Fixed-length cutting device for door frame upper strip product
By designing a fixed-length cutting device on the door frame that can be combined with the bending die, the problem of low production efficiency caused by the separation of fixed-length cutting and bending in the prior art is solved, and the seamless connection between fixed-length cutting and bending operations is achieved, which improves production efficiency and saves the equipment floor space.
Patent Information
- Application Number
- CN202421934776.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-08-09
AI Technical Summary
In the prior art, the fixed length cutting and bending of the strip on the door frame are carried out separately from two equipment, resulting in many processes and low production efficiency, and cannot adapt to high-efficiency production.
A fixed-length cutting device for door frame top products is designed. This device can be combined with a bending die. After a fixed-length cutting, bending operations can be performed without repeated positioning and clamping. The device includes a pressing part and a cutting part, and the linear motion and cutting functions are realized through the first and second fixtures, drive parts and other components.
The seamless connection between fixed-length cutting and bending operations is achieved, which eliminates the problem of repeated positioning between fixed-length cutting and bending, greatly improves production efficiency, and saves space occupied by multiple equipment.
Smart Images
Figure CN223011668U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of automotive parts processing, and particularly relates to a fixed-length cutting device for the upper strip product of a door frame. Background Art
[0002] Automotive door frames are accessory products with mature technologies, and the bending of the upper strip of the door frame is also a traditional and mature process. However, most of the current production lines are legacy ones. When bending the upper strip of the door frame, fixed-length cutting and bending are carried out on two separate devices. Before the bending device bends and forms, fixed-length cutting needs to be carried out on the cutting device, and then it is placed on the bending device for bending operations. There are many processes and repeated positioning is required, so the production efficiency is low and it cannot adapt to high-efficiency production. Summary of the Utility Model
[0003] This application aims to solve one of the above technical problems in the prior art. To this end, the embodiments of this application provide a fixed-length cutting device for the upper strip product of a door frame, which can be combined with a bending die, and can carry out bending operations after fixed-length cutting without repeated positioning and clamping.
[0004] According to the fixed-length cutting device for the upper strip product of a door frame provided by the embodiments of this application, the fixed-length cutting device is arranged in the middle of the bending die, the fixed-length cutting device is configured to be able to perform linear motion, the fixed-length cutting device includes a pressing part and a cutting part, the pressing part includes a first fixture, a second fixture and a first driving member, the second fixture can perform linear reciprocating motion towards the first fixture under the action of the first driving member, the cutting part includes a second driving member and a cutting tool, the cutting tool is hidden in the cutting groove of the first fixture, the cutting groove is arranged on the side of the first fixture facing the second fixture, and the second driving member is used to drive the cutting tool to extend out of or retract into the cutting groove.
[0005] According to the fixed-length cutting device for the upper strip product of a door frame described in the embodiments of this application, the first fixture has a first pressing surface, the second fixture has a second pressing surface corresponding to the first pressing surface, wherein, the cutting groove is arranged on the first pressing surface, and the first pressing surface and the second pressing surface are both arranged with grooves in an array.
[0006] According to the fixed-length cutting device for the upper strip product of a door frame described in the embodiments of this application, the pressing part further includes a first ejecting structure, the first ejecting structure includes a first air cylinder and an ejector pin, and the ejector pin can move to protrude from the first pressing surface under the action of the first air cylinder.
[0007] The fixed-length cutting device for the upper strip product of the door frame according to the embodiment of the present application, a second ejecting structure is arranged on the side of the second fixture, and the second ejecting structure includes a second cylinder and a push tongue, and the push tongue can move to protrude from the second pressing surface under the action of the second cylinder.
[0008] The fixed-length cutting device for the upper strip product of the door frame according to the embodiment of the present application, the fixed-length cutting device further includes a cutting part, the cutting part is arranged on the second fixture, and the cutting part includes a third driving part and a cutting knife, and the third driving part is connected to the cutting knife through a transmission structure, so that the cutting knife hidden in the second fixture can move to cooperate with the cutting groove on the second pressing surface.
