the assembled structure of the utility model should be calibrated and adjusted to the initial working position, and the rotation speed of the rotating platform on which the pumpkin is placed should be adjusted to adapt to the cutting rhythm.

[0052] The above is only the preferred embodiment of the utility model, and does not limit the implementation and protection scope of the utility model. For those skilled in the art, it should be realized that any equivalent replacement and obvious change obtained by applying the contents of the utility model specification and drawings should be included in the protection scope of the utility model.

Claims

1. A swing arm type melon cutting head mechanism, characterized by, The utility model relates to a kind of pumpkin cutting machine, including: swing arm mechanism (1), longitudinal cutting slide cylinder mechanism (2), flat cutting slide cylinder mechanism (3) and pumpkin fixing platform (4), longitudinal cutting slide cylinder mechanism (2) and flat cutting slide cylinder mechanism (3) are set around pumpkin fixing platform (4), the pumpkin fixing platform (4) is used to place and fix material, the longitudinal cutting slide cylinder mechanism (2) is used to cut material longitudinally, the flat cutting slide cylinder mechanism (3) is used to cut material flat, the longitudinal cutting slide cylinder mechanism (2) and the flat cutting slide cylinder mechanism (3) are installed on a swing arm mechanism (1) respectively. The swing arm mechanism (1) includes: fixed frame (1-1), cylinder support (1-2) and telescopic electric cylinder (1-3), two cylinder supports (1-2) are symmetrically installed on the fixed frame (1-1), and the two sides of the cylinder body of the telescopic electric cylinder (1-3) are rotatably connected with the two cylinder supports (1-2) respectively.

2. The swing arm type cantaloupe cuber head mechanism according to claim 1, characterized in that, The two cylinder supports (1-2) are located in the same horizontal plane.

3. The swing arm type cantaloupe cuber head mechanism of claim 2, wherein, The fixed frame (1-1) includes: a horizontal mounting plate and a vertical mounting plate, and the bottom edge of the vertical mounting plate is connected with the horizontal mounting plate.

4. The swing arm type cantaloupe cuber head mechanism of claim 2, wherein, Each cylinder support (1-2) and the vertical mounting plate are connected by at least two screws.

5. The swing arm type cantaloupe cuber head mechanism of claim 4, wherein, The fixed frame (1-1) further includes: a hinge mounting plate, the hinge mounting plate is installed on the vertical mounting plate, and the two cylinder supports (1-2) are located below the hinge mounting plate.

6. The swing arm type cantaloupe cuber head mechanism of claim 5, wherein, Further comprising:

7. The swing arm type cantaloupe cuber head mechanism of claim 6, wherein, swing arm hinge (1-4), swing arm (1-5) and strip-shaped connecting plate, a plurality of swing arms (1-5) are parallel to each other, the upper end of each swing arm (1-5) is rotatably connected with the hinge mounting plate through a swing arm hinge (1-4), and the lower end of each swing arm (1-5) is connected with the strip-shaped connecting plate. The rod end of the telescopic electric cylinder (1-3) is rotatably connected with the lower surface of the strip-shaped connecting plate, and the upper surface of the strip-shaped connecting plate is used for mounting the longitudinal cutting slide cylinder mechanism (2) or the flat cutting slide cylinder mechanism (3).

8. The swing arm type cantaloupe cuber head mechanism of claim 7, wherein, The longitudinal cutting slide cylinder mechanism (2) includes: a first driving device, a first screw rod slide, a first double-rod cylinder, a longitudinal cutting tool holder and a longitudinal cutting blade, the first screw rod slide is installed on the upper surface of the strip-shaped connecting plate of the swing arm mechanism (1), two first double-rod cylinders are symmetrically arranged, the cylinder body of each first double-rod cylinder is installed on a sliding block of the first screw rod slide, each longitudinal cutting tool holder is installed on the rod end of a first double-rod cylinder, one longitudinal cutting blade is installed on each longitudinal cutting tool holder, and two longitudinal cutting blades are symmetrically arranged on the left and right, and the first driving device is used to drive the cylinder body of the two first double-rod cylinders to displace along the first screw rod slide, so as to adjust the distance between the two longitudinal cutting blades.

9. The swing arm type cantaloupe cuber head mechanism of claim 8, wherein, ​ 10. The swing arm type cantaloupe cuber head mechanism of claim 9, wherein, The flat cutting sliding table cylinder mechanism (3) comprises a second driving device (3-1), a second screw sliding table (3-2), a second double-rod cylinder (3-3), a flat cutting tool holder (3-4) and flat cutting blades (3-5). The second screw sliding table (3-2) is installed on the upper surface of the strip-shaped connecting plate of the other swing arm mechanism (1). The cylinder body of the second double-rod cylinder (3-3) is installed on the sliding block of the second screw sliding table (3-2). The flat cutting tool holder (3-4) is installed on the end of the cylinder rod of the second double-rod cylinder. Two flat cutting blades (3-5) are symmetrically arranged on the upper and lower sides and are both installed on the flat cutting tool holder (3-4). The second driving device (3-1) is used for driving the two flat cutting blades (3-5) to synchronously displace along the second screw sliding table (3-2).

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