[0009] The fixed-length cutting device for the upper strip product of the door frame according to the embodiment of the present application, the cutting part further includes a transmission part, the transmission part is fixed to the driving end of the third driving part, the transmission part has a first inclined surface, and the cutting knife has a second inclined surface adapted to the first inclined surface, and the first inclined surface and the second inclined surface constitute the transmission structure.
[0010] The fixed-length cutting device for the upper strip product of the door frame according to the embodiment of the present application, the cutting part further includes a spring, the second fixture has a card slot for the cutting knife to move, and the spring is arranged in the card slot, and the spring is used for the cutting knife to return to its original position.
[0011] The fixed-length cutting device for the upper strip product of the door frame according to the embodiment of the present application, the second fixture is further provided with a material discharging groove, the material discharging groove communicates with the cutting groove, and the material discharging groove is used for discharging waste materials.
[0012] The fixed-length cutting device for the upper strip product of the door frame according to the embodiment of the present application, the fixed-length cutting device further includes a first mounting seat and a first sliding seat, the first driving part, the second driving part and the first fixture are fixed to the first mounting seat, the first sliding seat and the first mounting seat are configured to be able to slide, and one end of the first sliding seat is connected to the driving end of the first driving part, and the other end of the first sliding seat is connected to the second fixture, and the first driving part and the second driving part are arranged back to back.
[0013] The fixed-length cutting device for the upper strip product of the door frame according to the embodiment of the present application, the fixed-length cutting device further includes a second sliding seat, the cross section of the first mounting seat is U-shaped, and the second sliding seat closes the open side of the first mounting seat to form a sliding groove for the first sliding seat to slide.
[0014] The above-mentioned fixed-length cutting device for the door frame upper strip product has at least the following beneficial effects: Before performing fixed-length cutting, the fixed-length cutting device of the present application moves to a specified position to receive the straight door frame upper strip conveyed. After the straight door frame upper strip arrives, the first driving member is activated and drives the second fixture to move towards the first fixture, so that the straight door frame upper strip can be pressed and positioned on the first fixture. Then, the second driving member of the cutting part drives the cutter to act. Through the cooperation of the cutter and the cutting groove, the straight door frame upper strip is cut into two sections of a predetermined length, and the two cut sections of the straight door frame upper strip are still in the situation of being pressed by the second fixture. Therefore, when the fixed-length cutting device of the present application moves to a position where the bending die can operate, the bending operation can be carried out without repositioning, saving the repeated positioning problem between the original fixed-length cutting and bending, greatly improving the production efficiency, and also saving the problem of large floor space occupied by multiple devices.
[0015] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. Brief Description of the Drawings
[0016] The present application will be further described below in conjunction with the drawings and embodiments;
[0017] Figure 1 is a schematic structural diagram of the combination of the fixed-length cutting device for the door frame upper strip and the bending die in the embodiment of the present application;
[0018] Figure 2 is a schematic structural diagram of the fixed-length cutting device for the door frame upper strip in the embodiment of the present application Figure 1 ;
[0019] Figure 3 is a schematic structural diagram of the sliding structure in the embodiment of the present application;
[0020] Figure 4 is a schematic structural diagram of the fixed-length cutting device for the door frame upper strip in the embodiment of the present application Figure 2 ;
[0021] Figure 5 is a schematic structural diagram of the fixed-length cutting device for the door frame upper strip in the embodiment of the present application Figure 3 ;
[0022] Figure 6 is a schematic structural diagram of the fixed-length cutting device for the door frame upper strip in the embodiment of the present application Figure 4 ;
[0023] Figure 7 is a schematic structural diagram of the fixed-length cutting device for the door frame upper strip in the embodiment of the present application Figure 5 ;
[0024] Figure 8 is Figure 7 a sectional view taken along the J-J direction in
[0025] Figure 9 a schematic structural view of the fixed-length cutting device for the upper strip of the door frame in an embodiment of the present application Figure 6 ;
[0026] Figure 10 is Figure 9 a sectional view taken along the H-H direction in
[0027] Figure 11 a schematic structural view of the fixed-length cutting device for the upper strip of the door frame in an embodiment of the present application Figure 7 ;
[0028] Figure 12 a schematic structural view of the fixed-length cutting device for the upper strip of the door frame in an embodiment of the present application Figure 8 ;
[0029] Figure 13 is a sectional view taken along the L-L direction in 12;
[0030] Figure 14 is a sectional view taken along the K-K direction in 12;
[0031] Figure 15 is a schematic connection view of the incision part and the second jig in an embodiment of the present application Figure 1 ;
[0032] Figure 16 is a schematic connection view of the incision part and the second jig in an embodiment of the present application Figure 2 ;
[0033] Figure 17 is Figure 16 a sectional view taken along the M-M direction in
[0034] Reference numerals: profiling jig 100, fixed-length cutting device 200, pushing oil cylinder 210, second sliding seat 220, second collecting box 221, first mounting seat 222, first sliding seat 223, first driving member 230, second driving member 240, cutting knife 241, first ejecting structure 250, first jig 260, first pressing surface 261, cutting groove 262, second jig 270, second ejecting structure 271, material discharging groove 272, first collecting box 273, incision groove 275, incision part 280, third driving member 281, transmission member 282, incision knife 283, spring 284, first sensor 285, second sensor 286, sensing member 287, straight strip door frame upper strip 300. Detailed implementation manners
[0035] This section will describe in detail the specific embodiments of the present application. The preferred embodiments of the present application are shown in the drawings. The function of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present application. However, it should not be construed as a limitation on the protection scope of the present application.
[0036] In the description of the present application, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the present application.
[0037] In the description of the present application, the meaning of "several" is one or more, the meaning of "multiple" is two or more, and understandings such as "greater than", "less than", "exceeding", etc. do not include the present number, and understandings such as "above", "below", "within", etc. include the present number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.
[0038] In the description of the present application, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present application in combination with the specific content of the technical solution.
[0039] Currently, the processing of the straight door frame upper strip 300 includes fixed-length cutting, bending, and punching. One device needs to be set up for each of the three processes of fixed-length cutting, bending, and punching. The layout of multiple devices occupies a large space, and repeated positioning is required when switching between processes. The processes are complicated and it is easy to have the situation of inaccurate positioning. To avoid the problem that bending cannot be carried out quickly after fixed-length cutting, referring to Figures 1 to 14 , the present application provides a fixed-length cutting device 200 for door frame upper strip products, which can be adapted to the bending die, so that the door frame upper strip can be directly bent after fixed-length cutting.
[0040] Specifically, as Figure 1 shown, the bending die mainly includes two profiling fixtures 100. The fixed-length cutting device 200 for door frame upper strip products of the present application is arranged at the middle position between the two profiling fixtures 100, that is, the middle part of the bending die, so that the straight door frame upper strip 300 can be directly bent into the left and right parts of the door frame upper strip on the profiling fixture 100 after fixed-length cutting, and the bending operation can be directly carried out without repositioning. Among them, the fixed-length cutting device 200 is arranged to be able to perform linear motion, so that the fixed-length cutting device 200 can conveniently feed materials.
[0041] Among them, the fixed-length cutting device 200 includes a pressing part and a cutting part. The pressing part includes a first fixture 260, a second fixture 270, and a first driving member 230. The second fixture 270 can perform linear reciprocating motion toward the first fixture 260 under the action of the first driving member 230. The cutting part includes a second driving member 240 and a cutting tool 241. The cutting tool 241 is hidden in the cutting groove 262 of the first fixture 260. The cutting groove 262 is arranged on one side of the first fixture 260 facing the second fixture 270. The second driving member 240 is used to drive the cutting tool 241 to extend out of or retract into the cutting groove 262.
[0042] Before performing fixed-length cutting, the fixed-length cutting device 200 of the present application moves to a specified position to receive the straight strip door frame upper strip 300 conveyed. After the straight strip door frame upper strip 300 is in place, the first driving member 230 is started and drives the second fixture 270 to move toward the first fixture 260, so that the straight strip door frame upper strip 300 can be tightly pressed and positioned on the first fixture 260. Then, the second driving member 240 of the cutting part drives the cutting tool 241 to act. Through the cooperation of the cutting tool 241 and the cutting groove 262, the straight strip door frame upper strip 300 is cut into two sections of a predetermined length, and the two cut sections of the straight strip door frame upper strip 300 are still in the situation of being tightly pressed by the second fixture 270. Therefore, when the fixed-length cutting device 200 of the present application moves to a position where the bending die can operate, bending operation can be performed without repositioning, saving the previous repeated positioning problem between fixed-length cutting and bending, greatly improving production efficiency, and also saving the problem of large floor space occupied by multiple devices.
[0043] In some embodiments, the fixed-length cutting device 200 of the present application further includes a first mounting seat 222 and a first sliding seat 223. The first driving member 230, the second driving member 240, and the first fixture 260 are fixed to the first mounting seat 222. The first sliding seat 223 and the first mounting seat 222 are configured to be able to slide. One end of the first sliding seat 223 is connected to the driving end of the first driving member 230, and the other end of the first sliding seat 223 is connected to the second fixture 270. The first driving member 230 and the second driving member 240 are arranged back to back. Arranging the first driving member 230 and the second driving member 240 back to back, that is, the first fixture 260, the first driving member 230, and the second driving member 240 are arranged in sequence. The use of the first sliding seat 223 makes the structure of the entire fixed-length cutting device 200 more compact. When integrated into the bending die, it is not necessary to make major modifications to the bending die, with strong adaptability. Moreover, the first sliding seat 223 and the first mounting seat 222 are configured to be able to slide. One end of the first sliding seat 223 is connected to the driving end of the first driving member 230 through an extension block, and the other end of the first sliding seat 223 is connected to the second fixture 270. The first mounting seat 222 plays a guiding role in the sliding of the first sliding seat 223, making the pressing and positioning of the first fixture 260 and the second fixture 270 more accurate.
[0044] Specifically, the fixed-length cutting device 200 further includes a second sliding seat 220. The cross-section of the first mounting seat 222 is U-shaped, and the second sliding seat 220 closes the open side of the first mounting seat 222 to form a sliding groove for the first sliding seat 223 to slide. The above structure effectively conducts the movement of the second driving member 240. In the embodiment of the present application, both the first driving member 230 and the second driving member 240 are oil cylinders.
[0045] In some embodiments, the fixed-length cutting device 200 for the door frame upper strip product of the present application is slidably arranged on the bending die through a sliding structure. The sliding structure includes a pushing oil cylinder 210 and a guide rail and slide rail structure. The second sliding seat 220 is fixed on the slider of the guide rail and slider structure, and the guide rail of the guide rail and slider structure is fixed on the bending die. The pushing oil cylinder 210 is fixed on the bending die and is connected to the second sliding seat 220 through a floating joint. Therefore, the position of the fixed-length cutting device 200 can be adjusted so that the fixed-length cutting device 200 can move to a specified position to receive the straight door frame upper strip 300 and bring the fixed-length cut product close to the profiling jig 100.
[0046] In some examples, such as Figure 4 and Figure 5 shown, the first jig 260 has a first pressing surface 261, and the second jig 270 has a second pressing surface corresponding to the first pressing surface 261. Among them, the cutting groove 262 is arranged on the first pressing surface 261, and the first pressing surface 261 and the second pressing surface are both arranged with grooves in an array. The arranged grooves prevent the first pressing surface 261 or the second pressing surface from generating a large adsorption force with the straight door frame upper strip 300 (if the first pressing surface 261 or the second pressing surface is a whole surface without grooves, it is easy for the straight door frame upper strip 300 to adhere to the first pressing surface 261 or the second pressing surface and is not easy to be unloaded during pressing), which is convenient for the subsequent unloading action after bending.
[0047] Furthermore, the pressing part further includes a first ejecting structure 250, that is, the first ejecting structure 250 is arranged on the first mounting seat 222. The first ejecting structure 250 includes a first air cylinder and a ejector pin. The ejector pin can move to protrude from the first pressing surface 261 under the action of the first air cylinder. When the fixed-length cutting is completed and the bending operation is completed, the arranged first ejecting structure 250 mainly ejects the bent door frame upper strip from the first pressing surface 261 during unloading, which is convenient for subsequent material transfer. Specifically, the ejector pin is inserted into the first jig 260, and the first air cylinder is fixed on the first jig 260. In the embodiment of the present application, the first ejecting structures 250 are arranged on both sides of the first jig 260.
[0048] Further, a second ejecting structure 271 is provided on the side of the second jig 270. The second ejecting structure 271 includes a second cylinder and a push tongue. The push tongue can move to protrude from the second pressing surface under the action of the second cylinder. When the bent door frame upper strip product adheres to the second pressing surface under the pressing force, the second cylinder is activated to drive the push tongue to push the door frame upper strip product away from the second pressing surface, facilitating the transfer of the product.
[0049] In some other embodiments, as Figures 13 to 17 shown, the fixed-length cutting device 200 further includes a cutting portion 280. The cutting portion 280 is provided on the second jig 270. The cutting portion 280 includes a third driving member 281 and a cutting knife 283. The third driving member 281 is connected to the cutting knife 283 through a transmission structure, so that the cutting knife 283 hidden in the second jig 270 can move to cooperate with the cutting groove 275 on the second pressing surface. Generally, a cutting notch needs to be punched at the end of the door frame upper strip before bending. In this application, the punching structure for the cutting notch is integrated into the fixed-length cutting device 200, so that the cutting notch is punched while the fixed-length cutting is performed. Specifically, the cutting groove 275 provided on the second pressing surface is used for ear positioning of the straight door frame upper strip 300. When punching the cutting notch, the cutting knife 283 moves towards the cutting groove 275 under the action of the third driving member 281, and the cutting notch is generated through rapid stamping. Among them, the third driving member 281 is connected to the cutting knife 283 through a transmission structure. The moving direction of the cutting knife 283 is a vertical movement, and the movement of the third driving member 281 is a horizontal movement. The transmission structure can convert the horizontal movement of the third driving member 281 into the vertical movement of the cutting knife 283 to complete the cutting operation.
[0050] Further, the third driving member 281 is an oil cylinder. The cutting portion 280 further includes a transmission member 282. The transmission member 282 is fixed to the driving end of the third driving member 281. The transmission member 282 abuts against the end of the cutting knife 283. Specifically, the transmission member 282 has a first inclined surface, and the cutting knife 283 has a second inclined surface adapted to the first inclined surface. The first inclined surface and the second inclined surface constitute a transmission structure, so that the horizontal movement of the oil cylinder can be converted into the vertical movement of the cutting knife 283.
[0051] Specifically, the cutting portion 280 further includes a spring 284. The second jig 270 has a slot for the cutting knife 283 to move. The spring 284 is arranged in the slot. The spring 284 is used for the cutting knife 283 to return to its original position. A notch for accommodating the spring 284 is provided in the slot. One end of the spring 284 abuts against one end of the slot, and the other end of the spring 284 abuts against the connecting end of the cutting knife 283, so that after the oil cylinder drives the transmission member 282 to return to its original position, the spring 284 can drive the cutting knife 283 to automatically return to its original position, preventing the cutting knife 283 from affecting the feeding of the next fixed-production cutting.
[0052] To ensure that the cutting knife 283 punches and returns to the original position in place, the cutting knife 283 is provided with a sensing member 287 extending outside the second fixture 270. A first sensor 285 and a second sensor 286 are arranged outside the second fixture 270. Both the first sensor 285 and the second sensor 286 are used to detect the sensing member 287, and the punching and returning conditions of the cutting knife 283 are judged according to the detection situation of the sensing member 287.
[0053] In some embodiments, the second fixture 270 is further provided with a waste discharging groove 272. The waste discharging groove 272 communicates with the cutting groove 275 and is used for discharging waste. The waste generated by the cutting knife 283 punching the straight strip door upper strip is led out of the second fixture 270 through the waste discharging groove 272, and a first collecting box 273 is arranged at the discharging port of the waste discharging groove 272. Further, an air vent cavity is arranged on the first fixture 260. When the first fixture 260 and the second fixture 270 jointly press the straight strip door frame upper strip 300, a positive pressure air flow is blown into the air vent cavity. The positive pressure air flow passes through the cutting groove 275 and the waste discharging groove 272, and can timely blow the waste in the waste discharging groove 272 into the first collecting box 273 to avoid blockage of the waste discharging groove 272.
[0054] In some other embodiments, as Figure 2 shown, the fixed-length cutting device 200 further includes a second collecting box 221, and the second collecting box 221 is used for collecting the cutting waste.
[0055] The embodiments of the present application have been described in detail above with reference to the accompanying drawings. However, the present application is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art in the technical field, various changes can be made without departing from the purpose of the present application.
Claims
1. A fixed-length cutting device for door frame upper strip products, characterized in that: The fixed-length cutting device is arranged in the middle part of the bending die, and the fixed-length cutting device is configured to be able to perform linear motion. The fixed-length cutting device includes a clamping part and a cutting part. The clamping part includes a first jig, a second jig and a first driving member. The second jig can perform linear reciprocating motion toward the first jig under the action of the first driving member. The cutting part includes a second driving member and a cutter. The cutter is hidden in the cutting groove of the first jig. The cutting groove is arranged on the side of the first jig facing the second jig. The second driving member is used to drive the cutter to extend out or retract into the cutting groove.
2. The fixed-length cutting device for door frame upper strip products according to claim 1 is characterized in that: The first fixture has a first pressing surface, and the second fixture has a second pressing surface corresponding to the first pressing surface, wherein the cutting groove is arranged on the first pressing surface, and the first pressing surface and the second pressing surface are both arranged with grooves in an array.
3. The fixed-length cutting device for door frame upper strip products according to claim 2 is characterized in that: The pressing portion further includes a first ejection structure, which includes a first cylinder and an ejector pin. The ejector pin can move to protrude from the first pressing surface under the action of the first cylinder.
4. The fixed-length cutting device for door frame upper strip products according to claim 2 is characterized in that: A second ejection structure is provided on the side of the second fixture. The second ejection structure includes a second cylinder and a push tongue. The push tongue can move to protrude from the second pressing surface under the action of the second cylinder.
5. The device for cutting to length for door frame upper strip products according to claim 2, characterized in that: The fixed-length cutting device also includes a cutting portion, which is arranged on the second fixture. The cutting portion includes a third driving member and a cutting knife. The third driving member is connected to the cutting knife through a transmission structure so that the cutting knife hidden in the second fixture can move to cooperate with the cutting groove on the second pressing surface.
6. The device for cutting to length for door frame upper strip products according to claim 5, characterized in that: The cutting portion further comprises a transmission member, which is fixed to the driving end of the third driving member. The transmission member has a first inclined surface, and the cutting knife has a second inclined surface matched with the first inclined surface. The first inclined surface and the second inclined surface constitute the transmission structure.
7. The device for cutting to length for door frame upper strip products according to claim 6, characterized in that: The incision portion further comprises a spring, and the second fixture comprises a slot for the incision knife to move, the spring is arranged in the slot, and the spring is used for returning the incision knife to its original position.
8. The device for cutting to length for door frame upper strip products according to claim 5, characterized in that: The second fixture is also provided with a material return groove, which is connected to the cutting groove and is used to discharge waste materials.
9. The device for cutting to length for door frame upper strip products according to claim 1, characterized in that: The fixed-length cutting device also includes a first mounting seat and a first slide seat, the first driving member, the second driving member and the first fixture are fixed to the first mounting seat, the first slide seat and the first mounting seat are configured to be able to slide, and one end of the first slide seat is connected to the driving end of the first driving member, and the other end of the first slide seat is connected to the second fixture, and the first driving member and the second driving member are arranged back to back.
10. The device for cutting to length for door frame upper strip products according to claim 9, characterized in that: The fixed-length cutting device also includes a second slide seat. The cross section of the first mounting seat is U-shaped. The second slide seat closes the open side of the first mounting seat to form a slide groove for the first slide seat to slide.